WO2012176640A1 - Backlight device, display device, and television receiver - Google Patents

Backlight device, display device, and television receiver Download PDF

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Publication number
WO2012176640A1
WO2012176640A1 PCT/JP2012/064878 JP2012064878W WO2012176640A1 WO 2012176640 A1 WO2012176640 A1 WO 2012176640A1 JP 2012064878 W JP2012064878 W JP 2012064878W WO 2012176640 A1 WO2012176640 A1 WO 2012176640A1
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WO
WIPO (PCT)
Prior art keywords
chassis
backlight device
following configuration
heat insulating
guide plate
Prior art date
Application number
PCT/JP2012/064878
Other languages
French (fr)
Japanese (ja)
Inventor
康司 伊藤
Original Assignee
シャープ株式会社
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Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012176640A1 publication Critical patent/WO2012176640A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0085—Means for removing heat created by the light source from the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/009—Positioning aspects of the light source in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133628—Illuminating devices with cooling means

Definitions

  • the present invention relates to a backlight device, a display device including the backlight device, and a television receiver including the display device.
  • a display device that does not emit light itself such as a liquid crystal display panel
  • a backlight device that illuminates the display panel from behind.
  • various types such as a cold cathode tube and a light emitting element are used.
  • Light emitting elements include light emitting diodes (hereinafter referred to as “LEDs”), organic electroluminescent elements, inorganic electroluminescent elements, and the like, but LEDs are now the mainstream.
  • the light source of the backlight device described in Patent Document 1 is also an LED.
  • ⁇ Backlight devices are roughly classified into two types according to the arrangement of light sources.
  • the first is a system in which a light source is placed behind the display panel and the display panel is directly illuminated from behind.
  • a light guide plate is placed behind the display panel, the light source is placed at a position facing the end face of the light guide plate, light from the light source enters the light guide plate from the end face of the light guide plate, and changes the direction within the light guide plate for display.
  • This is a so-called edge light type in which the panel is illuminated from behind.
  • the backlight device described in Patent Document 1 employs an edge light type.
  • a television receiver includes a drive circuit board for display operation of a display panel and lighting operation of a backlight device, which is also a considerable heat source.
  • heat sources exist in various places in this way, the heat distribution becomes uneven in the optical member including the light guide plate, and a difference in thermal expansion occurs, so that the optical member bends or warps.
  • the present invention has been made in view of the above points, and an object of the present invention is to prevent an optical member including a light guide plate from being adversely affected by heat in an edge light type backlight device using the light guide plate.
  • a backlight device includes a light guide plate disposed on a back surface of a display device, and a light source that irradiates light to an end surface of the light guide plate. It is supported by a metal chassis, a heat insulating member is disposed between the optical member including the light guide plate and the chassis, and the chassis is in direct contact with the optical member at a location close to the light source. It is characterized by.
  • the heat insulating member is located at a central portion of the chassis and is interposed between the drive circuit board disposed on the outer surface side of the chassis and the optical member.
  • a convex portion for partitioning the heat insulating member is formed on the chassis, and the convex portion is in contact with the optical member.
  • the heat insulating member is fixed to the chassis with an adhesive element having low thermal conductivity.
  • a hollow portion for reducing the weight of the chassis is formed at an arrangement position of the heat insulating member in the chassis.
  • the hollow portion is closed with a highly rigid member that is lighter than the constituent material of the chassis.
  • the light source is preferably an LED.
  • the heat insulating member is an aluminum multilayer plate in which a synthetic resin foam plate is sandwiched between two aluminum plates.
  • the heat insulating member is made of an aluminum honeycomb structure.
  • the present invention is characterized in that the display device includes the above-described backlight device and a display panel that receives light from the backlight device.
  • the display panel is preferably a liquid crystal display panel.
  • the present invention is also characterized in that it is a television receiver provided with the above-described display device.
  • the light guide plate and the light source for irradiating the end surface thereof are supported by the metal chassis.
  • a heat insulating member is disposed between the optical member including the light guide plate and the chassis, and the chassis directly contacts the optical member at a location near the light source.
  • the metal chassis is in direct contact with the optical member, the heat transferred from the light source to the optical member is further transferred to the chassis and dissipated, and the optical member is cooled. For this reason, a bending, a curvature, softening, etc. of an optical member can be prevented.
  • FIG. 1 is a partial cross-sectional view of a backlight device according to a first embodiment of the present invention.
  • FIG. 3 is an enlarged view of main parts of FIG. 2. It is sectional drawing of the aluminum multilayer board used as a heat insulation member for a backlight apparatus. It is a fragmentary sectional view of the backlight apparatus which concerns on 2nd Embodiment of this invention. It is a perspective view of the chassis of the backlight device according to the second embodiment. It is the figure which attached the heat insulation member to the chassis of FIG. It is a disassembled perspective view of the aluminum honeycomb structure used as a heat insulation member for a backlight device. It is a figure which shows the shape after the assembly of the aluminum honeycomb structure.
  • FIG. 1 shows an exploded perspective view of a display device 10 incorporated in a television receiver.
  • the display device 10 includes a display panel 11, a frame-shaped bezel 12, a panel frame 13, and a back cover 14 (see FIG. 2).
  • the display panel 11 is a liquid crystal display panel.
  • the bezel 12 and the back cover 14 form a space 15 for accommodating the display panel 11, the panel frame 13, and a backlight device described later.
  • the peripheral portion of the display panel 11 is supported by the panel frame 13 and is in close contact with the back surface of the bezel 12.
  • the panel frame 13 holds the display panel 11, maintains a distance between an optical member to be described later and the display panel 11, and plays a role of preventing both from contacting each other. Also, it plays a role of suppressing bending and warping of the optical member.
  • the backlight device 20 combined with the display device 10 includes the following.
  • the chassis 21 is made of steel plate or aluminum plate.
  • the chassis 21 supports the reflection sheet 22, the light guide plate 23, the optical sheet 24, the light source 25, and the heat insulating member 26, and plays a role of dissipating heat generated from the light source 25. Further, it plays a role of maintaining the rigidity of the entire display device 10.
  • the light guide plate 23 is made of acrylic resin or polycarbonate.
  • the light source 25 is opposed to one side of the light guide plate 23, here, one long side.
