JP4924349B2 - The liquid crystal display device - Google Patents

The liquid crystal display device Download PDF

Info

Publication number
JP4924349B2
JP4924349B2 JP2007260655A JP2007260655A JP4924349B2 JP 4924349 B2 JP4924349 B2 JP 4924349B2 JP 2007260655 A JP2007260655 A JP 2007260655A JP 2007260655 A JP2007260655 A JP 2007260655A JP 4924349 B2 JP4924349 B2 JP 4924349B2
Authority
JP
Grant status
Grant
Patent type
Prior art keywords
liquid crystal
reflector
bottom case
crystal panel
bottom
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
JP2007260655A
Other languages
Japanese (ja)
Other versions
JP2008033361A (en )
Inventor
俊哉 西尾
拓也 西本
昭男 谷繁
Original Assignee
セイコーエプソン株式会社
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
Grant date

Links

Images

Description

本発明は、主に19インチ以上の比較的大型の液晶表示に適した液晶表示装置に関するものである。 The present invention relates primarily to a liquid crystal display device which is suitable for relatively large liquid crystal display of over 19 inches.

主に19インチ以上の比較的大型の液晶パネルで、液晶パネルの背面に直下型の蛍光ランプを収納配置したランプ室を設け、このランプ室と液晶パネルとの間に光拡散板を配置したものでは、光拡散板をランプ室の外周縁で支持している為、光拡散板の中央が自重により湾曲し、液晶パネルの表示品質等に影響を及ぼすという問題がある。 Those primarily for over 19 inches relatively large liquid crystal panel, a lamp chamber that houses arranged direct-type fluorescent lamps to the back of the liquid crystal panel is provided, arranged a light diffusing plate between the lamp chamber and the liquid crystal panel in order that the light diffusing plate is supported by the outer peripheral edge of the lamp chamber, curved central light diffusion plate due to its own weight, there is a problem that affects the display quality of the liquid crystal panel or the like.
一方、上記問題点を解消すべく、例えば特開平7−56141号公報や、特開2001− On the other hand, in order to solve the above problems, and Japanese Unexamined Patent Publication No. 7-56141, JP 2001-
266634号公報に示される様に、拡散板やシートの中心部分とその周囲、或いは液晶パネルの略全面を複数のピン状支持部材で支持したものがあるが、前者の中心部分のみで支持する場合、液晶パネルの大型化に伴って荷重が中心に集中して変形し、その周囲に配置した支持部材が機能しないで輝度むらが発生し易いという問題があり、後者の場合には、上記前者の問題と併せて支持部材の中で実際に機能している部分は数点であり、無駄となる支持部材があるという問題がある。 As shown in 266,634, JP-central portion and the surrounding diffusion plate or sheet, or there are those supporting substantially the whole surface of the liquid crystal panel by a plurality of pin-like support member, to support only the central portion of the former deforms concentrated in the central load with the size of the liquid crystal panel, there is liable luminance unevenness occurs not function support member disposed therearound, in the latter case, the former are actually functional part in the problem in conjunction with the support member is a few points, there is a problem that there is a support member which is a waste.
特開平7−56141号公報 JP 7-56141 discloses 特開2001−266634号公報 JP 2001-266634 JP

そこで本発明は、バックライトの光拡散板やシート類を効果的に支持し、これらの変形を確実に防止すると同時に、部品点数の削減によるコストダウン等を計る事を目的とするものである。 The present invention is effectively supports the light diffusion plate or sheet of the backlight, while preventing these variations reliably, and an object thereof is to measure the cost or the like by reducing the number of parts.

