WO2012042798A1 - Display device - Google Patents

Display device Download PDF

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Publication number
WO2012042798A1
WO2012042798A1 PCT/JP2011/005333 JP2011005333W WO2012042798A1 WO 2012042798 A1 WO2012042798 A1 WO 2012042798A1 JP 2011005333 W JP2011005333 W JP 2011005333W WO 2012042798 A1 WO2012042798 A1 WO 2012042798A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
crystal display
display panel
backlight
back cabinet
Prior art date
Application number
PCT/JP2011/005333
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French (fr)
Japanese (ja)
Inventor
清隆 中瀬
Original Assignee
パナソニック株式会社
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2012042798A1 publication Critical patent/WO2012042798A1/en

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    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46—Fixing elements

Definitions

  • the present invention relates to a flat display device such as a liquid crystal display device used in a television receiver or a monitor device.
  • a liquid crystal display device has a display module configured by arranging a backlight device as a surface light source on the back side of a flat liquid crystal display panel inside a thin casing composed of a front cabinet and a back cabinet. It is comprised by accommodating (refer patent document 1).
  • liquid crystal display device is completed as follows by a panel manufacturer and a finished product manufacturer.
  • Panel manufacturers manufacture LCD panels and deliver them to finished product manufacturers such as TV manufacturers.
  • the finished product manufacturer produces a display module by combining a backlight device as a surface light source and a liquid crystal display panel.
  • the display module is housed in a thin casing composed of a front cabinet and a back cabinet together with a driving circuit board of the liquid crystal display panel.
  • the finished product manufacturer a factory for assembling products is built in the area where the liquid crystal display device is sold, or in an area close to that area, and the finished product with the design and functions corresponding to the selling area is assembled. I try to sell it.
  • the present invention relates to a housing having a back cabinet, a flat display panel installed in the housing, a backlight device disposed on the back side of the flat display panel, and an image on the flat display panel.
  • a circuit board that constitutes a drive circuit for displaying the backlight circuit the back cabinet has a space that can accommodate the backlight device and the circuit board, and the back cabinet has an inner wall that forms the space,
  • FIG. 1 is a front view showing a liquid crystal display device as a display device according to an embodiment of the present invention.
  • FIG. 2 is a perspective view of the liquid crystal display device with the stand removed.
  • FIG. 3 is a block diagram showing circuit blocks of the entire configuration of the liquid crystal display device.
  • FIG. 4 is a plan view of the liquid crystal display device with the back cabinet removed.
  • FIG. 5 is a cross-sectional view of the liquid crystal display device of FIG. 2 taken along line 5-5. 6 is an enlarged view of a portion B of the liquid crystal display device in FIG.
  • FIG. 7 is an exploded perspective view of the liquid crystal display device.
  • FIG. 8 is a perspective view of the back cabinet on the inner wall surface side of the liquid crystal display device.
  • FIG. 9 is an exploded perspective view of a display module of the liquid crystal display device.
  • FIG. 10A is an enlarged cross-sectional view of a main part after the liquid crystal display device is assembled.
  • FIG. 10B is an enlarged cross-sectional view of a main part before the liquid crystal display device is assembled.
  • FIG. 1 is a front view showing a liquid crystal display device as a display device according to an embodiment of the present invention
  • FIG. 2 is a perspective view of the liquid crystal display device with a stand removed
  • FIG. 3 is an entire liquid crystal display device.
  • FIG. 4 is a plan view of the liquid crystal display device with the back cabinet removed
  • FIG. 5 is a cross-sectional view of the liquid crystal display device taken along line 5-5 in FIG. 2
  • FIG. FIG. 7 is an exploded perspective view of the liquid crystal display device.
  • the liquid crystal display device has a display device body 1 and a stand 2 for holding the display device body 1 in a standing state.
  • the display device body 1 is configured by housing a display module having a liquid crystal display panel 3 which is a flat display panel and a backlight device 4 (shown in FIG. 5) in a housing 5 made of a resin molded product or the like. ing.
  • the housing 5 includes a front cabinet 6 provided with an opening 6 a so as to correspond to the image display area of the liquid crystal display panel 3, and a back cabinet 7 combined with the front cabinet 6.
  • Reference numeral 6b denotes a speaker grill for releasing the sound of the speaker to the outside.
  • the schematic configuration of the entire liquid crystal display device is a signal including a drive circuit that displays an image on the liquid crystal display panel 3 and a lighting control circuit that controls lighting of the backlight device 4.
  • the signal processing circuit block 8 and the power supply block 9 are each configured by mounting components constituting a circuit on a circuit board.
  • the circuit board on which the signal processing circuit block 8, the power supply block 9, the tuner 10, and the like are mounted is attached so as to be disposed in a space between the back surface of the backlight device 4 and the back cabinet 7.
  • the signal processing circuit block 8 includes an external signal input terminal 12 for inputting a video signal from an external device such as a DVD player to the liquid crystal display device.