  • the light source 25 includes a substrate 25a having the same length as the long side of the light guide plate 23, and a plurality of LEDs 25b arranged in a line on the substrate 25a along the length direction of the substrate 25a.
  • the LED 25b faces the end surface of the light guide plate 23 with a narrow gap (for example, about 1.0 mm).
  • the light source 25 is arranged so that the optical axis of the LED 25b coincides with the center of the light guide plate 23 in the thickness direction. Thereby, the ratio that the light from the LED 25b did not enter the light guide plate 23, that is, the light incident loss can be minimized.
  • a drive circuit board 30 (see FIG. 2) is disposed at a position on the rear side of the chassis 21 and at a substantially central portion of the chassis 21.
  • the drive circuit board 30 is for causing the display panel 11 and the light source 25 to perform operations such as display and lighting.
  • the drive circuit board 30 is a heat generating member.
  • a heat insulating member 26 is disposed between the drive circuit board 30 and the optical member.
  • the heat insulating member 26 is a rectangular plate located in the central part of the chassis 21 and slightly smaller than the chassis 21. As the heat insulating member 26 of the first embodiment, an aluminum multilayer plate 31 shown in FIG. 4 is used.
  • the aluminum multilayer plate 31 is obtained by sandwiching a synthetic resin foam plate 31a between two aluminum plates 31b and bonding them with an adhesive.
  • the aluminum multilayer board 31 is used as a heat insulating material for buildings, and in the case of a product having a thickness of 3.0 mm, the specific gravity is as light as 0.74. Moreover, since it heat-insulates with a synthetic resin foam, it is excellent also in heat insulation. High rigidity.
  • the heat insulating member 26 is fixed to the chassis with an adhesive element having a low thermal conductivity, such as an adhesive or a double-sided adhesive tape. Thereby, the heat insulation function of the heat insulation member 26 is strengthened. If the heat insulating member 26 is fixed to the chassis 21 with screws, the fixing is performed at a dispersed point, and it is difficult for the heat insulating member 26 to play a role as a rigid element. On the other hand, if it is fixed in a planar shape with an adhesive or a double-sided adhesive tape, the rigidity of the heat insulating member 26 itself increases the rigidity of the chassis 21 and the rigidity of the display device 10 is improved.
  • an adhesive element having a low thermal conductivity such as an adhesive or a double-sided adhesive tape.
  • the chassis 21 is formed with a convex portion 21a that partitions the place where the heat insulating member 26 is disposed.
  • the convex portion 21 a is formed in a frame shape so as to surround the heat insulating member 26.
  • the convex portion 21 a is in direct contact with the optical member including the light guide plate 23. In the configuration of the first embodiment, the convex portion 21 a contacts the reflection sheet 22.
  • the panel frame 13 is formed with a frame-like convex portion 13a that approaches the light guide plate 23 in a shape corresponding to the convex portion 21a.
  • the convex portion 21a By forming the convex portion 21a, the rigidity of the chassis 21 is improved.
  • the convex portion 21a located near the light source 25 is useful for securing the rigidity of the chassis 21 in the vicinity of the light incident portion of the light guide plate 23 and is large in suppressing the temperature rise of the light incident portion as will be described later. Play a role.
  • the light source 25 and the drive circuit board 30 While the display device 11 is displaying, the light source 25 and the drive circuit board 30 generate heat. Heat generated by the drive circuit board 30 is blocked by the heat insulating member 26, and heat transfer to the optical members such as the reflection sheet 22, the light guide plate 23, and the optical sheet 24 is suppressed. For this reason, the heat distribution in the optical member is kept uniform, and deterioration of display quality due to bending or warping of the optical member due to non-uniform heat distribution can be suppressed.
  • the heat generated when the LED 25b of the light source 25 emits light is considerable, and the heat makes the light incident part of the light guide plate 23 high.
  • the convex portion 21a of the chassis 21 is in direct contact with the optical member including the light guide plate 23, the heat transferred from the light source 25 to the light guide plate 23 is further transferred to the chassis 21 and dissipated from the chassis 21. Due to such a cooling effect by the chassis 21, it is possible to prevent the optical member, in particular, the light guide plate 23 from being bent, warped, or deformed due to softening.
  • the convex portion 21a sandwiches the light guide plate 23 between the convex portion 13a of the panel frame 13, the light guide plate 23 is prevented from moving due to bending or warping due to heat.
  • the optical member By suppressing the optical member from being deformed or moved by heat, it is possible to suppress deterioration of display quality particularly at the light incident portion where the temperature is likely to rise. Further, it is possible to keep the optical axis of the LED 25b and the center of the light guide plate 23 in the thickness direction to keep the light incident loss to a minimum.
  • the light guide plate 23 has been reduced in thickness for the purpose of reducing the weight of the backlight device 20 and reducing the materials used. Accordingly, the light guide plate 23 is easily bent or warped. In particular, it is important to suppress the movement of the light guide plate 23 near the light source 25.
  • the convex part 21a and the convex part 13a are formed in the highly rigid members of the chassis 21 and the panel frame 13 and the light guide plate 23 is sandwiched between these convex parts, the light guide plate 23 is provided. The movement of the can be suppressed firmly.
  • constituent elements of the second embodiment constituent elements that are functionally common to the constituent elements of the first embodiment are denoted by the same reference numerals as used in the description of the first embodiment, and description thereof is omitted.
  • a feature of the second embodiment resides in that a hollow portion 21b is formed at an arrangement location of the heat insulating member 26 surrounded by the convex portion 21a of the chassis 21.
  • the hollow portion 21 b is a rectangle that is slightly smaller than the heat insulating member 26.
  • the chassis 21 is reduced in weight. Although the rigidity of the chassis 21 is lowered, the heat insulating member 26 that closes the hollowed portion 21b compensates for it.
  • an adhesive element such as an adhesive or a double-sided adhesive tape to the portion left in the frame shape around the hollow portion 21b, it is possible to suppress a decrease in rigidity of the chassis 21. it can.
  • the chassis 21 Since the heat insulating member 26 is lighter than the constituent material of the chassis 21, the chassis 21 is lightened. Moreover, since the heat insulating member 26 itself is also highly rigid, the function of the chassis 21 as a rigid member is not greatly impaired.