本発明は、液晶パネルと、前記液晶パネルの背面に配置された複数の蛍光ランプと、開口部を有する底ケースと、前記液晶パネルと前記蛍光ランプとの間に配置され、前記開口部において外縁部が載置された拡散板と、前記底ケース内において前記蛍光ランプ間に配置されており、前記底ケースの底面に対して前記液晶パネルの側に突出する2つの傾斜面と、前記拡散板を支持する支持突起と、を有するリフレクタと、を有する直下型のバックライト方式の液晶表示装置において、前記底ケースの前記リフレクタと重なる位置には孔が設けられており、前記リフレクタと前記底ケースは、前記孔を介して前記底ケースの背面側かビス留めされることによって固定されていることを特徴とする。 The present invention includes a liquid crystal panel, and the liquid crystal panel a plurality of fluorescent lamps arranged in back of, are disposed between the bottom case having an opening, and the liquid crystal panel and the fluorescent lamp, the outer edge at the opening a diffusion plate part is placed, and the in the bottom case is arranged between the fluorescent lamps, two inclined surfaces which project to the side of the liquid crystal panel with respect to the bottom surface of the bottom case, the diffusion plate in the liquid crystal display device of the direct backlight system with a reflector having a supporting protrusion for supporting the a, above the reflector overlaps the position of the bottom case and hole is provided, the said reflector bottom case It is characterized by being fixed by being rear side or et screwing of the bottom casing through the hole.
また、上記において、本発明は、前記底ケース内には、底面上に反射板が設けられ、前記リフレクタは前記反射板上に配置されており、前記リフレクタと前記底ケースとの間に前記反射板を挟んだ状態で、前記底ケースと前記リフレクタは固定されていることを特徴とする。 In the above, the present invention is in the bottom case, the reflecting plate is provided on the bottom surface, wherein the reflector is disposed on the reflection plate, the reflected between the reflector and the bottom case while sandwiching the plate, the reflector and the bottom case is characterized in that it is fixed.

又本発明は、支持突起を、液晶パネルの対角線を略3等分する位置に形成して成るものである。 The present invention, the support projections, those obtained by forming a diagonal of the liquid crystal panel in a substantially trisected position.

本発明の構成により、ランプ室に並列配置した複数の蛍光ランプ間に底面に対して前記液晶パネルの側に突出して傾斜する2つの傾斜面と、前記拡散板を支持する支持突起と、を有したリフレクタを配置したものにおいて、このリフレクタの液晶パネル中央部よりコーナー寄りの数箇所に光拡散板を支持する支持突起を設けたことで、これら支持部材にて光拡散板等の荷重を略均等に分散して支持する事が出来、これによりわずかな支持突起で効果的に光拡散板等を支持し、これらの変形による表示品質の低下を防止する事が出来るものである。 The configuration of the present invention, the two inclined surfaces inclined protruding on a side of the liquid crystal panel with respect to the bottom surface between the plurality of fluorescent lamps arranged in parallel to the lamp chamber, and a support protrusion for supporting the diffusion plate, a perforated in that place the reflector, by providing the support protrusions for supporting the light diffusing plate at several locations of the corner toward a liquid crystal panel central portion of the reflector, substantially uniform load, such as a light diffusing plate at these support members dispersed it is possible to support the, thereby effectively supporting the light diffusion plate or the like with little support projections, in which it is possible to prevent a decrease in display quality due to these variations.

又本発明の構成により、支持突起を液晶パネルの対角線を略3等分する位置に形成したことで、光拡散板等のたわみ量が略等しい位置にてこれらを確実に支持し、支持部材が受ける荷重を略均等に分散し、支持荷重の片寄りによる光拡散板等の変形を防止する事が出来るものである。 The configuration of the present invention also the support protrusion that is formed into a substantially trisected position diagonal liquid crystal panel, the amount of deflection of the light diffusion plate or the like is reliably supporting the at substantially equal positions, the support member substantially uniformly dispersing the load received, in which it is possible to prevent deformation of the light diffusing plate due deviation of the supporting load.

本発明の実施例を先ず図1に基づき説明すると、1は例えば19インチ以上の比較的大型で横長の液晶表示装置で、バックライト装置2の前面に、大画面に適したSTN液晶パネルやTFT液晶パネルにて構成した液晶表示器3を連結して構成している。 When examples First will be described with reference to FIG. 1 of the present invention, 1 is in the horizontally long liquid crystal display device of a relatively large or 19 inches for example, the front surface of the backlight device 2, STN liquid crystal panel or TFT suitable for large screen It is constructed by connecting a liquid crystal display device 3 constituted by a liquid crystal panel.

一方、上記バックライト装置2は、図2にても示す様に、有底箱状の底ケース4の開口部5に、板厚が2〜3mm程度でアクリルやポリカーボネート等の透光性樹脂からなる光拡散板6を配置していると共に、この光拡散板の前面に集光性シート7・・等を積層したシート類を配置して構成している。 On the other hand, the backlight device 2, as shown also in FIG. 2, the opening 5 of the bottomed box-shaped bottom case 4, the plate thickness of a transparent resin such as acrylic or polycarbonate with about 2~3mm a light diffusing plate 6 made with are arranged, it is constructed by arranging the sheets obtained by laminating the light-collecting sheet 7 .. etc. in front of the light diffuser plate.