  • the back cabinet 7 includes a display module having the liquid crystal display panel 3 and the backlight device 4, and a space 7a capable of accommodating a circuit board. Further, backlight support portions 7b and 7c for supporting the backlight device 4 are provided on the inner bottom surface forming the space portion 7a. Of the backlight support portions 7b and 7c, the frame 4a of the backlight device 4 is attached to the backlight support portion 7b with screws 13.
  • the liquid crystal display panel 3 disposed in the opening of the space portion 7 a of the back cabinet 7 extends along the outer periphery of the backlight device 4 on the circuit board constituting the drive circuit disposed on the back side of the backlight device 4. It is electrically connected via a flexible wiring board (not shown) arranged as described above.
  • the back cabinet 7 has its outer peripheral tip 7 e fitted into a fitting piece 6 c provided on the inner peripheral wall surface of the front cabinet 6. Then, by attaching the front cabinet 6 to the back cabinet 7 with screws from the front cabinet 6 side, the circuit board on which the display module and the drive circuit are mounted is accommodated in the housing.
  • FIG. 8 is a perspective view of the back cabinet on the inner wall surface side of the liquid crystal display device, and the front cabinet 6 is attached to a boss portion 7 f provided on the outer peripheral portion of the back cabinet 7 with screws.
  • FIG. 9 is an exploded perspective view of the display module of the liquid crystal display device.
  • the backlight device 4 illuminates the liquid crystal display panel 3 from the back side.
  • the backlight device 4 includes a plurality of linear light sources 16 arranged in a frame 4a so as to be parallel to the liquid crystal display panel 3, and a diffusion plate 17 arranged so as to cover the frame 4a. ing.
  • an optical sheet 18 such as a prism sheet that diffuses or collects light transmitted through the diffusion plate 17 is laminated.
  • a reflection sheet 19 made of a metal foil or the like that reflects light emitted from the linear light source 16 toward the diffuser plate 17 is disposed so as to cover substantially the entire surface.
  • a pair of support members 20 for holding the linear light source 16 are disposed apart from each other in the extending direction of the linear light source 16.
  • a straight tubular cold cathode fluorescent lamp (CCFL) is used as the linear light source 16, and these are arranged in parallel to each other. Both ends of the linear light source 16 are covered with the support member 20.
  • the frame 4a is made of metal such as iron or resin.
  • the frame 4a has a box shape that opens in one direction, and includes a bottom wall that forms a bottom surface parallel to the arrangement surface of the linear light sources 16, and a side wall that rises from the peripheral edge of the bottom wall. Further, a plurality of diffusion plate support members 21 that support the diffusion plate 17 are arranged on the inner bottom surface of the frame 4a.
  • the diffusion plate 17 is disposed between the linear light source 16 and the liquid crystal display panel 3.
  • the diffuser plate 17 diffuses light incident from the incident surface on the linear light source 16 side and emits it from the exit surface on the liquid crystal display panel 3 side, and is formed by injection molding a transparent resin such as polystyrene or polycarbonate. Is formed.
  • a diffusion plate 17 is disposed on the opposite side of the reflection sheet 19 with the linear light source 16 interposed therebetween.
  • the diffusion plate 17 has an incident surface on which the direct light from the linear light source 16 and the reflected light from the reflection sheet 19 are incident, and an output surface from which the diffused light is emitted.
  • optical sheet 18 described above is laminated on the exit surface.
  • FIG. 10A is an enlarged cross-sectional view of the main part after the liquid crystal display device is assembled
  • FIG. 10B is an enlarged cross-sectional view of the main part before the liquid crystal display device is assembled.
  • the liquid crystal display device integrally holds the liquid crystal display panel 3 in the back cabinet 7 with screws 22 as holding members that can be attached from the outside of the back cabinet 7. That is, the outer peripheral edge of the liquid crystal display panel 3 is sandwiched between the frame 15 attached to the front cabinet 6 with screws 23 and the backlight device 4 attached to the back cabinet 7 with screws 24. In this state, the front cabinet 6 is fixed to the back cabinet 7 with screws 22 from the outside of the back cabinet 7.
  • the front cabinet 6 and the liquid crystal display panel 3 can be easily detached as shown in FIG. 10B by removing the screws 22 from the assembled state of FIG. 10A. Therefore, it becomes easy to perform work when the liquid crystal display panel or the backlight device is replaced when the device breaks down.
  • the backlight device 4 is attached to the back cabinet 7 with another screw 24.
  • the screw 22 is shared for the attachment of the backlight device 4 and the attachment of the liquid crystal display panel 3. It is also possible to employ a configuration in which both the liquid crystal display panel 3 and the backlight device 4 are integrally held in the back cabinet 7 using only the screws 22.