  • FIG. 8 and 9 show an aluminum honeycomb structure 32.
  • FIG. An aluminum honeycomb structure 32 can also be used as the heat insulating member 26.
  • the aluminum honeycomb structure 32 is formed by sandwiching a honeycomb-shaped honeycomb core 32a formed of an aluminum thin plate between two webs 32b which are also formed of an aluminum thin plate, and joined by means such as welding.
  • the aluminum honeycomb structure 32 can be light and highly rigid as compared with an aluminum plate having the same thickness, and exhibits an excellent heat insulating effect because the inside is almost hollow. Because of having such characteristics, the aluminum honeycomb structure 32 is particularly effective when combined with the chassis 21 provided with the hollow portion 21b as in the second embodiment.
  • the present invention is widely applicable to a backlight device including a light guide plate, a light source that irradiates light to the end face of the light guide plate, and a metal chassis that supports the light source. Further, it can be widely used for a display device including the backlight device and a television receiver including the display device.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

A display device (10), which is provided with a display panel (11) such as a liquid crystal panel, is combined with a backlight device (20). The backlight device is provided with a metal chassis (21), a light guide plate (23) that is arranged at the back of the display panel, and a light source (25) that irradiates an end face of the light guide plate with light. A heat insulating member (26) is arranged between the chassis and an optical member that comprises the light guide plate, and the chassis is in direct contact with the optical member at a position near the light source. The chassis is provided with a projected portion (21a) that defines the position where the heat insulating member is arranged, and the projected portion is in contact with the optical member. The heat insulating member is affixed to the chassis with an adhesive element that has low thermal conductivity.

Description

バックライト装置、表示装置、およびテレビジョン受像機Backlight device, display device, and television receiver
　本発明は、バックライト装置、前記バックライト装置を含む表示装置、及び前記表示装置を備えるテレビジョン受像機に関する。 The present invention relates to a backlight device, a display device including the backlight device, and a television receiver including the display device.
　自らは発光しない表示パネル、例えば液晶表示パネルを使用する表示装置には、通常、表示パネルを背後から照らすバックライト装置が組み合わせられる。この種のバックライト装置の光源には、冷陰極管や発光素子など、様々な種類のものが用いられる。発光素子には、発光ダイオード（以下「ＬＥＤ」と称する）、有機エレクトロルミネセンス素子、無機エレクトロルミネセンス素子などがあるが、現今ではＬＥＤが主流となっている。特許文献１に記載されたバックライト装置の光源もＬＥＤである。 A display device that does not emit light itself, such as a liquid crystal display panel, is usually combined with a backlight device that illuminates the display panel from behind. As a light source of this type of backlight device, various types such as a cold cathode tube and a light emitting element are used. Light emitting elements include light emitting diodes (hereinafter referred to as “LEDs”), organic electroluminescent elements, inorganic electroluminescent elements, and the like, but LEDs are now the mainstream. The light source of the backlight device described in Patent Document 1 is also an LED.
　バックライト装置は光源の配置により２方式に大別される。その１は表示パネルの背後に光源を置き、表示パネルを背後から直接照らす方式である。その２は、表示パネルの背後に導光板を置き、光源は導光板の端面に向き合う位置に置き、光源からの光が導光板の端面から導光板に入り、導光板内で向きを変えて表示パネルを背後から照らす方式、いわゆるエッジライト式である。特許文献１に記載されたバックライト装置ではエッジライト式が採用されている。 ¡Backlight devices are roughly classified into two types according to the arrangement of light sources. The first is a system in which a light source is placed behind the display panel and the display panel is directly illuminated from behind. Second, a light guide plate is placed behind the display panel, the light source is placed at a position facing the end face of the light guide plate, light from the light source enters the light guide plate from the end face of the light guide plate, and changes the direction within the light guide plate for display. This is a so-called edge light type in which the panel is illuminated from behind. The backlight device described in Patent Document 1 employs an edge light type.
特開２０１０－７２２６２号公報JP 2010-72262 A
　近年のテレビジョン受像機は、バックライト装置を備えた表示パネルを組み込んだものが主流になっている。表示パネルが大型であれば、バックライト装置にも大型で大光量のものが必要になる。光量を増やすためには光源の出力を上げる必要があるが、そうすると光源が大きな熱源となってしまう。またテレビジョン受像機は表示パネルの表示動作やバックライト装置の点灯動作などのための駆動回路基板を備えるが、これもかなりの熱源となる。このように各所に熱源が存在すると、導光板を含む光学部材において熱分布が不均一になり、熱膨張に差が生じるため、光学部材が撓んだり、反ったりする。また導光板の端面と光源との間隔はごく狭いため、光源との直接接触はないにせよ、導光板の中で光源に向き合っている部分が高温になり、その部分が撓んだり、反ったり、軟化して変形したり、劣化したりする。このような熱の弊害を排除する方策は、特許文献１には記載されていない。 Recently, television receivers incorporating a display panel equipped with a backlight device have become mainstream. If the display panel is large, the backlight device must be large and have a large amount of light. In order to increase the amount of light, it is necessary to increase the output of the light source, but in that case, the light source becomes a large heat source. A television receiver includes a drive circuit board for display operation of a display panel and lighting operation of a backlight device, which is also a considerable heat source. When heat sources exist in various places in this way, the heat distribution becomes uneven in the optical member including the light guide plate, and a difference in thermal expansion occurs, so that the optical member bends or warps. In addition, since the distance between the end face of the light guide plate and the light source is very narrow, even if there is no direct contact with the light source, the portion of the light guide plate facing the light source becomes hot, and that portion is bent or warped. , Soften and deform or deteriorate. A method for eliminating such adverse effects of heat is not described in Patent Document 1.
　本発明は上記の点に鑑みなされたものであり、導光板を用いるエッジライト式のバックライト装置において、導光板を含む光学部材が熱による悪影響を受けないようにすることを目的とする。 The present invention has been made in view of the above points, and an object of the present invention is to prevent an optical member including a light guide plate from being adversely affected by heat in an edge light type backlight device using the light guide plate.
