Illumination system and liquid crystal display device using said system

FIELD: technological processes.

SUBSTANCE: invention relates to lighting engineering. The illumination system comprises a light-emitting part (1), having light sources configured to emit light beams at different dominant wavelengths, and an image-forming optical system (3), having microlenses (3a) configured to focus the light beams emitted by the light-emitting part (1). The illumination system is configured to illuminate a liquid crystal panel with light beams passing through the image-forming optical system (3). The liquid crystal panel has pixels which are spaced apart by a predetermined spacing and each of which has display elements corresponding to each separate colour, and under the condition that the spacing of the pixels is denoted by P, and the image-forming optical system has a zoom factor (1/n), the light sources are spaced apart by a spacing P1, given as P1=n × P, and the microlenses are spaced apart by a spacing P2, given as P2=(n/(n+1)) × P.

EFFECT: high quality of display by suppressing non-uniformity of brightness and colour in the display screen.

32 cl, 16 dwg

 

The technical field

The present invention relates to lighting systems, and to liquid crystal display devices using such illumination systems and, in particular, to a lighting system that focuses the different color components of the light on the rear surface of the corresponding display elements, in which each pixel is operating at transmission element of the liquid crystal display is divided according to the color, and the liquid crystal display device performs full-color display with a backlight and the liquid crystal display element.

The level of technology

Typically, the liquid crystal display device performing full-color display, reaches full-color display, separating each pixel element, operating at transmission liquid crystal display, three display element, attaching the red (R), green (G) and blue (B) color filters of three display elements, respectively, covering the three display element, white light from the backlight, and controlling, in accordance with the signal representing the voltage applied to the liquid crystal cell of each display element, the transmittance of the white light passing through this display is the distorting element.

However, since each of the color filters R, G and passes light of wavelengths of the respective wavelength range and absorbs light of wavelengths in other wavelength ranges, such uses color filters of liquid crystal display device loses about 2/3 of the light and therefore has a low level of efficiency of use of light. Although there are full-color how to display without color filters, called the method of successive illumination colors, this method suffers from a bundle of flowers.

It has recently been suggested display device based on operating at transmission modulation element and containing the illumination device with improved light utilization efficiency in the case where LEDs are used as light sources for illumination (see Patent literature 1). This display device includes: an element of the playback image (liquid crystal panel), which contains a two-dimensional array of holes and is capable of controlling transmittance independently for each color; combining the light path of the optical system containing a two-dimensional array of a large number of pairs of microlenses, acting as a biconvex lens; the optical system of illumination at different angles to the COI is producing the main rays of different colors towards combining the light path of the optical system; and the light sources emitting light of different colors.

Since the display device of Patent literature 1 can be configured so that the effect of optical illumination system allowed the color components of light from the light sources to enter the combining of the light path of the optical system at angles of the main beam, is different for different colors, and the refractive effect of combining the light path of the optical system allowed the color components to focus on the holes in the element image playback, you can divide each pixel into three display element and focus of different color components of light reflecting elements, respectively (the separations of each pixel according to the color component light). Therefore, according to Patent literature 1, there is no need in the color filter, and subject to achieve perfect separation there is no loss of light. However, it should be borne in mind that the Patent literature 1 does not exclude the use of a color filter to prevent unwanted mixing of colors due to a small leak at the coupling separations.

The abovementioned materials

Patent literature 1

The publication of the Application in Japanese patent Tokukai, No. 2007-328218 (date of issue: 20th December the December 2007)

The invention

The objective of the invention

In the display device of Patent literature 1, the illumination device contains the following components: combining the light path of the optical system containing a two-dimensional array of a large number of pairs of microlenses, acting as a biconvex lens; the optical system of illumination at different angles emits main rays of different colors towards combining the light path of the optical system; and light sources emitting light of different colors. When the illumination device main beams of different colors emitted by the different angles of the optical lighting system, directly included in the combining of the light path optical system containing a two-dimensional array of a large number of pairs of microlenses, acting as a lenticular lens, the main rays of different colors fall from different angles in different positions on the input surface of the combining of the light path of the optical system. Therefore, in order to focus the color components of the light on the holes in predetermined respective display elements, it is necessary that the shape of the microlenses combining the light path of the optical system was changed from one position to another on the entrance surface (or, optionally, on the one surface combining the light path of the optical system). This makes the design and manufacture of extremely difficult. Therefore, as described in paragraph [0036] of the Patent literature 1, a Fresnel lens positioned so that they were facing the entrance surface of the array of microlenses, and a Fresnel lens is used so that the different color components of light emitted at different angles of the optical lighting system, reflected essentially in the same direction or, preferably, in a direction essentially parallel to the optical axis of each microlens (with changed direction), and different color light components included in an array of microlenses, essentially at the same angle regardless of their provisions on the input surface.

In this case, as in Patent literature 1, which share an array of microlenses and a Fresnel lens, in the area near its focal point, each Fresnel lens may reject the light beams coming from the optical illumination system, essentially in the same direction regardless of their positions, but when it is illuminated by the light beams from the optical system of the lighting in the area near the focus of the adjacent Fresnel lens, it is illuminated by beams of light distant from the optical axis of this Fresnel lens, and, therefore, cannot focus the light beams on the holes in predefined with the appropriate display elements. Those beams of light that cannot be focused, form a diffused light, causing great deterioration in the quality of the reproduced image. This phenomenon here called cross an obstacle.

Therefore, in the case where share an array of microlenses and a Fresnel lens, it is necessary to avoid crosstalk at the interface between the regions, which was divided display screen. Thus, it is important to formulate such a design approach, which does not allow the beams of light existing in a certain area to get in a related area. The term "area" means the area that must be lit by a single element of the illumination system. Typically the display screen is divided into several areas.

However, this design approach does not provide overlapping areas, and, therefore, undesirable way exacerbates the nonuniformity of luminance and color heterogeneity, especially at the interface between the regions, which was divided display screen. In particular, since the heterogeneity of color is much more noticeable non-uniformity of the brightness, it is necessary to achieve color uniformity with a higher degree of precision.

The present invention was made in connection with the above-mentioned disadvantages, and the present invention is the creation of illumination systems, which which can increase the display quality, suppressing the nonuniformity of luminance and color heterogeneity on the display screen.

Problem solving

To resolve the above shortcomings, the present invention associated with a radical change of approach to the design, achieves uniformity through the active use of the area of overlap between areas without the use of Fresnel lenses, which can be a factor causing cross-interference. A summary of the configurations of the present invention is as follows:

Illumination system according to the present invention includes: a light-emitting part containing a light source, configured to radiation light beams on different dominant wavelengths; and an optical system for forming an image containing a microlens made with the possibility of focusing the light beams emitted from the light emitting part, and a system for the illumination made with the possibility of lighting the liquid crystal panel, the light beams passing through the optical system for forming an image, the liquid crystal panel includes pixels that are separated from each other at a predetermined pitch, and each of which contains display elements corresponding to each color, provided that step, in which the pixels are separated from each other, denoted by ka is R, optical system for forming an image has image magnification (1/n), the light sources are separated from each other by a step P1defined as P1=n×R, and the microlenses are separated from each other by a step P2defined as P2=(n/(n+1)) × R.

The liquid crystal display device according to the present invention contains the above-described illumination system, and this liquid crystal display device includes: a liquid crystal element containing a liquid crystal layer and the input and output glass substrate, located respectively on the input side and output side of the light beam, so that the liquid crystal layer placed between them; a control device which controls the liquid crystal element; a polarizer located on the entrance glass substrate of the liquid crystal element; an analyzer located at the exit of the glass substrate of the liquid crystal element; and a diffusing element located at the exit surface of the analyzer, and the liquid crystal element, a control element, a polarizer, analyzer and the scattering element is arranged on the side facing the surface to the light output of the microlenses.

Useful effect of the invention

In accordance with the present invention, in the system podshock the light beams from the light sources, emitting distinguished from each other color light components, you can focus on the respective display elements, and the color components of light that are spatially distinct from each other, can be separated from each other. In addition, in the case when such an illumination system is used as a surface emission light source for liquid crystal display devices that are spatially separated from each other, the light beams from the light sources can be focused on the respective liquid crystal layers, so that at the same time can be achieved by improving the use efficiency of light from the light sources and full-color display. In addition, it effectively reduces the nonuniformity of luminance and color heterogeneity between areas within the display screen, and is achieved by displaying a higher quality. In addition to this can be achieved by reducing the thickness, and the light utilization efficiency can also be improved.

Brief description of drawings

Figure 1 shows a schematic view (cross-section), schematically showing the embodiment of the present invention.

Figure 2 shows a schematic view (cross-section), schematically showing the embodiment of the present invention.

p> Figure 3 shows a schematic view (cross-section), schematically showing the embodiment of the present invention.

Figure 4 shows a schematic view (cross-section), schematically showing the embodiment of the present invention.

Figure 5 shows a schematic view (cross-section), schematically showing the embodiment of the present invention.

Figure 6 shows a schematic view (three-dimensional image), schematically showing the embodiment of the present invention.

Figure 7 shows the schematic view (three-dimensional image), schematically showing the embodiment of the present invention.

On Fig shows a schematic view (three-dimensional image), schematically showing the embodiment of the present invention.

Figure 9 shows a schematic view (cross section), schematically showing the difficulty during installation.

Figure 10 shows a schematic view (cross section), schematically showing the embodiment of the present invention.

