Backlight device, display device and television receiver

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

 

The technical field

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

The level of technology

The display device using niesamowita panel display, such as, for example, a liquid crystal panel, is generally used in conjunction with the device of the backlight that illuminates the display panel from behind. In the illumination device of this type uses any of various light sources, including a cold cathode lamp, a light-emitting element and the like, examples of the light-emitting element includes a light-emitting diode (hereinafter referred to as "light-emitting diodes (LED), organic electroluminescent element, an inorganic El element and the like, the most common of which is currently led. In the illumination device described in Patent document 1, as the source of light is led.

As described in Patent document 1 is illuminated, as shown in Fig. 12, the LEDs 122 are installed on the mounting substrate 121, and the lens 124, which covers each of the LEDs 122, mounted on the mounting substrate 121. Mounting substrate 121, the led 122 and the lens 12 are light-emitting module mj. Lens 124 has the shape of a hemispherical dome having a uniform thickness, and transmits light emitted from each of the LEDs 122, without causing significant refraction of light. Thus, if the LEDs 122 are arranged so that they are turned upwards, as shown in Fig. 12, the proportion of light emitted in directions close to the vertical direction is large.

In the illumination device described in Patent document 2, as the source of light is led. As described in Patent document 2 is illuminated a set of LEDs located on the substrate, forming a flat light source and the diffusing plate is exposed to light emitted data in a flat light source. On the substrate are the tabs for securing the scattering plate.

List of links

Patent literature

Patent document 1: JP-A-2008-41546

Patent document 2: JP-A-2006-278077

The invention

Technical problem

In each of the illumination devices described in Patent document 1 and Patent document 2, respectively, the LEDs are placed with high density. In recent years, the brightness of the LEDs was increased, which allowed to obtain the desired total amount of light through the use of a reduced number of LEDs that od is ako, leads to the next problem.

The LEDs forming a flat light source, usually located on the grid (grid pattern). If the reference pin for fixing the scattering plate is placed, as in the illumination device described in Patent document 2, the most preferred position for placement of the support pin would be a center region that defines a single cell of the grid. In Fig. 6 shows an example in which selected this location for placement. Although Fig. 6 is a top view, but the support pin 101 is depicted so that when viewed at an inclination from above. Each of the support pins 101 is surrounded in four directions by a group of LEDs number of LEDs 102 and is equidistant from each of them.

In Fig. 7 shows a luminous surface of the scattering plate 103, which is illuminated by the LEDs 102, shown in Fig. 6. The luminescent surface casts the shadow of the support pin 101. In a state in which each of the support pins 101 is surrounded by a group of LEDs number of LEDs 102, as shown in Fig. 7, is discarded cruciform shadow 101S.

As shown in Fig. 8, when the LEDs 102 are placed in a zigzag pattern in which each of the support pins 101 is installed in place of one of the groups of LEDs number of LEDs 102, to which gdy of the support pins 101 is surrounded by six spheres, the group of LEDs so that that is, as shown in Fig. 9, the luminescent surface of the scattering plate 103 casts the shadow 101S, stretching across six dimensions. If, as shown in Fig. 10, the LEDs 102 are placed at short distance from each other in the direction along the column in order to achieve a higher density, as shown in Fig. 11, a shadow is cast 101S, which is the cross, along the diagonals of the rectangle. In any case, such a shadow as described above, causes the unevenness of brightness of the scattering plate, which adversely affects the quality of the displayed image in the case where the illumination device is used as a backlight of a display device, so as far as possible the shadow should be removed.

The present invention is made taking into account the above, and has as its task, in the illumination device, in which multiple light emitting modules, each of which includes a light-emitting element located on the grid and is used as a light source, and a diffuser plate, illuminated by the light from this light source, to reduce the size of the shadow projected on the diffusing plate supporting pin for fixing the scattering plate, making the uneven brightness of the scattering plate becomes less than the visible.

