Image projecting light-emitting system

FIELD: electricity.

SUBSTANCE: invention refers to illumination engineering and is intended to form controlled image (10) of illuminated spots (11a-11b) on remote plane (3) of the projected image. Light-emitting system (1) includes a variety of individually controlled light-emitting devices (6a-6c) made in matrix (5) of light-emitting devices with pitch (PLS) of light-emitting devices, and optic system (7) arranged between matrix (5) of light-emitting devices and plane (3) of the projected image. Optic system (7) has the possibility of projecting the light emitted by matrix (5) of light-emitting devices onto plane (3) of the projected image in the form of projected matrix of illuminated spots (11a-11c) having pitch (Pspot) of the projected image, which exceeds pitch (PLS) of light-emitting devices.

EFFECT: improving luminous efficiency and compactness.

12 cl, 7 dwg

 

The technical field to which the invention relates

The present invention relates to a light emitting system designed for education managed image of the illuminated spots on the remote plane of the projected image.

The level of technology

In connection with the ongoing progress in the development of new light sources such as new and improved light emitting diode (LED), there are new areas of applications. For example, was developed products, which allows the user to change the environment using controlled lighting. One example of such products is the lamp LivingColours from Philips, which through its intuitive remote control provides the user the freedom to open up a huge range of colours.

As a further step, it would be desirable to allow the user to control additional aspects of lighting, such as the formation of managed optical images on a wall or the like

For the formation of such managed images can be used in existing devices, such as electronic projectors. However, for the formation of the image is actually used only a small part of the light radiation generated by the light source in the same the devices - usually only 5%.

Disclosure of invention

Taking into consideration the above-mentioned and other disadvantages of the prior art, a General object of the present invention is to provide an improved light-emitting system that allows you to create managed optical image on a wall or similar object with a higher relative luminous efficiency than existing electronic projection devices.

Accordingly, the invention provides a light-emitting system designed for the formation of controlled image of the illuminated spots on the remote plane of the projected image, and a light-emitting system includes: a variety of individually controlled light-emitting devices, in a matrix of light-emitting devices with a pitch of light-emitting devices; and an optical system made between matrix light-emitting device and the plane of the projected image, when this optical system configured to project light emitted by the matrix light-emitting device, the plane of the projected image in the form of the projected matrix-lit spots with one-to-one relation to the light-emitting devices, and the projected matrix has a step of a projected image exceeds the s step light-emitting devices.

The term "light-emitting device or a light guiding device in the context of the present application should be understood as referring to any device capable of emitting, or output light, i.e. electromagnetic radiation within the visible region of the spectrum.

The term "step" of the matrix refers to the distance between adjacent devices contained in the matrix, one of the main directions of this matrix. As should be clear to experts in the field of technology, a one-dimensional matrix has one value step and the two-dimensional matrix has two values, which can be equal or not equal.

The present invention is based on the implementation in which managed optical image may be projected on a wall or similar object with a very high relative luminous efficiency by forming an image to be projected, using a matrix of light-emitting devices and the projection of the individual light-emitting devices to the appropriate spot on the wall or similar object, and the array pitch of the spots is greater than the array pitch of light-emitting devices.

The projected matrix of illuminated spots may contain mainly the same number of elements of the matrix, as the matrix light-emitting device.

When using witoslawa system in accordance with the present invention, almost all of the light power emitted from light-emitting devices, is used to project the optical image. This leads to significantly improved relative luminous efficiency of the light-emitting system as compared to systems of the prior art, which relies on light modulated spatial optical modulator or a similar device.

In addition, the optical system in accordance with the invention can be made very compact and cost-effective because it requires only matrix light-emitting device and the optical system without moving parts and/or individually controllable elements to achieve the required managed images projected light radiation.

The optical system is performed between the matrix light-emitting device and the plane of the projected image can mainly contain a matrix of optical elements of the optical elements.

In addition, the optical elements may be focusing lenses. Focusing lens mainly can have essentially identical properties focus.

In accordance with one embodiment the step of optical elements in the optical matrix elements can be larger than the step light-emitting devices, and less the eating step of the projected image. In this configuration can be achieved projected matrix of illuminated spots of the projected image, which exceeds the step light-emitting devices, without using any additional optical devices.