  • the backlight cabinet 7 has a space portion 7a that can accommodate the backlight device 4 and the circuit board, and a backlight device on an inner wall surface that forms the space portion 7a. 4 is provided, and a panel support 7d for supporting the liquid crystal display panel 3 is provided at the periphery of the opening 7a of the space 7a of the back cabinet 7, and is attached from the outside of the back cabinet 7. Screws 22 that are possible holding members allow the backlight device 4 and the liquid crystal display panel 3 to be attached to the back cabinet 7. Chino is obtained by integrally holding at least liquid crystal display panel 3.
  • the assembled product can be assembled by sequentially incorporating the backlight device 4 and the liquid crystal display panel 3 into the back cabinet 7 with reference to the back cabinet 7. Therefore, assembling a display module composed of the backlight device 4 and the liquid crystal display panel 3 and attaching a circuit board on which the drive circuit of the liquid crystal display panel 3 and the backlight device is mounted and then housed in the housing, Easy to assemble.
  • the back cabinet 7 and at least the liquid crystal display panel 3 of the liquid crystal display panel 3 are integrally held in the back cabinet 7 by screws 22 that can be attached from the outside of the back cabinet 7, the apparatus In the event of a failure, the effect of facilitating the work for replacing the liquid crystal display panel and the backlight device can be obtained.
  • the present invention can be applied to various display devices such as a liquid crystal display.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

A back cabinet (7) has a space section, in which a backlight device (4) and a circuit board can be stored, a backlight supporting section that supports the backlight device (4) is provided on the inner wall surface that forms the space section, a panel supporting section that supports a liquid crystal display panel (3) is provided on the peripheral portion of the opening of the space section in the back cabinet (7), and at least the liquid crystal display panel (3), out of the backlight device (4) and the liquid crystal display panel (3), is integrally held to the back cabinet (7) using a screw (22), i.e., a holding member that can be attached from the outside of the back cabinet (7).

Description

ディスプレイ装置Display device
　本発明は、テレビジョン受像機やモニター装置に使用される液晶表示装置等の平面型のディスプレイ装置に関するものである。 The present invention relates to a flat display device such as a liquid crystal display device used in a television receiver or a monitor device.
　液晶表示装置は、平面型のディスプレイ装置として、一般家庭は勿論のこと、業務用として、需要が拡大している。 Demand for liquid crystal display devices is expanding as a flat display device for business use as well as general households.
　一般的に液晶表示装置は、面光源としてのバックライト装置を平面型の液晶表示パネルの背面側に配置して構成された表示モジュールを、フロントキャビネットとバックキャビネットからなる薄型の筐体の内部に収容することにより構成されている（特許文献１参照）。 In general, a liquid crystal display device has a display module configured by arranging a backlight device as a surface light source on the back side of a flat liquid crystal display panel inside a thin casing composed of a front cabinet and a back cabinet. It is comprised by accommodating (refer patent document 1).
　ところで、このような液晶表示装置は、パネルメーカーと完成品メーカーによって、次のようにして完成される。 By the way, such a liquid crystal display device is completed as follows by a panel manufacturer and a finished product manufacturer.
　パネルメーカーは、液晶表示パネルを製造して、テレビメーカーなどの完成品メーカーに納入する。 Panel manufacturers manufacture LCD panels and deliver them to finished product manufacturers such as TV manufacturers.
　完成品メーカーは、面光源としてのバックライト装置と液晶表示パネルとを組み合わせて表示モジュールを作製する。また、その表示モジュールを液晶表示パネルの駆動回路基板とともに、フロントキャビネットとバックキャビネットからなる薄型の筐体の内部に収容する。 The finished product manufacturer produces a display module by combining a backlight device as a surface light source and a liquid crystal display panel. In addition, the display module is housed in a thin casing composed of a front cabinet and a back cabinet together with a driving circuit board of the liquid crystal display panel.
　このようにして、液晶表示装置が完成される。 In this way, the liquid crystal display device is completed.
　なお、完成品メーカーでは、液晶表示装置を販売する地域、またはその地域に近い地域に、製品を組み立てる工場を建設し、販売する地域に対応するデザイン、機能を備えた完成品の組立てを行い、販売するようにしている。 In the finished product manufacturer, a factory for assembling products is built in the area where the liquid crystal display device is sold, or in an area close to that area, and the finished product with the design and functions corresponding to the selling area is assembled. I try to sell it.
　全世界に液晶表示装置の需要が拡大するに伴い、完成品として組み立てる際の組立て工数の削減および組み立て易さが求められるとともに、組立てを行う工場に表示モジュールなどを輸送する場合の梱包方法の簡素化が求められている。 As demand for liquid crystal display devices expands around the world, it is required to reduce the number of assembly steps and ease of assembly when assembling as a finished product. Is required.
