Ambient light system for display device

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

 

The technical FIELD TO WHICH the INVENTION RELATES.

The present invention relates to a system of ambient light to a display device for emission of ambient light on the wall behind the display device.

The LEVEL of TECHNOLOGY

In recent years the market are equipped with so-called AmbiLight function. These TVs contain light sources arranged on the periphery of the TVs, which emit ambient light on the wall behind the TV so that the emitted light coincides with the playback video. The effect is a virtual screen larger and deeper viewing experience. In the first generation of TVs feature AmbiLight AmbiLight system was to be installed around the edges of the TV and watch in the wall behind the TV. Subsequently, its location is kept, but to reduce the visibility of glare directed towards the wall behind the device and used reflectors to direct the light on the wall behind the TV. The internal arrangement of these components is such that it is accompanied by the emission of ambient light on the wall behind the TV.

Figure 1 (a) and (b) graphically presents two variations of the televisions 104 with AmbiLight function according to the prior art, which are placed at a distance d 18 from the wall 107 and contain thickened the th Central part 11 behind the TV and the surrounding part 10. As shown here, the system 20 of the ambient light contains a printed circuit Board (PCB) 13, the led(s) (LED) 15 for the emission of the ambient light 16 on the wall 107, the reflector 14, the outlet 12 and the module 20 of the ambient light on the edge. All these components are built into the edge of the TV.

In WO2008/081387 A1 disclosed a display device with ambient light, where the light sources and the reflector are located on the side edge of the display device and around the screen. The reflector includes a part with a hole, which allows you to divide in half the light from the light sources. Half or more than half of the light is directed to the background of the display device, and half or less than half of the light is directed through the diffuser front panel on the front of the display device.

In WO2005/076602 A1 disclosed a display device with a backlight, where parts of the edges of the display device provided by the light sources with optical fibers. Fiber optic cables provide a means for outputting light. Reflecting body can be encapsulated in an extruded fiber.

Currently, ultra-thin TVs are becoming increasingly popular. This modern approach, as depicted in figure 1 (a) and (b)cannot be used in ultra-thin TV for several reasons. The first reason is that the location of the lighting system on to the Ayu TV obviously makes the edges of the TV thicker than TV, which does not contain such an AmbiLight system. In addition, when the device is fitted closer to the wall (which is preferable for thinner devices), the light path before the wall is becoming shorter and shorter. This contradicts the requirements of the length of the light path, when it is impossible to increase the number of light sources such as LED. Eventually move the TV closer to the wall reduces the ability to add a reflector. As a result of this increased visibility glare.

DISCLOSURE of INVENTIONS

The present invention is to overcome the above disadvantages by providing system of the ambient light, which is suitable for ultra-thin display devices.

According to one aspect of the present invention relates to a display device, which contains a system of ambient light for the emission of ambient light on the wall behind the display device, which contains:

at least one light source located on the rear side of the display device, and

at least one reflector located on the rear side of the display device,

moreover, at least one light source is located in an area within the Central part of the rear side of the display device and at least one reflector is located at p is referee rear side of the display device so when the display device have near the wall, the light emitted by the at least one light source, at least partially reflected by the reflector toward the wall so that the reflected light is at least partially surrounds the periphery of the observed region of the display device.

Thus, the fact that the light sources that are in one of the embodiments contain light-emitting diodes (LED), and the reflector is embedded not in the front part and the rear part, allows the system to realize the ambient light in the ultra-thin display devices. Also the internal arrangement between the at least one light source and the reflector can be chosen so that the light path between the reflector and the wall is long enough, despite the fact that the display device is located very close to the wall, i.e. the lighting system provides much greater freedom of design. This means that all unwanted light effects, such as glare from the LED will become invisible, and what you will requirement for the length of the light path to minimize the number of light sources. Also when removing the light source from the edge of the display device and, for example, in the direction of the field inside the Central part of the rear side of the display device sources the light he will be hidden from direct observation.

In one embodiment, the implementation of the system ambient lighting further comprises at least one optical element located between at least one light source and at least one reflector so that the emitted light passes through the optical element.