　上記目的を達成するため、本発明に係るバックライト装置は、表示装置の背面に配置された導光板と、前記導光板の端面に光を照射する光源とを備え、前記導光板と前記光源は金属製のシャーシに支持されるものであり、前記導光板を含む光学部材と前記シャーシの間に断熱部材が配置されるとともに、前記シャーシは前記光源に近い箇所で前記光学部材に直接接触することを特徴としている。 In order to achieve the above object, a backlight device according to the present invention includes a light guide plate disposed on a back surface of a display device, and a light source that irradiates light to an end surface of the light guide plate. It is supported by a metal chassis, a heat insulating member is disposed between the optical member including the light guide plate and the chassis, and the chassis is in direct contact with the optical member at a location close to the light source. It is characterized by.
　上記構成のバックライト装置において、前記断熱部材は前記シャーシの中央部分に位置し、前記シャーシの外面側に配置された駆動回路基板と前記光学部材の間に介在することが好ましい。 In the backlight device configured as described above, it is preferable that the heat insulating member is located at a central portion of the chassis and is interposed between the drive circuit board disposed on the outer surface side of the chassis and the optical member.
　上記構成のバックライト装置において、前記シャーシには前記断熱部材の配置箇所を区画する凸部が形成され、前記凸部が前記光学部材に接触することが好ましい。 In the backlight device having the above-described configuration, it is preferable that a convex portion for partitioning the heat insulating member is formed on the chassis, and the convex portion is in contact with the optical member.
　上記構成のバックライト装置において、前記断熱部材は、熱伝導率の低い粘着要素で前記シャーシに固定されることが好ましい。 In the backlight device configured as described above, it is preferable that the heat insulating member is fixed to the chassis with an adhesive element having low thermal conductivity.
　上記構成のバックライト装置において、前記シャーシにおける前記断熱部材の配置箇所には、当該シャーシを軽量化するためのくりぬき部が形成されていることが好ましい。 In the backlight device having the above-described configuration, it is preferable that a hollow portion for reducing the weight of the chassis is formed at an arrangement position of the heat insulating member in the chassis.
　上記構成のバックライト装置において、前記くりぬき部が、前記シャーシの構成材料よりも軽量である高剛性部材で閉塞されることが好ましい。 In the backlight device configured as described above, it is preferable that the hollow portion is closed with a highly rigid member that is lighter than the constituent material of the chassis.
　上記構成のバックライト装置において、前記光源はＬＥＤからなることが好ましい。 In the backlight device configured as described above, the light source is preferably an LED.
　上記構成のバックライト装置において、前記断熱部材が合成樹脂発泡体の板を２枚のアルミニウム板で挟んだアルミニウム複層板からなることが好ましい。 In the backlight device having the above-described configuration, it is preferable that the heat insulating member is an aluminum multilayer plate in which a synthetic resin foam plate is sandwiched between two aluminum plates.
　上記構成のバックライト装置において、前記断熱部材がアルミニウム製ハニカム構造体からなることが好ましい。 In the backlight device configured as described above, it is preferable that the heat insulating member is made of an aluminum honeycomb structure.
　また本発明は、上述のバックライト装置と、前記バックライト装置からの光を受ける表示パネルとを含む表示装置であることを特徴としている。 Further, the present invention is characterized in that the display device includes the above-described backlight device and a display panel that receives light from the backlight device.
　上記構成の表示装置において、前記表示パネルが液晶表示パネルであることが好ましい。 In the display device configured as described above, the display panel is preferably a liquid crystal display panel.
　また本発明は、上述の表示装置を備えるテレビジョン受像機であることを特徴としている。 The present invention is also characterized in that it is a television receiver provided with the above-described display device.
　本発明によると、導光板及びその端面に光を照射する光源は金属製のシャーシに支持される。導光板を含む光学部材とシャーシの間には断熱部材が配置されるが、シャーシは光源に近い箇所では光学部材に直接接触する。光学部材に金属製のシャーシが直接接触することにより、光源から光学部材に伝わった熱はさらにシャーシへと伝わって放散され、光学部材は冷却される。このため、光学部材の撓み、反り、軟化などを防止することができる。 According to the present invention, the light guide plate and the light source for irradiating the end surface thereof are supported by the metal chassis. A heat insulating member is disposed between the optical member including the light guide plate and the chassis, and the chassis directly contacts the optical member at a location near the light source. When the metal chassis is in direct contact with the optical member, the heat transferred from the light source to the optical member is further transferred to the chassis and dissipated, and the optical member is cooled. For this reason, a bending, a curvature, softening, etc. of an optical member can be prevented.
バックライト装置を備えた表示装置の分解斜視図である。It is a disassembled perspective view of the display apparatus provided with the backlight apparatus. 本発明の第１実施形態に係るバックライト装置の部分断面図である。1 is a partial cross-sectional view of a backlight device according to a first embodiment of the present invention. 図２の要部拡大図である。FIG. 3 is an enlarged view of main parts of FIG. 2. バックライト装置に断熱部材として用いられるアルミニウム複層板の断面図である。It is sectional drawing of the aluminum multilayer board used as a heat insulation member for a backlight apparatus. 本発明の第２実施形態に係るバックライト装置の部分断面図である。It is a fragmentary sectional view of the backlight apparatus which concerns on 2nd Embodiment of this invention. 第２実施形態に係るバックライト装置のシャーシの斜視図である。It is a perspective view of the chassis of the backlight device according to the second embodiment. 図６のシャーシに断熱部材を添えて示した図である。It is the figure which attached the heat insulation member to the chassis of FIG. バックライト装置に断熱部材として用いられるアルミニウム製ハニカム構造体の分解斜視図である。It is a disassembled perspective view of the aluminum honeycomb structure used as a heat insulation member for a backlight device. アルミニウム製ハニカム構造体の組立後の形状を示す図である。It is a figure which shows the shape after the assembly of the aluminum honeycomb structure.
　図１にはテレビジョン受像機に組み込まれる表示装置１０が分解斜視図の形で示されている。表示装置１０は、表示パネル１１、額縁状のベゼル１２、パネルフレーム１３、及び裏蓋１４（図２参照）を備える。表示パネル１１は液晶表示パネルである。図２及び図３に示す通り、ベゼル１２と裏蓋１４は、表示パネル１１とパネルフレーム１３、及び後述のバックライト装置を収容する空間１５を形成する。表示パネル１１の周縁部分はパネルフレーム１３に支持され、ベゼル１２の裏面に密着する。 FIG. 1 shows an exploded perspective view of a display device 10 incorporated in a television receiver. The display device 10 includes a display panel 11, a frame-shaped bezel 12, a panel frame 13, and a back cover 14 (see FIG. 2). The display panel 11 is a liquid crystal display panel. As shown in FIGS. 2 and 3, the bezel 12 and the back cover 14 form a space 15 for accommodating the display panel 11, the panel frame 13, and a backlight device described later. The peripheral portion of the display panel 11 is supported by the panel frame 13 and is in close contact with the back surface of the bezel 12.
