JP2009021054A - Illuminating device and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination device used for equipment such as a display device which has an illumination part capable of illuminating the surrounding of the equipment, and can radiate heat generated in the illumination part, and a display device equipped with the illumination device. <P>SOLUTION: The display device is provided with a display unit having an image display face in front, a chassis 4 to support the display unit from the rear, and a plurality of LEDs 5a, 5a... which are driven according to an image displayed in the display unit, and constituted so as to radiate the heat generated in the display unit from the chassis 4. Since the plurality of LEDs 5a, 5a... are installed so that they can transmit heat to the chassis 4, the heat generated in the LEDs 5a, 5a... is diffused from the chassis in the air, and a new heat dissipation plate to radiate the heat from the LEDs 5a, 5a... is not required, and by suppressing an increase in the thickness of the display device, the heat generated in the LEDs 5a, 5a... can be radiated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is an illumination device that is used in a device such as a display device, and has an illumination unit that illuminates the periphery of the device such as a display device.

  In recent years, viewing of AV (audio / visual) content in a general home using a large display device in a so-called home theater environment is becoming widespread.

  When viewing AV content on such a large display device, it is possible to enjoy more powerful images if the room is slightly darkened. At this time, when the brightness difference between the displayed image and the wall behind the display device is large, there is a problem that the eyes are easily tired. Therefore, conventionally, it has been proposed to indirectly illuminate the periphery of the display device with the light reflected from the back surface and / or the peripheral wall of the display device. At this time, by appropriately illuminating the periphery of the image display surface using the illuminating means, the image can be spread and the sense of reality can be enhanced.

  In recent years, in order to further enhance the sense of reality, various display devices including illumination means configured to freely change the color and brightness of light using a light emitting diode (hereinafter referred to as LED) as a light source have been proposed. (For example, refer to Patent Document 1).

The display device disclosed in Patent Document 1 includes illumination means that uses LEDs provided in a frame that is a housing of the display device as a light source so as to illuminate the periphery of the image display surface, and is displayed on the image display surface. The color and brightness of the light emitted by the LED are changed in conjunction with the change in the color information of the image.
JP 2005-251508 A

  The display device disclosed in Patent Document 1 is configured to illuminate the periphery of the image display surface. In such a display device, in order to increase the sense of reality, it is necessary to configure the illumination means with a large number of LEDs in order to effectively produce an image with light from the LEDs. Since about 70% of the power consumption of LED is converted to heat, the amount of heat generated from the LED is large, and the temperature of the LED rises. Therefore, in a display device having such illumination means, the temperature of the LED rises. As a result, the deterioration of the sealing resin is accelerated, the life characteristics of the LED are deteriorated, the light emission efficiency is lowered, and it is difficult to secure a necessary amount of light.

  For this reason, in order to diffuse the heat generated in the LED into the air, it is necessary to provide a heat dissipation mechanism that radiates the heat from the LED. However, in the display device disclosed in Patent Document 1, heat dissipation from the LEDs provided in the display device is not considered at all, and there is a problem in the reliability of the light emitting part of the LED and the display device.

  In addition, there is a demand to reduce the thickness of the display device as much as possible from the viewpoint of effective use of space and securing an optimum viewing distance. However, when the illuminating means is provided with a heat radiating mechanism such as a heat radiating plate in order to suppress the temperature rise of the LED, the thickness of the display device is undesirably increased by the amount of the heat radiating mechanism such as the heat radiating plate.

  The present invention has been made in view of such circumstances, and is an illumination device used for a device such as a display device, and includes an illumination unit configured to illuminate the periphery of the device. An object of the present invention is to provide a lighting device that can dissipate heat generated in the lighting unit and a display device including the lighting device.

  The illuminating device according to the present invention is an illuminating device used for a device such as a display device, and is characterized in that a support body of the device is used as a heat radiating unit that radiates heat from an illuminating unit of the illuminating device.

  By this structure, the illuminating device which concerns on this invention can thermally radiate | emit the heat | fever which generate | occur | produced in the illumination part of the illuminating device to the support body of the apparatus used.

