Backlighting device, display device and tv set

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.

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The technical field

The present invention relates to an illumination device, display device including the illumination device, and to a television receiver including the display device.

The level of technology

A display device using self not luminous display panel such as, for example, a liquid crystal display panel, typically include an illumination device for illuminating the display panel from behind. The light sources of various types, such as a tube with a cold cathode and the light emission elements are used as light sources of the illumination device of this type. Examples of the light emission elements include light emitting diode (LED), organic electroluminescent element, an inorganic electroluminescent element and so on, among which are now commonly used led. The illumination device described in patent literature 1 also uses LEDs as light sources.

In the illumination device described in patent literature 1, as shown in Fig. 12, the led 122 is mounted on the mounting substrate 121, and an additional lens 124 is attached to the mounting substrate 121 to cover the led 122. Mounting substrate 121, the led 122 and the lens 124 together form a module mj light radiation. B is lsoe number of modules mj of light emission is in the form of a matrix, to form a planar light source.

In the illumination device described in patent literature 1, it hosts a large number of point light sources. On the other hand, a large number of linear light sources, such as a tube with cold cathode placed in the illumination device described in patent literature 2. In cases in which, as in these two examples, the illumination device formed by placing multiple light sources included in the display device, if the light from the light sources directly included in the illumination device, this leads to uneven brightness of the display surface. To prevent such uneven brightness between the light sources and the display device is a diffuser plate to diffuse light. The scattering plate described in patent literature 2, is typically created as part of the illumination device.

In some cases, when using the planar light source formed by placing a large number of point sources of light must be illuminated a large area, it may be necessary to have a multitude of mounting substrates, each of which supports multiple point light sources. An example of such a case is disclosed in patent LEATER is round 3.

A list of quotations

Patent literature

Patent literature 1: JP-A-2008-41546

Patent literature 2: JP-A-2005-19065

Patent literature 3: JP-A-2006-301209

The invention

Technical problem

Many of mounting substrates that support a point light source, have a reflective sheet attached to their surface, for higher reflectivity. If the reflective sheet size of the mounting substrate is attached to the mounting substrate, between the mounting substrate and other parts there are significant differences of the reflection coefficient, and this can lead to the next problem.

The boundaries between the mounting substrates, in other words, the gaps formed at the boundaries between the mounting substrates, although depending on their width, are perceived as shadows when you look outside on a scattering plate. This problem will be described with reference to Fig. 13 and 14.

Fig. 13 shows the mounting substrate 101, each of which supports multiple point sources 102 light, such as LEDs. The mounting substrate 101 is rectangular, elongated in the lateral direction, and point sources of light 102 are arranged in a matrix of 4 rows and 11 columns on each of the mounting substrate 101. The mounting substrate 101 are arranged in 4 rows and 2 columns, so that pax is to form a rectangular planar light source, which includes point sources of light 102, located in a total of 16 rows and 22 columns.

Fig. 14 shows the scattering plate 103, illuminated planar light source. The figure illustrates the state in which the gaps at the boundaries between the mounting substrates 101 appear as shadows s Intervals at the boundaries between the mounting substrates 101 are aligned right, forming a figure, like a chess Board, and thus, the shadow's tend to be long and not visible.

In the illumination device described in patent literature 3, as shown in Fig. 15, the mounting substrate 101 in the form of a strip has a point-source light 102 located on it in a row, and three mounting substrate 101 sequentially arranged in series, and a variety of mounting substrate 101 is thus to form a planar light source. Each series is composed of three mounting substrate 101, offset from each other, resulting in gaps at the boundaries between the mounting substrates 101 form a zigzag or staggered pattern, and thus, even if the shadow S, shown in Fig. 14 appear in the scattering plate 103, they will not be so long as to be undesirable visible.

However, in the illumination device of patent literature 3, the ends of the mounting mean the ZHEK 101 are not aligned, and, thus, point sources of light 102 are less dense at the edges of the planar light source. In this configuration, as shown in Fig. 16, the shadow S1, the resulting lack of light, appear at the edges of the scattering plate 103. The attempt to hide the shadow of S1 by covering their bodies in the shape of a frame in an electronic device including the illumination device, would require frame was broad, allowing a more narrow scope, the desired configuration of the electronic device.

The present invention was made in view of the above, and the present invention is that the illumination device, which includes the scattering plate, a base which supports the diffusing plate and the light source, which is formed from a variety of mounting substrates, each of which supports multiple point light sources to prevent undesirable significant gaps at the boundaries between the mounting substrates.

Solution

In accordance with the preferred embodiment of the present invention, the illumination device includes: a scattering plate; a base which supports the scattering plate; and a light source, which is formed from a variety of mounting substrates, each of the C which supports multiple point light sources. When the mounting substrate is placed in a rectangular layout area of the mounting substrate on the base; and the intervals at the boundaries between the mounting substrates are not aligned in a straight line end to end in a rectangular layout area of the mounting substrate at least in one direction from the direction of its short side and the direction of its long side.