Solution

In accordance with a preferred embodiment of the present invention, the illumination device includes: a base, a scattering plate is fixed on the base, a light source that illuminates the scattering plate light, and the light source is formed by placing multiple light emitting modules, each of which includes a light-emitting element placed on the grid on the base, the support pins are located on the base for fixing the scattering plate on the base, each of the support pins is located on a segment of a straight line connecting a pair of adjacent light-emitting module among the light-emitting modules.

In accordance with this configuration, the shadow cast anchor pin on the scattering plate is a combined form of shadows cast illuminating light of the light emitting modules on both sides of the bearing pin, and is elongated in shape and reduced in size, therefore, the uneven brightness of the scattering plate becomes less visible.

In accordance with a preferred embodiment of the present invention, each of the light-emitting module includes a diffusing lens which covers the light emitting element.

Diverging lens is placed with the spruce increasing component of the light emitted from the light emitting element, which extends in the transverse direction. Although the presence of a dispersing lenses tends to highlight the shadow of the support pin, in any case, in accordance with this configuration of the present invention, a shadow is cast, elongated in shape and reduced in size, therefore, the uneven brightness of the scattering plate becomes less visible.

In accordance with a preferred embodiment of the present invention, the reference pin is placed in position at an equal distance from each pair of adjacent light-emitting module among the light-emitting modules on both sides of the bearing pin.

In accordance with this configuration, none of the cases more than a dark shadow is dropped only on one of both sides of the support pin, with the shadow of the same degree of darkness are discarded from both sides, therefore, the resultant shadow less visible.

In accordance with a preferred embodiment of the present invention, the supporting pins are fixed on the mounting substrate, on which is fixed the light emitting element.

In accordance with this configuration, the relative positions of each of the light emitting modules and the reference pin can be accurately established, with established mutual arrangement can be maintained constant is m Even if due to the model changes the mounting substrate must be installed on different dimensions base type, the same mutual position of each of the light emitting modules and the reference pin can be used unchanged in the basis of another type and, therefore, no need to worry about placing the anchor pin.

In accordance with a preferred embodiment of the present invention, the support pin has a high reflectance of light, at least part of its surface illuminated illuminating light from the light-emitting modules.

In accordance with this configuration, it is unlikely that the illuminating light from the light-emitting modules is absorbed by the supporting pin, and therefore, light emitted from the light-emitting modules can sufficiently be used for light scattering plate.

In accordance with a preferred embodiment of the present invention, the support pin is formed from a polymeric material, which is added to a substance with a high light reflectance.

In accordance with this configuration, the support pin having a surface with high reflectivity, can be easily obtained.

In accordance with the preferred embodiment nastojasih the invention, light-emitting element is an led.

In accordance with this configuration, through the use of LEDs, the brightness of which has been notably improved, can be obtained from the illumination device, providing high brightness.

In accordance with a preferred embodiment of the present invention, the display device includes: an illumination device, having any of the above configurations; and a display panel that receives light from the illumination device.

In accordance with this configuration, in the display device, the unevenness of brightness associated with a support pin that is usually less noticeable.

In accordance with a preferred embodiment of the present invention, the display panel is a liquid crystal display panel.

In accordance with this configuration, in the liquid crystal display device, the unevenness of brightness associated with a support pin that is usually less noticeable.

In accordance with a preferred embodiment of the present invention, creates a television receiver which includes a display device having the above described configuration.

In accordance with this configuration, the screen of the television receiver, the unevenness of brightness associated with the PBO is NYM pin, less visible.

Useful effects of the invention

In accordance with the present invention, the shadow cast anchor pin on the scattering plate under the illuminating light from the light-emitting module comprising a light emitting element is elongated in shape and reduced in size, therefore, the uneven brightness of the scattering plate becomes less visible.

Brief description of drawings

[Fig. 1] is a perspective view with a spatial separation of parts of a display device containing the illumination device, in accordance with the preferred embodiment of the present invention.

[Fig. 2] is an explanatory view illustrating the location of the anchor pin on the device backlight, in accordance with the preferred embodiment of the present invention.