  An illumination device according to the present invention is an illumination device that is used in a device such as a display device and includes an illumination unit that illuminates the periphery of the device, and the illumination unit is attached to a support that supports the device, and The heat from the lighting part is dissipated.

  By this structure, the illuminating device which concerns on this invention can thermally radiate | emit the heat | fever which generate | occur | produced in the illumination part of the illuminating device to the support body of the apparatus used. Further, indirect illumination for illuminating the periphery of the device is possible.

  The illuminating device according to the present invention is characterized in that the illuminating unit is provided on the support via a heat radiator.

  With this configuration, the illuminating device according to the present invention can effectively dissipate the heat of the illumination unit by the support of the device.

  The illuminating device according to the present invention is characterized in that the radiator is configured to form a ventilation path between the illuminating unit and the support.

  With this configuration, the lighting device according to the present invention has a ventilation path formed by a heat radiator between the lighting section and the support, and a part of heat generated in the lighting section is increased in flow velocity in the ventilation path. Since heat is dissipated by transmitting to the substrate, the heat generated in the LED can be dissipated more sufficiently while reducing the thermal load on the support.

  In the illumination device according to the present invention, the illumination unit is an LED light emitting unit.

  With this configuration, the illumination device according to the present invention can easily change the color and brightness of the illumination unit.

  A display device according to the present invention is a display device including any one of the above illumination devices.

  With this configuration, the display device according to the present invention can effectively dissipate heat generated in the illumination unit of the illumination device by the support of the display device. Moreover, indirect lighting that illuminates the display periphery is possible, and by controlling the color and brightness of the lighting device in conjunction with the image display, the viewer can feel the spread of the displayed image and more realistically. You can enjoy full AV content.

  The display device according to the present invention illuminates the periphery of the image display surface according to an image displayed on the display unit, a display unit having an image display surface on the front surface, a support that supports the display unit from the back surface, and the display unit. And a display device configured to dissipate heat generated in the display unit from the support, wherein the LED is provided on the support so as to be capable of transferring heat. To do.

  With this configuration, the display device according to the present invention transfers the LED that illuminates the periphery of the image display surface to the support configured to support the display unit and to dissipate the heat generated in the display unit. The heat generated by the LED and transmitted to the support is diffused into the air from the support together with the heat transmitted from the display unit to the support, thereby suppressing the temperature rise of the LED. is doing. Since the support also serves as a heat radiating plate that radiates heat from the LED, heat generated in the LED can be radiated while suppressing an increase in the thickness of the display device.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to thermally radiate the heat | fever which generate | occur | produced in the illumination part of the illuminating device attached to the support body of apparatuses, such as a display apparatus, effectively.

Hereinafter, the present invention will be described in detail by exemplifying a liquid crystal television and an LED lighting device used for the liquid crystal television based on the drawings showing the embodiments.
(Embodiment 1)
FIG. 1 is a perspective view of a display device in which the illumination device according to Embodiment 1 of the present invention is used as viewed from the back, and FIG. 2 is an exploded perspective view of the display device according to Embodiment 1. FIG.

  In the figure, reference numeral 1 denotes a frame comprising a rectangular frame portion 1a having a rectangular window and four side walls 1b, 1b,... Extending rearward substantially orthogonally from the outer edge of the rectangular frame portion 1a. On the back surface of the rectangular frame portion 1a of the frame 1, columnar fitting protrusions 1c, 1c... Are provided at four corners, respectively.

  As shown in FIG. 1, a rear cover 2 is fitted to the frame 1. As shown in FIG. 2, the rear cover 2 is a flat housing with one opening, a rectangular flat plate 2 a, and four rectangular side walls 2 b, 2 b... Extending forward substantially orthogonally from the outer edge of the rectangular flat plate 2 a. It has. On the side walls 2b, 2b on both sides of the rear cover 2, elongated rectangular windows 2c, 2c for attaching an LED light emitting unit, which will be described later, are formed. An exhaust port 2d made of a plurality of slits is provided on the upper surface of the rear cover 2, and an intake port 2e made of a plurality of slits is provided below the rectangular flat plate 2a of the rear cover 2. Further, on the front surface of the rectangular flat plate 2a of the rear cover 2, fitting holes (not shown) that fit into fitting protrusions 1a, 1a,.