特開２００９－１３９４２６号公報JP 2009-139426 A
　本発明は、バックキャビネットを有する筐体と、この筐体の内部に設置された平面型表示パネルと、この平面型表示パネルの背面側に配置されたバックライト装置と、平面型表示パネルに画像を表示するための駆動回路を構成する回路基板とを備えたディスプレイ装置において、バックキャビネットは、バックライト装置および回路基板を収容可能な空間部を有するとともに、空間部を形成する内壁面に、バックライト装置を支持するバックライト支持部を有し、かつバックキャビネットの空間部の開口部周縁部に平面型表示パネルを支持するパネル支持部を設け、バックキャビネットの外側から取り付け可能な保持部材により、バックキャビネットにバックライト装置および平面型表示パネルのうちの少なくとも平面型表示パネルを一体に保持したことを特徴とする。 The present invention relates to a housing having a back cabinet, a flat display panel installed in the housing, a backlight device disposed on the back side of the flat display panel, and an image on the flat display panel. And a circuit board that constitutes a drive circuit for displaying the backlight circuit, the back cabinet has a space that can accommodate the backlight device and the circuit board, and the back cabinet has an inner wall that forms the space, By having a backlight support part that supports the light device, and providing a panel support part that supports the flat display panel at the periphery of the opening part of the space part of the back cabinet, by a holding member that can be attached from the outside of the back cabinet, The backlight unit and at least the flat display panel of the flat display panel are integrated into the back cabinet. Characterized in that retained.
図１は、本発明の一実施の形態によるディスプレイ装置としての液晶表示装置を示す正面図である。FIG. 1 is a front view showing a liquid crystal display device as a display device according to an embodiment of the present invention. 図２は、スタンドを取り外した状態を示す同液晶表示装置の斜視図である。FIG. 2 is a perspective view of the liquid crystal display device with the stand removed. 図３は、同液晶表示装置の全体構成の回路ブロックを示すブロック図である。FIG. 3 is a block diagram showing circuit blocks of the entire configuration of the liquid crystal display device. 図４は、バックキャビネットを取り除いた同液晶表示装置の平面図である。FIG. 4 is a plan view of the liquid crystal display device with the back cabinet removed. 図５は、図２における同液晶表示装置の５－５断面図である。FIG. 5 is a cross-sectional view of the liquid crystal display device of FIG. 2 taken along line 5-5. 図６は、図５における同液晶表示装置のＢ部の拡大図である。6 is an enlarged view of a portion B of the liquid crystal display device in FIG. 図７は、同液晶表示装置の分解斜視図である。FIG. 7 is an exploded perspective view of the liquid crystal display device. 図８は、同液晶表示装置の内壁面側のバックキャビネットの斜視図である。FIG. 8 is a perspective view of the back cabinet on the inner wall surface side of the liquid crystal display device. 図９は、同液晶表示装置の表示モジュールの分解斜視図である。FIG. 9 is an exploded perspective view of a display module of the liquid crystal display device. 図１０Ａは、同液晶表示装置の組み立て後の要部の拡大断面図である。FIG. 10A is an enlarged cross-sectional view of a main part after the liquid crystal display device is assembled. 図１０Ｂは、同液晶表示装置の組み立て前の要部の拡大断面図である。FIG. 10B is an enlarged cross-sectional view of a main part before the liquid crystal display device is assembled.
　以下、本発明の一実施の形態によるディスプレイ装置について、液晶表示装置を例にとって図面を参照しながら説明する。 Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings, taking a liquid crystal display device as an example.
　図１は本発明の一実施の形態によるディスプレイ装置としての液晶表示装置を示す正面図、図２はスタンドを取り外した状態を示す同液晶表示装置の斜視図、図３は同液晶表示装置の全体構成の回路ブロックを示すブロック図、図４はバックキャビネットを取り除いた同液晶表示装置の平面図、図５は図２における同液晶表示装置の５－５断面図、図６は図５における同液晶表示装置のＢ部の拡大図、図７は、同液晶表示装置の分解斜視図である。 1 is a front view showing a liquid crystal display device as a display device according to an embodiment of the present invention, FIG. 2 is a perspective view of the liquid crystal display device with a stand removed, and FIG. 3 is an entire liquid crystal display device. FIG. 4 is a plan view of the liquid crystal display device with the back cabinet removed, FIG. 5 is a cross-sectional view of the liquid crystal display device taken along line 5-5 in FIG. 2, and FIG. FIG. 7 is an exploded perspective view of the liquid crystal display device.
　まず、図１、図２に示すように、液晶表示装置は、表示装置本体１と、この表示装置本体１を立てた状態で保持するスタンド２とを有している。表示装置本体１は、平面型表示パネルである液晶表示パネル３とバックライト装置４（図５に図示）とを有する表示モジュールを樹脂成型品などからなる筐体５内に収容することにより構成されている。また、筐体５は、液晶表示パネル３の画像表示領域に対応するように開口部６ａを設けたフロントキャビネット６と、このフロントキャビネット６と組み合わせられるバックキャビネット７とを有する。なお、６ｂはスピーカの音を外部に放出するためのスピーカグリルである。 First, as shown in FIG. 1 and FIG. 2, the liquid crystal display device has a display device body 1 and a stand 2 for holding the display device body 1 in a standing state. The display device body 1 is configured by housing a display module having a liquid crystal display panel 3 which is a flat display panel and a backlight device 4 (shown in FIG. 5) in a housing 5 made of a resin molded product or the like. ing. The housing 5 includes a front cabinet 6 provided with an opening 6 a so as to correspond to the image display area of the liquid crystal display panel 3, and a back cabinet 7 combined with the front cabinet 6. Reference numeral 6b denotes a speaker grill for releasing the sound of the speaker to the outside.