　パネルフレーム１３は、表示パネル１１を保持し、後述する光学部材と表示パネル１１の距離を保ち、両者が接触しないようにする役割を担う。また光学部材の撓みや反りを抑制する役割を担う。パネルフレーム１３の材料としてはポリカーボネートなどが使用される。 The panel frame 13 holds the display panel 11, maintains a distance between an optical member to be described later and the display panel 11, and plays a role of preventing both from contacting each other. Also, it plays a role of suppressing bending and warping of the optical member. As the material of the panel frame 13, polycarbonate or the like is used.
　表示装置１０に組み合わせられるバックライト装置２０には次のものが含まれる。金属製のシャーシ２１、反射シート２２（図３参照）、導光板２３、拡散シートなどの光学シート２４、光源２５、及び断熱部材２６である。 The backlight device 20 combined with the display device 10 includes the following. A metal chassis 21, a reflection sheet 22 (see FIG. 3), a light guide plate 23, an optical sheet 24 such as a diffusion sheet, a light source 25, and a heat insulating member 26.
　シャーシ２１には鋼板やアルミニウム板が使用される。シャーシ２１は、反射シート２２、導光板２３、光学シート２４、光源２５、及び断熱部材２６を支持するとともに、光源２５から発生する熱を放散させる役割を担う。さらには表示装置１０全体の剛性を保つ役割を担う。 The chassis 21 is made of steel plate or aluminum plate. The chassis 21 supports the reflection sheet 22, the light guide plate 23, the optical sheet 24, the light source 25, and the heat insulating member 26, and plays a role of dissipating heat generated from the light source 25. Further, it plays a role of maintaining the rigidity of the entire display device 10.
　導光板２３はアクリル樹脂やポリカーボネートなどにより形成される。導光板２３の一辺に、ここでは一方の長辺に、光源２５が対峙している。光源２５は、導光板２３の長辺とほぼ同じ長さの基板２５ａと、基板２５ａの長さ方向に沿って基板２５ａ上に一列に配置された複数のＬＥＤ２５ｂにより構成される。ＬＥＤ２５ｂは導光板２３の端面に対し狭い（例えば１．０ｍｍ程度の）隙間を隔てて向き合う。 The light guide plate 23 is made of acrylic resin or polycarbonate. The light source 25 is opposed to one side of the light guide plate 23, here, one long side. The light source 25 includes a substrate 25a having the same length as the long side of the light guide plate 23, and a plurality of LEDs 25b arranged in a line on the substrate 25a along the length direction of the substrate 25a. The LED 25b faces the end surface of the light guide plate 23 with a narrow gap (for example, about 1.0 mm).
　光源２５は、ＬＥＤ２５ｂの光軸が導光板２３の肉厚方向の中心と一致するように配置される。これにより、ＬＥＤ２５ｂからの光が導光板２３に入光しなかった割合、すなわち入光損失を最小限にすることができる。 The light source 25 is arranged so that the optical axis of the LED 25b coincides with the center of the light guide plate 23 in the thickness direction. Thereby, the ratio that the light from the LED 25b did not enter the light guide plate 23, that is, the light incident loss can be minimized.
　シャーシ２１の背面側であって、シャーシ２１のほぼ中央部となる箇所には駆動回路基板３０（図２参照）が配置される。駆動回路基板３０は、表示パネル１１や光源２５に表示や点灯などの動作を行わせるためのものである。 A drive circuit board 30 (see FIG. 2) is disposed at a position on the rear side of the chassis 21 and at a substantially central portion of the chassis 21. The drive circuit board 30 is for causing the display panel 11 and the light source 25 to perform operations such as display and lighting.
　駆動回路基板３０は発熱部材である。駆動回路基板３０から発生する熱が反射シート２２、導光板２３、光学シート２４といった光学部材に伝わらないようにするため、駆動回路基板３０と光学部材の間に断熱部材２６が配置される。 The drive circuit board 30 is a heat generating member. In order to prevent heat generated from the drive circuit board 30 from being transmitted to the optical members such as the reflection sheet 22, the light guide plate 23, and the optical sheet 24, a heat insulating member 26 is disposed between the drive circuit board 30 and the optical member.
　断熱部材２６は、シャーシ２１の中央部分に位置する、シャーシ２１より一回り小さい矩形の板である。第１実施形態の断熱部材２６としては、図４に示すアルミニウム複層板３１が用いられる。 The heat insulating member 26 is a rectangular plate located in the central part of the chassis 21 and slightly smaller than the chassis 21. As the heat insulating member 26 of the first embodiment, an aluminum multilayer plate 31 shown in FIG. 4 is used.
　アルミニウム複層板３１は、合成樹脂発泡体の板３１ａを２枚のアルミニウム板３１ｂで両側から挟み、接着剤で貼り合わせたものである。アルミニウム複層板３１は、建築物の断熱材として使用されており、厚みが３．０ｍｍの製品の場合、比重が０．７４と軽い。また合成樹脂発泡体で断熱を行うため、断熱性にも優れている。剛性も高い。 The aluminum multilayer plate 31 is obtained by sandwiching a synthetic resin foam plate 31a between two aluminum plates 31b and bonding them with an adhesive. The aluminum multilayer board 31 is used as a heat insulating material for buildings, and in the case of a product having a thickness of 3.0 mm, the specific gravity is as light as 0.74. Moreover, since it heat-insulates with a synthetic resin foam, it is excellent also in heat insulation. High rigidity.
