WO2013088783A1 - Display device and television receiver - Google Patents

Display device and television receiver Download PDF

Info

Publication number
WO2013088783A1
WO2013088783A1 PCT/JP2012/070657 JP2012070657W WO2013088783A1 WO 2013088783 A1 WO2013088783 A1 WO 2013088783A1 JP 2012070657 W JP2012070657 W JP 2012070657W WO 2013088783 A1 WO2013088783 A1 WO 2013088783A1
Authority
WO
WIPO (PCT)
Prior art keywords
holding frame
liquid crystal
light
display device
heat spreader
Prior art date
Application number
PCT/JP2012/070657
Other languages
French (fr)
Japanese (ja)
Inventor
智之 市座
譲 生田
啓太 伊藤
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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 WO2013088783A1 publication Critical patent/WO2013088783A1/en

Links

Images

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
    • G02B6/0081—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
    • 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
    • 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

Definitions

  • the present invention relates to an edge light type display device and a television receiver including the display device.
  • a liquid crystal display device provided with a liquid crystal panel as a display panel is thin and lightweight and consumes little power. Therefore, in recent years, liquid crystal display devices have been widely adopted as image display devices for television receivers, computers, and portable terminals.
  • the liquid crystal panel that is a component of the liquid crystal display device does not emit light by itself. Therefore, unlike a self-luminous display device such as a CRT (Cathode Ray Tube), the liquid crystal display device requires a light source unit on the surface.
  • a self-luminous display device such as a CRT (Cathode Ray Tube)
  • the liquid crystal display device requires a light source unit on the surface.
  • the edge light system is a system in which a light guide plate and a cover that supports the light guide plate are arranged on the back side of the liquid crystal panel, and a light source is arranged on the side surface side of the light guide plate.
  • a light source is arranged on the side surface side of the light guide plate.
  • light incident from the side surface of the light guide plate is emitted from one surface of the light guide plate while diffusing in the light guide plate. Therefore, there is an advantage that the front and back thickness of the display device can be reduced as compared with the direct light method in which the light source is arranged on the back side of the diffusion plate.
  • a cold cathode tube has been conventionally used as a light source.
  • LEDs Light Emitting Diodes
  • smaller than cold cathode tubes have been used as light sources.
  • LEDs have the disadvantage that energy conversion efficiency is low and most of the input power is converted into light without being converted to light.
  • the heat generation is 80 degrees or more on the surface of the LED substrate depending on the outside air temperature, so that not only the other parts are affected but also the LED itself may be damaged by the heat. Therefore, when using LED as a light source, it is essential to provide a heat dissipation structure.
  • an LED light source that is, an LED and a metal cover that accommodates the LED are in direct contact with each other. Thereby, the heat generated in the LED is conducted to the cover and is dissipated.
  • the present invention has been made in view of the circumstances as described above, and an object thereof is to provide a display device and the like that can effectively dissipate heat generated in an LED.
  • the display device includes a heat radiator to which a light emitting element that supplies light to a display panel that displays an image on the front side is fixed, a holding frame that holds a peripheral portion of the display panel, and the holding
  • the holding frame body protrudes in a direction substantially perpendicular to the back surface of the display panel and has a long mounting portion in a direction along the side surface of the display panel.
  • the heat dissipating body is placed along the longitudinal direction of the mounting portion, and the heat dissipating body is combined with the cover and the holding frame body.
  • the radiator is combined with the cover and the holding frame, the heat generated in the light emitting element is dissipated from the radiator, the cover, and the holding frame. Therefore, it is possible to efficiently dissipate heat generated in the light emitting element.
  • the display device according to the present invention is characterized in that a heat conductor is interposed between the radiator and the holding frame.
  • the heat conductive sheet is interposed between the radiator and the holding frame, it is possible to increase the amount of heat conducted from the radiator to the holding frame. As a result, the heat generated in the light emitting element can be dissipated more efficiently.
  • a substrate is fixed to the radiator, the light emitting element is mounted on one surface of the substrate, and attribute information about the light emitting element is described on the other surface of the substrate.
  • the surface of the heat radiating body on which the substrate is fixed is provided with an opening at a position corresponding to the position where the attribute information is described.
  • the attribute information about the light emitting element is described on the substrate on which the light emitting element is mounted, and an opening is provided in the radiator corresponding to the described position. It is possible to refer to the attribute information of the light source module without removing it.
  • a television receiver includes the above-described display device and a tuner unit that receives a television broadcast, and displays an image related to the television broadcast received by the tuner unit on the display device. It is characterized by being.
  • the radiator is combined with the cover and the holding frame, the heat generated in the light emitting element is dissipated from the radiator, the cover, and the holding frame. Therefore, it is possible to efficiently dissipate heat generated in the light emitting element.
  • the heat generated in the light emitting element is dissipated from the heat radiating body, the cover, and the holding frame, so that the heat can be efficiently radiated.
  • FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. It is the fragmentary perspective view of the light source module and heat spreader seen from the back side. It is a fragmentary perspective view of the heat spreader by which the light source module seen from the back side was mounted. It is the perspective view which looked at the holding frame from the upper left side.
  • FIG. 10 is a cross-sectional view taken along line XX in FIG. 9. It is the fragmentary perspective view which looked at the member back side of the lower part of the holding frame body in which the heat spreader is mounted from the left side. It is a disassembled perspective view of the liquid crystal television in this Embodiment. It is the fragmentary perspective view which looked at the light source module from the lower side. It is the fragmentary perspective view which looked at the heat spreader from the lower side. It is the fragmentary perspective view which looked at the heat spreader by which the light source module was mounted from the lower side.
  • liquid crystal television including a display device (hereinafter referred to as “liquid crystal television”) is taken as an example.
  • FIG. 1 is a perspective view showing an appearance of a liquid crystal television in the present embodiment.
  • the liquid crystal television includes a liquid crystal panel 1 (display panel), a front cabinet 6, a rear cabinet 12, a stand 15, a tuner unit 16, an image processing unit 17, and a power supply control unit 18.
  • the liquid crystal panel 1 has a substantially rectangular parallelepiped shape and displays an image on the front side.
  • the front cabinet 6 is a rectangular frame and covers the periphery of the liquid crystal panel 1 from the front side.
  • the rear cabinet 12 covers the back side of the liquid crystal panel 1.
  • the stand 15 is for placing the liquid crystal television 1 on a flat surface such as a table.
  • the tuner unit 16 receives a television broadcast and extracts a broadcast signal.
  • the image processing unit 17 extracts image information from the broadcast signal. An image is displayed on the liquid crystal panel 1 based on the extracted image information.
  • the power control unit 18 supplies power of a predetermined voltage to each unit of the liquid crystal television.
  • the side on which the liquid crystal panel 1 of the liquid crystal television is provided is referred to as the front side.
  • the opposite side of the front side is called the back side.
  • the left and right sides of the liquid crystal panel 1 are referred to as the left side and the right side, respectively.
  • the upper and lower sides of the liquid crystal panel 1 are referred to as an upper side and a lower side, respectively.
  • FIG. 2 is a longitudinal sectional view showing a main part of the liquid crystal television.
  • FIG. 2 it is drawn with the front side of the liquid crystal television set facing down.
  • the light guide plate 2 sandwiched between the lens system sheet group 7 from the front side and the light reflecting sheet 8 from the back side is disposed on the back side of the liquid crystal panel 1.
  • the light source module 3 in which the light emitting element 30 is mounted on the base substrate 31 (substrate) is disposed so as to face the side surface in the longitudinal direction of the light guide plate 2.
  • the light source module 3 is fixed to a surface 41 parallel to the light guide plate 2 of the heat spreader 4 (heat radiator).
  • the heat spreader 4 is fixed to a surface (mounting portion) parallel to the light guide plate 2 of the holding frame 5.
  • the liquid crystal panel 1, the heat spreader 4, and the like are sandwiched between the holding frame 5 on the front side of the liquid crystal panel 1 and the backlight chassis 9 (cover) on the back side of the liquid crystal panel 1, and are fixed to the front cabinet 6 with screws 61.
  • the light guide plate 2 is made of a synthetic resin such as acrylic resin, polycarbonate resin, methacrylic resin, or cyclic polyolefin, and is formed in a substantially rectangular shape.
  • the backlight chassis 9 is formed of a metal plate such as a steel plate in a substantially rectangular shape.
  • the backlight chassis 9 covers the liquid crystal panel 1, the light guide plate 2, the light source module 3 and the like from the back side of the liquid crystal television.