Figure 11 shows an explanatory diagram (cross section), schematically showing the definition of the effective bright point.

On Fig shows a schematic view (cross-section), schematically showing the embodiment of the present invention.

On Fig shows an explanatory chart for explaining the operation principle of the optical system, which is based on the present invention.

On Fig shows the distribution of the values of the chromaticity coordinates along the direction perpendicular to the direction, along which the LEDs are arranged in the exemplary embodiment of the present invention.

On Fig shows a chromaticity diagram representing the spectral characteristic corresponding to the dotted lines on Fig.

On Fig shows a schematic view (cross-section), schematically showing the embodiment of the present invention.

Description of embodiments of the invention

An example implementation of the present invention is described below with reference to Figure 1-16. It should be borne in mind that the present invention should not be limited to such example embodiment of the invention.

Figure 1 shows a schematic view showing the exemplary embodiment of the present invention. In this example, the array of light sources is carried out using R (red) light, G (green) light and B (blue) light sources as the light sources 1 (light emitting part)that produce distinct from each other color light components, and these light sources are positioned so that the group IP is full of light R, G, and b, which are located in this order from the right side to the left side of Figure 1, were combined together and follow one another. It should be borne in mind that the number of types of color light sources 1 may be four or more, and the order in which you follow the light sources in each group do not necessarily have to be RGB.

It is preferable to use one type of light source in the form of an led (light emitting diode), a laser light source or an organic electroluminescent light source as each of the light sources 1; however, you can use a combination of two or more types. In this case, it is preferable to use a light source (led) or organic electroluminescent light source in an optical system having, as shown in the example of figure 11, a bright point 10 and the focusing lens system 11, which focuses the beam of light from a bright point 10, led lamp, containing led crystal bright point 10, or organic electroluminescent lamp located in a bright point 10, because the use of such led lamps or such organic electroluminescent lamp increases the directivity of the light from the light source.

The term "effective striking point 1A"used in the present who eat the invention, is defined as a virtual image of a bright point 10 of the focusing lens system 11, shown figure 11. In the case of the light source 1 without such a focusing lens system 11, an effective bright point 1A coincides with the bright point 10.

In addition, the term "step P1between the effective bright points (step, which are light sources)in the form as it is used in the present invention, means mezhdurechnoe the effective distance between bright dots 1A of the light sources of the same color.

The optical system 3 to form the image receives the light beams from the array of light sources and focuses on representing the elements (display elements R, G and b, located in this order from the left side to the right side of Figure 1), in which each of the pixels 5 arranged with a predetermined pitch (pixel pitch) p on the matrix surface of the array of 4 pixels that are spatially separated according to the color corresponding to the color component light R on the display element of R light, G represents an element of G and the light on the display element).

Here it should be noted that instead of using light sources 1 in the present invention as a light-emitting part can be used light-emitting device containing the light source 1 and the optical fibers 14, the AK is shown in Fig. The use of such light-emitting devices leads to a large decrease in the cost due to the reduced number of light sources. Below described is a light-emitting device.

As shown in Fig, the light emitting device 12, intended for use in the present invention contains the optical fibers 13, and guides the light beams from the light source 1 toward the ends and causing output light beams through these ends, which is considered as pseudostatic light. For example, as shown in Fig, beams of light from one source RGB 1 light individually routed through three blocks of the backlight (the light guides 13). The blocks of the backlight (the light guides 13) form R', G' and' pseudostatic 14 light, and the optical system 3 to form the image focuses the light beams from the R', G' and' pseudohistorical 14 light on the matrix surface of the array of 4 pixels, and thereby achieves the same effect as in the case of using the light sources R, G and B.

To ensure that the function of the focusing optical system 3 for image formation, in the present invention as an optical system 3 for forming an image using an array of microlenses 3A, having a magnification equal to (1/n). This array of microlenses 3A form, having the microlenses 3A one is a similar shape with uniform intervals. Here it should be assumed that the step P1between the effective striking points of the array of light sources (step, which have light sources) is given by the expression P1=n×R, and that the step P2with whom have the microlenses 3A, is defined by the expression R2=(n/(n+1)) × R.

Thus, for example, as shown in figure 1, if we set the distance b from the array of microlenses 3A to array of 4 pixels in accordance with the focal length f of the array of microlenses 3A in the form b=((n+1)/n)×f and determine the length of the path of the main beam from each effective bright point 1A to the array of microlenses 3A in the form a=n×b, the beams of light from the light sources R, G, and light can be focused on representing the elements R, G and b respectively. In other words, increased to 1/n times the actual image can be formed on the pixel array as an array of light sources.

Each display element, the image formed by the light beams from light sources that emit color light component that corresponds to the color of this display element, are imposed on each other. Therefore, the spatial uniformity is achieved and there is no more structure on the boundary between the regions, which was divided display screen. This effectively reduces the nonuniformity of luminance and color heterogeneity between the area of the mi within the display screen, leading, thus, to display a higher quality.

It should be borne in mind that figure 1 only shows the path of the beam of light (R light) from sources of R light to the display elements R and omitted the path of the beams G or light.

The principle of operation of the optical system, which focuses the beams of light from the light sources R, G, and light reflecting elements R, G and b respectively, and causes the light beams from the light sources of the same color overlap identical displays item mathematically explained with reference to Fig. It should be borne in mind that Pig only illustrates the path of the principal rays passing through the center of the microlenses 3A, and shows the path of the G light or light. Fig also does not reflect the phenomenon of refraction occurring at the border section of the microlenses 3A due to the difference of refractive indices. Here it is assumed that L1and L2denote the position of two adjacent sources R light Fig that M1and M2denote the centers of the microlenses 3A, and R1and R2denote showing the elements of R.

First of all, in order that the beam of light from each source R light focused on each individual display element R, it is necessary that the triangle L1R1R2and the triangle L1M1M2on Pig were similar. To comply with the Oia, this condition must be satisfied the following formula:

Length M1M2/Length L1M1=Length R1R2/Length L1R1.

Step R2with whom are the microlenses 3A, corresponds to the length of M1M2and , therefore, is obtained from the following expression in terms of a ratio based on the above formula:

Length M1M2=Length L1M1× Length R1R2/Length L1R1,

where Length L1M1=a=n × b, the Length of R1R2=R and Length L1R1=a+b=(n+1) × b. Therefore, the length of M1M2is calculated according to the formula M1M2=n × P / (n+1). Accordingly, in the case when the length of M1M2equal to the step between the lenses in the array of microlenses is n × P / (n+1), the light beam from each source R light can be focused on each individual display element R.

Then, in order for the light beams from multiple light sources (here, the light beams from the two sources R light) focused on a single display element R, it is necessary to Fig triangle L1L2R1and the triangle M1M2R1were similar. To meet this must be done the following formula:

Length L1L2/ Length L1R1=Length M1M2/ Length M1R1.

The step between the effective bright and points of the array of light sources corresponds to the length L 1L2and, therefore, is obtained from the following expression in terms of a ratio based on the above formula:

Length L1L2=Length L1R2× Length M1M2/ Length M1R1,

where Length L1R1=a+b=(n×1) × b and the Length of M1R1=b. When using the extracted higher ratio of Length M1M2=n × P / (n+1)". Therefore, the length L1L2is calculated as L1L2=n × R. In accordance with this, in the case when the length L1L2that is equal to the step between the effective striking points is n × P, the light beams from the light sources (here, the light beams from the two sources R light) can be focused on a single display element R.

These two results show that if we define the step P1between the effective striking points, P1=n × P, and to determine the step P2with whom are the microlenses 3A, both P2=n × P/(n+1), then the beam of light from each source R light can be focused on each individual display element R and, at the same time, the light beams from sources of R light can be focused on a single display element R, superimposed on each other. The same applies to the case when R is replaced by G or C.

An array of microlenses 3A is a lens, which is the implementation of the Jena with the ability to change the direction of the optical path through (i) the shape of the lens surface, or (ii) the distribution of refractive index within the lens, and preferably can be implemented in the form of lenses of the "eyes of the fry", consisting of microlenses located along two perpendicular to each other directions, or in the form of a biconvex lens, consisting of microcylindrical lenses along one direction perpendicular to their long side, or a combination of both.

Here it should be noted that in the case where the optical path is deflected due to the impact of the shape of the surface, the optical path is deflected according to the law of Snell's law using the difference of the refractive index on the interface surface coincident with the surface of the lens. On the other hand, in the case where the optical path is deflected due to the distribution of the refractive index, the light is deflected due to the distribution of refractive index within the lens. This means creating a gradient of refractive index inside the lens, when the refractive index changes from the center to the periphery of the lens, and causes a deflection of the light by means of the gradient of refractive index.

Although the present invention uses an array of light sources and an array of microlenses, the present invention differs from the conventional technology in that it does not use a Fresnel lens. Although the present invention does not use a Fresnel lens, a direction which creates an image of the principal rays perpendicular to the surface of the array of pixels, so what is implemented is a physical phenomenon, as if a double telecentric image was obtained only when the array of microlenses. This phenomenon allows the present invention to realize, only when using an array of microlenses, double afocal telecentric image, which is usually obtained from a combination of the Fresnel lens and the array of microlenses. This results in a homogeneous structure, which avoids crosstalk at the interface between fields.