  Inside the exterior material formed by the frame 1 and the rear cover 2, a display unit (display unit) 3 for displaying a television image and a chassis 4 as a support for supporting the display unit 3 are accommodated.

  The display unit 3 is a flat rectangular parallelepiped, and includes a main body 3a having an image display surface on the front surface, and a mounting plate 3b that is provided on the image display surface side of the main body 3a and is a rectangular flat plate having a rectangular window. I have. In the mounting plate 3b, through holes 3c, 3c,... Are formed in extending portions extending in the vertical direction from the four corners, respectively. The main body 3a of the display unit 3 has a known configuration including a liquid crystal panel having an image display surface, an optical sheet, a diffusion plate, and a backlight unit.

  The display unit 3 is supported by a chassis 4 that is a support made of aluminum on the back side of the display unit 3. The chassis 4 has a rectangular flat plate 4a, two rectangular side walls 4b and 4b extending perpendicularly from both ends in the short direction of the rectangular flat plate 4a, and longitudinal ends of the rectangular flat plate 4a and the rectangular side walls 4b and 4b. Formed outwardly in parallel with the rectangular flat plate 4a from edges 4c, 4c having a substantially U-shape formed inward in a direction orthogonal to both ends and the short side ends of the rectangular side walls 4b, 4b .. Are provided. When the display unit 3 is fitted to the chassis 4, the mounting portions 4d, 4d,... Have through-holes 4e, 4e, etc. at positions that coincide with the through-holes 3c, 3c,. Are formed. Further, as the backlight unit, a so-called side edge type structure is adopted in which an LED as a light source of the backlight and a light guide plate for guiding light from the LED are provided, and the LED is arranged on a side surface of the light guide plate. In this case, an LED as a light source of a backlight is attached to the inner surfaces of the two rectangular side walls 4b and 4b.

  LED light emitting portions 5 and 5 for indirect illumination for illuminating the periphery of the image display surface are attached to the edge portions 4c and 4c of the chassis 4, respectively. FIG. 3 is a schematic diagram of the chassis 4 of the display device according to the first embodiment. FIG. 3A is an external view of the chassis 4 as viewed from the back, and FIG. 3B is a cross-sectional view taken along line III-III in FIG.

  As shown in FIG. 3, the illuminating unit that illuminates the periphery of the device includes an LED light emitting unit, and the LED light emitting units 5 and 5 are mounted with, for example, a plurality of LEDs 5a, 5a, and the plurality of LEDs 5a, 5a, and so on. LED substrates 5b, 5b having an elongated rectangular shape, and LED covers 5c, 5c having a bottomed semi-cylindrical shape provided to cover the LEDs 5a, 5a ... on the mounting surface side of the LEDs 5a, 5a ... of the LED boards 5b, 5b; It has.

  The LEDs 5a, 5a,..., Indicated by rectangles in the drawing, are surface-mounted LEDs each comprising an LED element, a sealing resin for sealing the LED element, and input and output electrodes so as to be shielded from the outside air. It is.

  The LED boards 5b and 5b are epoxy resin flat plates containing glass fibers, and are in close contact with the edges 4c and 4c of the chassis 4 over the entire surface of the non-mounting side so that the longitudinal direction is the vertical direction. For example, it is fixed with a screw or the like.

  The LED covers 5c and 5c are made of polycarbonate resin, and a diffusing agent that diffuses light is added. Due to the diffusing agent added in the resin of the LED covers 5c, 5c, a discontinuous change portion of the refractive index exists in the resin, and the light from the LEDs 5a, 5a,. Is scattered, so that the light from the LEDs 5a, 5a.