  • An elastic member 13 is provided at a portion where the holding frame 5 and the liquid crystal panel 1 are in contact with each other.
  • the elastic member 13 securely fixes the liquid crystal panel 1 and prevents the surface of the liquid crystal panel 1 from being damaged by the holding frame 5.
  • the front cabinet 6 covers the holding frame 5.
  • liquid crystal television configured as described above, light emitted from the light emitting element 30 enters from the side edge of the light guide plate 2. Since there is the light reflecting sheet 8 on the back side of the light guide plate 2, the light traveling in the back side direction of the light guide plate 2 is reflected by the light reflecting sheet 8. The light reflected by the light reflecting sheet 8 irradiates the liquid crystal panel 1 from the back side. The liquid crystal panel 1 is controlled, and an image is displayed on the front side of the liquid crystal panel 1.
  • FIG. 3 is a partial perspective view of the light source module 3 as viewed from the back side.
  • FIG. 4 is a partial perspective view of the heat spreader 4 as seen from the lower rear side.
  • FIG. 5 is a cross-sectional view taken along line VV in FIG.
  • FIG. 6 is a partial perspective view of the light source module 3 and the heat spreader 4 as seen from above.
  • FIG. 7 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as seen from above.
  • FIG. 8 is a perspective view of the holding frame 5 as viewed from the upper left side.
  • the light source module 3 includes a plurality of light emitting elements 30, a strip-like base substrate 31 on which the light emitting elements 30 are mounted, and a connector 32.
  • the light emitting element 30 is an LED.
  • the light emitting elements 30 are juxtaposed along the longitudinal direction of the base substrate 31.
  • the light emitting element 30 is driven by a drive circuit (not shown) to emit light.
  • a drive current for the light emitting element 30 is supplied by a cable connected by a connector 32.
  • the connector 32 is fixed to one end of the base substrate 31.
  • the heat spreader 4 is a rod-shaped member as shown in FIG. 4 and has a substantially U-shaped cross section as shown in FIG.
  • the light source module 3 is placed on the upper portion 41 which is the upper side when attached as shown in FIG.
  • the upper portion 41 is provided with a screw hole 47.
  • the light source module 3 is fixed to the heat spreader 4 by passing the screw 330 through the screw hole 33 and the screw hole 47. In FIG. 7, screws are omitted.
  • the front portion 42 of the heat spreader 4 is continuous with the lower portion 43.
  • the lower portion 43 is discontinuous and is cut at several places. Between the cut
  • the coupling portion 44 is also formed at both end portions of the heat spreader 4.
  • the heat spreader 4 is fixed to the holding frame 5 by screws 61 passing through the screw holes 45 provided in the coupling portion 44.
  • the heat spreader 4 is made of a metal having high thermal conductivity, such as aluminum, and conducts and dissipates heat generated in the light emitting element 30.
  • One surface of the upper portion 41 of the heat spreader 4 is in contact with the light source module 3, and the other surface is in contact with the holding frame 5.
  • each holding frame 5 is formed of a metal plate, for example, a steel plate.
  • the holding frame 5 has a rectangular frame shape in which a lower member 51, a left member 52, an upper member 53, and a right member 54 are coupled by screws.
  • the holding frame 5 holds the liquid crystal panel 1, the light guide plate 2, and the like.
  • FIG. 9 is a perspective view of the lower part of the member 51 constituting the holding frame 5 as viewed from the left side.
  • the lower side of FIG. 9 is the front side of the liquid crystal television.
  • 10 is a cross-sectional view taken along line XX of FIG.
  • FIG. 11 is a partial perspective view of the rear side of the member 51 in the lower portion of the holding frame 5 on which the heat spreader 4 is placed as viewed from the left side.
  • the member 51 includes a plate-like portion 51a extending upward from the lower side parallel to the liquid crystal panel 1 serving as a mounting portion, and a plate-like portion 51b extending to the front side. Further, the member 51 includes a plate-like portion 51c extending upward and continuous to the upper side, a portion 51d projecting toward the back side, that is, the surface of the light guide plate 2 that contacts the liquid crystal panel 1, and a plate-like portion extending upward and continuous thereto. A portion 51e is provided. The member 51 includes a strip-shaped connecting portion 51g extending further upward from the plate-like portion 51e and a connecting portion 51f protruding to the back side at both ends in the left-right direction.
  • the plate-like portions 51 a and 51 b of the member 51 are portions that come into contact with the heat spreader 4.
  • the screw holes 51 h provided in the member 51 are holes through which screws for fixing the backlight chassis 9 and the heat spreader 4 to the member 51 pass.
  • connection part 51g of the member 51 is for connecting the member 51 and the other member 52 or 54 which comprises the holding frame 5 with a screw
  • the liquid crystal television is assembled with the front side down.
  • the holding frame 5 is placed on the front cabinet 6.
  • the liquid crystal panel 1 is placed so that the outer edge portion of the liquid crystal panel 1 contacts the inner edge portion of the holding frame 5.
  • the lens system sheet group 7, the light guide plate 2, and the light reflection sheet 8 are placed on the liquid crystal panel 1.
  • the heat spreader 4 to which the light source module 3 is fixed is placed on a surface parallel to the side edge of the light guide plate 2 of the member 51 of the holding frame 5.
  • the backlight chassis 9 is mounted and fixed to the front cabinet 6 with screws 61.
  • the heat spreader 4 placed on the holding frame 5 is screwed in a form sandwiched between the holding frame 5 and the backlight chassis 9.
  • the tuner unit 16, the image processing unit 17, and the power supply control unit 18 are fixed to the backlight chassis 9, the rear cabinet 12 is covered, and the front cabinet 6 is fixed with screws.
  • FIG. 12 is an exploded perspective view of the liquid crystal television in the present embodiment.
  • a state in which the front cabinet 6, the holding frame 5, the heat spreader 4, and the backlight chassis 9 are fixed with screws 61 is shown.
  • a holding frame 5 is placed on the front cabinet 6.
  • the heat spreader 4 to which the light source module 3 is fixed is placed on the holding frame 5.
  • the backlight chassis 9 is fixed to the front cabinet 6 with the heat spreader 4 and the holding frame 5 interposed therebetween.
  • the tuner unit 16, the image processing unit 17, the power supply control unit 18, and the rear cabinet 12 are omitted.
  • the light source module 3 on which the light emitting element 30 is mounted is fixed to a heat spreader 4 formed of aluminum having high thermal conductivity.
  • the heat spreader 4 is screwed so as to be in close contact with the holding frame 5 and the backlight chassis 9. Thereby, the heat generated in the light emitting element 30 is conducted to the heat spreader 4.
  • the heat conducted to the heat spreader 4 is further dissipated efficiently by being conducted to the holding frame 5 and the backlight chassis 9. Thereby, there is an effect of preventing damage to the light emitting element 30 itself and other components due to heat generated by the light emitting element 30.
  • the heat spreader 4 and the holding frame 5 are screwed, but not limited thereto, and may be fixed with an adhesive or a double-sided tape. Further, in order to increase the amount of heat conducted from the heat spreader 4 to the holding frame 5, a heat conductive sheet (heat conductor) formed of silicon, acrylic resin, carbon fiber or the like is interposed between the heat spreader 4 and the holding frame 5. It is good also as a structure interposed in. Furthermore, a heat conductive sheet may be interposed between the heat spreader 4 and the backlight chassis 9.
  • the light source module 3 uses an LED that emits white light.
  • White LEDs vary in light emission characteristics such as chromaticity or brightness for each LED. Therefore, the manufactured LEDs are managed in a plurality of groups for each characteristic value. Each group is called a rank.
  • the white LED is mounted, the display quality deteriorates when the LEDs having different ranks are mounted in combination, and therefore, it is necessary to mount them in accordance with the rank.
  • FIG. 13A is a partial perspective view of the light source module as viewed from below.
  • FIG. 13B is a partial perspective view of the heat spreader as viewed from below.
  • FIG. 14 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as viewed from below.
  • rank identification information 34 (attribute information) of the light source module 3 is described.
  • the rank identification information 34 is, for example, a character string composed of a barcode, a two-dimensional barcode, or alphanumeric characters.
  • the rank identification information 34 includes at least rank information of LEDs mounted on the light source module 3.
  • the heat spreader 4 is provided with a window (opening) 46 for referring to the rank identification information 34. Accordingly, it is possible to refer to the rank identification information 34 of the light source module 3 without removing the light source module 3 from the heat spreader 4. Since the base substrate 31 of the light source module 3 has low rigidity, it may be damaged when it is removed from the heat spreader 4. Therefore, making it possible to refer to the rank identification information 34 without removing it from the heat spreader 4 has the effect of preventing unnecessary damage to the light source module 3 when checking the rank identification information 34 of the light source module 3 during repair and inspection. Play.
  • the heat spreader 4 is made of aluminum.
  • the heat spreader 4 is not limited thereto, and any material having good heat conductivity may be used.
  • iron or stainless steel From the viewpoint of dissipating heat more efficiently, silver, copper, and the like are preferable, but aluminum, iron, or stainless steel is preferably used in consideration of cost, strength, and ease of processing.
  • the holding frame 5 and the backlight chassis 9 are made of steel plates, aluminum, iron, or stainless steel may be used in order to dissipate heat of the light emitting element 30 better.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Planar Illumination Modules (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