　断熱部材２６は熱伝導率の低い粘着要素、例えば接着剤や両面粘着テープでシャーシに固定される。これにより、断熱部材２６の断熱機能が強化される。断熱部材２６をねじでシャーシ２１に固定するものとすれば、固定が分散した点で行われることになり、断熱部材２６に剛性要素としての役割を担わせることは困難である。これに対し、接着剤や両面粘着テープで面状に固定すれば、断熱部材２６自身の剛性がシャーシ２１の剛性を増強し、表示装置１０の剛性が向上する。 The heat insulating member 26 is fixed to the chassis with an adhesive element having a low thermal conductivity, such as an adhesive or a double-sided adhesive tape. Thereby, the heat insulation function of the heat insulation member 26 is strengthened. If the heat insulating member 26 is fixed to the chassis 21 with screws, the fixing is performed at a dispersed point, and it is difficult for the heat insulating member 26 to play a role as a rigid element. On the other hand, if it is fixed in a planar shape with an adhesive or a double-sided adhesive tape, the rigidity of the heat insulating member 26 itself increases the rigidity of the chassis 21 and the rigidity of the display device 10 is improved.
　シャーシ２１には、断熱部材２６の配置場所を区画する凸部２１ａが形成されている。凸部２１ａは断熱部材２６を囲むように額縁状に形成されている。凸部２１ａは導光板２３を含む光学部材に直接接触する。第１実施形態の構成では、凸部２１ａは反射シート２２に接触する。パネルフレーム１３には、凸部２１ａに対応する形で、導光板２３に接近する額縁状の凸部１３ａが形成されている。 The chassis 21 is formed with a convex portion 21a that partitions the place where the heat insulating member 26 is disposed. The convex portion 21 a is formed in a frame shape so as to surround the heat insulating member 26. The convex portion 21 a is in direct contact with the optical member including the light guide plate 23. In the configuration of the first embodiment, the convex portion 21 a contacts the reflection sheet 22. The panel frame 13 is formed with a frame-like convex portion 13a that approaches the light guide plate 23 in a shape corresponding to the convex portion 21a.
　凸部２１ａを形成したことにより、シャーシ２１の剛性が向上する。光源２５に近い箇所に存在する凸部２１ａは、導光板２３の入光部付近におけるシャーシ２１の剛性を確保するのに役立つとともに、後述する通り、入光部の温度上昇を抑制するのに大きな役割を果たす。 By forming the convex portion 21a, the rigidity of the chassis 21 is improved. The convex portion 21a located near the light source 25 is useful for securing the rigidity of the chassis 21 in the vicinity of the light incident portion of the light guide plate 23 and is large in suppressing the temperature rise of the light incident portion as will be described later. Play a role.
　図２及び図３に示す組立状態の表示装置１０において、光源２５を点灯すると、ＬＥＤ２５ｂから光が出射する。出射した光は導光板２３の端面を照らし、そこから導光板２３に入光する。光は導光板２３の内部で向きを変え、表示パネル１１を背面から照射する。これにより表示パネル１１に明るい画像が浮かび上がる。 In the assembled display device 10 shown in FIGS. 2 and 3, when the light source 25 is turned on, light is emitted from the LED 25b. The emitted light illuminates the end face of the light guide plate 23 and enters the light guide plate 23 from there. The light changes its direction inside the light guide plate 23 and irradiates the display panel 11 from the back side. As a result, a bright image appears on the display panel 11.
　表示装置１１が表示を行っている間、光源２５と駆動回路基板３０は熱を発生する。駆動回路基板３０が発生する熱は断熱部材２６で遮断され、反射シート２２、導光板２３、光学シート２４などの光学部材への伝熱は抑制される。このため、光学部材における熱分布が均一に保たれ、熱分布の不均一から来る光学部材の撓みや反りなどによる表示品位の悪化を抑制することができる。 While the display device 11 is displaying, the light source 25 and the drive circuit board 30 generate heat. Heat generated by the drive circuit board 30 is blocked by the heat insulating member 26, and heat transfer to the optical members such as the reflection sheet 22, the light guide plate 23, and the optical sheet 24 is suppressed. For this reason, the heat distribution in the optical member is kept uniform, and deterioration of display quality due to bending or warping of the optical member due to non-uniform heat distribution can be suppressed.
　光源２５のＬＥＤ２５ｂが発光することに伴う発熱も相当なものであり、その熱は導光板２３の入光部を高熱にする。しかしながらこの箇所では、シャーシ２１の凸部２１ａが導光板２３を含む光学部材に直接接触しているので、光源２５から導光板２３に伝わった熱はさらにシャーシ２１に伝わってシャーシ２１より放散する。このようなシャーシ２１による冷却効果のため、光学部材、中でも導光板２３の撓み、反り、軟化による変形などを防止することができる。 The heat generated when the LED 25b of the light source 25 emits light is considerable, and the heat makes the light incident part of the light guide plate 23 high. However, at this location, since the convex portion 21a of the chassis 21 is in direct contact with the optical member including the light guide plate 23, the heat transferred from the light source 25 to the light guide plate 23 is further transferred to the chassis 21 and dissipated from the chassis 21. Due to such a cooling effect by the chassis 21, it is possible to prevent the optical member, in particular, the light guide plate 23 from being bent, warped, or deformed due to softening.
　凸部２１ａはパネルフレーム１３の凸部１３ａとの間で導光板２３を挟んでいるから、導光板２３が熱による撓みや反りで動くことが抑制される。このように、光学部材が熱で変形したり、動いたりすることが抑制されることにより、特に温度が上昇しやすい入光部の箇所において、表示品位の悪化を抑制することができる。またＬＥＤ２５ｂの光軸と導光板２３の肉厚方向の中心との一致を保ち、入光損失を最小限に保つことができる。 Since the convex portion 21a sandwiches the light guide plate 23 between the convex portion 13a of the panel frame 13, the light guide plate 23 is prevented from moving due to bending or warping due to heat. Thus, by suppressing the optical member from being deformed or moved by heat, it is possible to suppress deterioration of display quality particularly at the light incident portion where the temperature is likely to rise. Further, it is possible to keep the optical axis of the LED 25b and the center of the light guide plate 23 in the thickness direction to keep the light incident loss to a minimum.