This optical element can be used to transfer, reject, collect or expansion of the beam of rays emitted light. Placing at least one light source around the Central rear part and the reflector on the periphery of the rear side, the volumetric part of the system AmbiLight (PCB, LED), which are typically used in systems of the ambient light from the prior art, the shift from edge to center rear of the TV, which is already thinner, while leaving the reflector is smaller at the edge. As indicated above, an important prerequisite is that now the light is transferred through a longer distance between the source and the reflector, not reaching the wall behind the TV. Therefore, the introduction of such optical element is a special advantage.

In one embodiment, the implementation of at least one optical element is an optical fiber. In another embodiment, at least one optical element is a collimator. Also, the fiber and the collimator can be used in combination.

In one of the embodiments of the optical element is chosen from:

- wedge or

cone or

hub or

- diffuser or

- flat mirrors or

- arbitrarily curved mirrors or

their combination.

One or more of these elements can be combined with the specified fiber and/or collimator.

In one of the embodiments the reflector is in the rear part of the display device. Thus, the reflector and the rear of the display device act as a common element, thereby reducing the complexity and thickness of the structure.

In one embodiment, the implementation of the end reflector on the periphery of the rear side of the display device has a curved shape that faces away from the wall behind the display device. Thus, it is possible to avoid an unexpected Shine on the wall and, consequently, to improve the viewing experience.

In one of the embodiments the reflector is at least partially curved shape, and the shape is adapted to the internal location of the at least one light source in order to spread the light emitted by the at least one light source, in certain areas on the wall. Thus, it is possible to implement the optimal light distribution.

In the bottom of embodiments, the reflector includes one or more of the following:

textures made with the possibility of playing patterns on the wall,

- diffuse component.

Thus, the use of textures allows you to create some specific patterns that can be adapted for different users. You can use diffuse finish, to make the reflected light is softer, and thus, you can avoid unwanted light patterns caused by shadows or uneven mirrors.

According to another aspect of the present invention relates to a system for mounting to a wall containing the system of the ambient light for the emission of ambient light on the wall behind the display device, to which secure the mounting system on the wall, and the system installation on the wall contains:

at least one light source, and

at least one reflector,

moreover, at least one light source is located in an area within the Central part of the rear side of the display device and at least one reflector is located on the periphery of the rear side of the display device, when the system is mounted on the wall attached to the display device so that when the display device with the system installation on the wall is placed near to a wall, the light emitted by the at least one light source, hence, is her least partially reflected by the reflector towards the wall so that the reflected light is at least partially around the periphery of the observable area of the display device.

In one of the embodiments of the display device is selected from:

- LCD device

- plasma devices

devices based on organic LEDs (OLED),

- projection screen.

Each aspect of the present invention can be combined with any other aspects. These and other aspects of the invention obviously follow from the embodiments described herein later, and explained to them.

BRIEF DESCRIPTION of DRAWINGS

Just as an example, embodiments of the invention are described based on the drawings, in which

figure 1 (a) and (b) graphically presents two variants of TVs with AmbiLight function of the prior art,

figure 2 shows the system of the ambient light to a display device of the present invention,

figure 3 shows one of the embodiments of the system of the ambient light in the ultra-thin display device, and

figure 4-6 shows another variant of implementation of the system of the ambient light in the ultra-thin display device.

The IMPLEMENTATION of the INVENTION

Figure 2 shows the system 100 ambient lighting for the device display 104 according to the present invention, p is item system 100 ambient lighting made with the possibility of emission of the ambient light, indicated by the arrows 106, on the wall 107 behind the device display 104. The display device can be selected from: an LCD device, a plasma device based on organic LEDs (OLED), projection screen, computer monitor, etc. Under the term "wall" is understood as any type of surface which reflects the light towards the viewer 105, located in front of the device display 104. System 100 of the ambient light contains at least one source 101 light (IS) and the reflector 102 (A), which are located on the rear side of the device display 104. In one embodiment, the exercise system 100 ambient lighting further comprises at least one optical element 103 (AA)located between at least one source 101 light (IS) and the reflector 102 (A) so that the light from the beam of light enters into the optical element. Figure 3 and 4 in more detail shows that the internal location of the at least one source 101 light (IS) and reflector 102 (O) is such that when the device 104 display placed near the wall 107, the light 106 emitted by the at least one source 101 light (IS), is reflected by the reflector 102 (O) towards the wall 107 so that the reflected light 106 at least partially around the periphery of the observed region of the device 104 display the content that for example, the left and right side, or left and right sides and upper and lower sides so that it surrounds the observed region.

Figure 3 shows one of the embodiments of the system 100 of the ambient light, as shown in figure 2, the ultra-thin device display 104, such as the TV, which is located at a distance d 18 from the wall 107. Although this is not shown in the drawing, the front part 10 in figure 3 is much thinner than the front portion 10 of a typical TV with AmbiLight function of the prior art, where the system ambient lighting integrated in the front part. Also in figure 3 the distance d 18, as a rule, shorter than shown in figure 1, is achieved because a sufficiently large light path in the system 100 of the ambient light (which was not in the system of the prior art, shown in figure 1). The present invention is based on the use of space 302, shown by the dashed lines, which is created behind the device 104 of the display due to the thinner Central rear part 11 in order to accommodate the system 100 of the ambient light, instead of embedding the system 100 ambient lighting in the front part 10 of the device display 104, as shown in figure 1. In the embodiment, the printed circuit Board (PCB) 13 and the light source (IS) 101 are located on the side of the rear part 11. On p is referee rear part 11 of the thin reflector 14 (A) is by mounting on the rear of the device display 104. The reflector 14 may extend around the periphery of the device display 104. Between the source 101 light (IS) and the reflector 14 (A) posted by the optical element 103 (AA), which in this embodiment is a fiber 201, the function of which is to conduct the light from source 101 light (IS) in the direction of the reflector 14 (A) and to prevent the ingress of light on the wall 107 behind the device display 104. Provided that the light sources are LED, due to its length achieves a good mixing between the LED and good uniformity, even if the fiber output is close to the wall.

Figure 4 graphically presents one of the embodiments of the system 100 of the ambient light according to the present invention, where the reflector 102 (O) is the posterior part of the device display 104. Thus, to the rear of the display device selects the appropriate elements, or the rear part can be covered by a relevant element to achieve the desired reflective properties. As shown in this drawing, you can send one or more light sources 101 (IC), for example, light sources such as LED.

The reflector 102 (A) can be made of materials suitable to reflect light properly, for example, the reflector may be a diffuser for p is seivane and/or expansion of the light emitted 106 towards the wall 107 and, thus, can give soft light. This cone can be selected from the group of glass diffusers, Teflon diffusers, holographic diffusers, diffuser made from opal glass, gray glass diffusers, etc.

In one of the embodiments the reflector 102 (A) has an end curved shape extending upwards and towards the wall to avoid sudden transitions of brightness on the wall, and/or has the following form in order to concentrate the light in a certain area on the wall and to create optimal light distribution, and/or contains (macro) textures to create patterns on the wall. In addition to the mirrors, you can also use reflectors 102 (A) with a diffuse component to create a "softer" light and avoid unwanted light patterns due to non-planar mirrors are curved on the sides of the reflector, pointing to the wall behind the device display 104. You can also perform other types of reflectors 102 (A), for example partially shaped reflectors, where the form is adapted to the internal location of the at least one light source to focus light 106 emitted by the at least one light source, in certain areas on the wall.

Figure 5 shows a variant implementation figure 4, which shows the location dopolnitelnoj the optical element 201 (OA) on the light path of the beams of light between at least one source 101 light and reflector 102 (A) (see also 2). Instead of using the optical fiber as the optical element, as shown in figure 3, the optical element may represent, for example, the collimator. The collimator, in particular, made with the ability to colliergate lambertucci light from at least one source 101 light from the LED. Received rays are directed at the reflector 102, which, as previously noted, may be a rear part of the device display 104. Then the reflector 106 directs light back towards the wall 107. This two-step approach provides a long light path. At the same time, it allows light to reach the wall at a greater angle than when direct light emitted 106 or the light beam from the collimator directly towards the wall 107. This leads to improved visibility of the wall structure.

As shown in the drawing, the system 100 of the ambient light is in the same area around the Central rear part 11, where other electronic components. Currently, this area is still needed for the conversion of signals, which come in a display of the external device in the correct signals. Even when this area becomes unnecessary, the placement system 100 ambient lighting in this location will not affect the aspects of the design of thin devices.

Lambertucci light to Limonova using the optical element 201 (OA), i.e. in this case by using a collimator. Received parallel rays directed toward the rear of the device 104 display by adding angle to the light output from the optical element 103 (AA), for example from the collimator. On the back of the device 104 display again reflected towards the wall 107 for forming the field of ambient light (AmbiLight), which substantially or completely surrounds the device display 104 when viewed from the vantage point of the viewer 105.

Properties of the optical element 201 (OE) can be adapted to different variants of execution. As an example, in the case where the optical element is a collimator, the collimator can choose so that you can change the emitted light and get or focused light beam on the back of the device, or slightly diverging light beam (to be consequently continued decoupling effect).

In addition, the reflector 102 (O) may be designed for complete applications, where the reflector may be a mirror that can be a design element on the rear side of the device display 104 as a reflective ring that runs around the device. The reflector 102 (O) may be part of the properties of the back of the cover, as previously noted. This will be the case when the Central part of the rear part 11 and a Central rear part 11 of the device 104, the display is glossy white.

In one of the embodiments the reflector 102 (A) is not fully reflective, and has some diffuse properties to hide the defects of the optical system and to mitigate the (smooth) ambient light (edge) on the wall 107. For various applications it is possible to adapt the optimal ratio of specular and diffuse properties of the reflector 102 (O) (back cover of the device 104 of the display).

Other types of optical element 103 (AA), in addition to the optical fiber and the collimator includes a wedge diffuser, concentrator, diffuser, flat mirror, arbitrarily curved mirror or a combination thereof.

In one embodiment, the implementation of the system ambient lighting 100 LED, the collimator housing and a reflective region) can also be embedded in the system 601a-c mounting to a wall (for example, in the system VESA), as shown in Fig.6.

Certain specific details of the disclosed variant implementation is shown for purposes of explanation and not limitation, in order to provide a clear and complete understanding of the present invention. However, the person skilled in the art should understand that in practice without significant deviation from the essence and scope of the data of the invention the present invention can be implemented in other types of exercise, which do not correspond exactly to details given in this document. In addition, in this context, and for purposes of brevity and clarity, detailed descriptions of well known devices, circuits, and methods are omitted so as to avoid unnecessary details and possible confusion.

In the claims specified number of the reference positions, but the number of the reference positions is indicated only for reasons of clarity and should not be construed as limiting the scope of the claims.

1. A display device that contains the system (100) ambient light for the emission of ambient light (106) on the wall (107) behind the device (104) display, and the system of the ambient light contains:
at least one source (101) light, located on the back side of the display device, and
at least one reflector (102)located on the rear side of the device (104) display,
moreover, at least one source (101) light is located in the region inside the Central part of the rear side of the device (104) display and at least one reflector (102) is located on the periphery of the rear side of the device (104) display so that when the device (104) display placed near to a wall (107), the light emitted by the at least one light source, at measures is partially reflected by the reflector (102) towards the wall (107) thus, that reflected light (106) at least partially around the periphery of the observed field device (104) display.

2. The display device according to claim 1, in which the system ambient lighting further comprises at least one optical element (103)located between at least one source (101) of light and at least one reflector (102) so that the emitted light passes through the optical element (103).

3. The display device according to claim 2, in which at least one optical element (103) is a light guide.

4. The display device according to claim 2, in which at least one optical element (103) is a collimator.

5. The display device according to claim 2, where the optical element (103) is selected from:
- wedge or
cone or
hub or
- diffuser or
- flat mirrors or
- arbitrarily curved mirrors or
their combination.

6. The display device according to claim 1, in which at least one source (101) of light is a light emitting diode (LED).

7. The display device according to claim 1, in which the reflector (102) is in the rear part of the device (104) display.

8. The display device according to claims 1 or 7 in which the end part of the reflector (102) on the periphery of the rear side of the display device has a curved shape and Rawley away from the wall behind the device (104) display.

9. The display device according to claim 1, in which the reflector (102) is at least partially curved shape.

10. The display device of claim 8, in which the reflector (102) is at least partially curved shape.

11. The display device according to claim 1, in which the reflector (102) includes one or more of the following:
textures made with the possibility of creating patterns on the wall,
- diffuse component.

12. The display device according to claim 1, in which the display device is selected from:
- LCD device,
- plasma devices,
devices based on organic LEDs (OLED),
- projection screen.

13. System installation on the wall containing the system (100) ambient light for the emission of ambient light (106) on the wall (107) behind the device (104) display, which krepjat system (601 a-C) mounting on the wall, and the system installation on the wall contains:
at least one source (101) of light, and
at least one reflector (102),
and at least one source (101) light is located in the region inside the Central part of the rear side of the device (104) display and at least one reflector (102) is located on the periphery of the rear side of the device (104) display when the system (601 a-C) mounting on the wall is attached to the device (104) display in such a way that, to the Yes device (104) display system (601 a-C) mounting on the wall is placed near the wall (107), the light emitted by the at least one light source, at least partially reflected by the reflector (102) in the direction of the wall (107) so that the reflected light (106) at least partially around the periphery of the observed field device (104) display.



 

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4 cl, 1 tbl, 3 dwg

FIELD: electro-optics.

SUBSTANCE: method can be used in optical filter constructions intended for processing of optical radiation under conditions of slow or single-time changes in processed signal, which changes are caused by non-controlled influence of environment. Optical signal is applied to entrance face of photo-refractive crystal where phase diffraction grating is formed by means of use of photo-refractive effect. Reflecting-type phase diffraction grating is formed. For the purpose the optical signal with duration to exceed characteristic time of phase diffraction grating formation, is applied close to normal line through entrance face of photo-refractive crystal of (100) or (111) cut onto its output face which is formed at angle of 10°to entrance face. Part of entrance signal, reflected by phase diffraction grating, is used as output signal. To apply optical signal to entrance face of photo-refractive crystal, it has to be transformed into quazi-flat wave which wave is later linearly polarized.

EFFECT: power independence of processing of optical signal.

2 cl, 2 dwg

FIELD: measuring equipment.

SUBSTANCE: optical heat transformer includes base of body with optical unit positioned therein, transformer of heat flow and consumer of heat flow in form of thermal carrier. Optical unit consists of optical heat source and reflectors of coherent heat flows and concentrator - generator of coherent heat flow in form of two collecting mirrors and a lens, positioned on different sides of source, with possible redirection of coherent heat flow for interaction with transformer of heat flow with following transfer of heat flow.

EFFECT: decreased energy costs.

1 dwg

FIELD: measuring technique.

SUBSTANCE: electro chromic device has first substrate, which has at least one polymer surface, ground primer coat onto polymer surface, first electro-conducting transparent coating onto ground primer coat. Ground primer coat engages first electro-conducting coating with polymer surface of first substrate. Device also has second substrate disposed at some distance from first substrate to form chamber between them. It has as well the second electro-conducting transparent coating onto surface of second substrate applied in such a way that first coating is disposed in opposition to second one. At least one of two substrates has to be transparent. Device also has electrochromic medium disposed in chamber, being capable of having reduced coefficient of light transmission after electric energy is applied to conducting coatings. Electrochromic medium and ground primer coat are compatible.

EFFECT: simplified process of manufacture; cracking resistance.

44 cl, 1 dwg

FIELD: laser and fiber optics.

SUBSTANCE: in accordance to invention, optical wave guide is heated up during recording of Bragg grating up to temperature, which depends on material of optical wave guide, and which is selected to be at least 100°C, but not more than temperature of softening of optical wave guide material, and selected temperature is maintained during time required for recording the Bragg grating.

EFFECT: increased thermal stability of recorded Bragg gratings.

2 cl, 3 dwg

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