This display device is provided with: a heat spreader (4) which has a light-emitting element (30) attached thereto which supplies light to a liquid crystal panel (1) for displaying images on the front side; a holding frame (5) which holds the periphery of the liquid crystal panel (1); and a backlight chassis (9) which covers the holding frame (5). The holding frame (5) has a mounting part which protrudes in a direction approximately perpendicularly to the back surface of the liquid crystal panel (1), and which is long in the direction along the lateral surface of the liquid crystal panel (1). The heat spreader (4) is mounted along the length direction of the mounting part, and is coupled with the back light chassis (9) and the holding frame (5).

Description

表示装置、及びテレビジョン受像機Display device and television receiver
　本発明はエッジライト方式の表示装置、及び該表示装置を備えたテレビジョン受像機に関する。 The present invention relates to an edge light type display device and a television receiver including the display device.
　液晶パネルを表示パネルとして備える液晶表示装置は、薄形で軽量である上、消費電力が小さい。そのことから、近年、テレビジョン受像機、コンピュータ及び携帯端末用の画像表示装置として、液晶表示装置は広く採用されている。 A liquid crystal display device provided with a liquid crystal panel as a display panel is thin and lightweight and consumes little power. Therefore, in recent years, liquid crystal display devices have been widely adopted as image display devices for television receivers, computers, and portable terminals.
　液晶表示装置の構成部材である液晶パネルは、自ら発光しない。従って、液晶表示装置は、ＣＲＴ（Ｃａｔｈｏｄｅ　Ｒａｙ　Ｔｕｂｅ）などの自発光型の表示装置とは異なり、面上の光源部を必要とする。 The liquid crystal panel that is a component of the liquid crystal display device does not emit light by itself. Therefore, unlike a self-luminous display device such as a CRT (Cathode Ray Tube), the liquid crystal display device requires a light source unit on the surface.
　この光源部の一つの方式として、エッジライト方式がある。エッジライト方式は、液晶パネルの裏側に導光板及び導光板を支持するカバーを配し、導光板の側面側に光源を配する方式である。エッジライト方式は、導光板の側面から入光した光を、導光板内を拡散させながら導光板の一面から出光する。そのため、拡散板の裏側に光源が配される直下ライト方式に比べて表示装置の表裏厚さを薄くすることが可能となる利点がある。 One type of light source unit is an edge light method. The edge light system is a system in which a light guide plate and a cover that supports the light guide plate are arranged on the back side of the liquid crystal panel, and a light source is arranged on the side surface side of the light guide plate. In the edge light system, light incident from the side surface of the light guide plate is emitted from one surface of the light guide plate while diffusing in the light guide plate. Therefore, there is an advantage that the front and back thickness of the display device can be reduced as compared with the direct light method in which the light source is arranged on the back side of the diffusion plate.
　エッジライト方式では、従来、光源として冷陰極管が用いられていた。近年、冷陰極管より小型なＬＥＤ（Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）が光源として使われるようになっている。 In the edge light system, a cold cathode tube has been conventionally used as a light source. In recent years, LEDs (Light Emitting Diodes) smaller than cold cathode tubes have been used as light sources.
　ＬＥＤは、エネルギー変換効率が低く、入力電力の大半が光に変換されずに熱となるという欠点がある。その発熱は外気温によっては、ＬＥＤ基板表面で８０度以上になるため、他の部品に影響を与えるばかりでなく、熱によりＬＥＤ自身が破損する場合がある。そのため、ＬＥＤを光源として使用する場合は、放熱構造を設けることが必須である。 LEDs have the disadvantage that energy conversion efficiency is low and most of the input power is converted into light without being converted to light. The heat generation is 80 degrees or more on the surface of the LED substrate depending on the outside air temperature, so that not only the other parts are affected but also the LED itself may be damaged by the heat. Therefore, when using LED as a light source, it is essential to provide a heat dissipation structure.
　そのような問題に対して、特許文献１に記載された表示装置においては、ＬＥＤ光源、すなわちＬＥＤと、該ＬＥＤを収容する金属製カバーとを直接接触させている。それにより、ＬＥＤに発生する熱がカバーに伝導することにより、放散される。 For such a problem, in the display device described in Patent Document 1, an LED light source, that is, an LED and a metal cover that accommodates the LED are in direct contact with each other. Thereby, the heat generated in the LED is conducted to the cover and is dissipated.
特開２００４－１８６００４号公報JP 2004-186004 A
　ところで、液晶パネルの大型化に伴い、光源として実装されるＬＥＤの数が増加する傾向にある。実装されるＬＥＤの増加により、発生する熱量も増加する。従って、従来よりもさらに効率的に放熱させることが不可欠となっている。 By the way, with the increase in size of the liquid crystal panel, the number of LEDs mounted as light sources tends to increase. The amount of heat generated increases as the number of mounted LEDs increases. Therefore, it is indispensable to dissipate heat more efficiently than before.
　本発明は、上述のごとき事情に鑑みてなされたものであり、ＬＥＤに発生する熱を効果的に放散することが可能な表示装置等を提供することを目的とする。 The present invention has been made in view of the circumstances as described above, and an object thereof is to provide a display device and the like that can effectively dissipate heat generated in an LED.
　本発明に係る表示装置は、表側に画像を表示する表示パネルへ光を供給する発光素子が固定してある放熱体と、前記表示パネルの周縁部を保持してある保持枠体と、前記保持枠体を覆うカバーとを備える表示装置において、前記保持枠体は、前記表示パネルの裏面と略直角な方向に突出し、前記表示パネルの側面に沿う方向に長い載置部を有し、該載置部の長手方向に沿って、前記放熱体を載置してあり、前記放熱体は、前記カバー及び前記保持枠体と結合してあることを特徴とする。 The display device according to the present invention includes a heat radiator to which a light emitting element that supplies light to a display panel that displays an image on the front side is fixed, a holding frame that holds a peripheral portion of the display panel, and the holding In the display device including a cover that covers the frame body, the holding frame body protrudes in a direction substantially perpendicular to the back surface of the display panel and has a long mounting portion in a direction along the side surface of the display panel. The heat dissipating body is placed along the longitudinal direction of the mounting portion, and the heat dissipating body is combined with the cover and the holding frame body.
　本発明にあっては、放熱体がカバー及び保持枠体と結合してあるので、発光素子にて発生する熱は、放熱体、カバー、及び保持枠体より放散される。従って、発光素子にて発生する熱を効率的に放熱することが可能となる。 In the present invention, since the radiator is combined with the cover and the holding frame, the heat generated in the light emitting element is dissipated from the radiator, the cover, and the holding frame. Therefore, it is possible to efficiently dissipate heat generated in the light emitting element.
　本発明に係る表示装置は、前記放熱体及び前記保持枠体の間に、熱伝導体が介在していることを特徴とする。 The display device according to the present invention is characterized in that a heat conductor is interposed between the radiator and the holding frame.