　近年、バックライト装置２０の軽量化を進める目的で、また使用材料を削減する目的で、導光板２３は薄型化されている。それだけ導光板２３は撓んだり、反ったりしやすくなっており、特に光源２５に近い箇所において、導光板２３の動きを抑制することが重要になる。本実施形態では、シャーシ２１とパネルフレーム１３という、いずれも高い剛性を有する部材に凸部２１ａと凸部１３ａを形成し、これらの凸部間に導光板２３を挟んでいるから、導光板２３の動きをしっかりと抑制することができる。 In recent years, the light guide plate 23 has been reduced in thickness for the purpose of reducing the weight of the backlight device 20 and reducing the materials used. Accordingly, the light guide plate 23 is easily bent or warped. In particular, it is important to suppress the movement of the light guide plate 23 near the light source 25. In this embodiment, since the convex part 21a and the convex part 13a are formed in the highly rigid members of the chassis 21 and the panel frame 13 and the light guide plate 23 is sandwiched between these convex parts, the light guide plate 23 is provided. The movement of the can be suppressed firmly.
　図５から図７に第２実施形態を示す。第２実施形態の構成要素の中で、第１実施形態の構成要素と機能的に共通する構成要素には第１実施形態の説明で用いたのと同じ符号を付し、説明は省略する。 5 to 7 show a second embodiment. Among the constituent elements of the second embodiment, constituent elements that are functionally common to the constituent elements of the first embodiment are denoted by the same reference numerals as used in the description of the first embodiment, and description thereof is omitted.
　第２実施形態の特徴は、シャーシ２１の、凸部２１ａで囲まれた断熱部材２６の配置箇所に、くりぬき部２１ｂが形成されている点にある。くりぬき部２１ｂは断熱部材２６より一回り小さい矩形とされている。 A feature of the second embodiment resides in that a hollow portion 21b is formed at an arrangement location of the heat insulating member 26 surrounded by the convex portion 21a of the chassis 21. The hollow portion 21 b is a rectangle that is slightly smaller than the heat insulating member 26.
　くりぬき部２１ｂを設けたことにより、シャーシ２１が軽量化される。シャーシ２１の剛性は低下するが、くりぬき部２１ｂを閉塞する断熱部材２６がそれを補う。くりぬき部２１ｂの周囲に額縁状に残された部分に、接着剤や両面粘着テープのような粘着要素で面状に断熱部材２６を固定することにより、シャーシ２１の剛性の低下を抑制することができる。 By providing the hollowed portion 21b, the chassis 21 is reduced in weight. Although the rigidity of the chassis 21 is lowered, the heat insulating member 26 that closes the hollowed portion 21b compensates for it. By fixing the heat insulating member 26 in a planar shape with an adhesive element such as an adhesive or a double-sided adhesive tape to the portion left in the frame shape around the hollow portion 21b, it is possible to suppress a decrease in rigidity of the chassis 21. it can.
　断熱部材２６はシャーシ２１の構成材料よりも軽量であるから、シャーシ２１は軽量化される。しかも、断熱部材２６自身も高剛性なので、シャーシ２１の剛性部材としての機能が大きく損なわれることはない。 Since the heat insulating member 26 is lighter than the constituent material of the chassis 21, the chassis 21 is lightened. Moreover, since the heat insulating member 26 itself is also highly rigid, the function of the chassis 21 as a rigid member is not greatly impaired.
　図８及び図９に示すのはアルミニウム製ハニカム構造体３２である。アルミニウム製ハニカム構造体３２も断熱部材２６として使用することが可能である。 8 and 9 show an aluminum honeycomb structure 32. FIG. An aluminum honeycomb structure 32 can also be used as the heat insulating member 26.
　アルミニウム製ハニカム構造体３２は、アルミニウムの薄板で形成された蜂の巣形状のハニカムコア３２ａを、同じくアルミニウムの薄板からなる２枚のウェブ３２ｂで挟み、溶着等の手段で接合したものである。アルミニウム製ハニカム構造体３２は、厚みが同一のアルミニウム板と比較して、軽量で高剛性とすることができ、しかも、内部がほぼ中空であるため優れた断熱効果を発揮する。このような特性を有するため、アルミニウム製ハニカム構造体３２は、第２実施形態のようにくりぬき部２１ｂを設けたシャーシ２１に組み合わせた場合、特に効果が大きい。 The aluminum honeycomb structure 32 is formed by sandwiching a honeycomb-shaped honeycomb core 32a formed of an aluminum thin plate between two webs 32b which are also formed of an aluminum thin plate, and joined by means such as welding. The aluminum honeycomb structure 32 can be light and highly rigid as compared with an aluminum plate having the same thickness, and exhibits an excellent heat insulating effect because the inside is almost hollow. Because of having such characteristics, the aluminum honeycomb structure 32 is particularly effective when combined with the chassis 21 provided with the hollow portion 21b as in the second embodiment.
　以上、本発明の実施形態につき説明したが、本発明の範囲はこれに限定されるものではなく、発明の主旨を逸脱しない範囲で種々の変更を加えて実施することができる。 The embodiment of the present invention has been described above, but the scope of the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention.
　本発明は、導光板と導光板の端面に光を照射する光源、及びこれらを支持する金属製のシャーシを備えるバックライト装置に広く利用可能である。また、前記バックライト装置を含む表示装置、及び前記表示装置を備えるテレビジョン受像器に広く利用可能である。 The present invention is widely applicable to a backlight device including a light guide plate, a light source that irradiates light to the end face of the light guide plate, and a metal chassis that supports the light source. Further, it can be widely used for a display device including the backlight device and a television receiver including the display device.
　　　１０　表示装置
　　　１１　表示パネル
　　　１２　ベゼル
　　　１３　パネルフレーム
　　　１４　裏蓋
　　　２０　バックライト装置
　　　２１　シャーシ
　　　２２　反射シート
　　　２３　導光板
　　　２４　光学シート
　　　２５　光源
　　　２６　絶縁部材
　　　３０　駆動回路基板
　　　３１　アルミニウム複層板
　　　３２　アルミニウム製ハニカム構造体 DESCRIPTION OF SYMBOLS 10 Display apparatus 11 Display panel 12 Bezel 13 Panel frame 14 Back cover 20 Backlight apparatus 21 Chassis 22 Reflection sheet 23 Light guide plate 24 Optical sheet 25 Light source 26 Insulation member 30 Drive circuit board 31 Aluminum multilayer board 32 Aluminum honeycomb structure

Claims (13)

  1. 　バックライト装置であって、以下の構成を備えるもの：
    　表示装置の背面に配置された導光板と、前記導光板の端面に光を照射する光源とを備え、
    　前記導光板と前記光源は金属製のシャーシに支持されるものであり、
    　前記導光板を含む光学部材と前記シャーシの間に断熱部材が配置されるとともに、
    　前記シャーシは前記光源に近い箇所で前記光学部材に直接接触する。     Backlight device having the following configuration:
    A light guide plate disposed on the back surface of the display device, and a light source for irradiating light to an end surface of the light guide plate,
    The light guide plate and the light source are supported by a metal chassis,
    While a heat insulating member is disposed between the optical member including the light guide plate and the chassis,
    The chassis directly contacts the optical member at a location close to the light source.