[Fig. 3] is a conceptual view showing the shape of the shadow projected on the diffusing plate when the selected location of the anchor pin, shown in Fig. 2.

[Fig. 4] is a cross-section of the mounting substrate, showing the state of mounting of the support pin.

[Fig. 5] is a perspective view with the spatially separated parts of a television receiver.

[Fig. 6] not only is em a first explanatory view illustrating the location of the anchor pin.

[Fig. 7] is a conceptual view showing the shape of the shadow projected on the diffusing plate when the selected location of the anchor pin, shown in Fig. 6.

[Fig. 8] is a second explanatory view illustrating the location of the anchor pin.

[Fig. 9] is a conceptual view showing the shape of the shadow projected on the diffusing plate when the selected location of the anchor pin, shown in Fig. 8.

[Fig. 10] is a third explanatory view illustrating the location of the anchor pin.

[Fig. 11] is a conceptual view showing the shape of the shadow projected on the diffusing plate when the selected location of the anchor pin, shown in Fig. 10.

[Fig. 12] is a perspective view with the spatially separated parts of a traditional backlight.

[Fig. 13] is a diagram showing the change of light depending on the direction of radiation of the led.

[Fig. 14] is a conceptual diagram that shows the total brightness of many LEDs.

Description of embodiments

In figures 1-3 below describes the design of the VA is Ianto implementation of the display device, containing the illumination device, in accordance with the preferred embodiment of the present invention. In Fig. 1 device 69 shows the state of the horizontal position from the uppermost surface of the display.

The device 69 display includes as the display panel the liquid crystal panel 59 display. The liquid crystal panel 59 and display unit 49 backlight that illuminates the liquid crystal panel 59 display back, enclosed in a housing. The housing is formed by the connection of the front element housing HG1 and the rear element housing HG2.

The liquid crystal panel 59 of the display is formed by attaching a substrate 51 active matrix including a switching element such as thin film transistor (TFT) or something similar, to the opposite substrate 52 opposite substrate 51 active matrix, using a not shown sealing material and filling the 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 each of the light receiving side surface of the substrate 51 of the active matrix and the radiating side of the opposite substrate 52. The liquid crystal panel 59 display generates an image is ment through the use of variations in the transmittance due to the tilt of liquid crystal molecules.

Block 49 backlight, which uses the illumination device, in accordance with the present invention has the following configuration. Namely, the block 49 backlight includes a light-emitting module MJ, the base 41, the reflective sheet 42 is large in size, the scattering plate 43, a prism sheet 44 and microlensing sheet 45.

Light-emitting module MJ includes a mounting substrate 21, the led 22 as a light-emitting element, the scattering lens 24 and a built-in reflective sheet 11.

Block 49 backlight device 69 display, which has a liquid crystal panel 59 display, includes a base 41, the scattering plate 43 secured on the base 41, and a light source that illuminates the scattering plate 43 light. The specified light source is formed by placing multiple light emitting modules MJ, each of which includes an led 22 as a light-emitting element and diffuser lens 24, which covers the led 22, located on the grid on the base 41, which is fixed diffuser plate 43. Based on 41 are supporting pins 26 for fixing the scattering plate 43. Each of the support pins 26 are placed on the segment of the straight line connecting a pair of adjacent light emitting modules among svatos uchumi modules MJ.

As described above, in recent years the LEDs was increased brightness, which allowed us to obtain the amount of light required to illuminate the entire surface of the screen through the use of a relatively small number of LEDs. Rare placement of the LEDs, however, inevitably causes uneven brightness and, therefore, it is preferable to use each individual led in combination with a lens having a high scattering ability (in this description, such a lens is called the "scattering lens").

Fig. 13 is a diagram showing a change in luminance (unit: Lux) depending on the direction of radiation of each open led and LEDs, equipped with a diffusing lens. In the case of open led its brightness reaches a maximum at an angle of 90°, which is an angle to its optical axis, and decreases sharply with increasing deviation angle from 90°. On the other hand, in the case of LEDs, equipped with a diffusing lens, the amount of light equal to or greater than a given value, can be stored in a broader range of angles, the brightness can be set to achieve its maximum at an angle different from the angle of the optical axis. There is no doubt that shown in the figure, the distribution of light the surface may vary in different ways depending on the structure of the scattering lens.