　また、図３、図４に示すように、液晶表示装置全体の概略構成は、液晶表示パネル３に画像を表示する駆動回路とバックライト装置４の点灯を制御する点灯制御回路とを備えた信号処理回路ブロック８と、液晶表示パネル３、バックライト装置４および信号処理回路ブロック８に電源電圧を供給するための電源ブロック９と、テレビジョン放送を受信して信号処理回路ブロック８に受信信号を供給するチューナ１０と、音を出力するためのスピーカ１１とを有する。信号処理回路ブロック８および電源ブロック９は、それぞれ回路基板に回路を構成する部品を搭載することにより構成されている。そして、信号処理回路ブロック８、電源ブロック９、チューナ１０などを搭載した回路基板は、バックライト装置４の背面とバックキャビネット７との間の空間に配置されるように取り付けられている。 As shown in FIGS. 3 and 4, the schematic configuration of the entire liquid crystal display device is a signal including a drive circuit that displays an image on the liquid crystal display panel 3 and a lighting control circuit that controls lighting of the backlight device 4. A processing circuit block 8; a power supply block 9 for supplying a power supply voltage to the liquid crystal display panel 3, the backlight device 4 and the signal processing circuit block 8; and a television broadcast receiving signal to the signal processing circuit block 8. It has a tuner 10 to be supplied and a speaker 11 for outputting sound. The signal processing circuit block 8 and the power supply block 9 are each configured by mounting components constituting a circuit on a circuit board. The circuit board on which the signal processing circuit block 8, the power supply block 9, the tuner 10, and the like are mounted is attached so as to be disposed in a space between the back surface of the backlight device 4 and the back cabinet 7.
　また、図４に示すように、信号処理回路ブロック８は、ＤＶＤプレーヤーなどの外部機器からの映像信号を液晶表示装置に入力するための外部信号入力端子１２を搭載している。 As shown in FIG. 4, the signal processing circuit block 8 includes an external signal input terminal 12 for inputting a video signal from an external device such as a DVD player to the liquid crystal display device.
　なお、図３においては、スピーカを省略して示している。 In FIG. 3, the speaker is omitted.
　ここで、図５～図７に示すように、バックキャビネット７は、液晶表示パネル３とバックライト装置４を有する表示モジュールと、回路基板を収容可能な空間部７ａとを有する。さらに、空間部７ａを形成する内底面には、バックライト装置４を支持するバックライト支持部７ｂ、７ｃが設けられている。このバックライト支持部７ｂ、７ｃのうち、バックライト支持部７ｂには、バックライト装置４のフレーム４ａがビス１３により取り付けられている。 Here, as shown in FIGS. 5 to 7, the back cabinet 7 includes a display module having the liquid crystal display panel 3 and the backlight device 4, and a space 7a capable of accommodating a circuit board. Further, backlight support portions 7b and 7c for supporting the backlight device 4 are provided on the inner bottom surface forming the space portion 7a. Of the backlight support portions 7b and 7c, the frame 4a of the backlight device 4 is attached to the backlight support portion 7b with screws 13.
　また、バックキャビネット７の内底面の周縁部には、液晶表示パネル３の外周縁部を支持する樹脂成型品であって、パネル支持部材１４を保持するためのパネル支持部７ｄが設けられている。また、パネル支持部材１４により液晶表示パネル３の外周縁部が支持されている。さらに、断面形状が略Ｌ字形状の金属製のフレーム１５により液晶表示パネル３の外周縁部がパネル支持部材１４に押し付けられている。この押し付けによって、液晶表示パネル３がバックキャビネット７の空間部７ａの開口部周縁部に収容配置されている。なお、３ａは液晶表示パネル３の表示面に貼り付けられている偏光フィルムである。 A panel support portion 7 d for holding the panel support member 14, which is a resin molded product that supports the outer periphery portion of the liquid crystal display panel 3, is provided at the peripheral portion of the inner bottom surface of the back cabinet 7. . Further, the outer peripheral edge portion of the liquid crystal display panel 3 is supported by the panel support member 14. Further, the outer peripheral edge of the liquid crystal display panel 3 is pressed against the panel support member 14 by a metal frame 15 having a substantially L-shaped cross section. By this pressing, the liquid crystal display panel 3 is accommodated and arranged at the peripheral edge of the opening of the space 7 a of the back cabinet 7. In addition, 3a is a polarizing film affixed on the display surface of the liquid crystal display panel 3. FIG.
　ここで、バックキャビネット７の空間部７ａの開口部に配置された液晶表示パネル３は、バックライト装置４の背面側に配置した駆動回路を構成する回路基板に、バックライト装置４の外周に沿うように配置されるフレキシブル配線板（図示せず）を介して電気的に接続されている。 Here, the liquid crystal display panel 3 disposed in the opening of the space portion 7 a of the back cabinet 7 extends along the outer periphery of the backlight device 4 on the circuit board constituting the drive circuit disposed on the back side of the backlight device 4. It is electrically connected via a flexible wiring board (not shown) arranged as described above.
　さらに、図６に示すように、バックキャビネット７は、その外周先端部７ｅをフロントキャビネット６の内周壁面に設けた嵌め合せ片６ｃに嵌め合せている。そして、フロントキャビネット６をバックキャビネット７に、フロントキャビネット６側からビスで取り付けることにより、表示モジュールや駆動回路を搭載した回路基板を筐体に収容している。図８は同液晶表示装置の内壁面側のバックキャビネットの斜視図であり、バックキャビネット７の外周部に設けたボス部７ｆにフロントキャビネット６がビスにて取り付けられる。 Furthermore, as shown in FIG. 6, the back cabinet 7 has its outer peripheral tip 7 e fitted into a fitting piece 6 c provided on the inner peripheral wall surface of the front cabinet 6. Then, by attaching the front cabinet 6 to the back cabinet 7 with screws from the front cabinet 6 side, the circuit board on which the display module and the drive circuit are mounted is accommodated in the housing. FIG. 8 is a perspective view of the back cabinet on the inner wall surface side of the liquid crystal display device, and the front cabinet 6 is attached to a boss portion 7 f provided on the outer peripheral portion of the back cabinet 7 with screws.
　図９は同液晶表示装置の表示モジュールの分解斜視図である。図９に示すように、バックライト装置４は、液晶表示パネル３を背面側から照明するものである。このバックライト装置４は、フレーム４ａ内に液晶表示パネル３と平行となるように配列された複数本の線状光源１６と、フレーム４ａに蓋をするように配置された拡散板１７とを備えている。 FIG. 9 is an exploded perspective view of the display module of the liquid crystal display device. As shown in FIG. 9, the backlight device 4 illuminates the liquid crystal display panel 3 from the back side. The backlight device 4 includes a plurality of linear light sources 16 arranged in a frame 4a so as to be parallel to the liquid crystal display panel 3, and a diffusion plate 17 arranged so as to cover the frame 4a. ing.
　拡散板１７上には、拡散板１７を透過した光を拡散または集光するプリズムシートなどの光学シート１８が積層されている。 On the diffusion plate 17, an optical sheet 18 such as a prism sheet that diffuses or collects light transmitted through the diffusion plate 17 is laminated.
　フレーム４ａの内底面には、線状光源１６から発せられる光を拡散板１７側に反射する金属箔などからなる反射シート１９が略全面的に覆うように配設されている。また、線状光源１６の延在方向に離間して、線状光源１６を保持するための一対の支持部材２０が配置されている。 On the inner bottom surface of the frame 4a, a reflection sheet 19 made of a metal foil or the like that reflects light emitted from the linear light source 16 toward the diffuser plate 17 is disposed so as to cover substantially the entire surface. In addition, a pair of support members 20 for holding the linear light source 16 are disposed apart from each other in the extending direction of the linear light source 16.
　ここで、線状光源１６としては、直管状の冷陰極蛍光ランプ（ＣＣＦＬ）が用いられており、これらが互いに平行に配列されている。そして、線状光源１６の両端部が支持部材２０で覆われている。また、フレーム４ａは、鉄等の金属または樹脂で構成される。このフレーム４ａは、一方向に開口する箱形状をしており、線状光源１６の配列面と平行な底面を構成する底壁と、この底壁の周縁部から立ち上がる側壁とを有する。さらに、フレーム４ａの内底面には、拡散板１７を支持する拡散板支持部材２１が複数個配置されている。 Here, a straight tubular cold cathode fluorescent lamp (CCFL) is used as the linear light source 16, and these are arranged in parallel to each other. Both ends of the linear light source 16 are covered with the support member 20. The frame 4a is made of metal such as iron or resin. The frame 4a has a box shape that opens in one direction, and includes a bottom wall that forms a bottom surface parallel to the arrangement surface of the linear light sources 16, and a side wall that rises from the peripheral edge of the bottom wall. Further, a plurality of diffusion plate support members 21 that support the diffusion plate 17 are arranged on the inner bottom surface of the frame 4a.
　拡散板１７は、線状光源１６と液晶表示パネル３との間に配設されている。この拡散板１７は、線状光源１６側の入射面から入射した光を拡散して液晶表示パネル３側の出射面から出射するものであり、ポリスチレンやポリカーボネートなどの透明な樹脂を射出成形して形成されている。 The diffusion plate 17 is disposed between the linear light source 16 and the liquid crystal display panel 3. The diffuser plate 17 diffuses light incident from the incident surface on the linear light source 16 side and emits it from the exit surface on the liquid crystal display panel 3 side, and is formed by injection molding a transparent resin such as polystyrene or polycarbonate. Is formed.
　具体的には、図９のように、線状光源１６を挟んで反射シート１９と反対側に拡散板１７が配設されている。この拡散板１７は、線状光源１６からの直射光および反射シート１９からの反射光を内部に入射させる入射面と、内部で拡散した光を出射させる出射面とを有している。 Specifically, as shown in FIG. 9, a diffusion plate 17 is disposed on the opposite side of the reflection sheet 19 with the linear light source 16 interposed therebetween. The diffusion plate 17 has an incident surface on which the direct light from the linear light source 16 and the reflected light from the reflection sheet 19 are incident, and an output surface from which the diffused light is emitted.
　上述した光学シート１８は出射面上に積層配置されている。 The optical sheet 18 described above is laminated on the exit surface.
　図１０Ａは同液晶表示装置の組み立て後の要部の拡大断面図、図１０Ｂは同液晶表示装置の組み立て前の要部の拡大断面図である。 FIG. 10A is an enlarged cross-sectional view of the main part after the liquid crystal display device is assembled, and FIG. 10B is an enlarged cross-sectional view of the main part before the liquid crystal display device is assembled.
　図１０Ａ、Ｂに示すように、同液晶表示装置は、バックキャビネット７の外側から取り付け可能な保持部材としてのビス２２により、バックキャビネット７に液晶表示パネル３を一体に保持したものである。すなわち、フロントキャビネット６にビス２３により取り付けたフレーム１５と、バックキャビネット７にビス２４により取り付けたバックライト装置４とにより液晶表示パネル３の外周縁部を挟持している。そして、この状態でバックキャビネット７の外側から、フロントキャビネット６をバックキャビネット７にビス２２により固定したものである。 As shown in FIGS. 10A and 10B, the liquid crystal display device integrally holds the liquid crystal display panel 3 in the back cabinet 7 with screws 22 as holding members that can be attached from the outside of the back cabinet 7. That is, the outer peripheral edge of the liquid crystal display panel 3 is sandwiched between the frame 15 attached to the front cabinet 6 with screws 23 and the backlight device 4 attached to the back cabinet 7 with screws 24. In this state, the front cabinet 6 is fixed to the back cabinet 7 with screws 22 from the outside of the back cabinet 7.
　このような構成とすることにより、図１０Ａの組み立てた状態からビス２２を取り外すことにより、図１０Ｂのように、フロントキャビネット６と液晶表示パネル３とを容易に取り外すことができる。よって、装置の故障時などに、液晶表示パネルやバックライト装置を交換する場合の作業も行い易くなる。 With such a configuration, the front cabinet 6 and the liquid crystal display panel 3 can be easily detached as shown in FIG. 10B by removing the screws 22 from the assembled state of FIG. 10A. Therefore, it becomes easy to perform work when the liquid crystal display panel or the backlight device is replaced when the device breaks down.
　なお、図１０Ａ、Ｂに示す例においては、バックライト装置４はバックキャビネット７に別のビス２４により取り付けている。上述したように、バックライト支持部７ｃでバックライト装置４をバックキャビネット７内に支持して配置しているため、ビス２２をバックライト装置４の取り付けと液晶表示パネル３の取り付けに共用して使用し、ビス２２のみで液晶表示パネル３とバックライト装置４の両方をバックキャビネット７に一体に保持する構成としてもよい。 In the example shown in FIGS. 10A and 10B, the backlight device 4 is attached to the back cabinet 7 with another screw 24. As described above, since the backlight device 4 is supported and arranged in the backlight cabinet 7 by the backlight support portion 7 c, the screw 22 is shared for the attachment of the backlight device 4 and the attachment of the liquid crystal display panel 3. It is also possible to employ a configuration in which both the liquid crystal display panel 3 and the backlight device 4 are integrally held in the back cabinet 7 using only the screws 22.
　このように本発明においては、バックキャビネット７を有する筐体と、この筐体の内部に収容される液晶表示パネル３およびバックライト装置４と、液晶表示パネル３に画像を表示するための駆動回路を構成する回路基板とを備えた液晶表示装置において、バックキャビネット７は、バックライト装置４および回路基板を収容可能な空間部７ａを有するとともに、空間部７ａを形成する内壁面に、バックライト装置４を支持するバックライト支持部７ｂ、７ｃを設け、かつバックキャビネット７の空間部７ａの開口部周縁部に前記液晶表示パネル３を支持するパネル支持部７ｄを設け、バックキャビネット７の外側から取り付け可能な保持部材であるビス２２により、バックキャビネット７にバックライト装置４および液晶表示パネル３のうちの少なくとも液晶表示パネル３を一体に保持したものである。 As described above, in the present invention, the casing having the back cabinet 7, the liquid crystal display panel 3 and the backlight device 4 accommodated in the casing, and the drive circuit for displaying an image on the liquid crystal display panel 3. In the liquid crystal display device including the circuit board that constitutes the backlight board 7, the backlight cabinet 7 has a space portion 7a that can accommodate the backlight device 4 and the circuit board, and a backlight device on an inner wall surface that forms the space portion 7a. 4 is provided, and a panel support 7d for supporting the liquid crystal display panel 3 is provided at the periphery of the opening 7a of the space 7a of the back cabinet 7, and is attached from the outside of the back cabinet 7. Screws 22 that are possible holding members allow the backlight device 4 and the liquid crystal display panel 3 to be attached to the back cabinet 7. Chino is obtained by integrally holding at least liquid crystal display panel 3.
　これにより、バックキャビネット７を基準にして、バックキャビネット７内にバックライト装置４、液晶表示パネル３を順次組み込むことにより、完成品の組立てを行うことができる。このため、バックライト装置４と液晶表示パネル３とからなる表示モジュールを組立てるとともに、液晶表示パネル３やバックライト装置の駆動回路を搭載した回路基板を取付け、その後筐体内に収容する場合に比べ、組み立て易くなる。 Thus, the assembled product can be assembled by sequentially incorporating the backlight device 4 and the liquid crystal display panel 3 into the back cabinet 7 with reference to the back cabinet 7. Therefore, assembling a display module composed of the backlight device 4 and the liquid crystal display panel 3 and attaching a circuit board on which the drive circuit of the liquid crystal display panel 3 and the backlight device is mounted and then housed in the housing, Easy to assemble.
　しかも、バックキャビネット７の外側から取り付け可能なビス２２により、前記バックキャビネット７に前記バックライト装置４および前記液晶表示パネル３のうちの少なくとも液晶表示パネル３を一体に保持した構造であるため、装置の故障時などに、液晶表示パネルやバックライト装置を交換する場合の作業も行い易くなるという効果が得られる。 In addition, since the back cabinet 7 and at least the liquid crystal display panel 3 of the liquid crystal display panel 3 are integrally held in the back cabinet 7 by screws 22 that can be attached from the outside of the back cabinet 7, the apparatus In the event of a failure, the effect of facilitating the work for replacing the liquid crystal display panel and the backlight device can be obtained.
　以上のように本発明は、液晶ディスプレイ等の各種のディスプレイ装置に適用できる。 As described above, the present invention can be applied to various display devices such as a liquid crystal display.
　１　　表示装置本体
　３　　液晶表示パネル
　４　　バックライト装置
　５　　筐体
　６　　フロントキャビネット
　７　　バックキャビネット
　７ａ　　空間部
　７ｂ，７ｃ　　バックライト支持部
　７ｄ　　パネル支持部
　１４　　パネル支持部材
　１５　　フレーム DESCRIPTION OF SYMBOLS 1 Display apparatus main body 3 Liquid crystal display panel 4 Backlight apparatus 5 Case 6 Front cabinet 7 Back cabinet 7a Space part 7b, 7c Backlight support part 7d Panel support part 14 Panel support member 15 Frame

Claims (1)

  1. バックキャビネットを有する筐体と、この筐体の内部に設置された平面型表示パネルと、この平面型表示パネルの背面側に配置されたバックライト装置と、前記平面型表示パネルに画像を表示するための駆動回路を構成する回路基板とを備えたディスプレイ装置において、前記バックキャビネットは、前記バックライト装置および前記回路基板を収容可能な空間部を有するとともに、前記空間部を形成する内壁面に、前記バックライト装置を支持するバックライト支持部を有し、かつ前記バックキャビネットの空間部の開口部周縁部に前記平面型表示パネルを支持するパネル支持部を設け、前記バックキャビネットの外側から取り付け可能な保持部材により、前記バックキャビネットに前記バックライト装置および前記平面型表示パネルのうちの少なくとも平面型表示パネルを一体に保持したことを特徴とするディスプレイ装置。 A casing having a back cabinet, a flat display panel installed inside the casing, a backlight device disposed on the back side of the flat display panel, and an image displayed on the flat display panel In the display device comprising a circuit board that constitutes a drive circuit for the back cabinet, the back cabinet has a space that can accommodate the backlight device and the circuit board, and an inner wall surface that forms the space, A backlight support part for supporting the backlight device is provided, and a panel support part for supporting the flat display panel is provided at the periphery of the opening of the space part of the backlight cabinet, which can be attached from the outside of the backlight cabinet. With the use of a holding member, the backlight device and the flat display panel are mounted on the back cabinet. Display apparatus characterized by holding together at least flat display panel.
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WO2021027154A1 (en) * 2019-08-15 2021-02-18 Tcl华星光电技术有限公司 Liquid crystal display screen
US11036072B2 (en) 2019-08-15 2021-06-15 Tcl China Star Optoelectronics Technology Co., Ltd. Liquid crystal display panel

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