又、上記底ケース4の開口部5口縁には、該部を外側に向けて折曲して鍔部8を一体形成し、この鍔部に上記光拡散板6等の外周縁を載置していると共に、上記鍔部8に板金を略L字状に折曲成形したセンターシャーシ9をビス10留めし、このセンターシャーシの上片11と上記鍔部8により、上記光拡散板6やシート類を固定している。 Further, the opening 5 necked rim of the bottom case 4, integrally formed a flange portion 8 and bent toward the portion on the outside, placing the outer peripheral edge such as the light diffuser plate 6 on the flange portion together we are a center chassis 9 molded bending sheet metal into a substantially L-shape to the flange portion 8 bis 10 fastened by the upper piece 11 and the flange portion 8 of the center chassis, Ya the light diffusing plate 6 securing the sheets.

更に上記液晶表示器3は、2枚の透明電極付きガラス基板12,12の間に液晶を封入し、かつこれらガラス基板の前後に偏向板や位相差板等の光学シート13,13を配置して構成した液晶パネル14を、上記センターシャーシ9の上片11の前面に載置し、そして、断面略L字状で金属性薄板の成形品から成る外枠15を上記センターシャーシ9にビス16・・止めすることで、センターシャーシ9の上片11と外枠15の前辺17との間に液晶パネル14を固定して構成している。 Further the liquid crystal display 3, a liquid crystal is sealed between two transparent electrode-bearing glass substrate 12, 12, and place the optical sheets 13 and 13 such as deflector plate or a retardation plate before and after the glass substrates the liquid crystal panel 14 configured Te was placed in front of the upper piece 11 of the center chassis 9 and bis an outer frame 15 made of a molded product of a metal thin plate in a substantially L-shaped cross section in the center chassis 9 16 ... by stopping, it is configured by fixing the liquid crystal panel 14 between the front edge 17 of the upper piece 11 and the outer frame 15 of center chassis 9.

又、上記底ケース4の内部にはランプ室18を区画形成していると共に、底ケース4の内面には、内表面を光反射率の高い白色系に着色した反射板19を配置し、かつ上記ランプ室18内部には、冷陰極蛍光管や熱陰極蛍光管等から成る複数の蛍光ランプ20・・を横並びにて、所謂直下型に収納配置している。 Further, the inside of the bottom case 4 are defining a lamp chamber 18, the inner surface of the bottom case 4, to place the reflecting plate 19 colored inner surface to a high white light reflectance, and inside the lamp chamber 18, a plurality of fluorescent lamps 20 ... consisting of cold cathode fluorescent tubes or hot cathode fluorescent tube or the like in side by side, are housed and arranged in a so-called direct type.

一方、上記反射板19の底面上には図3にても示す様に上記蛍光ランプ20・・間に位置して、ポリカーボネート等の樹脂材にて成形した断面が三角形状の複数のリフレクタ2 On the other hand, on the bottom surface of the reflector 19 located between ... the fluorescent lamp 20 as shown also in FIG. 3, the molded section of resin material such as polycarbonate is more triangular reflector 2
1・・を所定の間隔を置いて並列配置し、これらを背面よりビス22・・固定し、蛍光ランプ20・・から放射された光を光拡散板6に向けて反射する様に構成している。 1 ... arranged in parallel at predetermined intervals, these screws 22 ... fixed from the back, and constructed such that reflects the light emitted from the fluorescent lamps 20 ... on the light diffusing plate 6 there. 尚、上記リフレクタ21・・の材質に高反射グレードを用いることで、液晶パネル14の輝度を向上する事ができる。 Incidentally, by using a highly reflective grade material of the reflector 21 ..., it can be improved brightness of the liquid crystal panel 14.

又、上記リフレクタ21・・には、図4にても示す様に、上記底ケース4の開口部5の対角線23,23を略3等分する位置に近接する4箇所に、先端を上記光拡散板6の背面に当接してこれを支持するピン状の支持突起24・・を一体的に突出形成している。 Further, the above-mentioned reflector 21 ..., as shown also in FIG. 4, at four positions in the vicinity of the diagonal line 23, 23 of the opening 5 of the bottom case 4 to substantially divided into three equal parts positioned, the optical tip projecting integrally formed pin-shaped support projections 24 ... for supporting the contact with the back surface of the diffusion plate 6.