  As shown in FIG. 2, circuit boards 6, 6... On which a power supply circuit, a control circuit, and the like of the display device are formed are arranged on the rear surface of the chassis 4. In addition, an LED circuit board 7 on which a control circuit, a drive circuit, and the like of the LED light emitting units 5 and 5 are formed is disposed below the back surface of the chassis 4.

  The display device superimposes the display unit 3, the chassis 4 and the rear cover 2 with the positions of the through holes 3c, 3c, 4e, 4e, and fitting holes (not shown) aligned, and displays the frame 1 on the screen. The display unit 3 is covered from the surface side and integrated by fitting the fitting protrusions 1a, 1a... Of the frame 1 into the fitting holes of the rear cover 2. In addition, as shown in FIG. 3, the LED light emission parts 5 and 5 can radiate | emit light toward the exterior of a display apparatus from the rectangular windows 2c and 2c of the rear cover 2 shown with the dashed-two dotted line. It is attached to the edges 4c, 4c of the chassis 4.

  FIG. 4 is a block diagram illustrating a configuration of a control system of the LED light emitting units 5 and 5 for indirect illumination of the display device according to the first embodiment. A display image signal output unit 61 is formed on the circuit board 6, and a sampling circuit 71 formed on the LED circuit board 7 is connected to the display image signal output unit 61. The display image signal output unit 61 receives red (R), green (G), and blue (B) color signals (hereinafter referred to as RGB signals), which are image signals of images received by the display device and displayed on the image display surface. ) And a luminance signal (hereinafter referred to as Y signal) are supplied to the sampling circuit 71.

  The sampling circuit 71 extracts a signal based on a predetermined rule from the RGB signal and the Y signal given by the display image signal output unit 61. For example, the RGB signal and the Y signal of each pixel in the range of the main gaze portion on the image display surface may be extracted, or the remaining portion of the skin color portion such as a human face is removed from the background portion. Therefore, the RGB signal and Y signal of each pixel in the background portion may be extracted, or the RGB signal and Y signal of all the pixels of the image on the image display surface may be extracted.

  An arithmetic circuit 72 formed on the LED circuit board 7 is connected to the sampling circuit 71, and the sampling circuit 71 gives the extracted RGB signal and Y signal to the arithmetic circuit 72. The arithmetic circuit 72 obtains an average value using the given RGB signal and Y signal, obtains appropriate chromaticity and illuminance of indirect illumination based on the obtained average value of the RGB signal and Y signal, and obtains the obtained chromaticity. In addition, a pulse signal having a duty ratio determined to realize illuminance is generated for each RGB single color LED.

  An LED drive circuit 73 formed on the LED circuit board 7 is connected to the arithmetic circuit 72, and the arithmetic circuit 72 gives the generated pulse signal having a duty ratio to the LED drive circuit 73. The LED drive circuit 73 includes a switching element, opens and closes the switching element in accordance with a pulse signal having a given duty ratio, and is supplied to the RGB single-color LEDs 5a, 5a,. Control the current.

  The RGB single-color LEDs 5a, 5a,... Provided in the LED light-emitting sections 5, 5 are respectively dimmed and controlled according to the current supplied by the LED drive circuit 73, and as a result, displayed on the image display surface. The color and brightness of the LEDs 5a, 5a,... For indirect illumination are controlled in conjunction with the color and brightness of the image. The periphery of the image display surface is illuminated in a state where light from the RGB single color LEDs 5a, 5a,.

  FIG. 5 is a diagram schematically showing an indirect illumination mode in the first embodiment. Thus, the light from the LED light emitting units 5 and 5 provided on both sides of the image display surface of the display unit 3 is light of a single color that gradually decreases as the distance from the display device increases, and is in front of the image display surface. Instead of directly entering the viewer's field of view, the viewer enjoys indirect illumination around the display device by the LED light emitting units 5 and 5. As described above, by controlling the color and brightness of the indirect illumination, the viewer can feel the spread of the display image and can enjoy more realistic AV content.