In Fig. 14 shows a conceptual representation of the cumulative brightness of many LEDs. In this figure the wave form shown as a solid line indicates the brightness of an led provided with a diffusing lens, and the waveform shown by a dotted line, indicates the brightness outdoor led. A horizontal line passing through the waveform indicates the width of the waveform when the brightness value, which is the half of the maximum value (full width at half maximum). In the case of LEDs, each of which is provided with a diffusing lens, each waveform can be obtained over-width, and therefore, the waveform of the respective brightness in aggregate form as full brightness can be easily made flat, as shown by the solid line in the upper part of the drawing. On the other hand, in the case of an open LEDs each received waveform has a large height and small width, so the wave form corresponding brightness in aggregate form, inevitably becomes uneven. The image with such unevenness in brightness, it is undesirable and, therefore, it is extremely important that was selected led, equipped with a diffusing lens.

In connection with the foregoing, the light emitting module MJ is configured to enable receive the lens 24.

The mounting substrate 21 has an oblong rectangular shape, wherein the mounting surface 21U, which is the upper surface of the mounting substrate 21, at a given distance from each other in the longitudinal direction is formed by the set of electrodes (not shown), each of which is mounted the led 22. As the led 22 can be used, the led of this type, which provides white light due to the combined use of three led crystals that emit light of different colors. The mounting substrate 21 is used as the common substrate, a shared set of LEDs number of LEDs 22. Namely, with respect to the entirety of the led 22, the scattering lens 24 and a built-in reflective sheet 11, as one group, the number of such groups is placed at a given distance from each other in the longitudinal direction of the mounting substrate 21, as shown in Fig. 1.

Diffuser lens 24 is in the horizontal projection is circular in shape and has on its lower surface provided with many sections 24A with a leg. Sections 24A with a leg connected at its ends with mounting surface 21U of the mounting substrate 21 by using an adhesive material, and, thus, the diffuser lens 24 is mounted on the mounting surface 21. The sections 24A the leg provides a gap between the mounting substrate 21 and the diffuser lens 24. The air stream flowing through the gap to cool the led 22. In that case, if the heat dissipation problem can be solved, then you can also use light-emitting module, executed as a single unit, which is obtained by embedding an led light scattering in the lens.

As the led 22 can be used LEDs of different types. For example, can be applied to the led of this type, which uses crystal led which emits blue light, in combination with a phosphor that emits yellow fluorescent light after receiving light from the chip led, and emits white light through the combined use their emitted blue light and yellow light. In addition, can be applied to the led of this type, which uses crystal led which emits blue light, in combination with phosphors that emit green fluorescent light and red fluorescent light, respectively, after receiving light from the chip led, and emits white light through the combined use their emitted blue light, green light and red light.

In addition, can be applied to the led of this type, which are shared crystal led which emits red light, crystal led, which is sluchae blue light, and a phosphor that emits green fluorescent light based on the blue light from the emitting blue light crystal led and emits white light through the combined use their emitted red light, blue light and green light.

In addition, can be applied to the led of this type, which are shared crystal led which emits red light, crystal led which emits green light and crystal led which emits blue light and emits white light through the combined use their emitted red light, green light and blue light.

In Fig. 1 shared mounting substrate 21 of this type, in which five LEDs 22 are placed on one sheet of substrate, and the mounting substrate 21 of this type, in which eight LEDs 22 are placed on one sheet of substrate. The mounting substrate 21 of this type, in which five LEDs 22 are placed on one sheet of substrate, and the mounting substrate 21 of this type, in which eight LEDs 22 are placed on one sheet of substrate, are connected to each other by applying a pair of connectors 25 (there is no doubt that assume the use of the covered connector and covering the connector, each connector 25 is mounted on the far edge of the Mont is the author of the substrate 21.