  2. 　請求項１のバックライト装置であって、以下の構成を備えるもの：
    　前記断熱部材は前記シャーシの中央部分に位置し、前記シャーシの外面側に配置された駆動回路基板と前記光学部材の間に介在する。     The backlight device of claim 1, comprising the following configuration:
    The heat insulating member is located at a central portion of the chassis, and is interposed between the drive circuit board disposed on the outer surface side of the chassis and the optical member.
  3. 　請求項１のバックライト装置であって、以下の構成を備えるもの：
    　前記シャーシには前記断熱部材の配置箇所を区画する凸部が形成され、前記凸部が前記光学部材に接触する。     The backlight device of claim 1, comprising the following configuration:
    The chassis is formed with a convex portion that divides the location of the heat insulating member, and the convex portion contacts the optical member.
  4. 　請求項１のバックライト装置であって、以下の構成を備えるもの：
    　前記断熱部材は、熱伝導率の低い粘着要素で前記シャーシに固定される。     The backlight device of claim 1, comprising the following configuration:
    The heat insulating member is fixed to the chassis with an adhesive element having low thermal conductivity.
  5. 　請求項１のバックライト装置であって、以下の構成を備えるもの：
    　前記シャーシにおける前記断熱部材の配置箇所には、当該シャーシを軽量化するためのくりぬき部が形成されている。     The backlight device of claim 1, comprising the following configuration:
    A hollow portion for reducing the weight of the chassis is formed at the location of the heat insulating member in the chassis.
  6. 　請求項５のバックライト装置であって、以下の構成を備えるもの：
    　前記くりぬき部が、前記シャーシの構成材料よりも軽量である高剛性部材で閉塞される。     The backlight device according to claim 5, comprising the following configuration:
    The hollow portion is closed with a highly rigid member that is lighter than the constituent material of the chassis.
  7. 　請求項１のバックライト装置であって、以下の構成を備えるもの：
    　前記光源はＬＥＤからなる。     The backlight device of claim 1, comprising the following configuration:
    The light source is an LED.
  8. 　請求項１のバックライト装置であって、以下の構成を備えるもの：
    　前記断熱部材が合成樹脂発泡体の板を２枚のアルミニウム板で挟んだアルミニウム複層板からなる。     The backlight device of claim 1, comprising the following configuration:
    The heat insulating member is composed of an aluminum multilayer plate in which a plate of synthetic resin foam is sandwiched between two aluminum plates.
  9. 　請求項１のバックライト装置であって、以下の構成を備えるもの：
    　前記断熱部材がアルミニウム製ハニカム構造体からなる。     The backlight device of claim 1, comprising the following configuration:
    The heat insulating member is made of an aluminum honeycomb structure.
  10. 　表示装置であって、以下の構成を備えるもの：
    　請求項１から９のいずれかのバックライト装置と、
    　前記バックライト装置からの光を受ける表示パネルと、
    を含む。     A display device having the following configuration:
    The backlight device according to any one of claims 1 to 9,
    A display panel that receives light from the backlight device;
    including.
  11. 　請求項１０の表示装置であって、以下の構成を備えるもの：
    　前記表示パネルが液晶表示パネルである。     The display device according to claim 10, comprising the following configuration:
    The display panel is a liquid crystal display panel.
  12. 　テレビジョン受像器であって、以下の構成を備えるもの：
    　請求項１０の表示装置を備える。     A television receiver having the following configuration:
    A display device according to claim 10 is provided.
  13. 　テレビジョン受像器であって、以下の構成を備えるもの：
    　請求項１１の表示装置を備える。     A television receiver having the following configuration:
    A display device according to claim 11 is provided.
PCT/JP2012/064878 2011-06-21 2012-06-11 Backlight device, display device, and television receiver WO2012176640A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011137671 2011-06-21
JP2011-137671 2011-06-21

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS638928Y2 (en) * 1981-04-17 1988-03-16
JP2006216529A (en) * 2005-02-03 2006-08-17 Samsung Electronics Co Ltd Backlight assembly and display device having the same
JP2006222176A (en) * 2005-02-09 2006-08-24 Tokyo Electron Ltd Substrate heat treatment apparatus
JP2007141854A (en) * 2006-12-18 2007-06-07 Sharp Corp Light source device and its manufacturing method
JP2007328281A (en) * 2006-06-09 2007-12-20 Sharp Corp Display apparatus
JP2011033742A (en) * 2009-07-31 2011-02-17 Funai Electric Co Ltd Liquid crystal display unit and liquid crystal television receiver
JP2011111119A (en) * 2009-11-30 2011-06-09 Topre Corp Hinge mounting member and hinge mounting structure of cold storage chamber door

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS638928Y2 (en) * 1981-04-17 1988-03-16
JP2006216529A (en) * 2005-02-03 2006-08-17 Samsung Electronics Co Ltd Backlight assembly and display device having the same
JP2006222176A (en) * 2005-02-09 2006-08-24 Tokyo Electron Ltd Substrate heat treatment apparatus
JP2007328281A (en) * 2006-06-09 2007-12-20 Sharp Corp Display apparatus
JP2007141854A (en) * 2006-12-18 2007-06-07 Sharp Corp Light source device and its manufacturing method
JP2011033742A (en) * 2009-07-31 2011-02-17 Funai Electric Co Ltd Liquid crystal display unit and liquid crystal television receiver
JP2011111119A (en) * 2009-11-30 2011-06-09 Topre Corp Hinge mounting member and hinge mounting structure of cold storage chamber door

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