  In the display device including the LED light emitting units 5 and 5 for indirect illumination configured as described above, the display unit is mainly used according to the display of the image and the light emission of the LEDs 5a, 5a. Heat is generated in the backlight unit 3 and the LEDs 5a, 5a. The heat generated in the display unit 3 is transmitted to the chassis 4 that supports the display unit 3 from the back. Further, the heat generated in the LEDs 5a, 5a ... of the LED light emitting sections 5, 5 is transmitted to the chassis 4 via the LED boards 5b, 5b. The air inside the display device is warmed by these heat generations, rises and flows out of the display device through the exhaust port 2d provided on the upper surface of the rear cover 2, while the intake air provided on the lower side of the rear surface of the rear cover 2 External air flows from the opening 2 e and rises along the chassis 4. Due to this natural convection, the heat generated in the LED light emitting units 5 and 5 is diffused into the air from the chassis 4 together with the heat generated in the display unit 3, so that the temperature rise of the LEDs 5 a, 5 a. As described above, since the chassis 4 also serves as a heat radiating portion that radiates heat from the LEDs 5a, 5a ..., heat generated in the LEDs 5a, 5a ... can be radiated while suppressing an increase in the thickness of the display device. .

(Embodiment 2)
FIG. 6 is a schematic view of a chassis of a display device in which the illumination device according to Embodiment 2 of the present invention is used. 6A is an external view of the chassis 4 as viewed from the back, and FIG. 6B is a cross-sectional view taken along line VI-VI in FIG. 6A.

  As shown in FIG. 6, radiators 8, 8... Are interposed between the LED boards 5 b and 5 b of the LED light emitting units 5 and 5 and the edges 4 c and 4 c of the chassis 4. The heat dissipating bodies 8, 8... Are rectangular aluminum prisms having a rectangular cross section, and between the LED boards 5b, 5b (LEDs 5a, 5a) and the chassis 4, a ventilation path extending in parallel with the LED boards 5b, 5b. .. Are formed so as to form 8a, 8a. Since the other configuration is the same as that of the first embodiment shown in FIG. 3, the same reference numerals as those in FIG. 3 are given to the corresponding components, and the detailed description of the configuration is omitted.

  In the display device according to the present embodiment configured as described above, the backlight unit of the display unit 3 mainly responds to the display of images and the light emission of the LEDs 5a, 5a,. Heat is generated in the LEDs 5a, 5a. The heat generated in the display unit 3 is transmitted to the chassis 4 that supports the display unit 3 from the back. Further, the heat generated by the LEDs 5a, 5a ... of the LED light emitting units 5, 5 is transmitted to the chassis 4 via the LED boards 5b, 5b and the heat radiators 8, 8 .... The air inside the display device is warmed by these heat generations, rises and flows out of the display device through the exhaust port 2d provided on the upper surface of the rear cover 2, while the intake air provided on the lower side of the rear surface of the rear cover 2 External air flows from the opening 2e and rises along the chassis 4 and the ventilation paths 8a, 8a. Due to this natural convection, the heat generated in the LED light emitting units 5 and 5 is diffused into the air from the chassis 4 together with the heat generated in the display unit 3, so that the temperature rise of the LEDs 5 a, 5 a. A part of the heat generated in the LEDs 5a, 5a, ... is efficiently transmitted to the air whose flow velocity is increased in the ventilation paths 8a, 8a, so the LEDs 5a, 5a, ... are reduced while reducing the thermal load on the chassis 4. It is possible to further dissipate the heat generated at.

  In the present embodiment, the radiators 8, 8... Form two ventilation paths 8a, 8a... Extending in parallel with the LED boards 5b, 5b between the LED boards 5b, 5b and the chassis 4, respectively. However, the present invention is not limited to this, and it may be configured to form one or three or more ventilation paths, or may be configured to have heat dissipation fins instead of the ventilation paths. Good.