With regard to the combination of the mounting substrate 21 of this type, in which five LEDs 22 are placed on one sheet of substrate, and the mounting substrate 21 of this type, in which eight LEDs 22 are placed on one sheet of substrate, many of these groups are placed parallel to each other on the base 41. On the mounting substrate 21, the LEDs 22 are placed in the direction of the long side of the base 41, namely, in the direction indicated by the arrow X in Fig. 1, and two layers of combinations of the above types of mounting substrates 21 are placed in the direction of the short side of the base 41, namely, in the direction indicated by the arrow Y in figure 1. Therefore, the LEDs 22 are placed in a matrix. The mounting substrate 21 is fixed on the base 41 accordingly, for example, by crimping, welding, screwing or prikladavaniem to it.

Built-in reflective sheet 11 is located between the mounting substrate 21 and the diffuser lens 24. Built-in reflective sheet 11 is fixed on the mounting surface 21U in a position in which the mounting surface 21U facing the lower surface of the diffusing lens 24. Built-in reflective sheet 11 has a higher reflectivity than the mounting substrate 21. Built-in reflective sheet 11 has a circular shape in horizontal projection and located the Yong concentrically relative to the scattering lens 24. The diameter of the built-in reflective sheet 11 is larger than the diameter of the scattering lens 24. In the built-in reflective sheet 11 is provided by a through hole to pass through it each of the sections 24A with a leg dispersing lenses 24.

On the base 41 is put reflective sheet 42, in horizontal projection, having the same base 41 form. As the reflective sheet 42 is a sheet of porous polymer type, similar to that used for the built-in reflective sheet 11. A round through hole N, having a size sufficient to pass through the diffusing lens 24, but insufficient to pass through it built-in reflective sheet 11 made in the reflective sheet 42 so as to correspond to the position of each of the light emitting modules MJ. In addition, a rectangular through hole N to him were a pair of connectors 25, also made in the reflective sheet 42 so as to correspond to the position of each of the pair of connectors 25.

Based on 41 are supporting pins 26 for fixing the scattering plate 43. The support pins 26 in Fig. 1 is not shown. In the present invention each of the support pins 26 is performed with the possibility of placing in position, not in the center region that defines a single cell of the grid formed by the SV is titlecase modules MJ, and on a segment of a straight line connecting a pair of adjacent light-emitting module among the light-emitting modules MJ. In Fig. 2 shows a segment of a straight line L. of Course, a line segment L is imaginary, not real. On a segment of line L, the support pin 26 is placed in position at the same distance from each pair of adjacent light-emitting module among the light-emitting modules MJ on both sides of the support pin 26.

When placing the anchor pin 26 in this way only two light-emitting module MJ, placed on both sides of the bearing pin 26, participate in the formation of shadows from the support pin 26. As shown in Fig. 3, the shadow 26S cast anchor pin 26 on the diffusing plate 43, is a combined form of shadows cast illuminating light of the light emitting modules MJ on both sides of the bearing pin, and is elongated in shape and reduced in size, therefore, the unevenness of brightness of the diffusing plate 43 becomes less noticeable. In addition, since the support pin 26 is placed in a position at the same distance from each of the light emitting modules MJ on both sides of the bearing pin 26, or in one case, the darker the shadow is dropped only on one of both sides of the support pin 26, while the shadow of the same degree of darkness are discarded from both side is n, therefore, the resulting shadow is even less noticeable.

The mounting substrate 21 may be made with the possibility of fixing the support pin 26. An example of such structure is shown in Fig. 4. At the base of the support pin 26 shown in Fig. 4, has a rim 27, and the portion of the support pin 26 that extends below the rim 27 which is inserted in a through hole made in the mounting substrate 21 through a through hole made in the reflective sheet 42. Despite the fact that the supporting pin 26 is provided in the docking state of the scattering plate 43 prevents the separation of the support pin 26 from the mounting substrate 21, the support pin 26 may be pre-secured to the mounting substrate 21 by using an adhesive material or something similar.

Because the mounting substrate 21 is arranged to secure the support pin 26, the relative positions of the light-emitting module MJ and the support pin 26 can be accurately established, with established mutual arrangement can be maintained constant. Even if because of a change model mounting substrate 21 must be installed on different dimensions base type 41, the same mutual position of the light-emitting module MJ and the support pin 26 can be applied unchanged in the base 41 of a different type and therefore is about, don't worry about the placement of the support pin 26.

It is desirable that the support pin 26 had a high coefficient of reflection of light, at least part of its surface illuminated illuminating light from the light-emitting module MJ. Because of this it is unlikely that the illuminating light from the light-emitting module MJ is absorbed by the supporting pin 26, which allows sufficiently used for illumination of the scattering plate 43 of the light emitted from the light-emitting module MJ.

The light reflectance of the surface of the support pin 26 can be further enhanced if the color of the surface of the support pin 26 is used bright color, especially white. Forming a support pin 26 of polymeric material such as polycarbonate or something similar, which is added to a substance with a high light reflectance, such as titanium oxide, barium sulfate, or something similar, makes it easy to implement in the bearing pin 26 high light reflectance.

In Fig. 5 shows an example configuration of a television receiver, in which is embedded the device 69 display. Television receiver 89 has the configuration in which the device 69 and display unit 92 of the control panel is placed in the enclosure with the front connection part 90 of the casing and the rear part 91 building the sa, in this case relies on the rack 93.

The above-discussed preferred implementation of the present invention. However, the present invention is not limited to the described in this volume and can be implemented in various embodiments within the limits of the invention.

Industrial applicability

The present invention can be widely applied in the illumination device, in which multiple light emitting modules, each of which contains a light-emitting element is located on the grid and is used as the light source and the diffusing plate is exposed to light from this light source. In addition, the present invention can be widely applied in the display device containing the illumination device, and optionally, in a television receiver containing the display device.

The list of reference symbols

49unit backlight
41base
43the scattering plate
MJthe light emitting module
11built-in reflective sheet
21mounting substrate
22led
24diffuser lens
26anchor pin
59LCD panel display
69the display device
89TV receiver

1. The illumination device, comprising:
basis;
the scattering plate is fixed on the base;
a light source that illuminates the scattering plate light, and the light source is formed by placing multiple light emitting modules, each of which includes a light-emitting element placed on the grid on the base; and
anchor pins located on the base for fixing the scattering plate on the base, each of the support pins is located on a segment of a straight line connecting a pair of adjacent light-emitting module among the light-emitting modules.

2. The illumination device according to claim 1, in which each of the light-emitting module includes a diffusing lens that covers from etoileui element.

3. The illumination device according to claim 1, in which the support pin is placed in position at an equal distance from each pair of adjacent light-emitting module among the light-emitting modules on both sides of the bearing pin.

4. The illumination device according to claim 1, in which the support pins are fixed on the mounting substrate, on which is fixed the light emitting element.

5. The illumination device according to claim 1, in which the support pin has a high reflectance of light, at least part of its surface illuminated illuminating light from the light-emitting modules.

6. The illumination device according to claim 5, in which the support pin is formed from a polymeric material, which is added to a substance with a high light reflectance.

7. The illumination device according to claim 1, in which the light-emitting element is an led.

8. A display device, comprising:
the illumination device according to any one of claims 1 to 7; and
a display panel that receives light from the illumination device.

9. The display device of claim 8, in which the display panel is a liquid crystal display panel.

10. Television receiver containing the display device of claim 8.



 

Same patents:

FIELD: electricity.

SUBSTANCE: back light unit (49) for display device (69) equipped with LCD panel (59) contains a frame (41), dissipating plate (43) supported by the frame and point light sources supported by mounting substrates (21) provided at the frame. Point light sources contain LEDs (22) installed at mounting substrates. Mounting substrates (21) are interconnected by connectors (25) thus forming rows (26) of mounting substrates (21). Varieties of rows (26) of mounting substrates (21) are located in parallel; a row (26) of mounting substrates (21) is formed by long and short mounting substrates (21) and location of such long and short mounting substrates (21) is changed to the opposite row-by-row. Positions of connectors (25) are not levelled in a straight line in direction of rows (26) of mounting substrates (21).

EFFECT: providing uniform brightness of the dissipating plate.

23 cl, 10 dwg

FIELD: electricity.

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

EFFECT: achievement of homogeneity of reflection ratio.

16 cl

FIELD: electricity.

SUBSTANCE: 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

Flat panel display // 2390104

FIELD: information technology.

SUBSTANCE: in the screen of a flat panel display represented by the corresponding number of triads of cells in the number of pixels, in each cell after the microlens there neutral micro-optical filters arranged one after the other from the first to the eight, each with the corresponding radiation absorption coefficient on the binary code principle.

EFFECT: reliable operation of the display in colour transfer during prolonged use, achieved by altering the code-to-radiation brightness conversion method.

8 dwg, 1 tbl

Flat panel display // 2320095

FIELD: personal computer hardware, possible use as flat panel display for monitor and television set.

SUBSTANCE: in accordance to the invention, introduced to every element of screen matrix is its own ultra bright white light diode, and each cell of matrix transforms white luminescence of light diode to luminescence of its color accordingly to its 8 bit code with eight semi-transparent mirrors, with usage of piezo-elements as executive elements, with combination of triads of cells in same body.

EFFECT: production of display cells with less than 1ms response time, with 256 gradations of each main color, increased brightness of pixel images for each element of screen matrix and production of resolution on screen in HDTV format.

6 dwg

Flat panel display // 2316133

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

SUBSTANCE: flat panel display includes flat panel screen of corresponding number of cells equal to number of pixels in a frame, and additionally features three channels of color signals, each one of which includes code accumulator and impulse generation block, flat panel screen consists of light diode cells, each one of which includes a matrix consisting of corresponding number of light diodes of three main colors and micro-lens in output end of light diode cell, each light diode has neutral light filter, density of which is determined by association of light diode with corresponding binary bit of code, and 3D-goggles are introduced with infrared receiver on the frame thereof, as well as frequency divider and infrared transmitter on the body of light diode screen.

EFFECT: reduced cell (pixel) control signal response time down to dozens of nanoseconds.

1 tbl, 6 dwg

The invention relates to a device for displaying graphical information

The invention relates to gas-discharge technique and can be used in display systems containing gas discharge display panel AC, in particular, in the color television discharge module

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: electricity.

SUBSTANCE: lighting device 12 comprises multiple point sources 17 of light and a base 14, where point sources of light 17 are placed, which are classified into two or more colour ranges A, B and C, in accordance with light colours. Each colour range is defined by means of a square, each side of which has length equal to 0.01 in the colour schedule of light space of the International Lighting Commission 1931.

EFFECT: reproduction of light of practically even light.

26 cl, 15 dwg

FIELD: electricity.

SUBSTANCE: lighting device includes multiple LED 16, circuit board 17S LED, chassis 14, connection component 60 and reflecting plate 21. LED 16 are installed on circuit board 17S LED. Both plates 17S and 17C LED are attached to chassis 14. Connection component 60 is electrically connects circuit boards 17S and 17C LED between each other. Reflecting plate 21 is put on surface 17A of light sources installation. In the lighting device, connection component 60 is located on surface 17B of attachment of connection component of circuit board 17S LED. Surface 17B of attachment of connection device is opposite to the surface, on which reflecting plate 21 is put.

EFFECT: increasing brightness of reflected light.

23 cl, 22 dwg

FIELD: physics.

SUBSTANCE: device has a holder (11) which attaches a mounting plate (21) to a backlight base (41) while covering at least the edge (21S) of the mounting plate (21) on the backlight base (41), said edge being situated in the direction of the short side of the mounting plate. The surface of the mounting plate covered by the holder has a non-uniform reflection area which can be in form of a connector or a terminal.

EFFECT: improved uniformity of the amount of light from the backlight unit.

21 cl, 39 dwg

FIELD: electricity.

SUBSTANCE: back light unit (49) for display device (69) equipped with LCD panel (59) contains a frame (41), dissipating plate (43) supported by the frame and point light sources supported by mounting substrates (21) provided at the frame. Point light sources contain LEDs (22) installed at mounting substrates. Mounting substrates (21) are interconnected by connectors (25) thus forming rows (26) of mounting substrates (21). Varieties of rows (26) of mounting substrates (21) are located in parallel; a row (26) of mounting substrates (21) is formed by long and short mounting substrates (21) and location of such long and short mounting substrates (21) is changed to the opposite row-by-row. Positions of connectors (25) are not levelled in a straight line in direction of rows (26) of mounting substrates (21).

EFFECT: providing uniform brightness of the dissipating plate.

23 cl, 10 dwg

FIELD: electricity.

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

EFFECT: achievement of homogeneity of reflection ratio.

16 cl

FIELD: physics.

SUBSTANCE: liquid crystal display device includes a first polariser, a second polariser facing the first polariser, a liquid crystal display panel provided between the first polariser and the second polariser, and a first phase plate and a second phase plate provided between the first or second polariser and the liquid crystal display panel. The display panel has a pair of substrates and a liquid crystal layer placed between the pair of substrates, which includes homogeneously aligned liquid crystal molecules. The phase plate includes a liquid crystal film placed in a position where the nematic liquid crystal is hybrid-aligned. Phase difference in the perpendicular direction of the element situated between the first and second polarisers, excluding the liquid crystal layer and the first phase plate, is 120 nm or greater.

EFFECT: reduced inversion of the gray gradation scale in a position where a colour close to black is displayed.

19 cl, 116 dwg

FIELD: physics.

SUBSTANCE: method of modulating optical radiation involves transmitting natural visible light in the wavelength range 350-850 nm at an angle of 5-75°, between the direction of the light and the perpendicular to the surface of the working optical element made from n layers of manganite A1-xBxMnO3 (where n≥1), wherein the trivalent rare-earth metal A is partially substituted with a univalent or divalent metal B with degree of substitution x. Visible light transmitted through and reflected from the working element is modulated under the effect of a control external magnetic field in which is located the working optical element, having giant visible light magnetotransmission and magnetoreflection effect.

EFFECT: wider range of methods of modulating optical radiation, simple design.

2 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: lighting device 12 includes light source 17, housing 14 containing light source 17 and hole 14b for passing of light emitted by light source 17 and optical element 15a provided so that to be directed to light source 17 and close hole 14b. Optical element 15a has various coefficient of reflection lengthwise to light source 17.

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

12 cl, 27 dwg

FIELD: electricity.

SUBSTANCE: rear light unit (49) of display device (69) with liquid-crystal display panel (59) is provided with housing (41), diffusing plate (43) supported by housing, and light source located on housing (41) and emitting light on diffusing plate, and reflective sheet (42) for light reflection in diffusing plate direction. In peripheral part of reflective sheet (42) there formed is sloping surface (42a) reflecting light emitted sideward from the light source in direction of diffusing plate (43). This sloping surface (42a) of reflective sheet (42) is subject to treatment reducing reflection, which is achieved applying to sloping surface (42a) print with higher optical absorption constant, than it is of sloping surface (42a).

EFFECT: providing uniform brightness.

9 cl, 15 dwg

FIELD: electricity.

SUBSTANCE: lighting device 12 comprises multiple point sources 17 of light and a base 14, where point sources of light 17 are placed, which are classified into two or more colour ranges A, B and C, in accordance with light colours. Each colour range is defined by means of a square, each side of which has length equal to 0.01 in the colour schedule of light space of the International Lighting Commission 1931.

EFFECT: reproduction of light of practically even light.

26 cl, 15 dwg

Up!