Since the distance between the surface of the projected image and the optical elements are usually considerably greater than the distance between the light emitting devices and optical elements, the step of optical elements can be advantageously more than step light-emitting devices, by a factor between 1 and 1.25, and preferably, at a ratio in the range from 1.05 and 1.18. In other words, the step of optical elements can be associated with a step of light-emitting devices in accordance with the following relationship:

Poptical element= • Plight-output device

where Poptical element- step optical elements; Plight-output device- step light-emitting devices, and • the above factor.

To ensure that the light signal emitted from each of light-emitting devices in a matrix of light-emitting devices, is projected to its associated optical element in the optical matrix elements, the number of optical elements in the optical matrix elements can mainly meet shadowsharpshooter:

N(Poptical element-Plight-output device)<Poptical element,

where N is the largest size of a matrix of optical elements in any direction;

Poptical element- step optical elements; and

Plight-output device- step light-emitting devices.

In addition, each light-emitting device may comprise at least a first light source and second light source configured to emit different colored light. This allows you to project a colored image.

Mainly the first light source contained in the first light-emitting device can be performed with respect to the optical element associated with the first light emitting device, so that light emitted from the first light source is projected in the form of spots associated with the second light source contained in the second light-emitting device. The second light-emitting device can be placed next to the first light-emitting device, or the first and second light emitting devices can be spaced at a distance by means of one or more other light-emitting devices.

This configuration of light-emitting devices allows you to control the color of the projected spots by mixing the light emitted by the light sources contained in different with etoileui devices.

In addition, the first and second adjacent light sources contained in this light-emitting device may be separated by distance ΔLSspecified value:

ΔLS=nz0ziPspot,

where n is an integer 1, 2, 3,..., Zi- optical distance between the optical element associated with the light-emitting device, and the plane of the projected image, z0- optical distance between the light-emitting device and the optical element, and Pspot- the step of the projected image. As is well known to specialists in this field of technology, "optical distance" is the physical length multiplied by the refractive index of the medium through which light passes.

Thus, it can be achieved essentially complete overlap between the differently colored components spots, whereby it is possible to avoid spurious effects, such as color fringes.

In accordance with an additional embodiment, the optical system may further comprise directing the rays of the element is performed between a matrix optical cell battery (included) the tov and the plane of the projected image, in this guide beams element is designed with the ability to direct the light rays outgoing from the optical matrix elements, the projected matrix illuminated spots in the plane of the projected image.

With guide beams elements made between the optical matrix elements and the plane of the projected image, the difference between the step of optical elements and step output elements can be reduced (step optical elements and the step output elements can be even equal), through which may be placed a matrix of optical elements (light emitting devices) are larger in size, and this allows for higher resolution and/or by forming a projected image of a larger size at this distance.

Guide the rays of the element may contain a matrix of directing optical elements, each of which is designed with the ability to direct the light beam emanating from the associated optical element in the optical matrix elements to the linked spot in the projected matrix illuminated spots in the plane of the projected image.

Alternatively, or in combination with the above-described guiding rays of the element is performed between a matrix of optical elements and the plane of the projected image, the light-emitting system in the accordance with various embodiment of the invention may include directing the rays of the element, made between matrix light-emitting device and the optical matrix elements. This guide rays of the element can contain the matrix guides the optical elements by analogy with what has been described above.

In addition, the light-emitting system can mainly be made with the ability to prevent relative movement between the matrix light-emitting device and an optical system. In accordance with this embodiment, the position of one or both of the matrix light-emitting device and the optical system can be adjustable. Thus, the configuration of the projected spots of the user can be adjusted in accordance with the conditions at the location of application of the light-emitting system.

For example, the light-emitting system can be configured to allow adjustment of the distance between the matrix light-emitting device and an optical system. Thus, the light-emitting system can be adapted for different distances to the surface, which should be the projected image, and/or required for different overlaps between adjacent spots on the surface.

In addition, the alignment between the matrix light-emitting device and the optical system can be adjustable, that is, either one or both of the mA is the matrix light-emitting device and the optical system can be moved in the transverse direction, whereby the user can adjust the location of the projected image of the illuminated spots, while the light-emitting system remains stationary.

In addition, the light-emitting system may include a dividing wall separating the light-emitting device, with a partition made between the matrix light-emitting device and an optical system. Thus, it is possible to prevent the possibility that the radiation direction of the light data signal by the light-emitting device is changed by the optical element, which is not related with this light-emitting device.

Brief description of drawings

These and other aspects of the present invention will now be described in more detail with reference to the accompanying drawings showing preferred in the present embodiments of the invention, in which:

1 schematically illustrates an exemplary light-emitting system that projects the optical image onto a wall;

Figure 2 - schematic representation of the light-emitting section of the system shown in figure 1, illustrating its one possible configuration;

Figure 3 is a view in section along the line A-A' simplified representation of a part of the light-emitting system shown in figure 2, which illustrates geometries the th form of a light-emitting system;

4 is a view in section along the line A-A' partial light-emitting system shown in figure 2, which illustrates, as can be shaped differently colored spots;

5 is a schematic representation of the light-emitting section of the system shown in figure 1, illustrating another possible configuration;

6 is a schematic representation of the light-emitting section of the system shown in figure 1, illustrating another possible configuration, which includes directing the rays of the element is performed between a matrix of optical elements and the plane of the projected image; and

Fig.7 is a view in section along the line B-B' of the light-emitting part of the system shown in Fig.6.

The implementation of the invention

In the following description of the present invention is mainly described in relation to the light-emitting system in which light-emitting devices contain a variety of differently colored light emitting diodes (LED) and a matrix normal positive lenses.

It should be noted that this is in any case does not restrict the scope of the invention, which is equally applicable to light-emitting systems containing other types of light-emitting devices, as well as other optical elements such as Fresnel lens, etc.

Figure 1 represents an image disassembled, schematic is illustrating an exemplary light-emitting system 1, projecting the image 2 on the remote wall 3, which represents the plane of the projected image. With regard to Figure 1, it light-emitting system 1 contains a matrix 5 individually controlled light-emitting devices 6a-6c (only three of which are identified using positional notation, to avoid cluttering the drawing) and the optical system 7, containing a matrix of optical elements 9a-9c, is made between the light-emitting devices 6a-6c and the plane 3 of the projected image.

In addition, as schematically illustrated in figure 1, the light emitted by the matrix 5 light-emitting devices 6A-6C, is projected as the projected matrix 10 lit spots 11a-11C. Pitch (distance between adjacent light emitting devices) PLSmatrix 5 light-emitting devices 6A-6C, as can be seen in figure 1, significantly less than the step Pspotlit spots 11a-11C in the plane 3 of the projected image. The conversion from step PLSlight-emitting devices to step Pspotlit spots 11a-11C is provided an optical system 7, is made between the matrix 5 light-emitting devices 6A-6C and the plane 3 of the projected image, and will be further described below in relation to a number of illustrative embodiments svetol the emitting system, shown in figure 1.

The first variant implementation of the light-emitting system having the basic configuration illustrated in figure 1, will be further described with reference to Figure 2.

Figure 2 is a view in plan of the light-emitting system 1, visible from the plane 3 of the projected image shown in figure 1, and the light-emitting device 6A-6C are visible through the optical elements 9a-9c. In this particular embodiment, each light emitting device 6A-6C contains a blue LED 12a, 13a, 14a, red LED 12b, 13b, 14b and green LED 12c, 13c, 14c, and optical elements 9a-9c are provided in the form of lenses made in increments of Plensthat is greater than the step PLSlight-emitting devices. Although an implementation option, illustrated in figure 2, is a painted managed an implementation option, the principle of conversion of the step PLSlight-emitting devices to step Pspotlit spots 11a-11C, shown in figure 1, will first be described for a simplified monochromatic case, which is schematically illustrated in figure 3 and which corresponds to the configuration of Figure 2 only red LED 12b, 13b, 14b.

Now with reference to Figure 3 will be described the relation between geometric properties presents a variant implementation of the light-emitting system 1. In the embodiment schematically the ill is trirhena figure 3, optical elements 9b-9c performed on the optical distance z0from sources 6b-6c light, and the plane 3 of the projected image is located on the optical distance zifrom the optical element 9b-9c. As indicated in figure 3, each source 6b-6c light can be equipped with a collimating optical system 15b-15c, to some degree colliergate light emitted by the sources 6b-6c light. This is done to ensure that a large part of the light emitted by sources 6b-6c light can be captured by a corresponding lens 9b-9c.

Now, in the embodiment, which is schematically illustrated in Figure 3, the conversion from step PLSlight sources to step Pspotilluminated spots on the plane 3 of the projected image is achieved by selecting the appropriate geometric shape of the system, i.e. for the step PLSlight sources by selecting the appropriate distances z0between sources 6b-6c light and lenses 9b-9c and step Plensfor lenses 9b-9c in the matrix 8 lenses.

In particular, the configuration of the optical system in accordance with the illustrated now by way of the implementation must satisfy the following relationship:

PLS=Plens-z0zi(Pspot-Plens)(1)

Since, in practice, Pspot>>Plensequation (1) implies that PLSless than Plens. Preferably 0,8Plens<PLS<Plens. Even more preferred is 0,85Plens<PLS<0,95Plens. Note also that z0<<zi.

The size of the spots projected on the wall, dspotusually equal to the magnification of the system, multiplied by the linear size of the source 6a-6b light (plus collimator 15b-15c, if it applies), dLS:

dspot=ziz0dLS(2)

To ensure smooth transitions intensity and color in image 2 (figure 1)projected n the plane 3 of the projected image, you want some overlap between adjacent dot elements 11a-11P (Figure 1). This overlap follows from relations

O=dspot-Pspotdspot×100%(3)

It was found that the required smooth transitions gives the overlap Of>25%. In addition, to retain the ability to distinguish between adjacent dot elements 11a-11P (preventing the loss of resolution of the optical image 2, projected on the wall 3), the overlap may have an upper limit, which can mainly be About<75%.

It should be noted that can be created additional overlap through the placement of additional optical element (figure 3 not shown), such as a diffuser (or matrix is weak and has a small step lenses), close to the plane of the lenses.

Now, after the explanation of the geometric shape of one exemplary variant of the implementation of the light-emitting system 1, through which can be achieved the required transformation between step PLSwitoslawa devices 6A-6C and step P spotspots 11a-11C, projected on the plane 3 of the projected image, we can now go on to describe how the configuration shown in Figure 3 may be modified so as to allow the formation of colored projected image.

Figure 4 is a view in section along the line A-A' part of the light-emitting system shown in figure 2, which illustrates, as can be shaped differently colored spots by using a light-emitting system shown in figure 1.

To obtain a high-quality image by using colored illuminated spots 11a-11P, you want to ensure that the spots of the main colors will be projected in the plane 3 of the projected image in such a way that they are essentially completely overlap. Thus, can be formed spots actually freely managed colors without spurious effects, such as color fringes, etc.

Now, with reference to Figure 4, will be described a sample implementation in which the system is based on three primary colors, red (=R), green (=G), and blue (=B). Behind (as seen from the plane 3 of the projected image) of each of the lenses 11a-11C is a triplet of RGB-LED 12a-12c, 13a-13c, 14a-14c. Light emitted from each LED of these triplets, forms a light spot on the wall 3, as schematically illustrated by the and Figure 4 for blue LED 12a, red LED 13b and green LED 14c. The resulting spot 11b appears white.

To ensure that the illuminated spot, resulting from different light sources contained in the various light-emitting devices 6A-6C (here triplets LED), the overlap should be selected suitable interval between the light sources contained in the light-emitting devices 6A-6P.

As for the approximate version of the implementation, shown in figure 4, it can ensure that each LED of a particular color results in a light spot on the wall, which is completely combined with LED light for more color from another triplet, through the implementation of LED 12a-c, 13a-c, 14a-c within each triplet 6A-6C with a suitable interval. This spacing follows from relations

ΔLS=nz0ziPspot(4)

This value n is an integer that specifies the distance, in units of the step Pspotspots between the spots formed in the projection of the Board, emitted from adjacent light sources in the light emitting device 6A-6P. The size of the gap ΔLSmostly can be chosen so that the above-mentioned value n=1. If it is impossible to arrange different colored light sources so close to each other, we can choose n=2 or n=3.

It should be noted that different colored sources 12a-12c, 13a-13c, 14a-14c of the light may be provided as a separate device or can be mounted together in the same building.

Alternatively, hexagonal placement of light-emitting devices illustrated in figure 2, the light-emitting device 6A-6C can be placed in a rectangular configuration, as schematically illustrated in Figure 5.

The configuration shown in Figure 5, differs from those described above with reference Figure 2, so that each light emitting device 6A-6C contains four sources 12a-12d, 13a-13d, 14a-14d of the world and the fourth light source is a light source configured to emit white light, in order to achieve improved lighting.

It should be noted that like the version of the implementation shown in figure 2, the step of optical elements 9a-9c is greater than the step light-emitting devices 6A-6C and in the horizontal and in the vertical direction.

Next, with reference Phi is. 6 and 7, we discuss another possible configuration, applicable in different variants of implementation of the light-emitting system 1, shown in figure 1.

In accordance with various configurations discussed so far, the transformation from step PLSlight-emitting devices to step Pspotlit spots 11A-11C, projected on the plane 3 of a projected image was achieved by selecting a suitable step Plensmatrix of lenses made between the matrix 5 light-emitting devices 6A-6C and the plane 3 of the projected image.

Alternatively or additionally, the light-emitting system 1 may be provided for directing the rays of the element is performed between a matrix of optical elements 9a-9c and the plane 3 of the projected image to direct the light rays passing through the optical elements 9a-9c, to get lit spots 11a-11C with the desired pitch Pspoton the plane 3 of the projected image.

For example, as schematically illustrated by figure 6, step Plensoptical elements 9a-9c can be selected the same as the step PLSlight-emitting devices 6A-6C, and directing the rays of the element can be performed between the optical elements 9a-9c and the plane 3 of the projected image in order to achieve essentially complete conversion of the t P LSPspot.

Specialists in the art can appreciate that the magnitude and direction of deflection caused by directing the rays of the element, will depend on the location in the matrix, and that guide the rays of the element, in the case illustrated in figure 6, must be done in such a way that when tracing rays from the outer side of the light-emitting system 1 through the guide beams of the element and the matrix of optical elements 9a-9c to light-emitting devices 6A-6C light emitting device 6A-6P look, as performed at intervals equal to the step PLSdefined by equation (1).

An example of a simple guide rays of the element, schematically illustrated in the exemplary configuration figure 6, based on having a small step-dimensional matrix prisms 17a-17i. Guide the rays of the element may contain a plurality of optical elements, or may be provided as one large guide all the rays of the element, which may be, for example, large negative lens, preferably a lens type Fresnel lens.

7, which represents a view in section along the line B-B' of the light-emitting part of the system shown in Fig.6 schematically illustrates the principle of deviations for the simplified case of a monochromatic light-emitting devices 6a-6b. Through con is Horatii, shown in Fig.7, the same step Pspotspots is achieved for the same pitch Plensoptical elements, as in figure 3.

Finally, it should be noted that can be taken various measures in order to avoid boundary effects in painted managed variants of implementation of the light-emitting system 1 in accordance with the present invention. In accordance with one approach light sources placed close to the edges of the matrix 5 of light-emitting devices, which cannot be combined with other colors, needed to provide a full spectrum of colors for this location of the spots on the wall, can be managed so that they do not radiate light, or they can be excluded from the light-emitting system 1.

Specialists in the art should be understood that the present invention is by no means the case is not limited to the preferred options for implementation. For example, between adjacent light-emitting devices 6A-6C can be placed (absorbing) partitions, to ensure that light emitted from the specific light-emitting device, can only pass through the corresponding lens, and not through the adjacent lens. In addition, if someone wants to project the image onto a wall at an angle differing from a right angle, may be advantageous to have the distance, to the which less than the average distance between the light emitting devices and optical elements for spots projected close to the light-emitting system, and have a length that is greater than the average distance between the light emitting devices and optical elements for spots projected farther from the light-emitting system. In addition, lens type Fresnel lens, which is a strong (high optical zoom), and still have light weight, can favorably be used as optical elements. Additionally, some or all of the optical elements contained in the light-emitting system can be mostly electrically adjustable active optical elements, based on, for example, liquid crystal or technology electromachine. For example, through the use of active diffuser can adjust the overlap of the spots of light on the wall. Through the use of active vent after deflection of the beam it is possible to adjust the image size of the spots of light on the wall.

1. Light emitting system (1) for the formation of controlled image (10) of the illuminated spots (11a-11b) on the remote plane (3) of the projected image, and the aforementioned light-emitting system (1) contains:
many individually managed Sveti the illuminating device (6A-6C), made in the matrix (5) light-emitting devices with a pitch (PLS) light-emitting devices, each light emitting device comprises at least one light emitting diode, and
the optical system (7)containing a matrix of optical elements (9a-9c)with step (Plensoptical elements exceeding the above-mentioned step (PLS) light-emitting devices arranged between the matrix (5) light-emitting devices and the said plane (3) of the projected image,
these optical system (1) configured to project light emitted from the said matrix (5) light-emitting devices mentioned plane (3) of the projected image in the form of the projected matrix illuminated spots (11a-11C)with step (Pspot) of a projected image exceeding the above-mentioned step (Plensoptical elements,
when this light-emitting system satisfies the following relations:
N(Poptical element- Plight-output device)<Poptical element,
where N is the largest size of a matrix of optical elements in any direction in a number of optical elements (9a-9c),
Poptical element- step optical elements, and
Plight-output device- step light-emitting devices.

2. Light emitting system (1) according to claim 1,in which mentioned the e optical elements (9a-9c) is a focusing lens.

3. Light emitting system (1) according to claim 1 or 2, in which the above-mentioned step (Plensoptical elements is larger than the above-mentioned step (PLS) light-emitting devices, the ratio being in the range from 1 to 1.25.

4. Light emitting system (1) according to claim 1 or 2, in which each light-emitting device (6A-6C) contains at least the first source (12b, 13b, 14b) of light and the second source (12c, 13c, 14c) of light is configured to emit different colored light.

5. Light emitting system (1) according to claim 4, in which the first source (12a) of the light contained in the first light-emitting device (6a)arranged relative to the optical element (9a)associated with the first-mentioned light-emitting device (6a), so that the light emitted from first-mentioned source (12a) of the light is projected in the form of spots (11b)associated with the second source (13b) of the light contained in the second light-emitting device (6b).

6. Light emitting system (1) according to claim 5, in which the first (12a) and second (12b) adjacent the light sources contained in this light-emitting device (6a), separated by distance ΔLSdefined by the ratio:
ΔLS=nz0ziPspot/mi> ,
where n is an integer 1, 2, 3, ..., zi- optical distance between the above optical element (9a)associated with the aforementioned light-emitting device (6a), and the above-mentioned plane (3) of the projected image, z0- optical distance between the aforementioned light-emitting device (6a) and the above-mentioned optical element (9a), and Pspot- mentioned step of the projected image.

7. Light emitting system (1) according to claim 1 or 2, in which the aforementioned optical system (7) further comprises directing the rays of the element is performed between the optical matrix elements (9a-9c) and the said plane (3) of the projected image, and referred to the guide beams element is designed with the ability to direct the light rays emanating from the above matrix of optical elements, referred to the projected matrix illuminated spots (11a-11P) on said surface (3) of the projected image.

8. Light emitting system (1) according to claim 1 or 2, in which the aforementioned optical system (7) further comprises directing the rays of the element made between the matrix (5) light-emitting devices and the above-mentioned optical matrix elements (9a-9c), and referred to the guide beams element is designed with the ability to point the light rays, emitted from the aforementioned light emitting devices (6A-6C), referred to the projected matrix illuminated spots (11a-11P) on said surface (3) of the projected image.

9. Light emitting system (1) according to claim 7, in which the aforementioned guide beams element contains the matrix guides the optical elements (17a-17i), each of which is designed with the ability to direct the light beam emitted from the associated light emitting device (6A-6C) in the above matrix light-emitting device, to the related spot (11a-11C) in the above-mentioned projection matrix of illuminated spots on said surface (3) of the projected image.

10. Light emitting system (1) according to claim 1 or 2, is configured to allow relative movement between the matrix (5) light-emitting devices (6A-6C) and the above-mentioned optical system (7).

11. Light emitting system (1) according to claim 10, configured to allow adjustment of the distance (z0) between the matrix (5) light-emitting devices and the above-mentioned optical system (7).

12. Light emitting system (1) according to claim 1 or 2, containing a dividing wall separating the aforementioned light-emitting device (6A-6C), these partition walls arranged between the matrix (5) light-emitting devices and the UE is mentioned optical system (7).



 

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2 cl, 3 dwg

FIELD: information technology.

SUBSTANCE: light source (100) includes at least one light-emitting diode (LED) (104), e.g., in a LED matrix which generates short wavelength light. One or more wavelength converting elements (114A), e.g., luminophor elements, convert at least a portion of the short wavelength light from the LED (104) into longer wavelength, e.g., red or green. A dichroic element (110), placed between a LED and wavelength converting element(s), transmits light from the LED and reflects longer wavelengths from the wavelength converting element(s). The colour selection panel (120) selects the colour of light to be formed using the light source (100) and which has to be recycled for another option for conversion by the wavelength converting element(s) (144A) or for reflection by the dichroic element (110). The colour selection panel (120) can operate in one or both spatial and time domains.

EFFECT: reduced volume and higher energy-efficiency of light sources.

15 cl, 10 dwg

FIELD: information technologies.

SUBSTANCE: regular red primary source (22, 23) of light in the system (10) of projection display is added to a source (23) of amber light. Green (21) and blue (20) primary sources of light are also provided. All sources of light are light-emitting diodes (LED) of high capacity. The specific composition of red and amber light is achieved by variation of durations of red LED and amber LED connection. If the displayed RGD image may be created using a higher percentage of amber light and a lower percentage of red light, duration of amber LED connection increases, while duration of red LED connection reduces. Light/pixel modulators (14, 15, 16) for development of a full-coloured image from, three primary sources of light are controlled for compensation in case with the variable amber/red composition. This methodology improves efficiency of the projection system and creates lower heating. Additional increase in luminosity may be achieved by control of the light composition from the green and blue LED (46), as the primary source of light, and/or by means of control of the light composition from the blue and moderately blue LED (58), as the primary source of light.

EFFECT: increased efficiency of the light source at light-emitting diodes in the projection display.

27 cl, 8 dwg

FIELD: physics.

SUBSTANCE: method is realised by controlling a projection system comprising several solid-state light sources (2, 3, 4) of different colour (12,13, 14) and at least one spatial light modulator (1) having an array of switchable elements. Said array is illuminated by at least one of said light sources (2, 3, 4) for several illumination periods and is addressed such that the light is time- and spatially modulated to project images onto a screen. In the present method said light sources (2, 3, 4) are controlled to emit light modulated in amplitude (15) and/or time (18) during said illumination periods of said array. With the present method an increased grey scale resolution of the projection system can be achieved.

EFFECT: possibility of projecting images with improved grey scale resolution.

8 cl, 5 dwg

FIELD: physics.

SUBSTANCE: mirrors/filters are placed in space so as to create a collinear matrix group of rectangular beams through successive reflections and/or transmissions from several optical frequencies emitted by a defined number of radiation sources. The top step consists of matrix of mirrors/filters with size m x n in p items superimposed with each other. The bottom step is a matrix from m mirrors/filters built into p rows with possibility of addressing outgoing beams to columns of matrices of the top step. The mirrors/filters of the matrices have characteristics which enable transmission of spectra of optical frequencies of the incoming beam or part of it and/or transmission of the spectra of optical frequencies of the incoming beam or part of it to the next mirror/filter.

EFFECT: optimisation of the process of frequency-address light beam routing.

5 cl, 11 dwg

FIELD: physics.

SUBSTANCE: method is implemented with complete exclusion of electromechanical properties. A video projector has three lasers with optical radiation in the three fundamental colours which are optically connected to a device for summing the said radiation and a scanning unit which is made in form of a scanning electrostatic system having a projection optics unit. Radiation brightness is modulated directly in the laser radiation sources.

EFFECT: increased reliability, reduced labour input in making the video projector and higher image quality.

2 dwg

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

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

FIELD: electricity.

SUBSTANCE: display device contains ambient light system (100) to emit ambient light (106) to the wall (107) behind display device (104). Ambient light system includes at least one source (101) of light located in the central part of display device (104) rear side and at least one reflector (102) located at display device (104) rear side. At least one reflector (102) is located at the periphery of display device (104) rear side so that when display device (104) is located close to the wall (107) the light emitted by at least one source of light is reflected by reflector (102) towards the wall (107) in such way that reflected light (106) at least partially encloses the observed area of display device (104) at the periphery.

EFFECT: improving efficiency.

13 cl, 7 dwg

FIELD: electricity.

SUBSTANCE: invention relates to the field of lighting equipment. Lighting device (12) is equipped with a number of optical source cards (20) with variety of point optical sources (17) installed at them. Average colour tone of point optical sources (17) (POS) at each card (20) is in equivalent colour range defined by the square, and each opposite side of two square sides has coordinate length in the axis X equal to 0.015, and each opposite side of two square sides has coordinate length in the axis Y equal to 0.015 at the colour space chromaticity chart of International Commission on Illumination as of 1931. POS are categorized into three colour ranges defined by squares, at that each side of the square has a length of 0.015. At that the second and third ranges adjoin the first one that includes the above equivalent colour range. POS cards include the first cards with installed point optical sources in the first and second colour ranges, and the second cards with installed point optical sources in the first and third colour ranges. The first and second POS cards are placed in sequence.

EFFECT: providing total emission of practically uniform colour.

26 cl, 17 dwg

FIELD: electricity.

SUBSTANCE: backlighting device (20) comprises a substrate (22), where multiple point sources of light are placed in the form of light diodes (21), and slots (23), which are also arranged on the substrate. Multiple point sources of light include the first point source of light (21), which is placed near the slot (23), and the second point source of light (21), which is placed in a position distant from the slot (23) compared to the first point source of light (21). The light beam in the surroundings of the slots is higher than the light beam in the area different from the surroundings of the slots.

EFFECT: reduced heterogeneity of brightness of a display panel without increase in number of process operations.

15 cl, 12 dwg

FIELD: physics, optics.

SUBSTANCE: backlight for a colour liquid crystal display includes white light LEDs formed using a blue LED with a layer of red and green phosphors over it. In order to achieve a uniform blue colour component across the surface of a liquid crystal display screen and achieve uniform light output from one liquid crystal display to another, the leakage of blue light of the phosphor layer is tailored to the dominant or peak wavelength of the blue LED chip. The backlight employs blue LED chips having different dominant or peak radiation wavelength.

EFFECT: different leakage amounts of light through the tailored phosphor layers offset the attenuation on wavelength of the liquid crystal layers.

15 cl, 13 dwg

FIELD: physics.

SUBSTANCE: liquid crystal display device (100) of the present invention includes a liquid crystal display panel (10) and a lateral illumination unit (20) which emits light from a position which is lateral with respect to the panel (10). The panel (10) includes a front substrate (1), a back substrate (2) and a light-diffusing liquid crystal layer (3). The unit (20) includes a light source (7), which is situated in a position which is lateral with respect to the panel (10), and a light-guide (6), having a light-output surface (6b) through which light emitted by the light source (7) as well as light incident on the light-guide (6) is emitted towards the end surface (1a) of the substrate (1). The surface (6b) is slanted relative a direction which is vertical with respect to the front surface (1b) of the substrate (1), such that it faces the back surface of the panel (10).

EFFECT: preventing generation of a bright line in the panel.

3 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: in carrier pin (11) used for support of optical elements (43-45) though which part of light passes from light-emitting diode (24) a part of peak (14) contacting with light-diffusing plate (43) is formed of light-reflective material while a part of rack (12) supporting peak (14) is formed of light-transmitting material.

EFFECT: eliminating mom-uniformity of lighting.

12 cl, 13 dwg

FIELD: physics.

SUBSTANCE: backlight unit (49) of a display device (69), having a liquid crystal display panel (59), equipped with a base (41), a diffusing plate (43) mounted on the base, and a light source which illuminates the diffusing plate with light. The light source has a plurality of light-emitting modules (MJ) which include a light-emitting diode (22) which serves as a light-emitting element, and a divergent lens (24) covering the light-emitting diode. The light-emitting modules are placed on a grid on the base supporting the diffusing plate. Carrier pins (26) for mounting the diffusing plate are located on points on the base. The carrier pins are placed on sections of lines linking neighbouring pairs of light-emitting modules.

EFFECT: eliminating non-uniformity of luminance.

10 cl, 14 dwg

FIELD: physics.

SUBSTANCE: backlight unit (49) of a display device (69), having a liquid crystal display panel (59), has a base (41), a diffusing plate (43) which is supported by the base, and a point light source for irradiating the diffusing plate with light. The point light source has a light-emitting diode (22) mounted on a mounting substrate (21). A plurality of light-emitting diodes covered by divergent lenses (24) are provided. Optical axes (OA) of the divergent lenses are inclined relative the diffusing plate, and the divergent lenses, having different inclinations of optical axes, are placed randomly on the base. The divergent lenses, having optical axes that are inclined in opposite directions, are paired and the pairs are arranged in a matrix.

EFFECT: reduced non-uniformity of luminance and hue.

25 cl, 12 dwg

FIELD: medicine.

SUBSTANCE: optical stereotraining device for preventing and treating acquired myopia comprises monochrome sphero-prismatic or afocal prismatic lenses in each of two windows of a front piece. The optical stereotraining device differs from known one of the same state of art by the fact that one of the two windows of the front piece comprises the lens coloured as extreme daylight spectrum (380-575 nm), and the other one - as near daylight spectrum (575-760 nm).

EFFECT: application of the given device enables higher visual acuity and performance efficiency of the visual system, increased adaptation reserve promoting a higher level of visual system tolerance to action of non-specific environmental hazards.

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