With this configuration, since the mounting substrate is placed in a rectangular layout area of the mounting substrate, it is possible to obtain the amount of light that you want the planar light source to cover the entire rectangular layout area of the mounting substrate. In addition, since the discontinuities at the boundaries between the mounting substrates are not aligned in a straight line end to end in a rectangular layout area of the mounting substrate at least in one direction from the direction of its short side and the direction of its long side, the shadow is not so long as to be undesirable visible in the scattering plate.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described above, many types of rectangular mounting substrates are placed in a rectangular layout area of the mounting substrate; and the intervals at the boundaries between which the mounting substrates are not aligned in a straight line end to end in a rectangular layout area of the mounting substrate or in the direction of its short side, neither in the direction of its long side.

With this configuration, the shadow is not so long as to be undesirable visible in the scattering plate or in the long side direction or in the direction of the short side of the scattering plate.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described above, a variety of mounting substrates, each of which is formed by the sequential location of the mounting substrate in the form of strips with different lengths in the longitudinal direction, is placed in a rectangular layout area of the mounting substrate; and the intervals at the boundaries between the mounting substrates in the form of bands are displaced relative to each other between adjacent intervals of the rows of the mounting substrate so that the gaps at the boundaries between the mounting substrates are not aligned in a straight line end to end in a rectangular layout area of the mounting substrate at least in one direction from the direction of its short side and the direction of its long side.

This configuration facilitates the design of the placement of the mounting substrate.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described you the e, point sources of light are the elements of light radiation, which are mounted on the mounting substrate, and each of the light emission elements is covered with a lens.

Using this configuration, you can adjust the direction of light emitted from the light emission elements, through the use of lenses.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described above, the lens has the function of scattering light.

With this configuration, the function of scattering light lens helps to achieve satisfactory light scattering. This expands the range of directions in which light is emitted from the light emission elements, and this allows to cover a wide area with a relatively small number of light emission elements.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described above, the function of scattering light attached to the lens by means of roughening the surface of the lens-side mounting plate.

This configuration helps to achieve a more satisfactory dispersion of light.

In accordance with the preferred embodiment of the present invention, in the illumination device, set up shop data is bathing, as described above, the light emission elements are LEDs.

This configuration allows to obtain bright illumination device by using the brightness of the LEDs, which was significantly increased in recent years. It also allows you to receive the light source with longer life and lower energy consumption.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described above, the LEDs are configured to emit white light by coating a fluorescent substance having peak emission in the yellow range, the crystals radiation of blue light.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described above, the LEDs are configured to emit white light by coating fluorescent substances, one of which has a peak emission in the green range, and the other has a peak emission in the red range, the crystal radiation of blue light.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described above, the LEDs are configured to emit white light by combining crystals is zlecenia red light with crystals blue light which is applied a fluorescent substance having a peak of emission in the green range.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described above, the LEDs are configured to emit white light by combining crystals with blue light, green and red light.

In the white light emitted from the led emitting white light, even color tone can be an elusive goal, for example, due to a stronger blue color. However, by assembling LEDs for emitting white light, as in the present invention, it is possible to obtain light with aligned substantially uniform color tone.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described above, the LEDs are configured to emit white light by combining crystals of ultraviolet light with a fluorescent substance.

In accordance with the preferred embodiment of the present invention, in the illumination device formed as described above, the LEDs are configured to emit white light by coating the fluorescent substance, one of the cat is, which has a peak emission in the blue range, another has a peak emission in the red range, and the third has a peak emission in the green range, the crystal radiation of ultraviolet light.

In cases where the crystal radiation ultraviolet light is used as light source, light emitted from the light source tends to have uneven color tone, but with the configuration of the present invention can be obtained a light-aligned substantially uniform color tone.

In accordance with the preferred embodiment of the present invention the display device is configured to include any one of the illumination devices formed as described above and a display panel that receives light from the illumination device.

With this configuration, it is possible to obtain a display device which suffers less from uneven brightness.

In accordance with the preferred embodiment of the present invention in a display device formed as described above, the display panel is a liquid crystal display panel.

With this configuration, it is possible to obtain a liquid crystal display device, which suffers less from uneven brightness.

In accordance with preferred in what version of the embodiment of the present invention a television receiver includes a display device, formed as described above.

With this configuration, it is possible to obtain a television receiver which less suffers from uneven brightness.

Useful effects of the invention

In accordance with the present invention it is possible to obtain a satisfactory amount of light as a planar light source across a rectangular layout area of the mounting substrate and reduce the appearance of shadows, which are so long that they become undesirable visible in the scattering plate that otherwise would have led to the deterioration in the quality of illumination.

Brief description of drawings

Fig. 1 is a exploded perspective view of a display device including the illumination device in accordance with the preferred embodiment of the present invention;

Fig. 2 is a view in section, showing part of the device backlight;

Fig. 3 is a top view showing the placement of the mounting substrate in accordance with the first variant embodiment;

Fig. 4 is a top view of the scattering plate, illuminated mounting substrates placed in accordance with the first variant embodiment;

Fig. 5 is a top view of the placement of the mounting substrate in accordance with a second variant embodiment;

Fig. 6 is a top view of the placement of the mounting substrate in accordance with tert what they variant embodiment;

Fig. 7 is a top view of the placement of the mounting substrate in accordance with the fourth alternative embodiment;

Fig. 8 is a top view of the placement of the mounting substrate according to the fifth variant embodiment;

Fig. 9 is a top view of the placement of the mounting substrate in accordance with a sixth alternative embodiment;

Fig. 10 is a top view of the placement of the mounting substrate in accordance with a seventh variant embodiment;

Fig. 11 is a exploded perspective view of a television receiver.

Fig. 12 is a exploded perspective view of a traditional backlight;

Fig. 13 is a top view showing an example of the placement of the mounting substrate;

Fig. 14 is a top view of the scattering plate, illuminated mounting substrates are placed, as shown in Fig. 13;

Fig. 15 is a top view showing another example of the placement of the mounting substrate;

Fig. 16 is a top view of the scattering plate, illuminated mounting substrates are placed, as shown in Fig. 15;

Fig. 17 is a chart showing how different light in different directions of the radiation from the led; and

Fig. 18 is a conceptual diagram showing the total brightness of many LEDs.

Description of variants of the incarnation

On the basis of Fig. 1-4 will be described a configuration of a variant embodiment of a display device include what it in itself is illuminated, in accordance with the preferred embodiment of the present invention. In Fig. 1 device 69 display is illustrated as disposed horizontally, and its display surface facing upward.

The device 69 display includes a liquid crystal panel 59 display as the display panel. The liquid crystal panel 59 and display unit 49 backlight that illuminates the liquid crystal panel 59 display back, accommodated in the housing. The body is made through a combination of front element housing HG1 and the rear element housing HG2.

The liquid crystal panel 59 display is made by bonding together the substrate 51 active matrix, which includes switching elements such as thin film transistors (transistors TFT), and the opposite substrate 52 that faces the substrate 51 active matrix, using a not illustrated sealing material between them, and then by filling a space between the substrate 51 of the active matrix and the opposite substrate 52 of the liquid crystal.

The polarization film 53 is attached to the light receiving side of the substrate 51 of the active matrix and the radiant light side of the opposite substrate 52. The liquid crystal panel 59 display generates an image is compared with the use of change of light transmittance due to various inclinations of the liquid crystal molecules.

Block 49 backlight, which embodies the illumination device of the present invention has the following configuration. Block 49 backlight includes modules MJ of light emission, the base 41, the scattering plate 43, a prism sheet 44 sheet 45 with the microlenses.

The base 41 has a similar tray shape, and the walls rise from the edges of the rectangular main flat surface.

Each of the modules MJ of light emission includes the mounting substrate 21, a point light source located on the mounting substrate 21, a lens 24, which covers a point light source, and the reflective sheet 11, which is attached to the surface of the mounting substrate 21. The size of the reflective sheet 11 is generally the same as the size of the mounting substrate 21. A point light source is a light emission element mounted on the mounting substrate 21. The light emission element of this variant embodiment is a light emitting diode (LED) 22.

As the reflective sheet 11 may be used a sheet of foam-based resin containing a large number of small air bubbles and make the fullest use of the reflection on the boundary surface in air bubbles to reflect light. The reflective sheet of this type has a high optical reflectance; do what you foam-based polyethylene terephthalate (PET), having a reflectance of 98% or more, and thus, it is desirable to use a sheet of foam-based resin.

The lens 24 is equipped with a function of scattering light. Discusses the importance of the function of scattering light, which is supplied with the lens 24. Take, for example, the illumination device, disclosed in patent literature 1. Although the illumination device shown in Fig. 12, combined with the lenses 124, because the light from each of the LEDs 122 is emitted in a narrow range of directions, a large number of modules mj light radiation must be located with a high density in order to avoid uneven brightness. This increases the cost of components and Assembly of components and makes the device backlight expensive in General.

In recent times the brightness of the LEDs was significantly increased, thus, it is now possible to obtain a sufficient amount of light to cover the entire screen with a relatively small number of LEDs. However, if a small number of LEDs are low-density, it is impossible to avoid uneven brightness, and thus, in combination with each led, it is preferable to use a lens that is highly capable to diffuse light. The lens is equipped with a function of light scattering, will be mentioned is here as a "diffuser lens".

Fig. 17 is a graph showing how the illuminance (in Lux) is changed in different directions of the radiation in the case of an open led in the case of LEDs, combined with the scattering lens. In the case of open led illumination is very high for 90°angle representing an angle of the optical axis, and decreases sharply with distance from it. On the contrary, in the case of LEDs, combined with the scattering lens, the illumination of a certain level or higher can be obtained in a wider region, and the peak light intensity can be set for a corner, which is different from the angle of the optical axis. Of course, the picture light shown in the figure, may be modified as desired through appropriate design of the scattering lens.

Fig. 18 conceptually shows the cumulative brightness of many LEDs. In the figure the solid curves indicate the brightness of each led, combined with the scattering lens, while the dashed curves indicate the brightness outdoor led lights. Horizontal lines indicate the width (full width at half maximum) of the curve when the brightness at half the peak levels. In the case of LEDs, each of which is combined with the scattering lens, each curve may have a large width, and thus, it is easy in order to form the total integrated brightness as a flat brightness, as shown in the upper part of the figure. On the contrary, in the case of an open LEDs each curve has a high peak, but the narrow width, and, therefore, it is impossible to avoid the formation of non-uniformity of brightness obtained by combining the curves. Image with uneven brightness junk, so almost certainly you want to use the led, combined with the scattering lens.

Considering the above, the module MJ light emission is supplied with diffuser lens 24.

To the surface of the scattering lens 24 that faces the mounting substrate 21 may be used as a treatment for roughening, for example, texturing the surface, so as to give the surface the function of scattering light. This enables more efficient light scattering.

The mounting substrate 21 is rectangular, and on its upper surface, which is formed as a mounting surface 21U, formed many electrodes (not shown)arranged in a matrix, and electrodes mounted LEDs 22. The mounting substrate 21 functions as a common wiring substrate for light-emitting diodes 22. Many pairs of LEDs 22 and diffuser lenses 24 are arranged in a matrix in the direction of the arrow X and in the direction of the arrow Y shown in Fig. 1. Mounting mean the food 21 is attached to the base 41 in the appropriate manner, such as crimping, adhesion, screw connection or Klepka.

Diffuser lens 24 is circular in the top view and has a lot of legs 24a on its lower surface. The ends of legs 24a is attached to the mounting surface 21U of the mounting substrate 21 using an adhesive, and thus, the diffuser lens 24 is attached to the mounting substrate 21. The reflective sheet 11 has formed therein through holes, into which are inserted the legs 24a of the scattering lens 24. The presence of legs 24a forms a gap between the mounting substrate 21 and the diffuser lens 24. The air flow passes through the gap, and the led 22 is cooled by an air stream. In particular, when provided with the heat, you can use the whole cast module light emission, in which the led is embedded in a scattering lens.

Different types of LEDs can be used as the led 22. For example, you can use the led, which is designed with the ability to emit white light by coating on the crystal radiation of blue light fluorescent substance having peak emission in the yellow range. You can also use the led, which is configured to emit white light by coating on the crystal radiation of blue light fluorescent substances, one of which imetec radiation in the green range, and the other has a peak emission in the red range. You can also use the led, which is configured to emit white light by combining crystal radiation red light with crystal blue light which is applied a fluorescent substance having a peak of emission in the green range. You can also use the led, which is configured to emit white light by combining crystals with blue light, green and red light.

LEDs are configured to emit white light, tend to emit white light in which the blue component is more powerful than the other components, and this may cause uneven color tone. When using LEDs emitting white light by the methods described above, you can get coverage with aligned substantially uniform color tone.

In addition to the LEDs above types, you can use the led, which is configured to emit white light by combining crystal ultraviolet light with a fluorescent substance, in particular through application of fluorescent substances, one of which has a peak emission in the blue range, the other has a peak emission in the green range,and the third has a peak emission in the red range, the crystal radiation of ultraviolet light.

Using crystal radiation of ultraviolet light as a light source tends to cause uneven color tone, but using the above configuration, you can get coverage with aligned substantially uniform color tone.

As the mounting substrate 21 is provided by many types of mounting substrates 21; all mounting substrates 21 are rectangular in shape, but they have different rectangular shapes and different sizes. When placing the mounting substrate in accordance with the first variant embodiment shown in Fig. 1 and 3, a total of 11 of the mounting substrate 21 is placed in the rectangular region 41a place the mounting substrate (see Fig. 3), which is mounted on a base 41. Modules MJ light radiation, supported mounting substrate 21 together form a matrix, uniformly distributed over the entire rectangular region 41a place the mounting substrate.

When the LEDs 22 modules MJ radiation light is on, light emitted from the LEDs 22, a light diffusing plate 43 at the rear. Part of the light from the led 22 is not directly to the diffusing plate 43; it is reflected by reflective sheet 11 to the diffusing plate 43. Light rasshivaetsya in diffusing plate 43, and therefore the way, outside of the scattering plate 43 is represented by a plane having a relatively uniform brightness.

The gaps at the boundaries between the mounting substrates 21 are not aligned in a straight line end to end in a rectangular region 41a place the mounting substrate, as in the direction of its long side and in the direction of its short side. As a result, as shown in Fig. 4, even if there would be any shade S, they will not be undesirable way noticeable, as in the long side direction and in the direction of the short side of the diffusing plate 43. On the other hand, because the mounting substrate 21 is placed over the entire rectangular region 41a place the mounting substrate can be obtained, the amount of light that you want the planar light source to cover the entire rectangular region 41A place the mounting substrate.

Fig. 5-10 show the placement of the mounting substrate in accordance with other preferred variants of the incarnation.

In placing the mounting substrate in accordance with a second embodiment of the embodiment shown in Fig. 5, a total of eight mounting substrates 21 are placed in a rectangular area 41a place the mounting substrate. Each of the mounting substrates 21 four modules MJ of light emission are arranged in the column direction, i.e. in the direction from the plate, Y, it is shown in Fig. 1. With regard to the direction of the rows, that is, the direction of the arrow X shown in Fig. 1, the mounting substrate 21 left in the first row from the top in Fig. 5 has a width sufficient for maintenance of five columns of modules MJ of light emission, while the mounting substrate 21 on the right has a width sufficient for maintenance of 17 columns of modules MJ light radiation. This also applies to the mounting substrate 21 in the third row from the top. Two mounting substrates 21 in the second row from the top substrate on the left has a width sufficient for maintenance of 10 columns of modules MJ of light emission, while the substrate on the right has a width sufficient for maintenance of 12 columns of modules MJ light radiation. This also applies to the mounting substrate 21 in the fourth row from the top.

The gaps at the boundaries between the mounting substrates 21 are not aligned in a straight line end to end in a rectangular region 41a place the mounting substrate in the direction of its short side, and thus, at least in the direction of the shadow, which would be undesirable way noticeable, does not appear in the scattering plate 43. On the other hand, because the mounting substrate 21 is placed in the rectangular region 41a place the mounting substrate can be obtained, the amount of light that you want the planar light source to cover the her rectangular region 41a place the mounting substrate.

In placing the mounting substrate in accordance with a third variant of the embodiment shown in Fig. 6, a total of eight mounting substrates 21 are placed in a rectangular area 41a place the mounting substrate. Each of the mounting substrates 21 four modules MJ of light emission are arranged in the column direction, that is, in the direction of the arrow Y shown in Fig. 1. With regard to the direction of the rows, that is, the direction of the arrow X shown in Fig. 1, the mounting substrate 21 left in the first row from the top in Fig. 6 has a width sufficient for maintenance of five columns of modules MJ of light emission, while the mounting substrate 21 on the right has a width sufficient for maintenance of 17 columns of modules MJ light radiation. This also applies to the mounting substrate 21 in the third row from the top. Two mounting substrates 21 in the second row from the top substrate on the left has a width sufficient for maintenance of 17 columns of modules MJ of light emission, while the substrate on the right has a width sufficient for maintenance of five columns of modules MJ light radiation. This also applies to the mounting substrate 21 in the fourth row from the top.

Similarly to the second variant embodiment of the placement of the mounting substrate in accordance with a third variant embodiment of the intervals at the boundaries between the mounting substrates 21 are not aligned to the right the line end to end in a rectangular region 41a place the mounting substrate in the direction of its short side, and thus, at least in this direction, the shadow, which would be undesirable way noticeable, does not appear in the scattering plate 43. On the other hand, because the mounting substrate 21 is placed in the rectangular region 41a place the mounting substrate can be obtained, the amount of light that you want the planar light source to cover the entire rectangular region 41a place the mounting substrate.

In placing the mounting substrate in accordance with the fourth alternative embodiment shown in Fig. 7, a total of eight mounting substrates 21 are placed in a rectangular area 41a place the mounting substrate. Each of the mounting substrates 21 four modules MJ of light emission are arranged in the column direction, that is, in the direction of the arrow Y shown in Fig. 1. With regard to the direction of the rows, that is, the direction of the arrow X shown in Fig. 1, the mounting substrate 21 left in the first Radu top of Fig. 7 has a width sufficient for maintenance of five columns of modules MJ of light emission, while the mounting substrate 21 on the right has a width sufficient for maintenance of 17 columns of modules MJ light radiation. This also applies to the mounting substrate 21 in the second row from the top. Two mounting substrates 21 in the third row from the top substrate on the left has a width sufficient to sod is Rania 17 columns of modules MJ light radiation, while the substrate on the right has a width sufficient for maintenance of five columns of modules MJ light radiation. This also applies to the mounting substrate 21 in the fourth row from the top.

Similarly to the second variant embodiment, the mounting substrate in accordance with the fourth alternative embodiment of the intervals at the boundaries between the mounting substrates 21 are not aligned in a straight line end to end in a rectangular region 41a place the mounting substrate in the direction of its short side, and thus, at least in this direction, the shadow, which would be undesirable way noticeable, does not appear in the scattering plate 43. On the other hand, because the mounting substrate 21 is placed in the rectangular region 41a place the mounting substrate can be obtained, the amount of light that you want the planar light source to cover the entire rectangular region 41a place the mounting substrate.

In placing the mounting substrate according to the fifth variant embodiment shown in Fig. 8, a total of eight mounting substrates 21 are placed in a rectangular area 41a place the mounting substrate. Each of the mounting substrates 21 four modules MJ of light emission are arranged in the column direction, that is, in the direction of the arrow Y shown in Fig. 1. With regard to the management ranks, that is, the direction of the arrow X shown in Fig. 1, the mounting substrate 21 left in the first row from the top in Fig. 8 has a width sufficient for maintenance of five columns of modules MJ of light emission, while the mounting substrate 21 on the right has a width sufficient for maintenance of 17 columns of modules MJ light radiation. This also applies to the mounting substrate 21 in the second and third rows from the top. Two mounting substrates 21 in the fourth row from the top substrate on the left has a width sufficient for maintenance of 17 columns of modules MJ of light emission, while the substrate on the right has a width sufficient for maintenance of five columns of modules MJ light radiation.

Similarly to the second variant embodiment, the mounting substrate according to the fifth variant embodiment of the intervals at the boundaries between the mounting substrates 21 are not aligned in a straight line end to end in a rectangular region 41a place the mounting substrate in the direction of its short side, and thus, at least in this direction, the shadow, which would be undesirable way noticeable, does not appear in the scattering plate 43. On the other hand, because the mounting substrate 21 is placed in the rectangular region 41a place the mounting substrate can be obtained, the amount of light that you want the planar light source is La cover the entire rectangular region 41a place the mounting substrate.

In placing the mounting substrate according to the sixth variant embodiment, shown in Fig. 9, a total of 48 of the mounting substrates 21 are placed in a rectangular area 41a place the mounting substrate. The mounting substrate 21 is formed as a long on the side of the strip, and each of them have a lot of modules MJ of light emission is in the direction of rows, that is, in the direction of the arrow X shown in Fig. 1. The mounting substrate 21 does not necessarily have the same length. Concerning the three mounting substrates 21, located in the first row from the top in Fig. 9, the substrate on the left has a width sufficient for maintenance of five modules MJ light radiation, the substrate is in the centre has a width sufficient for maintenance of 12 modules MJ of light emission, and the substrate on the right has a width sufficient for maintenance of five modules MJ light radiation. Concerning the three mounting substrates 21, located in the second row will sorgu, the substrate on the left has a width sufficient for maintenance of seven modules MJ light radiation, the substrate is in the centre has a width sufficient for maintenance of eight modules MJ of light emission, and the substrate on the right has a width sufficient for maintenance of seven modules MJ light radiation. The configuration of the first and second rows are alternately repeated in the rest of the series.

Consequently, the ranks of the mounting podlog is to, each of which is formed of the three mounting substrates 21, located side by side to each other, placed in such a way that the boundaries between the mounting substrates 21 are shifted between each adjacent rows of mounting substrates, for example, the first and second rows of mounting substrates on top. As a result, the gaps at the boundaries between the mounting substrates 21 are not aligned in a straight line end to end in a rectangular region 41a place the mounting substrate in the direction of its short side, and thus, at least in this direction, the shadow, which would be undesirable way noticeable, does not appear in the scattering plate 43. On the other hand, because the mounting substrate 21 is placed in the rectangular region 41a place the mounting substrate can be obtained, the amount of light that you want the planar light source to cover the entire rectangular region 41a place the mounting substrate.

In placing the mounting substrate in accordance with a seventh variant embodiment, shown in Fig. 10, a total of 32 of the mounting substrate 21 is placed in the rectangular region 41a place the mounting substrate. Two mounting substrates 21 in the first row on top of the substrate on the left has a width sufficient for maintenance of eight modules MJ of light emission, while the substrate on the right has a width, the residual content of 14 modules MJ light radiation. Two mounting substrates 21 in the second row from the top substrate on the left has a width sufficient for maintenance of 14 modules MJ of light emission, while the substrate on the right has a width sufficient for maintenance of eight modules MJ light radiation. The configuration of the first and second rows are alternately repeated in the rest of the series.

Therefore, a series of mounting substrates, each of which includes two mounting substrate 21 located side by side to each other, placed in such a way that the boundaries between the mounting substrates 21 are shifted between each adjacent rows of mounting substrates, for example, the first and second rows of mounting substrates on top. As a result, the gaps at the boundaries between the mounting substrates 21 are not aligned in a straight line end to end in a rectangular region 41a place the mounting substrate in the direction of its short side, and thus, at least in this direction, the shadow, which would be undesirable way noticeable, does not appear in the scattering plate 43. On the other hand, because the mounting substrate 21 is placed in the rectangular region 41a place the mounting substrate can be obtained, the amount of light that you want the planar light source to cover the entire rectangular region 41a place the mounting substrate.

Place the mounting podlogi the variants of the embodiments from the first to the seventh are not intended to limit the scope of the present invention. The total number of mounting substrates 21, the number of modules MJ light radiation that are supported by each mounting substrate 21, the sample matrix modules MJ light radiation, etc. can be set freely.

Fig. 11 shows an example configuration of a television receiver to which the device 69 display. Television receiver 89 is designed so that the device 69 display and group boards 92 control is placed in the casing composed of the front of the housing 90 and the rear housing 91, which are connected to each other, the housing is supported by the rack 93.

It should be understood that the above-described variants of the embodiment are not intended to limit the present invention and that many changes and modifications may be made within the entity of the present invention.

Industrial applicability

The present invention can be widely applied to illumination devices, which includes the scattering plate, which is irradiated with the light from the light source. The present invention can also be widely applied to display devices including the illumination device, and television receiver equipped with a display device.

The list of designations

49 unit backlight

41 base

43 the scattering plate

MJ modulating the light emission

21 mounting substrate

22 led

24 diffuser lens

11 reflective sheet

59 LCD panel display

69 the display device

89 TV receiver

1. The illumination device, comprising:
the scattering plate;
the Foundation, which supports the scattering plate; and
the light source, which is formed from a variety of mounting substrates, each of which supports multiple point sources of light,
and
the mounting substrate is placed in a rectangular layout area of the mounting substrate, located on the base; and
the gaps at the boundaries between the mounting substrates are not aligned in a straight line end to end in a rectangular layout area of the mounting substrate, in at least one direction from the direction of its long side and the direction of its short side.

2. The illumination device according to claim 1,
in which
in a rectangular layout area of the mounting substrates are many types of rectangular mounting substrate; and
the gaps at the boundaries between the mounting substrates are not aligned in a straight line end to end in a rectangular layout area of the mounting substrate, as in the direction of its long side and in the direction of its short side.

3. The illumination device according to claim 1,
in Kotor the m
a variety of mounting substrates, each of which is formed by the sequential location of the mounting substrate in the form of strips with different lengths in the longitudinal direction, is placed in a rectangular layout area of the mounting substrate;
and
the gaps at the boundaries between the mounting substrates in the form of bands are displaced relative to each other between adjacent intervals of the rows of the mounting substrate so that the gaps at the boundaries between the mounting substrates are not aligned in a straight line end to end in a rectangular layout area of the mounting substrate, in at least one direction from the direction of its long side and the direction of its short side.

4. The illumination device according to claim 1,
in which
point sources of light are the elements of light radiation, which are mounted on the mounting substrate, and each of the light emission elements is covered with a lens.

5. The illumination device according to claim 4, in which the lens has the function of scattering light.

6. The illumination device according to claim 5,
in which
the function of scattering light attached to the lens by means of roughening the surface of the lens-side mounting plate.

7. The illumination device according to claim 4, in which the light emission elements are light-emitting diodes (LED).

8. The illumination device is .7, in which the LEDs are configured to emit white light by coating a fluorescent substance having peak emission in the yellow range, the crystals radiation of blue light.

9. The illumination device according to claim 7,
in which
the LEDs are configured to emit white light by coating fluorescent substances, one of which has a peak emission in the green range, and the other has a peak emission in the red range, the crystals radiation of blue light.

10. The illumination device according to claim 7, in which the LEDs are configured to emit white light by combining crystals radiation red light with crystals blue light which is applied a fluorescent substance having a peak of emission in the green range.

11. The illumination device according to claim 7, in which the LEDs are configured to emit white light by combining crystals with blue light, green and red light.

12. The illumination device according to claim 7, in which the LEDs are formed by combining crystals of ultraviolet light with a fluorescent substance.

13. The illumination device according to item 12, in which the LEDs are configured to emit white light by coating fluorescent substances, one of the to the that has a peak emission in the blue range, another has a peak emission in the green range, and the third has a peak emission in the red range, the crystals of ultraviolet light.

14. The display device containing the illumination device according to any one of claims 1 to 13 and a display panel that receives light from the illumination device.

15. The display device according to 14, in which the display panel is a liquid crystal display panel.

16. Television receiver containing the device display 14.



 

Same patents:

FIELD: electricity.

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EFFECT: reducing costs and energy consumption and increasing brightness of illuminated surface.

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FIELD: electricity.

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FIELD: information technology.

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FIELD: flat panel display devices, possible use as flat panel monitor with production of stereo image conditions.

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FIELD: physics.

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FIELD: physics.

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2 cl, 3 dwg

FIELD: electricity.

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EFFECT: achievement of nearly even distribution of lighting brightness without partially formed dark parts.

12 cl, 27 dwg

FIELD: electricity.

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EFFECT: providing uniform brightness.

9 cl, 15 dwg

FIELD: electricity.

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32 cl, 29 dwg

FIELD: electricity.

SUBSTANCE: illumination device 12 contains a great number of point sources 80 of light, base 14 comprising point sources 80 of light and window 14b through which light passes from point sources 80, optical element 15 (15a) faced towards point sources 80 of light and capable to cover the window 14b. Point sources 80 of light are located so that they ensure LH zone with high density of light sources in which the interval of the above sources is relatively small and LL zone with low density of light sources in which the interval of the above sources is relatively big. Reflective sections 50 which reflect light emitted by point sources 80 are formed at least in the area brought in coincidence with LL zone with low density of light sources in the optical element 15 (15a).

EFFECT: reducing costs and energy consumption and increasing brightness of illuminated surface.

19 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: highlighting device 12 consists of a board 18 with installed light-emitting diodes 17 serving as a light source, chassis 14 with the installed board 18 with light-emitting diodes 17 and an opening 4b for passage of light emitted by the light-emitting diodes 17 and holder 20 that passes in at least one direction along surface of the board plate 18 and fixed to chassis 14 in order to hold the board 18 together with chassis between the holder 20 and chassis 14.

EFFECT: ensuring stable fixture for light sources without use of screws.

36 cl, 29 dwg

FIELD: physics.

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EFFECT: providing a method of assembling microelectronic components which, when using an anisotropic electroconductive film to assemble a plurality of microelectronic components of different height on a base plate, allows assembling at precise positions on the base plate, thereby preventing position shift which results from compressive fixation.

5 cl, 16 dwg

FIELD: electricity.

SUBSTANCE: illumination device has a backlight unit (12), a panel (18) having light-emitting diodes (17) as a light source, a mounting frame (14) in which the panel (18) with light-emitting diodes (17) is mounted and which has an opening (14b) for outputting light from the light-emitting diodes (17), a reflecting sheet (22) for the mounting frame (14), placed along its inner surface for reflecting light, and a reflecting sheet (23), which, when viewed from the top, overlaps the panel (18) with light-emitting diodes on the side the opening (14b) more than the panel (18), and reflects light. The mounting frame (14) has a first supporting segment (27) which supports the panel (18) with the light-emitting diodes, and a second supporting segment (28) which is placed nearer to the opening (14b) than the first supporting segment (27) and which supports the reflecting sheet of the panel (23).

EFFECT: improved device.

36 cl, 33 dwg

FIELD: electrical engineering.

SUBSTANCE: 12-colour illuminator includes lamp 17 with hot cathode, mounting panel 14, diffuser 30 and supporting member 20. The mounting panel 14 contains lamp 17 with hot cathode and has hole 14b for light passage from lamp 17 with hot cathode. Diffuser 30 is placed before the lamp 17 with hot cathode and closes hole 14b. Supporting member 20 supports diffuser 30 at the side close to lamp 17 with hot cathode. Mounting panel 14 includes the area facing diffuser 30 and is set in LA area of light source with installed lamp 17 with hot cathode and empty LN area without lamp 17 with hot cathode. Diffuser 30 has a higher coefficient of luminous reflectivity at DA area covering light source in comparison with DN area covering the empty area. Diffuser 30 has maximum luminous reflectivity Rmax and minimum luminous reflectivity Rmin, and supportive element 20 is envisaged at the area covering the area of diffuser 30 that has luminous reflectivity R that meets the following equation (1).

EFFECT: prevention of irregular brightness.

19 cl, 24 dwg

FIELD: electricity.

SUBSTANCE: highlighting device 12 consists of a board 18 with installed light-emitting diodes 17 serving as a light source, chassis 14 with the installed board 18 with light-emitting diodes 17 and an opening 4b for passage of light emitted by the light-emitting diodes 17 and holder 20 that passes in at least one direction along surface of the board plate 18 and fixed to chassis 14 in order to hold the board 18 together with chassis between the holder 20 and chassis 14.

EFFECT: ensuring stable fixture for light sources without use of screws.

36 cl, 29 dwg

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