Of course, for example, in the case when playing such an image where there is a large difference in brightness between a wide area and the remaining area within the entire screen, dividing the entire screen into several blocks facilitates control of brightness and color. As an example of this variant embodiment of the invention the present invention preferably is configured such that: an array of light sources and the array of microlenses is divided into several blocks, and the optical axis of the light sources is turned so that the light beams emitted by the blocks of the array light source, at least essentially the same entered in the appropriate blocks of the array of microlenses.

A variant of this embodiment of the invention shown in figure 2. Figure 2 illustrates the situation is s, in which, in order that the light beams emitted from the three (a, b, C) sources of R light within the same block are essentially the same included in the corresponding block of the array of microlenses 3A, the optical axis 2 (a, C) sources of R light from both sides turned in the direction of the arrows 21 relative to effective striking points 1A. The same applies to light sources G and to the light sources Century.

In addition, for example, as shown in Figure 3(a), in the present invention as a constituent element of the optical system 3 to form the image type Converter SV polarization, which is converted to the input side of the array of microlenses 3A and which contains an element 30, which transmits specific polarized light beam and reflects the remaining light beam, and a half-wave plate 31, to the upper part of which is attached to the specified element 30.

This allows only specific terms of the light beam to enter the array of microlenses 3A. Therefore, in the case when the array of pixels formed liquid crystal element, the polarizer facing the entrance of the liquid crystal element is set so that could be skipped specifically polarized light beam. It almost completely eliminates the absorption of light by the polarizer, improving the traveler, thus, the light utilization efficiency. The preferred option element 30, which transmits the specific polarized light beam and reflects the remaining light beam, a polarizer is of wire mesh produced by the company Asahi Kasei Corporation.

It should be borne in mind that figure 3(a) shows only effective bright dots that correspond to the light sources of the same single color, and omitted those for other colors, in order not to complicate the drawing. Similarly, in each of the following drawings, which show only effective bright spots corresponding to the light sources of the same single color, omitted those for the other colors.

In addition, for example, as shown in Figure 3(b), the present invention adds, as an integral element of the optical system 3 to form the image based on Figure 3(a), flat mirror 3C, reflecting the beam of light emitted from the Converter 3V polarization and allowing the light beam to enter the array of microlenses 3A.

This improves the above-mentioned light utilization efficiency. In addition, in the case of units, divided as mentioned above, the boundary between the blocks can be distinguished, so that it becomes even easier to control the brightness and color for each individual block.

Cu is IU, for example, as shown in Figure 4(a) and (b), the present invention adds, as constituent elements of the optical system 3 to form the image based on Figure 3(a), (i) collimating reflective mirror 3D made with the possibility to reflect the beam of light emitted from the transducer 3B of the polarization state, and to convert the light beam into the beam, essentially parallel to the main beam from the effective bright points 1A and (and) fully reflecting prismatic panel 3E, which is made with the ability to fully reflect the beam of light emitted from the collimating reflective mirror 3D and to provide an opportunity for the light beam to enter the array of microlenses 3A, in which the effective bright point 1A on the merits is located in the area near nonaxisymmetric focal position F1 collimating reflective lens 3D. It should be borne in mind that in figure 4(a) f1 denotes a nonaxisymmetric focal length collimating reflective lens 3D.

In this case, when determining the distance b from the array of microlenses 3A to array of 4 pixels according to the focal length f of the array of microlenses 3A as b=((n+1)/n)×f and the definition of the path length of the main beam from each effective bright point 1A to the array of microlenses 3A as a=n×b, the beams of light from the light sources R, G, and light can be focused on representing the elements of R, G, is respectively. In other words, a valid image enlarged to 1/n times, can be formed on the array of 4 pixels as an array of light sources.

This improves the above-mentioned light utilization efficiency and facilitates control of the brightness and color for each individual block. In addition, the angle of the main light beam from the light source with respect to a line perpendicular to the surface of the array of pixels can be made large, so that there may be achieved a significant reduction in thickness. It should be borne in mind that in this embodiment, of the invention can achieve a uniform light intensity distribution within a single block, which qualitatively shown by the curve of light intensity distribution in figure 4 (a), and effectively prevent the penetration of light in the adjacent block.

In addition, the present invention may have the configuration shown in Figure 3(a), which is an example implementation of the invention in which the light sources and a Converter for converting the state of polarization can be easily fixed, when the light sources and a Converter for converting the polarization state is installed in the system display devices (for example, in liquid crystal television and the like). In this example embodiment of the invention, such as dormancy is shown in Figure 5, solid refractive medium 6 containing the converters 3V polarization, is added as a constituent element of the optical system 3 to form the image. This solid refractive medium 6 contains part 6A, which contains each Converter 3V polarization, and part 6A has a cross section in the form of an isosceles triangle, isosceles part of which is totally reflected light beam from the transmitter 3V polarization, and at this step P1between the effective striking points 1A is replaced by the step P1between points 1B imaginary image, which occurs when the light beam included in solid refractive medium 6 from the effective bright point 1A, is totally reflected isosceles part. Thus, the step between the effective striking points 1A replaced as step P1step R1between points 1B imaginary image, which occurs when the light beam included in solid refractive medium 6 from the effective bright point 1A, is totally reflected isosceles part.

In this case, when determining the distance b from the array of microlenses 3A to array of 4 pixels, according to the focal length f of the array of microlenses 3A, as b=((n+1)/n)×f and the definition of the path length of the main beam from each effective bright point 1B to which assive microlenses 3A as a=n × b, valid image enlarged to 1/n times, can be formed on the array of 4 pixels as an array of light sources.

Solid refractive medium 6 can be made of acrylic resin, glass and the like, it is Preferable that the portion 6A in the form of an isosceles triangle had the angle at the vertex, is approximately equal to 60 degrees, because when part 6A in the form of an isosceles triangle has one angle at the vertex, the light beam obtained when the vertical drop of the main light beam from the light source portion 6A and the full reflection of this part, may be oriented essentially along the optical axis of the array of microlenses.

This allows you to fix the light sources 1 and converters 3V polarization, using the frame 50 of the rear surface and column 51 of the system display device. In addition, when using the space between adjacent isosceles triangular portions 6A can be installed auxiliary elements 15 of the light source (such as the management chain, the energy source, heat sink, heat sink, fan and so on).

However, in the example installation using solid refractive medium is shown in Figure 5, there is a problem of increasing the thickness (which leads to weight gain), as in the case of figure 9, where use is facilitated by the acrylic medium. Figure 9 increase in thickness was estimated as the ratio (h2/h1), where the height h2 measured from the effective bright point 1A to the field of size L1 × L1, illuminated by the light source in acrylic medium, and the height hi is measured from the effective bright point 1A to the field of size L1 × L1, illuminated by the light source in the air.

This problem of increased thickness can be solved by direction of the main beam from each light source in parallel, to the extent possible, the surface of the array of pixels and, prior to its entry into an array of microlenses, the return of light and the subsequent rejection of the returned light along the optical axis of the array of microlenses. Figure 6 shows an example of a mounting structure suitable for this method returns.

In this example embodiment of the invention the illumination system according to the present invention is performed so that the beam of light from each source 1 of light included in solid refractive medium 6 through the input surface 60 solid refractive medium 6, and then a metal reflected by the surface 61 back reflections solid refractive medium 6, and then came out of the solid refractive medium 6 through the output surface 62 solid refractive medium 6, and then included in the optical plate 7 through the input surface 70 of the optical plate 7, and then reflected by the surface about Atego reflection 71 of the optical plate 7 and then came out of the optical plate through the output surface 72 the optical plate 7 in the direction of the array of microlenses 3A. In addition, the space between the solid refractive medium 6 and the optical plate 7 is filled with 8 matching refractive indices. It should be borne in mind that solid refractive medium 6, the optical plate 7, item 8 approval of the refractive indices are added as components of the optical system 3 to form the image.

The input surface 60 solid refractive medium 6 includes parallel spaced region identical in shape, sootvetstvujushchijemu individual block BLK of the array of light sources. The surface 61 back reflections solid refractive medium 6 includes parallel spaced reflective mirrors MMS identical shape with a metallic coating, corresponding to each individual block BLK of the array of light sources and reflective mirrors MMS with a metal coating serving to reflect light beams from the input surface 60. The output surface 62 solid refractive medium 6 is a flat surface.

The input surface 70 of the optical plate 7 is one of the two surfaces, among which is the angle at the vertex of the prism prismatic panel PRMS. Reflective surface 71 of the optical plate 7 is a surface (which corresponds to the reflecting mirror MMS with metal is static coating), obtained by coating the other of the two surfaces of the metal film. The output surface 72 of the optical plate 7 is a flat surface.

Item 8 approval of the refractive index has an input surface 80 and the output surface 81 which are in contact with the output surface 62 solid refractive medium 6 and the input surface 70 of the optical plate 7, respectively.

The light beam emitted from each light source 1, is in solid refractive medium 6 through the input surface 60, a back surface 61 back reflections with metallic reflection, included in item 8 approval of refraction through the output surface 62 (entrance surface 80), goes straight to enter the optical plate 7 through the output surface 81 (input surface 70), metallic is reflected by reflective surface 71 to exit through the output surface 72, and is included in the array of microlenses 3A.

Incoming therefore, the light beams form an enlarged (1/n) times the image on the array of 4 pixels as a matrix structure, effective striking points 1A. Because the expression P1=n×R and R2=(n/(n+1))×P are satisfied within the framework of the present invention, the step between images effective bright dots on a matrix structure is re, of which was formed image may coincide with the pitch P of the pixels.