　本発明にあっては、放熱体と保持枠体との間に熱伝導シートが介在しているので、放熱体より保持枠体へ伝導する熱量を増加することが可能となる。そのことにより、発光素子にて発生する熱を、より効率的に放散することが可能となる。 In the present invention, since the heat conductive sheet is interposed between the radiator and the holding frame, it is possible to increase the amount of heat conducted from the radiator to the holding frame. As a result, the heat generated in the light emitting element can be dissipated more efficiently.
　本発明に係る表示装置は、前記放熱体には基板が固定してあり、該基板の一面に前記発光素子が実装してあり、前記基板の他面には前記発光素子に関する属性情報が記載してあり、前記放熱体の前記基板が固定されている面には、前記属性情報の記載位置に対応する位置に開口部が設けてあることを特徴とする。 In the display device according to the present invention, a substrate is fixed to the radiator, the light emitting element is mounted on one surface of the substrate, and attribute information about the light emitting element is described on the other surface of the substrate. The surface of the heat radiating body on which the substrate is fixed is provided with an opening at a position corresponding to the position where the attribute information is described.
　本発明にあっては、発光素子を実装した基板には、前記発光素子に関する属性情報が記載され、その記載位置に対応した放熱体には開口部が設けてあるので、放熱体から光源モジュールを取り外すこと無く、該光源モジュールの属性情報を参照することが可能となる。 In the present invention, the attribute information about the light emitting element is described on the substrate on which the light emitting element is mounted, and an opening is provided in the radiator corresponding to the described position. It is possible to refer to the attribute information of the light source module without removing it.
　本発明に係るテレビジョン受像機は、上述の表示装置と、テレビジョン放送を受信するチューナ部とを備え、該チューナ部が受信したテレビジョン放送に係る画像を前記表示装置に表示するようにしてあることを特徴とする。 A television receiver according to the present invention includes the above-described display device and a tuner unit that receives a television broadcast, and displays an image related to the television broadcast received by the tuner unit on the display device. It is characterized by being.
　本発明にあっては、放熱体がカバー及び保持枠体と結合してあるので、発光素子にて発生する熱は、放熱体、カバー、及び保持枠体より放散される。従って発光素子にて発生する熱を効率的に放熱することが可能となる。 In the present invention, since the radiator is combined with the cover and the holding frame, the heat generated in the light emitting element is dissipated from the radiator, the cover, and the holding frame. Therefore, it is possible to efficiently dissipate heat generated in the light emitting element.
　本発明によれば、発光素子にて発生する熱は、放熱体、カバー、及び保持枠体より放散されるので、効率的に放熱することが可能となる。 According to the present invention, the heat generated in the light emitting element is dissipated from the heat radiating body, the cover, and the holding frame, so that the heat can be efficiently radiated.
本実施の形態における液晶テレビの外観を示す斜視図である。It is a perspective view which shows the external appearance of the liquid crystal television in this Embodiment. 液晶テレビの要部を示す縦断面図である。It is a longitudinal cross-sectional view which shows the principal part of a liquid crystal television. 裏側上から見た光源モジュールの部分斜視図である。It is the fragmentary perspective view of the light source module seen from the back side. 裏側下から見たヒートスプレッタの部分斜視図である。It is a fragmentary perspective view of the heat spreader seen from the back side lower part. 図４のＶ－Ｖ線における断面図である。FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. 裏側上から見た光源モジュール及びヒートスプレッタの部分斜視図である。It is the fragmentary perspective view of the light source module and heat spreader seen from the back side. 裏側上から見た光源モジュールが載置されたヒートスプレッタの部分斜視図である。It is a fragmentary perspective view of the heat spreader by which the light source module seen from the back side was mounted. 保持枠体を左裏側上方から見た斜視図である。It is the perspective view which looked at the holding frame from the upper left side. 保持枠体を構成する部材のうち下側部分の部材裏側を左側面から見た斜視図である。It is the perspective view which looked at the member back side of the lower part among members which constitute a maintenance frame from the left side. 図９のＸ－Ｘ線における断面図である。FIG. 10 is a cross-sectional view taken along line XX in FIG. 9. ヒートスプレッタが載置されている保持枠体の下側部分の部材裏側を左側面から見た部分斜視図である。It is the fragmentary perspective view which looked at the member back side of the lower part of the holding frame body in which the heat spreader is mounted from the left side. 本実施の形態における液晶テレビの分解斜視図である。It is a disassembled perspective view of the liquid crystal television in this Embodiment. 光源モジュールを下側から見た部分斜視図である。It is the fragmentary perspective view which looked at the light source module from the lower side. ヒートスプレッタを下側から見た部分斜視図である。It is the fragmentary perspective view which looked at the heat spreader from the lower side. 光源モジュールが載置されたヒートスプレッタを下側から見た部分斜視図である。It is the fragmentary perspective view which looked at the heat spreader by which the light source module was mounted from the lower side.
　以下、本発明をその実施の形態を示す図面に基づき具体的に説明する。ここでは、表示装置を備える液晶テレビジョン（以下、「液晶テレビ」と記す）を例とする。 Hereinafter, the present invention will be specifically described with reference to the drawings illustrating embodiments thereof. Here, a liquid crystal television including a display device (hereinafter referred to as “liquid crystal television”) is taken as an example.
　図１は本実施の形態における液晶テレビの外観を示す斜視図である。この液晶テレビは、液晶パネル１（表示パネル）、フロントキャビネット６、リアキャビネット１２、スタンド１５、チューナ部１６、画像処理部１７、電源制御部１８を含む。液晶パネル１は略直方体状をなし、表側に画像を表示する。フロントキャビネット６は矩形状の枠体であり、液晶パネル１の周縁を表側から覆っている。リアキャビネット１２は液晶パネル１の裏側を覆っている。スタンド１５は、液晶テレビ１をテーブル等の平面に立てて載置するためのものである。 FIG. 1 is a perspective view showing an appearance of a liquid crystal television in the present embodiment. The liquid crystal television includes a liquid crystal panel 1 (display panel), a front cabinet 6, a rear cabinet 12, a stand 15, a tuner unit 16, an image processing unit 17, and a power supply control unit 18. The liquid crystal panel 1 has a substantially rectangular parallelepiped shape and displays an image on the front side. The front cabinet 6 is a rectangular frame and covers the periphery of the liquid crystal panel 1 from the front side. The rear cabinet 12 covers the back side of the liquid crystal panel 1. The stand 15 is for placing the liquid crystal television 1 on a flat surface such as a table.
　チューナ部１６は、テレビジョン放送を受信し、放送信号を取り出す。画像処理部１７は、放送信号から画像情報を取り出す。取り出された画像情報を基に液晶パネル１に画像が表示される。電源制御部１８は、所定電圧の電力を液晶テレビの各部に供給する。 The tuner unit 16 receives a television broadcast and extracts a broadcast signal. The image processing unit 17 extracts image information from the broadcast signal. An image is displayed on the liquid crystal panel 1 based on the extracted image information. The power control unit 18 supplies power of a predetermined voltage to each unit of the liquid crystal television.
　以下の説明においては、液晶テレビの液晶パネル１が設けられた側を表側と呼ぶこととする。表側の反対側を裏側と呼ぶこととする。液晶パネル１に向かって左右をそれぞれ左側、右側と呼ぶこととする。また、液晶パネル１に向かって上下をそれぞれ上側、下側と呼ぶこととする。
　また、液晶テレビの各構成要素の説明においては、各構成要素が組み付けられた状態での方向を記述する。 In the following description, the side on which the liquid crystal panel 1 of the liquid crystal television is provided is referred to as the front side. The opposite side of the front side is called the back side. The left and right sides of the liquid crystal panel 1 are referred to as the left side and the right side, respectively. Further, the upper and lower sides of the liquid crystal panel 1 are referred to as an upper side and a lower side, respectively.
In the description of each component of the liquid crystal television, the direction in which each component is assembled is described.
　図２は液晶テレビの要部を示す縦断面図である。図２では液晶テレビの表側を下にして描いている。本実施の形態の液晶テレビは、液晶パネル１の裏側に、表側からレンズ系シート群７、裏側から光反射シート８で挟んだ導光板２を配している。導光板２の長手方向側面に対向して、ベース基板３１（基板）に発光素子３０が実装された光源モジュール３が配されている。光源モジュール３は、ヒートスプレッタ４（放熱体）の導光板２と平行な面４１に固定されている。さらに、ヒートスプレッタ４は、保持枠体５の導光板２と平行な面（載置部）に固定されている。液晶パネル１表側の保持枠体５と液晶パネル１等の裏側のバックライトシャーシ９（カバー）とにより、液晶パネル１、ヒートスプレッタ４等は挟まれ、ネジ６１によりフロントキャビネット６に固定されている。 FIG. 2 is a longitudinal sectional view showing a main part of the liquid crystal television. In FIG. 2, it is drawn with the front side of the liquid crystal television set facing down. In the liquid crystal television of the present embodiment, the light guide plate 2 sandwiched between the lens system sheet group 7 from the front side and the light reflecting sheet 8 from the back side is disposed on the back side of the liquid crystal panel 1. The light source module 3 in which the light emitting element 30 is mounted on the base substrate 31 (substrate) is disposed so as to face the side surface in the longitudinal direction of the light guide plate 2. The light source module 3 is fixed to a surface 41 parallel to the light guide plate 2 of the heat spreader 4 (heat radiator). Further, the heat spreader 4 is fixed to a surface (mounting portion) parallel to the light guide plate 2 of the holding frame 5. The liquid crystal panel 1, the heat spreader 4, and the like are sandwiched between the holding frame 5 on the front side of the liquid crystal panel 1 and the backlight chassis 9 (cover) on the back side of the liquid crystal panel 1, and are fixed to the front cabinet 6 with screws 61.
　導光板２はアクリル樹脂、ポリカーボネート樹脂、メタクリル樹脂、環状ポリオレフィン等の合成樹脂製であり、略直方形に形成されている。 The light guide plate 2 is made of a synthetic resin such as acrylic resin, polycarbonate resin, methacrylic resin, or cyclic polyolefin, and is formed in a substantially rectangular shape.
　バックライトシャーシ９は、金属板、例えば鋼板を略長方形状に形成してある。バックライトシャーシ９は、液晶テレビの裏側から、液晶パネル１、導光板２、光源モジュール３などを覆う。 The backlight chassis 9 is formed of a metal plate such as a steel plate in a substantially rectangular shape. The backlight chassis 9 covers the liquid crystal panel 1, the light guide plate 2, the light source module 3 and the like from the back side of the liquid crystal television.
　保持枠体５と液晶パネル１とが接触する部分には、弾性部材１３が設けられている。弾性部材１３は液晶パネル１を確実に固定すると共に、保持枠体５により液晶パネル１の表面が傷つくことを防止している。フロントキャビネット６は、保持枠体５を覆う。 An elastic member 13 is provided at a portion where the holding frame 5 and the liquid crystal panel 1 are in contact with each other. The elastic member 13 securely fixes the liquid crystal panel 1 and prevents the surface of the liquid crystal panel 1 from being damaged by the holding frame 5. The front cabinet 6 covers the holding frame 5.
　以上のように構成された液晶テレビにおいて、発光素子３０が発した光は、導光板２の側縁から入る。導光板２の裏側には光反射シート８があるため、導光板２の裏側方向に進んだ光は光反射シート８に反射される。光反射シート８で反射した光が、液晶パネル１を裏側から照射する。液晶パネル１が制御され、液晶パネル１の表側に画像が表示される。 In the liquid crystal television configured as described above, light emitted from the light emitting element 30 enters from the side edge of the light guide plate 2. Since there is the light reflecting sheet 8 on the back side of the light guide plate 2, the light traveling in the back side direction of the light guide plate 2 is reflected by the light reflecting sheet 8. The light reflected by the light reflecting sheet 8 irradiates the liquid crystal panel 1 from the back side. The liquid crystal panel 1 is controlled, and an image is displayed on the front side of the liquid crystal panel 1.
　図３は裏側上から見た光源モジュール３の部分斜視図である。図４は裏側下から見たヒートスプレッタ４の部分斜視図である。図５は図４のＶ－Ｖ線における断面図である。図６は裏側上から見た光源モジュール３及びヒートスプレッタ４の部分斜視図である。図７は裏側上から見た光源モジュール３が載置されたヒートスプレッタ４の部分斜視図である。図８は保持枠体５を左裏側上方から見た斜視図である。 FIG. 3 is a partial perspective view of the light source module 3 as viewed from the back side. FIG. 4 is a partial perspective view of the heat spreader 4 as seen from the lower rear side. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is a partial perspective view of the light source module 3 and the heat spreader 4 as seen from above. FIG. 7 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as seen from above. FIG. 8 is a perspective view of the holding frame 5 as viewed from the upper left side.
　光源モジュール３は、図３に示すように、複数の発光素子３０と、該発光素子３０を実装する短冊状のベース基板３１と、コネクタ３２を含む。発光素子３０はＬＥＤである。発光素子３０はベース基板３１の長手方向に沿って並置されている。発光素子３０は、駆動回路（図示しない）により駆動され、発光する。発光素子３０の駆動電流は、コネクタ３２にて接続されるケーブルにより供給される。コネクタ３２は、ベース基板３１の一端に固定されている。 As shown in FIG. 3, the light source module 3 includes a plurality of light emitting elements 30, a strip-like base substrate 31 on which the light emitting elements 30 are mounted, and a connector 32. The light emitting element 30 is an LED. The light emitting elements 30 are juxtaposed along the longitudinal direction of the base substrate 31. The light emitting element 30 is driven by a drive circuit (not shown) to emit light. A drive current for the light emitting element 30 is supplied by a cable connected by a connector 32. The connector 32 is fixed to one end of the base substrate 31.
　ヒートスプレッタ４は、図４に示すように棒状の部材であり、図５に示すように断面が略コの字状である。図２のように取り付けられた場合に上側となる上側部分４１には、図７に示すように光源モジュール３が載置される。図６に示すように、上側部分４１にはネジ穴４７が設けられている。光源モジュール３は、ネジ穴３３及びネジ穴４７にネジ３３０を通すことにより、ヒートスプレッタ４に固定される。なお、図７においては、ネジを省略している。 The heat spreader 4 is a rod-shaped member as shown in FIG. 4 and has a substantially U-shaped cross section as shown in FIG. As shown in FIG. 7, the light source module 3 is placed on the upper portion 41 which is the upper side when attached as shown in FIG. As shown in FIG. 6, the upper portion 41 is provided with a screw hole 47. The light source module 3 is fixed to the heat spreader 4 by passing the screw 330 through the screw hole 33 and the screw hole 47. In FIG. 7, screws are omitted.
　図４に示すように、ヒートスプレッタ４の表側部分４２は下側部分４３と連なっている。下側部分４３は不連続であり、数箇所切断されている。切断されている下側部分４３の間には、表側部分４２と連続して下方向に伸びている板状の結合部４４が形成してある。結合部４４はヒートスプレッタ４の両端部にも形成されている。結合部４４に設けられたネジ穴４５を通るネジ６１により、ヒートスプレッタ４は保持枠体５に固定される。 As shown in FIG. 4, the front portion 42 of the heat spreader 4 is continuous with the lower portion 43. The lower portion 43 is discontinuous and is cut at several places. Between the cut | disconnected lower part 43, the plate-shaped coupling part 44 extended in the downward direction following the front side part 42 is formed. The coupling portion 44 is also formed at both end portions of the heat spreader 4. The heat spreader 4 is fixed to the holding frame 5 by screws 61 passing through the screw holes 45 provided in the coupling portion 44.
　ヒートスプレッタ４は、熱伝導率の高い金属、例えばアルミニウムにより形成され、発光素子３０に発生した熱を伝導し放散させる。ヒートスプレッタ４の上側部分４１の一面は、光源モジュール３と接し、他面は保持枠体５と接している。 The heat spreader 4 is made of a metal having high thermal conductivity, such as aluminum, and conducts and dissipates heat generated in the light emitting element 30. One surface of the upper portion 41 of the heat spreader 4 is in contact with the light source module 3, and the other surface is in contact with the holding frame 5.
　図８に示すように、保持枠体５は、それぞれ金属板、例えば、鋼板により形成されている。保持枠体５は下側の部材５１、左側の部材５２、上側の部材５３、右側の部材５４をネジにより結合した、矩形枠状である。保持枠体５は、液晶パネル１、導光板２などを保持する。 As shown in FIG. 8, each holding frame 5 is formed of a metal plate, for example, a steel plate. The holding frame 5 has a rectangular frame shape in which a lower member 51, a left member 52, an upper member 53, and a right member 54 are coupled by screws. The holding frame 5 holds the liquid crystal panel 1, the light guide plate 2, and the like.
　図９は保持枠体５を構成する部材のうち下側部分の部材５１裏側を左側面から見た斜視図である。図９の下側が、液晶テレビの表側である。図１０は図９のＸ－Ｘ線における断面図である。図１１は、ヒートスプレッタ４が載置されている保持枠体５の下側部分の部材５１裏側を左側面から見た部分斜視図である。 FIG. 9 is a perspective view of the lower part of the member 51 constituting the holding frame 5 as viewed from the left side. The lower side of FIG. 9 is the front side of the liquid crystal television. 10 is a cross-sectional view taken along line XX of FIG. FIG. 11 is a partial perspective view of the rear side of the member 51 in the lower portion of the holding frame 5 on which the heat spreader 4 is placed as viewed from the left side.
　部材５１は、載置部としての液晶パネル１と平行な下側から上側に伸びる板状部分５１ａ、それに連なり表側に伸びている板状部分５１ｂを備えている。さらに部材５１は、それに連なり上側に伸びている板状部分５１ｃ、それに連なり裏側、すなわち導光板２の液晶パネル１と接する面に向かって突出している部分５１ｄ、それに連なり上側に伸びている板状部分５１ｅを備えている。部材５１は、左右方向の両端に、板状部分５１ｅから更に上側に伸びている短冊状の連結部５１ｇ及び、裏側に突出している連結部５１ｆを備えている。 The member 51 includes a plate-like portion 51a extending upward from the lower side parallel to the liquid crystal panel 1 serving as a mounting portion, and a plate-like portion 51b extending to the front side. Further, the member 51 includes a plate-like portion 51c extending upward and continuous to the upper side, a portion 51d projecting toward the back side, that is, the surface of the light guide plate 2 that contacts the liquid crystal panel 1, and a plate-like portion extending upward and continuous thereto. A portion 51e is provided. The member 51 includes a strip-shaped connecting portion 51g extending further upward from the plate-like portion 51e and a connecting portion 51f protruding to the back side at both ends in the left-right direction.
　図１１に示すように、部材５１の板状部分５１ａ、５１ｂがヒートスプレッタ４と接触する部分である。部材５１に設けられているネジ穴５１ｈは、部材５１にバックライトシャーシ９、ヒートスプレッタ４を固定するためのネジが通る穴である。 As shown in FIG. 11, the plate- like portions 51 a and 51 b of the member 51 are portions that come into contact with the heat spreader 4. The screw holes 51 h provided in the member 51 are holes through which screws for fixing the backlight chassis 9 and the heat spreader 4 to the member 51 pass.
　部材５１の連結部５１ｇは、部材５１と保持枠体５を構成する他の部材５２又は５４とをネジにより連結させるためのものである。 The connection part 51g of the member 51 is for connecting the member 51 and the other member 52 or 54 which comprises the holding frame 5 with a screw | thread.
　次に、本実施の形態に係る液晶テレビの組み立て方法について、説明する。以下の説明において液晶テレビは表側を下にして組み立てている。
　まず、フロントキャビネット６に、保持枠体５を載せる。保持枠体５の内縁部分に、液晶パネル１の外縁部分が接触するように液晶パネル１を載せる。さらに液晶パネル１の上に、レンズ系シート群７、導光板２、光反射シート８を載せる。また、光源モジュール３を固定したヒートスプレッタ４を、保持枠体５の部材５１の導光板２の側縁と平行な面に載せる。さらに、バックライトシャーシ９を載せて、フロントキャビネット６にネジ６１で固定する。保持枠体５に載せられたヒートスプレッタ４は、保持枠体５及びバックライトシャーシ９に挟まれる形でネジ止めされる。
　チューナ部１６、画像処理部１７、電源制御部１８をバックライトシャーシ９に固定し、リアキャビネット１２を被せ、フロントキャビネット６とネジで固定する。 Next, a method for assembling the liquid crystal television according to the present embodiment will be described. In the following description, the liquid crystal television is assembled with the front side down.
First, the holding frame 5 is placed on the front cabinet 6. The liquid crystal panel 1 is placed so that the outer edge portion of the liquid crystal panel 1 contacts the inner edge portion of the holding frame 5. Further, the lens system sheet group 7, the light guide plate 2, and the light reflection sheet 8 are placed on the liquid crystal panel 1. Further, the heat spreader 4 to which the light source module 3 is fixed is placed on a surface parallel to the side edge of the light guide plate 2 of the member 51 of the holding frame 5. Further, the backlight chassis 9 is mounted and fixed to the front cabinet 6 with screws 61. The heat spreader 4 placed on the holding frame 5 is screwed in a form sandwiched between the holding frame 5 and the backlight chassis 9.
The tuner unit 16, the image processing unit 17, and the power supply control unit 18 are fixed to the backlight chassis 9, the rear cabinet 12 is covered, and the front cabinet 6 is fixed with screws.
　図１２は本実施の形態における液晶テレビの分解斜視図である。フロントキャビネット６、保持枠体５、ヒートスプレッタ４、及びバックライトシャーシ９がネジ６１で固定される様子を示している。フロントキャビネット６には保持枠体５が載せられている。光源モジュール３が固定されたヒートスプレッタ４は、保持枠体５に載置される。バックライトシャーシ９は、ヒートスプレッタ４及び保持枠体５を挟んで、フロントキャビネット６と固定される。
　なお、チューナ部１６、画像処理部１７、電源制御部１８、及びリアキャビネット１２は省略している。 FIG. 12 is an exploded perspective view of the liquid crystal television in the present embodiment. A state in which the front cabinet 6, the holding frame 5, the heat spreader 4, and the backlight chassis 9 are fixed with screws 61 is shown. A holding frame 5 is placed on the front cabinet 6. The heat spreader 4 to which the light source module 3 is fixed is placed on the holding frame 5. The backlight chassis 9 is fixed to the front cabinet 6 with the heat spreader 4 and the holding frame 5 interposed therebetween.
The tuner unit 16, the image processing unit 17, the power supply control unit 18, and the rear cabinet 12 are omitted.
　以上のように構成された液晶テレビでは、発光素子３０が搭載された光源モジュール３は、熱伝導率の高いアルミニウムにて形成されたヒートスプレッタ４に固定されている。ヒートスプレッタ４は、保持枠体５及びバックライトシャーシ９と密着するようにネジ止めされている。これにより、発光素子３０にて発生した熱は、ヒートスプレッタ４に伝導する。ヒートスプレッタ４に伝導した熱はさらに保持枠体５及びバックライトシャーシ９に伝導されることにより、効率的に放散される。それにより、発光素子３０が発した熱による、発光素子３０自身やその他の部品の損傷を防ぐという効果を奏する。 In the liquid crystal television configured as described above, the light source module 3 on which the light emitting element 30 is mounted is fixed to a heat spreader 4 formed of aluminum having high thermal conductivity. The heat spreader 4 is screwed so as to be in close contact with the holding frame 5 and the backlight chassis 9. Thereby, the heat generated in the light emitting element 30 is conducted to the heat spreader 4. The heat conducted to the heat spreader 4 is further dissipated efficiently by being conducted to the holding frame 5 and the backlight chassis 9. Thereby, there is an effect of preventing damage to the light emitting element 30 itself and other components due to heat generated by the light emitting element 30.
　なお、ヒートスプレッタ４と保持枠体５とはネジ止めされるものとしたが、それに限らず、接着剤、両面テープで固定しても良い。
　また、ヒートスプレッタ４から保持枠体５へ伝導する熱量を増やすために、シリコン、アクリル樹脂、カーボンファイバなどから形成された熱伝導性シート（熱伝導体）をヒートスプレッタ４と保持枠体５との間に介在させる構造としても良い。さらにまた、ヒートスプレッタ４とバックライトシャーシ９との間に熱伝導性シートを介在させても良い。 Note that the heat spreader 4 and the holding frame 5 are screwed, but not limited thereto, and may be fixed with an adhesive or a double-sided tape.
Further, in order to increase the amount of heat conducted from the heat spreader 4 to the holding frame 5, a heat conductive sheet (heat conductor) formed of silicon, acrylic resin, carbon fiber or the like is interposed between the heat spreader 4 and the holding frame 5. It is good also as a structure interposed in. Furthermore, a heat conductive sheet may be interposed between the heat spreader 4 and the backlight chassis 9.
（変形例）
　次に光源モジュール３の変形例について、説明する。光源モジュール３には白色を発光するＬＥＤを用いる。白色ＬＥＤは、ＬＥＤ毎に色度又は明るさなどの発光特性にばらつきがある。そこで、製造されたＬＥＤを特性値毎に、複数グループに分けて管理を行なっている。各グループのことをランクという。白色ＬＥＤを実装する場合、ランクの異なるＬＥＤを組み合わせて実装すると表示品位が悪化するため、ランクを合わせて実装する必要がある。 (Modification)
Next, a modified example of the light source module 3 will be described. The light source module 3 uses an LED that emits white light. White LEDs vary in light emission characteristics such as chromaticity or brightness for each LED. Therefore, the manufactured LEDs are managed in a plurality of groups for each characteristic value. Each group is called a rank. When the white LED is mounted, the display quality deteriorates when the LEDs having different ranks are mounted in combination, and therefore, it is necessary to mount them in accordance with the rank.
　図１３Ａは光源モジュールを下側から見た部分斜視図である。図１３Ｂはヒートスプレッタを下側から見た部分斜視図である。図１４は光源モジュール３が載置されたヒートスプレッタ４を下側から見た部分斜視図である。 FIG. 13A is a partial perspective view of the light source module as viewed from below. FIG. 13B is a partial perspective view of the heat spreader as viewed from below. FIG. 14 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as viewed from below.
　光源モジュール３の下側の面には、該光源モジュール３のランク識別情報３４（属性情報）が記載されている。ランク識別情報３４は、例えば、バーコード、２次元バーコード、又は英数字から構成された文字列である。ランク識別情報３４には少なくとも光源モジュール３に搭載されているＬＥＤのランク情報が含まれている。 On the lower surface of the light source module 3, rank identification information 34 (attribute information) of the light source module 3 is described. The rank identification information 34 is, for example, a character string composed of a barcode, a two-dimensional barcode, or alphanumeric characters. The rank identification information 34 includes at least rank information of LEDs mounted on the light source module 3.
　ヒートスプレッタ４には、ランク識別情報３４を参照するための窓（開口部）４６が設けられている。それにより、光源モジュール３をヒートスプレッタ４から取り外すこと無く、該光源モジュール３のランク識別情報３４を参照することが可能となる。光源モジュール３のベース基板３１は剛性が低いので、ヒートスプレッタ４より取り外す際に、損傷する場合がある。したがって、ヒートスプレッタ４より取り外すこと無くランク識別情報３４を参照可能とすることは、修理・点検で光源モジュール３のランク識別情報３４を確認する際に、光源モジュール３の不要な損傷を防ぐという効果を奏する。 The heat spreader 4 is provided with a window (opening) 46 for referring to the rank identification information 34. Accordingly, it is possible to refer to the rank identification information 34 of the light source module 3 without removing the light source module 3 from the heat spreader 4. Since the base substrate 31 of the light source module 3 has low rigidity, it may be damaged when it is removed from the heat spreader 4. Therefore, making it possible to refer to the rank identification information 34 without removing it from the heat spreader 4 has the effect of preventing unnecessary damage to the light source module 3 when checking the rank identification information 34 of the light source module 3 during repair and inspection. Play.
　上述の説明において、ヒートスプレッタ４はアルミニウム製としたが、それに限られず、熱伝導性の良い材質であれば良い。例えば、鉄又はステンレスである。より効率良く熱を放散する観点からは、銀や銅なども好ましいが、コスト、強度及び加工の容易さを考慮すると、アルミニウム、鉄、又はステンレスを用いることが好ましい。
　保持枠体５及びバックライトシャーシ９は鋼板より構成されるものとしたが、発光素子３０の熱をより良く放散させるために、アルミニウム、鉄、又はステンレスを用いても良い。 In the above description, the heat spreader 4 is made of aluminum. However, the heat spreader 4 is not limited thereto, and any material having good heat conductivity may be used. For example, iron or stainless steel. From the viewpoint of dissipating heat more efficiently, silver, copper, and the like are preferable, but aluminum, iron, or stainless steel is preferably used in consideration of cost, strength, and ease of processing.
Although the holding frame 5 and the backlight chassis 9 are made of steel plates, aluminum, iron, or stainless steel may be used in order to dissipate heat of the light emitting element 30 better.
　なお、上述した実施の形態はすべての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は、上述した意味ではなく、請求の範囲によって示され、請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。 It should be noted that the above-described embodiment is an example in all respects and is not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
　１　液晶パネル
　２　導光板
　３　光源モジュール
　３０　発光素子
　３１　ベース基板
　３４　ランク識別情報
　４　ヒートスプレッタ
　４６　窓
　５　保持枠体
　５１ａ、５１ｂ　板状部分（載置部）
　６　フロントキャビネット
　９　バックライトシャーシ
　１２　リアキャビネット





                                                                                 DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 2 Light guide plate 3 Light source module 30 Light emitting element 31 Base substrate 34 Rank identification information 4 Heat spreader 46 Window 5 Holding frame 51a, 51b Plate-shaped part (mounting part)
6 Front cabinet 9 Backlight chassis 12 Rear cabinet





Claims (4)

  1. 　表側に画像を表示する表示パネルへ光を供給する発光素子が固定してある放熱体と、
    　前記表示パネルの周縁部を保持してある保持枠体と、
    　前記保持枠体を覆うカバーと
    　を備える表示装置において、
    　前記保持枠体は、前記表示パネルの裏面と略直角な方向に突出し、前記表示パネルの側面に沿う方向に長い載置部を有し、該載置部の長手方向に沿って、前記放熱体を載置してあり、
    　前記放熱体は、前記カバー及び前記保持枠体と結合してあること
    　を特徴とする表示装置。     A radiator with a light emitting element for supplying light to a display panel displaying an image on the front side fixed;
    A holding frame holding the peripheral edge of the display panel;
    A display device comprising: a cover that covers the holding frame;
    The holding frame protrudes in a direction substantially perpendicular to the back surface of the display panel, and has a mounting portion that is long in a direction along a side surface of the display panel. Is placed,
    The heat radiating body is coupled to the cover and the holding frame.
  2. 　前記放熱体及び前記保持枠体の間に、熱伝導体が介在していること
    　を特徴とする請求項１に記載の表示装置。     The display device according to claim 1, wherein a heat conductor is interposed between the heat radiating body and the holding frame.
  3. 　前記放熱体には基板が固定してあり、
    　該基板の一面に前記発光素子が実装してあり、
    　前記基板の他面には前記発光素子に関する属性情報が記載してあり、
    　前記放熱体の前記基板が固定されている面には、前記属性情報の記載位置に対応する位置に開口部が設けてあること
    　を特徴とする請求項１又は２に記載の表示装置。     A substrate is fixed to the radiator,
    The light emitting element is mounted on one surface of the substrate,
    Attribute information about the light emitting element is described on the other surface of the substrate,
    The display device according to claim 1, wherein an opening is provided at a position corresponding to a position where the attribute information is described on a surface of the heat radiating body on which the substrate is fixed.
  4. 　請求項１から３に記載の表示装置と、
    　テレビジョン放送を受信するチューナ部と
    　を備え、
    　該チューナ部が受信したテレビジョン放送に係る画像を前記表示装置に表示するようにしてあること
    　を特徴とするテレビジョン受像機。     A display device according to claim 1;
    And a tuner for receiving television broadcasts,
    An image of a television broadcast received by the tuner unit is displayed on the display device.
PCT/JP2012/070657 2011-12-13 2012-08-14 Display device and television receiver WO2013088783A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011272668A JP5335058B2 (en) 2011-12-13 2011-12-13 Display device and television receiver
JP2011-272668 2011-12-13

Publications (1)

Publication Number Publication Date
WO2013088783A1 true WO2013088783A1 (en) 2013-06-20

Family

ID=48612243

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/070657 WO2013088783A1 (en) 2011-12-13 2012-08-14 Display device and television receiver

Country Status (2)

Country Link
JP (1) JP5335058B2 (en)
WO (1) WO2013088783A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6256307B2 (en) * 2014-11-06 2018-01-10 京セラドキュメントソリューションズ株式会社 Lighting device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010074985A (en) * 2008-09-19 2010-04-02 Fujikura Ltd Electric connection box
JP2010072262A (en) * 2008-09-18 2010-04-02 Hitachi Ltd Liquid crystal display
JP2011096629A (en) * 2009-10-27 2011-05-12 Samsung Electronics Co Ltd Backlight unit and display device equipped with the same
WO2011067994A1 (en) * 2009-12-03 2011-06-09 シャープ株式会社 Illumination device, display device, and television reception device
JP2012137670A (en) * 2010-12-27 2012-07-19 Toshiba Corp Television receiver

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090115711A1 (en) * 2005-09-14 2009-05-07 Sharp Kabushiki Kaisha Liquid crystal display device
JP2009245885A (en) * 2008-03-31 2009-10-22 Sanken Electric Co Ltd Surface light source device
JP2010097924A (en) * 2008-09-18 2010-04-30 Hitachi Ltd Liquid crystal display unit
JP5271649B2 (en) * 2008-09-25 2013-08-21 株式会社日立製作所 Liquid crystal display

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010072262A (en) * 2008-09-18 2010-04-02 Hitachi Ltd Liquid crystal display
JP2010074985A (en) * 2008-09-19 2010-04-02 Fujikura Ltd Electric connection box
JP2011096629A (en) * 2009-10-27 2011-05-12 Samsung Electronics Co Ltd Backlight unit and display device equipped with the same
WO2011067994A1 (en) * 2009-12-03 2011-06-09 シャープ株式会社 Illumination device, display device, and television reception device
JP2012137670A (en) * 2010-12-27 2012-07-19 Toshiba Corp Television receiver

Also Published As

Publication number Publication date
JP2013125615A (en) 2013-06-24
JP5335058B2 (en) 2013-11-06

Similar Documents

Publication Publication Date Title
US7527409B2 (en) Display unit
US7578610B2 (en) Light source device and liquid display device
JP5506483B2 (en) Liquid crystal display device and lighting device
WO2012001998A1 (en) Lighting apparatus and image display apparatus provided therewith
US20110110046A1 (en) Reinforcement frame, component unit, and display
WO2012014601A1 (en) Illumination apparatus, display apparatus, and television receiver apparatus
WO2014021209A1 (en) Illumination device, display device, and tv reception device
JP4777469B1 (en) Illumination device and image display device including the same
JP5244998B1 (en) Display device and television receiver
TW201604625A (en) Backlight device
KR101513360B1 (en) Liquid crystal display device
WO2012099001A1 (en) Lighting apparatus and display apparatus
WO2011089789A1 (en) Lighting device, display device, and television receiver
JP2014071343A (en) Liquid crystal display device
KR20130088534A (en) Display device
JP2012014948A (en) Lighting system and image display device equipped with it
JP5335058B2 (en) Display device and television receiver
JP4862251B2 (en) Heat dissipation device and display device
JP5427228B2 (en) Display device and television receiver
KR101227597B1 (en) Backlight unit and liquid crystal display having the same and television apparatus
WO2013191047A1 (en) Display, and television receiver
JP5372278B2 (en) Display device, television receiver, and heat dissipation board module
JP2012084455A (en) Liquid crystal display device
EP2187248A1 (en) Backlight unit and liquid crystal display and TV device having the same
JP2012014947A (en) Lighting system and image display device equipped with it

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12857269

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12857269

Country of ref document: EP

Kind code of ref document: A1