更に、上記反射板19のリフレクタ21・・取付け位置には抜き孔25・・を穿孔すると共に、これに対向位置して底ケース4に座押し26・・を一体に折曲形成し、これら座押し部分にて上記ビス22・・固定を行っている。 Furthermore, with the reflector 21 ... mounting position of the reflector 19 to drill vent holes 25 ..., to which form folding a seat press 26 ... integrally with the bottom case 4 facing position, these seats We are subjected to the above-mentioned screws 22 ... fixed at the press part. これにより、座押し26・・にてリフレクタ21・・の位置決めを簡単かつ確実に行う事が出来ると共に、ビス22・・の締め付けにより発生する応力による反射板19の変形を防止し、変形による乱反射による液晶パネル14の輝度むら等を防止出来るものである。 Thus, it is possible to perform at the seat press 26 ... positioning of the reflector 21 ... easily and reliably, to prevent deformation of the reflecting plate 19 due to the stress caused by tightening of the screws 22 .., irregular reflection due to the deformation those capable of preventing the brightness unevenness of the liquid crystal panel 14 due.

上記支持突起24・・にて、光拡散板6や集光性シート7・・等のシート類を支持することで、これらのたわみ量が略等しい位置にて、光拡散板6等の荷重を略均等に分散させて支持突起24・・にて効率的に支持する事ができ、支持個所の削減に伴う部品点数の削減によるコストダウンを計る事が出来ると同時に、光拡散板6等の変形による表示品質の低下等を防止する事が出来るものである。 At the support projections 24 ..., by supporting a light diffusing plate 6 and the light-collecting sheet 7 sheet such as ..., at these deflection amount approximately equal position, a load such as a light diffusion plate 6 substantially not evenly distributed efficiently it can be supported by the support projections 24 ... are, at the same time it is possible to measure the cost by reducing the number of parts due to reduction of the support points, deformation, such as an optical diffusing plate 6 it is what you can to prevent the deterioration of the display quality by.

尚、上記実施例にて示す支持突起24・・の位置はこれに限定されるものではなく、液晶パネル14の大きさ等に応じて適宜設定すれば良い。 The position of the support projections 24 ... shown in the above embodiment is not limited thereto, it may be appropriately set according to the size of the liquid crystal panel 14. 又、上記実施例では支持突起24 Also, the support projection in the above Example 24
・・をリフレクタ21・・に一体成形しているが、これに限定されることなく、例えばリフレクタ21・・の支持突起24・・形成部分に取付孔を穿孔し、別部材として成形した支持突起24・・をビスや接着剤で固定しても良い。 Although integrally molded to the reflector 21 ... to ..., without being limited thereto, drilling a mounting hole, for example, in the support projections 24 ... forming part of the reflector 21 ..., molded support projection as a separate member it may be fixed to 24 ... with screws or adhesive. index4index4 index4index4

本発明による実施例を示す分解斜視図である。 Is an exploded perspective view showing an embodiment according to the present invention. 同じく要部の側面縦断面図である。 2 is a side longitudinal sectional view of a main part. 同じく要部の側面縦断面図である。 2 is a side longitudinal sectional view of a main part. 同じくバックライト装置の平面図である。 Also is a plan view of the backlight device.

符号の説明 DESCRIPTION OF SYMBOLS

6 光拡散板14 液晶パネル18 ランプ室19 反射板20 蛍光ランプ21 反射材24 支持突起 6 light diffuser 14 liquid crystal panel 18 lamp chamber 19 reflector 20 fluorescent lamp 21 reflector 24 supporting protrusion

Claims (2)