This method return beam allows to drastically reduce the distance from each light source to the surface of the array of pixels (the length of the vertical lines extending from each light source to the surface of the array of pixels), solving thus the problem of increasing thickness.

In addition, the illumination system of the present invention also provides a mounting structure suitable for this method return beam. An example of this embodiment of the invention shown in Fig.7(a).

In this example embodiment of the invention the illumination system shown in figures 1 and 2, carry out so that the light beam from each source 1 of light included in solid refractive medium 6 through the input surface 60 solid refractive medium 6, and then a metal reflected by the surface 61 back reflections solid refractive medium 6, and then came out of the solid refractive medium 6 through the output surface 62 solid refractive medium 6, and then the metal was reflected by a metal surface 63 located at the outlet of the solid refractive medium 6, and went towards the array of microlenses 3A. It should be borne in mind that solid refractive medium 6 add status as the main element of the optical system 3 to form the image.

The input surface 60 solid refractive medium 6 includes parallel spaced region identical shape corresponding to each block BLK of the array of light sources. The surface of the back reflections 61 solid refractive medium 6 includes parallel spaced reflective mirrors MMS identical shape with a metallic coating, corresponding to each individual block BLK of the array of light sources and reflective mirrors MMS with a metallic coating designed to reflect light beams from the input surface 60. The output surface 62 solid refractive medium 6 is one of the two surfaces, among which is the angle at the vertex of the prism. Reflective surface 63 on the output side, solid refractive medium 6 is the surface (which corresponds covered by the metal reflecting mirror MMS), obtained by applying a metal film on the other of the two surfaces.

Presented on Fig.7. (a) an example embodiment of the invention corresponds to the situation that turns out, if you remove the optical plate 7 (prismatic panel PRMS) and item 8 approval of the refractive indices of the embodiment of the invention figure 6, change the shape of the output surface 62 of solid-phase prelolas the th environment 6 from the flat shape to form an array of prisms, by continuing to use as the output surface 62 of one of the two surfaces, among which is the angle at the vertex of the prism, and putting on another surface of the metal film to form a reflective surface 63 on the output side.

The light beam emitted by each source 1 of light is in solid refractive medium 6 through the input surface 60, is returned by the surface 61 back reflections with metallic reflection, exits through the output surface 62 in the air is deflected due to refraction, then rejected a reflective surface 63 on the output side with metallic reflections and comes in an array of microlenses 3A.

As in the illumination system shown in Fig.6, incoming therefore, the light beams form an enlarged (1/n) times the image on the array of 4 pixels as a matrix structure, effective striking points 1A and step between images effective bright dots on a matrix structure, which was formed image may coincide with the pitch P of the pixels.

In addition, the illumination system of the present invention also provides a mounting structure that is appropriate for the method of the return beam. An example of this embodiment of the invention shown in Fig.7(b).

In this example implementation invented the I the illumination system, shown in figures 1 and 2, carry out so that the beam of light went from solid refractive medium 6 through the output surface 62 solid refractive medium 6, and then included in the optical plate 7A through input surface 70 of the optical plate 7A and out of the optical plate 7A through the output surface 72 of the optical plate 7A in the direction of the array of microlenses 3A. In addition, the space between the solid refractive medium 6 and the optical plate 7A is filled with 8 matching refractive indices. It should be borne in mind that the optical plate 7A and 8 matching refractive indices add as constituent elements of the optical system 3 to form the image.

The input surface 70 and the output surface 72 of the optical plate 7A are parallel to each other flat surfaces. Item 8 approval of the refractive index has an input surface 80 and the output surface 81 that is in contact with the output surface 62 solid refractive medium 6 and the input surface 70 of the optical plate 7A, respectively. Item 8 approval of refractive indices fills the space between the output surface 62 solid refractive medium 6 and the input surface 70 of the optical plate 7A.

The beam of light, and is emitted by each of the light sources 1, comes in solid refractive medium 6 through the input surface 60, is returned by the surface 61 back reflections with metallic reflection, included in item 8 approval of refraction through the output surface 62 (entrance surface 80), goes straight to deviate reflective surface 63 on the output side with metallic reflection, and then included in the array of microlenses 3A through input surface 70, the inner part of the optical plate 7A and the output surface 72 in the specified order.

As in the illumination system shown in Fig.7(a), forming thus the light beams form an enlarged (1/p) times the image on the array of 4 pixels as a matrix structure, effective striking points 1A and step between images effective bright dots on a matrix structure, which was formed image may coincide with the pitch P of the pixels.

In addition, in an effort to better control the degree of parallelism of the light beam that propagates from the input surface 60 to the surface 61 back reflections, the lighting system of the present invention is preferably configured so that the input surface 60 solid refractive medium 6 contained (i) a flat surface or (ii) of the lens surface, each of which is one is by convex or concave in at least one plane, perpendicular and/or parallel to the direction of arrangement of the light sources 1 are the same color.

It should be borne in mind that figure 6 shows the case when the input surface 60 is composed of lens surfaces, each of which is convex in the plane (s)perpendicular and/or parallel to the direction of arrangement of the light sources 1 are the same color and that 7(a) and (b) shows the case when the input surface 60 is composed of flat surfaces.

In addition, in an effort to better control the degree of parallelism of the light beam that propagates from the surface 61 back reflections to the output surface 62, the illumination system of the present invention is preferably configured so that: the surface of the back reflections 61 solid refractive medium 6 contained surface (which are covered by the metal reflecting mirrors MMS), obtained by deposition of metal films on (i) a flat surface or (n) of the lens surface, each of which is convex or concave at least in one plane, perpendicular and/or parallel to the direction of arrangement of the light sources 1 are the same color, so that beams of light from the input surface of the solid refractive medium deviated in the metal reflection on what usesto parallel to each other in the plane parallel to the direction of arrangement of the light sources 1 are the same color.

It should be borne in mind that in Fig.6 and Fig.7(a) and (b) shows an example of a configuration in which the surface 61 of the reverse reflection contains the surface (which corresponds covered by the metal reflecting mirrors MMS), obtained by deposition of metal films on (i) a flat surface or (ii) of the lens surface, each of which is convex or concave in at least one plane parallel to the direction of arrangement of the light sources 1 are the same color, so that light beams from the input surface 60 solid refractive medium 6 deviated in the metal reflection essentially parallel each other in a plane parallel to the direction of arrangement of the light sources 1 are the same color.

In addition, the illumination system of the present invention is obtained by adding Converter 3V polarization as an integral element of the optical system 3 to form images in any lighting systems in Fig.6 and Fig.7(a) and (b), for example, as shown in Fig. Converter 3V polarization formed in the optical path extending from the input surface 60 solid refractive medium 6 through the interior of the solid phase refractive cf the water 6 to the surface 61 of the reverse reflection solid refractive medium 6, contains the element 30, which transmits the specific polarized light beam and reflects the remaining light beam, and a half-wave plate 31, on top of which is attached to the element 30. This provides a mounting structure that is suitable for the case where the inverter 6A polarization is used in the method of the return beam. Using Converter 3V polarization allows only specific terms of the light beam to enter the array of microlenses 3A. Therefore, in the case when the array of pixels is formed using a liquid crystal element, the polarizer facing the entrance of the liquid crystal element is set so that could be skipped specifically polarized light beam. It almost completely eliminates the absorption of light by the polarizer, thereby, improves the light utilization efficiency.

The increase of the area covered by a single illumination system, a proportional way leads to the increase of the distance (thickness) from each light source to the array of pixels. On the contrary, to reduce the thickness of the illumination system can be achieved by reducing the area covered by one system of illumination, and lighting one of the array of pixels (one full screen) multiple systems pods the weave that allows you to form a thin backlight system. This is achieved by using the illumination system in a single unit of illumination and the location of several such units, running parallel to each other. However, increasing the number of blocks of a backlight used for an array of pixels, leads to an increase in the number of components and, consequently, to the increase in the cost of production. Therefore, it should be observed trade-off between production cost and thickness.

In addition, the illumination system of the present invention is preferably performed so that it contained the control means to control the amount of light from the light sources for each one unit of illumination or for every two or more blocks of the backlight, running parallel to each other, and these tools should be designed for easy change of brightness in different places within a single full screen.

In addition, in the example embodiment of the invention, where the blocks of the backlight are parallel to each other, preferably, in order to reduce production costs and eliminate operations orientation to the blocks of the backlight jointly used combined optical system for forming an image instead of having multiple optical systems is it for image formation, respectively.

In an ideal embodiment, the illumination system combined optical system for forming an image as great as the only full screen. However, in real production, you need to apply only such a combined option, which is regarded as the most suitable from the viewpoint of production cost, the number of operations, Assembly parts, etc

The following describes a liquid crystal display device according to the present invention. The liquid crystal display device of the present invention is a liquid crystal display device with the above-described backlight system and, for example, is such a liquid crystal display device, shown in Figure 10.

The liquid crystal display device according to the present invention is a liquid crystal display device, comprising: a liquid crystal element 9, is obtained by placing the liquid crystal layer 40 between the inlet of the glass substrate 41 and the output of the glass substrate 42, and the liquid crystal layer 40 forms the array of pixels; a control element 43, which is placed between the liquid crystal layer 40 and the output of the glass substrate, to control the liquid crystal element 9; a polarizer 44, whic is its input on the glass substrate 41 of the LCD element 9; the analyzer 45, located at the exit of the glass substrate 42 LCD element 9; and the scattering film 46 located on the output surface analyzer 45, and the liquid crystal element 9, the control element 43, the polarizer 44, the analyzer 45 and scattering film 46 located on the side facing the output surface of the array of microlenses 3A. (The order in which these components are attached on top of the previous component, is as follows: "the polarizer / input glass substrate / liquid crystal layer / control / output glass substrate / analyzer / scattering film".)

The beam of light from each source 1 of light is included in the array of microlenses 3A, passes through the polarizer 44 and the input of a glass substrate 41, to focus on the display element of the liquid crystal layer 40, passes through the output of the glass substrate 42 and the analyzer 45 to dissipate on the scattering film 46, and exits. It should be borne in mind that since the control element 43 is located on the boundary between the pixels of the liquid crystal layer 40, the control element 43 does not affect passing through the pixels of the light beams.

In addition, the same effects can also be obtained by joining the liquid crystal layer 40, the polarizer 44 and input the second glass substrate 41 on the top of each of the previous element in the specified order, starting from the liquid crystal layer 40 in the direction of the input side of the liquid crystal display device, shown in Figure 10, instead of joining the liquid crystal layer 40, the input of the glass substrate 41 and the polarizer 44" at the top of each previous element in this order from the liquid crystal layer 40 in the direction of the input side. Alternatively, the same effects can also be obtained by joining the liquid crystal layer 40, the control element 43, analyzer 45, the output of the glass substrate 42 and the scattering film 46 on the top of each previous element in this order from the liquid crystal layer 40 in the direction of the input side of the liquid crystal display device, shown in Figure 10, instead of attaching "control element 43, analyzer 45, the output of the glass substrate 42 and the scattering film 46 on the top of each previous element in this order from the liquid crystal layer 40 in the direction of the input side.

Furthermore, since the liquid crystal display device, shown in Figure 10, the output of the glass substrate 42 is located between the liquid crystal layer 40 and the analyzer 45, depending on the thickness of the output of the glass substrate 4 may be a situation when the light beams passing through adjacent display elements and reaching the analyzer 45, superimpose on each other, so there is a concern that overlapping beams of light will be scattered scattering film 45, which may lead to deterioration of image quality.

To prevent such deterioration of image quality, it is preferable to add the liquid crystal layer 40, the control element 43, the analyzer 45, scattering film 46 and the output of the glass substrate 42" on top of each previous element in this order from the liquid crystal layer 40 in the direction of the input side of the liquid crystal display device, shown in Figure 10, instead add the liquid crystal layer 40, the control element 43, the output of the glass substrate exit 42, the analyzer 45, and the scattering film 46 on the top of each previous element in this order from the liquid crystal layer 40 in the direction to the input side.

In addition, in the case when preserving the polarization state of the scattering film (for example, the scattering film which diffuses the light with total reflection inside the boundary layer with a certain refractive index) is used as the scattering film 46, the same effects can is also available in the embodiment, the liquid crystal display device, where the scattering film 46 replace this preserves the polarization state of the scattering film, and the position of the scattering film change so that the scattering film was placed between the control element 43 and the output of the glass substrate 42.

In addition, the same effects can also be obtained by joining the liquid crystal layer 40, the control element 43, which preserves the polarization state of the scattering film analyzer 45 and the output of the glass substrate 42 or the liquid crystal layer 40, the control element 43, the output of the glass substrate 42, which preserves the polarization state of the scattering film and analyzer 45" on top of each previous element in this order from the liquid crystal layer 40 in the direction to the output side of the liquid crystal display device, shown in Figure 10, instead of joining the liquid crystal layer 40, the control element 43, which preserves the polarization state of the scattering film, the output of the glass substrate 42 and analyzer 45" on top of each previous element in this order from the liquid crystal layer 40 in the direction of the output side.

It should be borne in mind that the use of the scattering film with some form surface, as receivals the film 46 in the liquid crystal display device, preferably, because of the scattering film with some form of surface smaller in comparison with other types of scattering film thickness to provide an overview of the scattering in the form of a rectangular cylinder.

In addition, in the case when the scattering film 46 and preserving the polarization state of the scattering film has independent of the angle of incidence of the characteristic scattering (when regardless of the angle of incidence of the incident light that enters the scattering film, the intensity distribution of the light scattering during the passage of light through the scattering film constantly), the beams of light passing through the display elements, in which each pixel of the liquid crystal display was spatially divided according to the color, have similar characteristics scattering. This is preferable, since this will likely be achieved by improving the quality of the image.

In addition, to achieve higher image quality preferred this configuration of the liquid crystal display device, when the distance from the liquid crystal layer 40 to the scattering film 46 or to preserve the state of polarization of the scattering film is essentially defined by the expression C=b/m, where m is the number of light sources, the light from which is intoonly displays item (in this example, m=3) a b equals the distance from the array of microlenses 3A to the liquid crystal layer 40. It should be borne in mind that even more preferably to satisfy the inequality with<b/(3×m). It seems that in this case there is no overlapping of light between those areas in the plane of scattering film 46, which correspond to all of the display elements constituting the liquid crystal pixels that are likely to further improve image quality. However, in the case when s<<b/m, there is a big dark area between areas in the plane of scattering film 46, which correspond to all of the display elements constituting the liquid crystal pixels, and in the case when C>b/m, you receive the imposition of light between those areas in the plane of scattering film 46, which correspond to the display elements of the same color. In any of these cases, the image quality enhancement is unlikely.

The liquid crystal display device according to the present invention produced with the production of the desired optical components and assemblies of these optical components. However, due to variances in the manufacturing process of the optical components can be produced in the project, and hence, may not be collected. In addition, if we consider production costs, it is necessary to produce optical components with large is whether smaller deviations in shape from the project. Because of these problems a situation may arise when it is difficult to focus only beams of light corresponding to display elements of the liquid crystal layer, comprising an array of pixels. In this case, the worst option would be the deterioration of the display quality. To avoid this situation, the present invention does not preclude the use of a layer of the color filter. Therefore, it is possible to use such an implementation option the liquid crystal display device, which further contains a color filter layer formed between the input glass substrate and output a glass substrate. However, the use of a layer of the color filter leads to loss of light, since the transmittance is about 90% even at those wavelengths where the light passes. Therefore, it is always better to avoid using a layer of the color filter.

In addition, in the present invention it is possible to use this embodiment, the liquid crystal display device, when the position of the array of microlenses on the illumination system is changed so that the array of microlenses was placed between the polarizer and the input glass substrate. A variant of this embodiment of the invention shown in Fig. This example is illustrative of the case where the position of the mass is VA microlenses 3A modified to an array of microlenses 3A was placed between the polarizer 44 and input the glass substrate 41.

This allows the manufacture of an optical system for image formation during the process of manufacturing the liquid crystal element including operation orientation of the optical system for forming an image with respect to the liquid crystal element 25, which thus gives the advantage that there is no need to perform an operation orientation of the optical system for forming an image with respect to the liquid crystal display device (liquid crystal panel) after production, at the same time as this operation is necessary when the optical system for forming an image is performed separately from the liquid crystal element.

The following describes the operation of forming on a glass substrate of the array of microlenses (type lens "eye of the fry" or lenticular lens), conducted in the framework of the method of manufacturing a liquid crystal display device of this example embodiment of the invention.

First cured under ultraviolet light, the resin applied to the surface of the glass substrate by way of centrifugation or immersion. Then opaque mask is placed in an imaginary plane parallel to the surface, at a predetermined distance from plane to plane. While it is preferable that the opaque mask was placed so that the part to be formed by an array of microlenses, was illuminated with ultraviolet radiation through the holes. In addition, preferably opaque mask between applied during exposure of the light source and the glass substrate. When illuminated opaque mask with ultraviolet radiation used for the exposure light source, in this position, the portion deposited on the glass substrate is cured by ultraviolet radiation, the resin will be exposed. Then create an array of microlenses by means of showing and removing unexposed parts are cured by ultraviolet radiation resin.

In addition, preferably used are rejected under the action of ultraviolet radiation, the resin did not cause changes in the polarization state. The reason for this is as follows: the formation of a cured under ultraviolet radiation from the resin on the glass substrate means forming optical system for forming an image between the polarizer and the analyzer, and changing the state of polarization of the optical system for forming the zobrazenie contributes to poor quality of the image.

It should be borne in mind that the liquid crystal display device does not detect changes in the characteristics of the display, even if you swap the liquid crystal layer and control. Therefore, the liquid crystal display device obtained by exchanging places with each other, the liquid crystal layer and control in the above-mentioned liquid crystal display device, also falls in the scope of the present invention.

[Example]

Below are the results specifically tested using examples and comparative examples. However, the present invention should not be limited solely to the subsequent examples.

As an example of the present invention, the illumination system in accordance with the embodiment shown in Fig.7(a), was produced by testing. The lighting system consisted of an array of light sources 1, each of which includes three LEDs that radiate R, G, and light on the dominant wavelengths, respectively. When light from a 3×3 blocks of the array of light sources is served along the direction of the depth perpendicular to the plane Fig.7(a), and along the horizontal direction passing through the plane of Fig.7(a), the spatial distribution of brightness of light emitted through the top of the s surface of microlenses, was measured by using a device that measures the homogeneity of the luminance-chrominance (produced by Torso Technohouse Corporation)); UA-1000).

Each of the R, G, and b of the light sources 1 contained a bright dot 10 and system 11 of the focusing lenses. Used bright dot 10 was placed in the enclosure with led mounted inside the led chip. Used system 11 of the focusing lens was made from a substance (with a refractive index approximately equal 1,73), consisting of glass (L-LAM72), and lenses, alternately used for each bright point 10 were double-sided aspherical lens.

The RGB LEDs located along the direction of increasing depth, perpendicular to the plane of Fig.7(a).

Used solid refractive medium 6 was manufactured from material consisting of acrylic resin (refractive index approximately equal to 1.5) with a thickness of about 50 mm, and blocks of solid refractive medium 6 were placed parallel to each other at intervals of 50 mm along the direction of increasing depth, perpendicular to the plane of Fig.7(a) and along the horizontal direction passing through the plane of Fig.7(a).

The input surface 60, the reflective surface 61, the output surface 62 and an output reflective surface 63 solid refractive medium 6 were configured after the ith follows:

- Input surface 60: included lens surface, each of which had a curve in the plane perpendicular to the plane parallel to the direction of arrangement of the light sources 1 are the same color or a bulge in a plane parallel to this direction. The shape of the input surface of each block was such that the input surface is used for R, G and color, respectively, were the lens surfaces of the same shape and the same shape were arranged parallel to each other for each block BLK of the array of light sources.

- Reflective surface 61: Formed by thin film deposition of aluminum on the surfaces of lenses, each of which has a uniform shape in the plane perpendicular to the direction of arrangement of the light sources 1 are the same color, and is embossed with the shape of the surface, i.e. the combination of convexity and concavity in a plane parallel to the direction of arrangement of the light sources 1 are the same color.

- Output surface 62: there was one (surface S1) of the two surfaces (under the working titles "surface S1 and surface S2"), among which is the angle at the vertex of a single prism (angle at the vertex=60°, W=about 200 μm)serving as a single element of the array of prisms.

- Output reflective on Ernest 63: Formed by deposition of a thin film of aluminum on the other surface (surface S2) of the two surfaces (surface S1, the surface S2).

Used an array of microlenses 3A was an array of lenses obtained by such processing of the material (refractive index=about 1,52) 2.5 mm thick, consisting of glass produced by SCHOTT", V)to each microlens, serving as a single item, had essentially the same focal length, approximately equal to 1.8 mm, and essentially the same width approximately equal to 600 μm.

An array of 4 pixels configured so that the display elements corresponding to each of the colors RGB LEDs and has a size approximately equal to 200 μm, were placed one by one at intervals approximately equal to 600 μm. However, when measuring the spatial intensity distribution, the scattering plate was placed instead of an array of 4 pixels on the output surface of the array of microlenses 3A, which, as expected, shall be placed in an array of 4 pixels.

On Fig shows the result obtained by averaging the spatial distribution of chromaticity coordinates along the direction perpendicular to the direction along which built RGB LEDs. The spatial distribution of chromaticity coordinates were measured using an instrument for measuring the uniformity of color. Fig shows that since the coordinates of the color of the spine indicate coordinate values R, G and At intervals approximately equal to 200 μm, the light beams from the LEDs, emitting R, G and light on the dominant wavelengths, separately focus on display items that match the colors of the RGB LEDs of the array of pixels, respectively.

In addition, Fig shows a chromaticity diagram representing the spectral characteristic of the light beams passing through the area near the centers of the pixel elements corresponding to the colors RGB LEDs, respectively, as indicated by the dotted line on Fig. Fig also shows that the beams of light passing through the display elements corresponding to the colors RGB LEDs, separated from each other in colors R, G and b, respectively.

Illumination system according to the present invention includes: a light-emitting part containing a light sources that emit light beams to differ from each other dominant wavelengths; and an optical system for forming an image containing a microlens made with the possibility of focusing the light beams emitted from the light emitting part, and a system for the illumination made with the possibility of lighting the liquid crystal panel, the light beams passing through the optical system for forming an image, the liquid crystal panel includes pixels that are separated from each other, varicella particular step and each of which contains display elements corresponding to each color, provided that the amount by which the pixels are separated from each other, denoted as R, the optical system for forming an image has image magnification (1/n), the light sources are separated from each other by a step P1defined as P1=n × R, and the microlenses are separated from each other by a step P2defined as P2=(n/(n+1)) × R.

The illumination system according to the present invention is performed in such a way that the optical system for forming an image includes a lens made with the ability to change the direction of the optical path through (i) the shape of the lens surface and / or distribution of refractive index within the lens.

The illumination system according to the present invention is performed in such a way that the optical system for forming an image contains (i) a compound lens, (ii) a biconvex lens, or (iii) a combination of the compound and lenticular lenses.

The illumination system according to the present invention is performed so that the light emitting part was the light-emitting device containing one type or two types or more types of light sources (led), a laser light source or an organic electroluminescent light source is a, or a light-emitting device containing the light source and the light guide.

The illumination system according to the present invention is performed so that the led light source was an led lamp containing the led chip and the focusing lens system configured to focus the beam of light from the led chip, or an organic electroluminescent light source was organic electroluminescent lamp containing organic electroluminescent light-emitting part and the focusing lens system configured to focus the beam of light from the organic electroluminescent light-emitting part.

The illumination system according to the present invention is performed so that the light emitting part and an optical system for forming images were divided into multiple blocks; and the optical axis of the light sources in the light-emitting parts were rotated so that the light beams emitted from the light-emitting blocks parts are essentially the same entered in the appropriate blocks of the optical system for forming an image, respectively.

The illumination system according to the present invention carry out so that it additionally contained a Converter for converting the polarization state, which is Braden to the input-side optical system for forming an image and which contains (i) the element which ignores the specific polarized light beam and reflects the remaining light beam and (ii) the half-wave plate, the top of which is added the specified element.

The illumination system according to the present invention carry out so that it additionally contained flat mirror is configured to reflect the beam of light emitted from the transducer of the polarization state, and to allow the light beam to enter the optical system for forming an image.

The illumination system according to the present invention carry out so that it additionally contained: collimating reflective mirror configured to reflect the beam of light emitted from the transducer of the polarization state, and to turn the light beam in a substantially parallel beam; and a fully reflecting prismatic panel, which is made with the ability to fully reflect the beam of light emitted from the collimating reflective mirrors, and to allow the light beam to enter the optical system for forming an image, where each light source is placed in a region, being located near a position nonaxisymmetric focus collimating reflective lenses.

The illumination system according to the present invention carry out so that it is additional the but contained solid refractive medium, contains a Converter for converting the polarization state, where the solid refractive medium has a portion, which contains a Converter for converting the state of polarization, and this part has an isosceles triangular cross-section, of an isosceles part of which is totally reflected light beam from the transmitter polarization; and each of the light sources emits a light beam, which enters the solid refractive medium and which is reflected isosceles part, forming one of the points of the imaginary image, which are arranged in increments of n × R from each other.

The illumination system according to the present invention carry out so that it additionally contained: solid refractive medium, allowing for entrance of the light beam from each light source through the input surface, the possibility of metallic reflection light beam from the surface of the back reflections solid refractive medium, and the output light beam from the solid refractive medium through its output surface; an optical plate, providing input beam of light emitted from the solid refractive medium through the output surface of this solid refractive medium in the optical plate through its input surface is th the possibility of reflection of the beam of light from the surface of the optical plate, and the output light beam from the optical plate through its output surface 7 in the direction of the optical system for forming an image; and a matching element for matching the refractive indices, filling the space between the solid refractive medium and an optical plate, where: the entrance surface of a solid refractive medium contains parallel spaced region identical in shape, corresponding to each individual unit light-emitting part, and the surface of back reflections solid refractive medium contains parallel spaced reflective mirrors with identical shape with a metallic coating, corresponding to each individual unit light-emitting part and serving to reflect light beams from the input surface, an output surface of the solid refractive medium 6 has a flat shape; and the entrance surface of the optical plate is one of the two surfaces, among which is the angle at the vertex of the prism prismatic panel, the reflective surface of the optical plate is a surface obtained by coating the other of the two surfaces of the metal film, and the output surface of the optical plate has the flat shape; and the specified matching element for matching the refractive indices has an input surface and the output surface, consisting in contact respectively with the output surface of the solid refractive medium and the input surface of the optical plate.

The illumination system according to the present invention carry out so that it additionally contained a solid refractive medium, allowing for entrance of the light beam from each light source through the input surface, the possibility of metallic reflection of the light beam by the surface of the back reflections solid refractive medium, the output light beam from the solid refractive medium through the output surface of this solid refractive medium, the possibility of metallic reflection of the light beam by the surface of the back reflections solid refractive medium, and the output light beam in the direction of the optical system for forming an image, where: the entrance surface of a solid refractive medium 6 includes parallel spaced region identical forms corresponding to each individual unit light-emitting part and the surface of the back reflections solid refractive medium contains parallel spaced reflective mirror is identical to the form with a metallic coating, corresponding to each individual unit light-emitting part, and these reflective metal coated mirror serving to reflect light beams from the input surface and the output surface of the solid refractive medium is one of the two surfaces, among which is the angle at the vertex of the prism, and an output reflective surface of the solid refractive medium is a surface obtained by coating the other of the two surfaces of the metal film.

The illumination system according to the present invention carry out so that it additionally contained: optical plate, which causes the beam of light emitted from the solid refractive medium through the output surface of the solid refractive medium to enter the optical plate through the entrance surface of the optical plate and causes the light beam out of the optical plate through the output surface of the optical plate 7 in the direction of the optical system for forming an image; and a matching element for matching the refractive indices, filling the space between the solid refractive medium and an optical plate, where the input surface and the output surface of the optical plate are flat and essentially parallel to each other; moreover, glassy element for matching the refractive indices contains the input surface and the output surface, in contact with the output surface of the solid refractive medium and the input surface of the optical plate, respectively; and the matching element for matching the refractive indices fills the space between the output surface of the solid refractive medium and the input surface of the optical plate.

The illumination system according to the present invention is performed so that the input surface of the solid refractive medium contained (i) a flat surface or (ii) of the lens surface, each of which is convex or concave at least in one plane, perpendicular and/or parallel to the direction of arrangement of the light sources of the same color.

The illumination system according to the present invention is performed so that the surface of the back reflections solid refractive medium contained the surface obtained by coating metallic films: (i) flat surfaces, or (ii) of the lens surfaces, each of which is convex or concave at least in one plane, perpendicular and/or parallel to the direction of arrangement of the light sources of the same color, so that light beams from the input surface of the solid refractive medium deviated due to the metal reflection on beings is parallel to each other in the plane parallel to the direction of arrangement of the light sources of the same color.

The illumination system according to the present invention carry out so that it additionally contained a Converter for converting the polarization state that is installed in the optical path extending from the input surface of the solid refractive medium through the interior of the solid refractive medium to the surface 61 of the reverse reflection solid refractive medium, and a Converter for converting the polarization state passes a specific way polarized light beam and reflects the remaining light beam, and a Converter for converting the polarization state is located on top of the half-wave plate and is connected with it.

Combined illumination system according to the present invention includes the backlight blocks arranged in parallel to each other, each of the blocks of the backlight is a backlight system proposed in any of the above options.

The combined illumination system according to the present invention carry out so that it additionally contained a control means to control the amount of light from the light emitting part (s) for each of the blocks of the backlight or for every two or more of the several blocks of the backlight.

Comb nerosannow the illumination system of the present invention is designed in such a way the optical system for imaging at least one type of these blocks illumination combined with each other so that they correspond to two or more blocks of the backlight.

The liquid crystal display device according to the present invention has the above-described backlight system and liquid crystal display device includes: a liquid crystal element containing a liquid crystal layer and the input and output glass substrate, located respectively on the input side and output side of the light beam, so that the liquid crystal layer placed between them; a control device which controls the liquid crystal element; a polarizer located on the entrance glass substrate of the liquid crystal element; an analyzer located at the exit of the glass substrate of the liquid crystal element; and a diffusing element located at the exit surface of the analyzer, and the liquid crystal element, a control element, a polarizer, analyzer, and the scattering element is arranged on the side facing the surface to the light output of the microlenses.

The liquid crystal display device of the present invention is designed so that the liquid crystal layer, a polarizer and glass input the second substrate are located on top of each other and connected to each other in this order from the liquid crystal layer to the input side.

The liquid crystal display device according to the present invention is performed in such a way that the liquid crystal layer, the control element, the analyzer, the output of the glass substrate and the scattering element is located on top of each other and connected to each other in this order from the liquid crystal layer to the output side.

The liquid crystal display device of the present invention is designed so that the liquid crystal layer, a control element, an analyzer, a dispersive element and the output glass substrate located on top of each other and connected to each other in this order from the liquid crystal layer to the output side.

The liquid crystal display device of the present invention is designed in such a way that it further comprises a dispersing element, ensuring the preservation of the polarization state and located between the control element and the output of the glass substrate.

The liquid crystal display device of the present invention is designed so that the liquid crystal layer, a control element that retains the polarization of the scattering element, the analyzer and the output glass substrate located on top of each other and connected to each other in this order from zhidkokristallicheskogo the layer to the output side.

The liquid crystal display device of the present invention is designed so that the liquid crystal layer, the control element, the output glass substrate, preserving the polarization of the scattering element and the analyzer are arranged on top of each other and connected to each other in this order from the liquid crystal layer to the output side.

The liquid crystal display device according to the present invention is performed in such a way that the scattering element is a dispersion element with surface scattering.

The liquid crystal display device according to the present invention is performed in such a way that the scattering element further has independent of the angle of incidence of the characteristic scattering.

The liquid crystal display device according to the present invention is performed in such a way that the distance from the liquid crystal layer before diffusing element, or to preserve the polarization of the scattering element is specified as<b/m, where m is the number of light sources, the light from which is included in one display element, a b is equal to the distance from each of the microlenses to the liquid crystal layer.

The liquid crystal display device according to the present invention carry out so that it additionally contained a layer CEE the new filter, formed between the input glass substrate and output a glass substrate.

The liquid crystal display device according to the present invention is performed so that the optical system for forming an image located between the polarizer and the input glass substrate.

The liquid crystal display device according to the present invention is performed in such a way that the liquid crystal element and the control element is rotated.

Industrial applicability

The present invention can be applied to liquid crystal display devices containing lights, etc.

The list of symbols

1, the light Source

1A Effective bright point (virtual image of a bright point 10 of the focusing lens system 11)

1B, the imaginary Point image (dot imaginary image that appears when light that enters the solid refractive medium 6 from the effective bright point 1A, is totally reflected isosceles part)

2, the Optical axis of the light source

3 Optical system for forming an image

3A, the Array of microlenses

3A Microlens

3V Converter for converting the polarization state

3C is a Flat mirror

3D Collimating reflective mirror

3E showing prismatica the Kaya panel

4 Array of pixels

5 Pixel

6 Solid refractive medium (for example, acrylic resin)

6A Part, which contains a Converter for converting the state of polarization of 3C (the part in the form of an isosceles triangle)

7 Optical plate

7A Optical plate

8 the matching element for matching the refractive indices

9 LCD

10 Bright point (for example, led crystal or organic electroluminescent light-emitting part)

11 focusing lens system

12 light-Emitting device

13, the light guide

14 (Pseudo-)light source

15 Auxiliary elements of the light source

21 Arrow (arrow indicating the direction in which rotates the optical axis of the light source)

30 Element permeable to specific polarized light beam and reflects the remaining light beam

31 half-wave plate

40 liquid crystal layer

41 Glass substrate (front glass substrate)

42 Glass substrate (output glass substrate)

43 control

44 Polarizer

45 Analyzer

46 Scattering film

50 Frame rear surface

51 Column

50 Input surface

61 the surface of the back reflection

62 the output surface

63 Outputs the Naya reflective surface

70 Input surface

71 Reflective surface

72 the output surface

80 Input surface

81 the output surface

BLK Block

MMS is Covered by the metal reflective mirror

PRMS prismatic panel

1. System for illumination, comprising:
the light emitting part containing a light source, configured to radiation light beams on different dominant wavelengths; and
an optical system for forming an image containing a microlens made with the possibility of focusing the light beams emitted from the light emitting part, and
system for illumination made with the possibility of lighting the liquid crystal panel, the light beams passing through the optical system to form images,
the LCD panel includes pixels that are separated from each other at a predetermined pitch and each of which contains display elements corresponding to each color,
and provided that the amount by which the pixels are separated from each other, denoted by P and the optical system for forming an image has a coefficient of (1/n) larger image, the light sources are separated from each other by a step P1defined as P1=n×R, and the microlenses are separated from each other by a step P2defined as P2=(n(n+1))×R.

2. The system according to claim 1, in which the optical system for forming an image includes a lens configured to change the direction of the optical path through (i) forms the surface or (ii) the distribution of refractive index in the lens.

3. The system according to claim 2, in which the optical system for forming an image contains (i) a compound lens, (ii) a biconvex lens, or (iii) a combination of the compound and lenticular lenses.

4. System according to any one of claims 1 to 3, in which the light emitting part is a light-emitting device containing one type, two types or more types of led light sources, laser light sources or organic electroluminescent light sources, or light-emitting device containing the light source and the light guide.

5. The system according to claim 4, in which
the led light source is an led lamp, containing the led chip and the focusing lens system configured to focus the beam of light from the led chip, or
organic electroluminescent light source is an organic electroluminescent lamp containing organic electroluminescent light-emitting part and the focusing lens system configured to focus the light beam from the PR is onicescu electroluminescent light-emitting part.

6. System according to any one of claims 1, 2, 3, and 5, in which:
the light emitting part and an optical system for forming an image is divided into blocks; and
the optical axis of the light sources are light-emitting part is rotated so that the light beams emitted from the light-emitting blocks parts are essentially the same, respectively, are included in the respective blocks of the optical system for forming an image.

7. System according to any one of claims 1, 2, 3, 5, additionally containing a Converter for converting the state of polarization inverted to the input-side optical system for forming an image containing
(i) an element permeable to specific polarized light beam and reflects the remaining light beam, and
(ii) a half-wave plate, to the upper part of which is attached to the specified element.

8. The system according to claim 7, further containing a flat mirror is arranged to reflect the beam of light emitted from the specified Converter, with the provision of the specified input light beam into the optical system for forming an image.

9. The system according to claim 7, further comprising:
collimating reflective mirror configured to reflect the beam of light emitted from the specified Converter, and with the possibility of conversion of the light beam from the society into a parallel beam; and
fully reflective prismatic panel executed with full reflection of the light beam emerging from the collimating reflective mirrors, and with the possibility of entrance of the light beam in the optical system for forming an image, and
each light source is in the field essentially near nonaxisymmetric focus collimating reflective lenses.

10. The system according to claim 7, further containing solid refractive medium containing the specified Converter, and
solid refractive medium has a part that contains the specified Converter and having an isosceles triangular cross-section, of an isosceles part of which is made with the possibility of total reflection of the light beam from the transducer, and
each of light sources configured to emit the beam of light that enters the solid refractive medium and reflected isosceles part with the formation of one of the points of the imaginary image located increments n×R from each other.

11. System according to any one of items 1, 2, 3, 5, additionally containing:
solid refractive medium, allowing for entrance of the light beam from each light source through the input surface, the possibility of metallic reflection of the light beam by the surface treatment is aqueous reflect solid refractive medium and the output light beam from the solid refractive medium through its output surface;
the optical plate, providing input beam of light emitted from the solid refractive medium through the output surface of this solid refractive medium in the optical plate through its input surface, the possibility of reflection of the light beam from the reflecting surface of the optical plate and the output light beam from the optical plate through its output surface in the direction of the optical system for forming an image; and
the matching element for matching the refractive indices, filling the space between the solid refractive medium and an optical plate, and
the entrance surface of a solid refractive medium contains parallel spaced region identical in shape, corresponding to each individual unit light-emitting part, the surface of the back reflections solid refractive medium contains parallel spaced reflective mirrors with identical shape with a metallic coating, corresponding to each individual unit light-emitting part
and serving to reflect light beams from the input surface, an output surface of the solid refractive medium has a flat shape;
the entrance surface of the optical plate is one of the two surfaces between which is located at the ol at the apex of the prism prismatic panels
the reflective surface of the optical plate is a surface obtained by coating the other of the two surfaces of the metal film, the output surface of the optical plate has a flat shape; and
the specified impedance element has an input surface and the output surface, consisting in contact respectively with the output surface of the solid refractive medium and the input surface of the optical plate.

12. System according to any one of items 1, 2, 3, 5, additionally containing solid refractive medium, allowing for entrance of the light beam from each light source through the input surface, the possibility of metallic reflection of the light beam by the surface of the back reflections solid refractive medium, the output light beam from the solid refractive medium through its output surface, the possibility of re-metallic reflection of the light beam output reflective surface of the solid refractive medium and the output light beam in the direction of the optical system for forming an image, and
the entrance surface of a solid refractive medium contains parallel spaced region identical in shape, corresponding to each individual unit light-emitting part,
the surface of the military reflect solid refractive medium contains parallel spaced reflective mirrors with identical shape with a metallic coating, corresponding to each individual unit light-emitting part and serving to reflect the light beams input surface;
the output surface of the solid refractive medium is one of the two surfaces, among which is the angle at the vertex of the prism, and
the output reflective surface of the solid refractive medium is a surface obtained by coating the other of the two surfaces of the metal film.

13. The system of item 12, further comprising:
the optical plate, providing input beam of light emitted from the solid refractive medium through the output surface of this solid refractive medium in the optical plate through its input surface and the output light beam from the optical plate through its output surface in the direction of the optical system for forming an image; and
the matching element for matching the refractive indices, filling the space between the solid refractive medium and an optical plate, and
the input surface and the output surface of the optical plate are flat and essentially parallel to each other;
the matching element contains the input surface and the output surface, consisting in contact respectively with output the second surface of the solid refractive medium and the input surface of the optical plate, and
fills the space between the output surface of the solid refractive medium and the input surface of the optical plate.

14. The system of item 13, in which the entrance surface of a solid refractive medium contains (i) a flat surface or (ii) of the lens surface, each of which is convex or concave at least in one plane, perpendicular and/or parallel to the direction where the light sources of the same color.

15. System according to any one of p-14, in which the surface of the back reflections solid refractive medium contains the surface obtained by coating a metal film (i) of flat surfaces or (ii) of the lens surfaces, each of which is convex or concave at least in one plane, perpendicular and/or parallel to the direction where the light sources of the same color, so
possible deviations of the beams of light coming from the entrance surface of the solid refractive medium by metallic reflection essentially parallel to each other in a plane parallel to the direction where the light sources of the same color.

16. System according to any one of p-14, optionally containing Converter polarization, which set the priority on the optical path, passing from the entrance surface of the solid refractive medium through the interior of the solid refractive medium to the surface of the back reflections solid refractive medium which transmits the specific polarized image light beam, and reflects the remaining light beam, is located on the half-wave plate and is connected with it.

17. Combined system for illumination, containing blocks of the backlight are parallel to each other, each of the blocks of the backlight system according to any one of claims 1 to 16.

18. System 17, additionally containing control means for controlling the amount of light from the light emitting part (s) for each block of the backlight or for every two or more blocks of the backlight.

19. System 17 or 18, in which the optical system for imaging at least one type of these blocks illumination combined with each other so that they correspond to two or more blocks of the backlight.

20. The liquid crystal display device containing the system for a backlight according to any one of claims 1 to 16 or a combined system for illumination according to any one of PP-19, and the liquid crystal display device includes:
the liquid crystal element containing a liquid crystal layer and the input and output under glass is Oki, located respectively on the input side and output side of the light beam with the location of the liquid crystal layer in between;
a control element configured to control the liquid crystal element;
the polarizer located on the entrance glass substrate of the liquid crystal element;
the analyzer is located on the output glass substrate of the liquid crystal element; and
the scattering element located at the exit surface of the analyzer, and
the liquid crystal element, the control element, the polarizer, the analyzer and the scattering element is arranged on the side facing the surface to the light output of the microlenses.

21. The liquid crystal display device according to claim 20, in which the liquid crystal layer, the polarizer and the input glass substrate located on top of each other and connected to each other in this order from the liquid crystal layer to the input side.

22. The liquid crystal display device according to claim 20 or 21, in which the liquid crystal layer, the control element, the analyzer, the output of the glass substrate and the scattering element is located on top of each other and connected to each other in this order from the liquid crystal layer to the output side.

23. The liquid crystal display device is the primary objective in claim 20 or 21, in which the liquid crystal layer, a control element, an analyzer, a dispersive element and the output glass substrate located on top of each other and connected to each other in this order from the liquid crystal layer to the output side.

24. The liquid crystal display device according to claim 20 or 21, further containing a dispersing element, ensuring the preservation of the polarization state and located between the control element and the output of the glass substrate.

25. The liquid crystal display device according to paragraph 24, in which the liquid crystal layer, the control element, the scattering element, ensuring the preservation of the polarization state analyzer and output glass substrate located on top of each other and connected to each other in this order from the liquid crystal layer to the output side.

26. The liquid crystal display device according to paragraph 24, in which the liquid crystal layer, the control element, the output of the glass substrate, the scattering element, ensuring the preservation of the polarization state, and the analyzer are arranged on top of each other and connected to each other in this order from the liquid crystal layer to the output side.

27. The liquid crystal display device according to any one of p, 21, in which the scattering element, ensure equauy maintaining the polarization state, is the scattering element with surface scattering.

28. The liquid crystal display device according to any one of p, 21, 25, 26, in which the scattering element further has the characteristic scattering, independent of the incidence angle.

29. The liquid crystal display device according to any one of p, 21, 25, 26, in which the distance from the liquid crystal layer to the scattering element or to the scattering element, ensuring the conservation of the state of polarization, defined as≤b/m, where m is the number of light sources, the light from which is included in one display element, a b - the distance from each of the microlenses to the liquid crystal layer.

30. The liquid crystal display device according to any one of p, 21, 25, 26, optionally containing a color filter layer located between the input glass substrate and output a glass substrate.

31. The liquid crystal display device according to claim 20, in which the optical system for forming an image located between the polarizer and the input glass substrate.

32. The liquid crystal display device according to any one of p, 21, 25, 26, 31 in which the liquid crystal element and the control element are reversed.



 

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23 cl, 10 dwg

FIELD: electricity.

SUBSTANCE: backlighting unit (49) for a display device (69) equipped with a liquid crystal display panel (59) comprises a base (41), a diffusing plate (43), supported by means of the base, and point sources of light, supported by means of mounting substrates (21), provided on the base. Point sources of light contain modules of light emission (MJ). Mounting substrates are arranged in the rectangular area (41a) suitable for location of mounting substrates in it and arranged on the base. Gaps at the borders between mounting substrates do not stretch in any direction along long sides and/or in direction along short sides of the rectangular area, in order to provide for the possibility to see the rectangular area from the edge to the edge.

EFFECT: achievement of homogeneity of reflection ratio.

16 cl

FIELD: electricity.

SUBSTANCE: invention relates to the field of lighting equipment. A highlighting unit 12 consists of a LED 17, a chassis 14 including a base plate 14a mounted at the side opposite to the side of the light output in regard to the LED 17, at that the chassis 14 contains the LED 17 and the first reflective sheet 22 that reflects light. The first reflective sheet 22 includes a four-sided base 24 running along the base plate 14a and two elevated portions 25 and 26, each of these portions is elevated from each of two adjacent sides of the base 24 in direction of the light output. There is a junction J between two adjacent side edges 25a and 26b of the elevated portions 25 and 26. In the highlighting unit 12 the side edge 25a of the first elevated portion 25 out of the two elevated portions 25 and 26 has a face piece 28 faced to the side edge 26a of the elevated portion 26 in the same direction in which the first elevated part 25 is elevated from the base 24 outside towards axis Y, and the first elevated part 25 and the face piece 28 are extruded towards direction of the light output.

EFFECT: elimination of uneven brightness.

22 cl, 29 dwg

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