(Embodiment 3)
FIG. 7 is a partial cross-sectional view of a display device in which the illumination device according to Embodiment 3 of the present invention is used. As shown in FIG. 7, transparent glasses 20, 20 having the same shape as the rectangular windows 2 c, 2 c are fitted into the rectangular windows 2 c, 2 c of the rear cover 2. Between the rear cover 2 and the chassis 4, there are elongated rectangular flat plate-like reflecting plates 9, 9... Having substantially the same length as the LED substrates 5b, 5b on both sides of the LED substrates 5b, 5b. It is provided over. The reflection plates 9, 9... Are ultrafine foamed light reflection plates (for example, MCPET (for example, MCPET) having optical properties of high total reflectance (about 98%) and high diffuse reflectance (about 95%) over the visible light region. Registered trademark)). Since the other configuration is the same as that of the first embodiment shown in FIG. 3, the same reference numerals as those in FIG. 3 are given to the corresponding components, and the detailed description of the configuration is omitted.

  In the display device according to the present embodiment configured as described above, when the LEDs 5a, 5a,... Emit light in conjunction with image display, most of the light from the LEDs 5a, 5a,. After being emitted from 20, 20 to the outside, the remaining part is incident on the reflectors 9, 9,..., And after being diffusely reflected in multiple stages at the interface of ultrafine bubbles formed inside the reflectors 9, 9,. The light is emitted from the transparent glasses 20 and 20 to the outside. As a result, the light from the LEDs 5a, 5a... Can be effectively extracted outside the display device without leaking into the display device. Moreover, since the LED light emission part does not protrude from the chassis 2, it contributes to beauty. In addition, a microlens sheet on which a large number of minute lenses are formed is attached to the inner surfaces of the transparent glasses 20 and 20 in order to diffuse the light so that the light irradiated through the transparent glasses 20 and 20 is uniform. May be.

(Embodiment 4)
In the embodiment described above, the side of the image display surface is configured to indirectly illuminate, but it may be configured to indirectly illuminate the upper side in addition to the side. FIG. 8 is a partial cross-sectional view on the back side of a display device in which the illumination device according to Embodiment 4 of the present invention is used. As shown in FIG. 8, on the upper side of the rectangular flat plate 2a of the rear cover 2, an elongated rectangular window 2f is formed over an appropriate length in the left-right direction. A transparent glass 21 having the same shape as the rectangular window 2f is fitted into the rectangular window 2f.

  On the other hand, on the upper side of the rear surface of the chassis 4, a heat dissipating body 18 having an elongated aluminum triangular prism shape having a right-angled cross-sectional shape is disposed so that the inclined surface 18 a of the heat dissipating body 18 faces the transparent glass 21. The longitudinal direction is made to coincide with the left-right direction of the chassis 4, and one surface of the heat radiating body 18 is attached to the rectangular flat plate 4 a of the chassis 4. The shape of the radiator 18 is determined so that one side of the radiator 18 is in contact with the inner surface of the rear cover 2 in the assembled state of the display device.

  An LED substrate 15b on which a plurality of LEDs 15a, 15a,... Are mounted is fixed to the inclined surface 18a of the heat radiating body 18 in close contact with the substantially entire surface on the non-mounted side.

  Between the rear cover 2 and the chassis 4, an elongated rectangular flat plate-like reflection plate 19 having substantially the same length as the LED substrate 15 b is disposed obliquely above the LED substrate 15 b as shown in FIG. 8, as shown in FIG. 8. 2 is provided over substantially the entire length of the LED board 15b so as to surround the LEDs 15a, 15a. The reflection plate 19 is an ultrafine foamed light reflection plate (for example, MCPET (registered trademark)) having optical characteristics of high total reflectance (about 98%) and high diffuse reflectance (about 95%) over the visible light region. ).

  In the display device according to the present embodiment configured as described above, most of the light from the LEDs 15a, 15a,... Is transparent as it is when the LEDs 15a, 15a,. The light is emitted from the glass 21 to the outside, and the remaining portion is reflected by the reflecting plate 19 and then emitted from the transparent glass 21 to the outside. As a result, the light from the LEDs 15a, 15a... Can be effectively extracted outside the display device without leaking into the display device. Further, since the LEDs 15a, 15a,... Are provided on the rear surface of the chassis 4 so as to emit light obliquely upward, the upper side of the image display surface is irradiated with light from the LEDs 15a, 15a,. Can be illuminated to rim. In addition, you may comprise a heat radiator and a chassis so that the ventilation path extended diagonally upwards in parallel with LED board 15b may be formed.

  In the above embodiment, aluminum having good thermal conductivity is used as the material of the chassis and the heat radiating body. However, any other metal having good thermal conductivity can be preferably used. . Moreover, it is not limited to a metal, Resin etc. may be sufficient.

  In the above embodiment, the LED light emitting unit is provided to indirectly illuminate the side and / or upper side of the display screen. However, the present invention is not limited to this, and the lower side of the display screen is indirectly illuminated. It may be provided.

  In the above embodiment, the case where the lighting device for indirect lighting is provided in the display device that performs air cooling by natural convection has been described. However, the present invention is not limited to this, and the lighting device according to the present invention includes a fan. It can also be applied to a display device that is provided inside and performs air cooling by forced convection.

  Moreover, although the illuminating device which used LED for the light emission part was illustrated, a light source is not limited to LED, Even if it is other light sources, such as fluorescent lamps, such as a cold cathode fluorescent lamp (CCFL), and EL (electroluminescence) Good.

  Furthermore, in the above embodiment, the liquid crystal television has been described as an example of the display device. However, the present invention is not limited to this, and the present invention can be applied to display devices such as liquid crystal display devices other than the liquid crystal television, plasma display devices, and EL displays. In addition, it goes without saying that various modifications can be made within the scope of the matters described in the claims.

  Further, the present invention can be applied to devices other than the display device, and a lighting device that can effectively dissipate heat can be obtained by dissipating heat with a support of the device to be used. When used in devices other than display devices, for example, the chromaticity of the illuminating unit of the LED light emitting unit can be changed in conjunction with time information such as time and season, not in conjunction with the display image. Lighting equipment can be used as indirect lighting.

It is the perspective view which looked at the display apparatus which concerns on Embodiment 1 of this invention from the back. 2 is an exploded perspective view of the display device according to Embodiment 1. FIG. 3 is a schematic diagram of a chassis of the display device according to Embodiment 1. FIG. 3 is a block diagram illustrating a configuration of a control system of an LED light emitting unit for indirect illumination of the display device according to Embodiment 1. FIG. It is a figure which shows the aspect of the indirect illumination in Embodiment 1 typically. 5 is a schematic diagram of a chassis of a display device according to Embodiment 2. FIG. It is a fragmentary sectional view of the display apparatus which concerns on Embodiment 3 of this invention. It is a fragmentary sectional view by the side of the back of a display concerning Embodiment 4 of the present invention.

Explanation of symbols

1 Frame 2 Rear cover 2c, 2f Rectangular window 3 Display unit (display unit)
4 Chassis (support, heat dissipation part)
5 LED light emitting part (illumination part)
5a, 15a LED
5b, 15b LED substrate 8, 18 Radiator 8a Ventilation path 9, 19 Reflector 20, 21 Transparent glass

Claims (7)

A lighting device used for a display device or the like,
A lighting device, wherein the support body of the device is used as a heat radiating unit that radiates heat from the lighting unit of the lighting device. An illumination device that is used in a device such as a display device and includes an illumination unit that illuminates the periphery of the device,
The illumination unit is attached to a support body that supports the device, and the support body dissipates heat from the illumination unit.   The illuminating device according to claim 1, wherein the illuminating unit is provided on the support via a heat radiator.   The lighting device according to claim 3, wherein the heat radiating body is configured to form a ventilation path between the lighting unit and the support.   The illumination device according to claim 1, wherein the illumination unit is an LED light emitting unit.   The display apparatus provided with the illuminating device as described in any one of Claims 1-5.   A display unit having an image display surface on the front surface; a support that supports the display unit from the back surface; and an LED that illuminates the periphery of the image display surface in accordance with an image displayed on the display unit. In the display device configured to dissipate heat generated in the unit from the support, the LED is provided on the support so that heat can be transferred.

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