  1. 液晶パネルと、 And a liquid crystal panel,
    前記液晶パネルの背面に配置された複数の蛍光ランプと、 A plurality of fluorescent lamps arranged on a rear surface of the liquid crystal panel,
    開口部を有する底ケースと、 A bottom case having an opening,
    前記液晶パネルと前記蛍光ランプとの間に配置され、前記開口部において外縁部が載置された拡散板と、 Wherein disposed between the liquid crystal panel and the fluorescent lamp, a diffusion plate outer edge is placed in the opening,
    前記底ケース内において前記蛍光ランプ間に配置されており、前記底ケースの底面に対して前記液晶パネルの側に突出する2つの傾斜面と、前記拡散板を支持する支持突起と、を有するリフレクタと、 Wherein in the bottom case is arranged between the fluorescent lamps, a reflector having two inclined surfaces which project to the side of the liquid crystal panel with respect to the bottom surface of the bottom case, and a support projection for supporting the diffuser plate When,
    を有する直下型のバックライト方式の液晶表示装置において、 In the liquid crystal display device of the direct backlight system having,
    前記底ケースの前記リフレクタと重なる位置には孔が設けられており、前記リフレクタと前記底ケースは、前記孔を介して前記底ケースの背面側かビス留めされることによって固定されていることを特徴とする液晶表示装置。 Wherein the said reflector overlaps the position of the bottom case and hole is provided, said reflector and said bottom case and secured by being rear side or et screwing of the bottom case through the hole the liquid crystal display device according to claim.
  2. 前記底ケース内には、底面上に反射板が設けられ、前記リフレクタは前記反射板上に配置されており、前記リフレクタと前記底ケースとの間に前記反射板を挟んだ状態で、前記底ケースと前記リフレクタは固定されていることを特徴とする請求項1に記載の液晶表示装置。 Within the bottom case, the reflecting plate is provided on the bottom surface, wherein the reflector is disposed on the reflective plate, in the state sandwiching the reflector between the reflector and the bottom case, said bottom the liquid crystal display device according to claim 1, case and the reflector is characterized in that it is fixed.
JP2007260655A 2007-10-04 2007-10-04 The liquid crystal display device Expired - Fee Related JP4924349B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007260655A JP4924349B2 (en) 2007-10-04 2007-10-04 The liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007260655A JP4924349B2 (en) 2007-10-04 2007-10-04 The liquid crystal display device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2002165031 Division 2002-06-06

Publications (2)

Publication Number Publication Date
JP2008033361A true JP2008033361A (en) 2008-02-14
JP4924349B2 true JP4924349B2 (en) 2012-04-25

Family

ID=39122760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007260655A Expired - Fee Related JP4924349B2 (en) 2007-10-04 2007-10-04 The liquid crystal display device

Country Status (1)

Country Link
JP (1) JP4924349B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8238516B2 (en) 2008-01-09 2012-08-07 Kabushiki Kaisha Toshiba Radiotherapy support apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0695105A (en) * 1991-01-21 1994-04-08 Toshiba Corp Back light for liquid crystal module
JPH05119313A (en) * 1991-10-24 1993-05-18 Nec Corp Back light
JPH05119316A (en) * 1991-10-25 1993-05-18 Canon Inc Back light device
JP3205373B2 (en) * 1992-03-12 2001-09-04 日立デバイスエンジニアリング株式会社 The liquid crystal display device
JPH0764084A (en) * 1993-08-31 1995-03-10 Toshiba Lighting & Technol Corp Illumination device, liquid crystal display device, back light and display device
JPH10326517A (en) * 1997-05-23 1998-12-08 Tama Electric Co Ltd Back surface lighting device
JP2001210126A (en) * 2000-01-31 2001-08-03 Sharp Corp Lamp holder and back light device

Also Published As

Publication number Publication date Type
JP2008033361A (en) 2008-02-14 application

Similar Documents

Publication Publication Date Title
US6974221B2 (en) Support for backlight module
US6930734B2 (en) Liquid crystal display module and liquid crystal display apparatus having the same
US20090033827A1 (en) Optical film support arrangement, and backlight module and lcd using the same
US20080291356A1 (en) Backlight assembly and liquid crystal display having the same
US20090027584A1 (en) Liquid crystal display with a backlight assembly having an improved structure
JP2005158707A (en) Backlight device and liquid crystal display device using it
US20080225197A1 (en) Backlight device and display apparatus
JP2004192912A (en) Direct backlight
JP2002090736A (en) Backlight for flanar display device
CN101004507A (en) Backlight module
CN101017281A (en) Back light system
US20080106667A1 (en) Liquid crystal display apparatus
JP2008197166A (en) Liquid crystal display device
CN101561101A (en) Backlight module
CN1567059A (en) Backlight module
CN101261789A (en) Display device
US7762708B2 (en) Backlight assembly, display apparatus having the same and method of assembling the same
US20100073596A1 (en) backlight assembly having an elastic supporting member for supporting optical member and a display apparatus having the same
US7327416B2 (en) Back light assembly and liquid crystal display device having the same
WO2009104448A1 (en) Illumination device, display device, and television receiving device
US20080030649A1 (en) Hybrid diffusion plate, backlight assembly having hybrid diffusion plate, and liquid crystal display having backlight assembly
CN201954497U (en) Bracket and led backlight module
JP2010170138A (en) Display device
JP2006208466A (en) Direct backlight
CN1987599A (en) Direct downward back light module

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100622

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100818

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101012

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101210

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110913

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20111114

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20111206

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20111214

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120110

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20120123

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150217

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees