JPS62102226A - Illuminating structure for liquid crystal television device - Google Patents
Illuminating structure for liquid crystal television deviceInfo
- Publication number
- JPS62102226A JPS62102226A JP60243316A JP24331685A JPS62102226A JP S62102226 A JPS62102226 A JP S62102226A JP 60243316 A JP60243316 A JP 60243316A JP 24331685 A JP24331685 A JP 24331685A JP S62102226 A JPS62102226 A JP S62102226A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- fluorescent tube
- crystal panel
- light
- crystal television
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/32—Special longitudinal shape, e.g. for advertising purposes
- H01J61/327—"Compact"-lamps, i.e. lamps having a folded discharge path
-
- 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
- G02F1/133604—Direct backlight with lamps
Landscapes
- 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
Description
【発明の詳細な説明】
（産業上の利用分野］
本発明はテレビ画像を表示する液晶パネルを内臓する液
晶テレビ装置の、液晶パネルを装置内面から照明する照
明構造に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an illumination structure for illuminating the liquid crystal panel of a liquid crystal television device incorporating a liquid crystal panel for displaying television images from inside the device.
（発明の概要）
本発明は液晶テレビ装置の照明構造において、液晶パネ
ルの背面に曲げられた螢光管を設置する事により、照明
のエネルギー効率を向上させるものである。(Summary of the Invention) The present invention improves the energy efficiency of lighting in a lighting structure of a liquid crystal television set by installing a curved fluorescent tube on the back side of a liquid crystal panel.
従来は隔遇刊誌「日経エレクトニクス」１９８４年９月
１０号２２６ページに記載され、第２図に示すような照
明構造であった。Conventionally, the lighting structure was as shown in FIG. 2, as described in the independent magazine "Nikkei Electronics", September 10, 1984, page 226.
第２図において、２１は液晶バフル、２２：よ外装箱体
、２３は円筒型直線状螢光管、２４はＧ明アクリルより
なる導光板、２５はカバーガラスを示す、第２図より明
らかなように、液晶パネルの画像面前面を明るくする為
に、標的に円筒型螢光管２３を発光させ、これより発散
する光線を光学素子たる導光板２４によって分散させて
いる。In Fig. 2, 21 is a liquid crystal baffle, 22 is an exterior box, 23 is a cylindrical linear fluorescent tube, 24 is a light guide plate made of G-light acrylic, and 25 is a cover glass. In order to brighten the front surface of the image plane of the liquid crystal panel, a cylindrical fluorescent tube 23 is made to emit light at a target, and the light beams diverging from the tube are dispersed by a light guide plate 24, which is an optical element.
〔発明が解決しようとする間ＬＩ〜及び目的〕本来、液
晶パネルを用いた装置は１．夜晶パネルの駆動電力が小
さいということが最大の特徴の一つと言える。しかし、
液晶カラーテレビ装置の場合パネルガラスにカラーフィ
ルタをｔＭ 叙し、ｌ伎晶パネルに透過型液晶パネルを
用いる事から、液晶パネルの背面に照明装置が必要であ
った。そしてこの照明装置の駆動電力は液晶テレビ装置
全体の消費電力に対し、決して低くはない値であった。[Limit and purpose to be solved by the invention] Originally, a device using a liquid crystal panel had 1. One of the biggest features is that the driving power of the night crystal panel is low. but,
In the case of a liquid crystal color television set, a color filter is provided on the panel glass and a transmissive liquid crystal panel is used as the crystal panel, so an illumination device is required on the back side of the liquid crystal panel. The driving power of this lighting device was by no means low compared to the power consumption of the entire liquid crystal television device.
前述する照明装置の消費電力を低減せしめる為従来は第
２図に示すような円筒型直線状螢光管が用いられてきた
。しかし、照明装置全体の消費電力の低下、すなわちエ
ネルギー効率の向上は、円筒型直線状螢光管のみならず
光学系たく導光板の導光効率も向上させなければならな
い。In order to reduce the power consumption of the above-mentioned lighting device, a cylindrical linear fluorescent tube as shown in FIG. 2 has conventionally been used. However, in order to reduce the power consumption of the entire lighting device, that is, to improve the energy efficiency, it is necessary to improve not only the cylindrical linear fluorescent tube but also the light guide efficiency of the optical system and the light guide plate.
第２図に示す従来の液晶テレビ装置の照明構造では、円
筒型直線螢光管２３より発した光は例えば図中２６のよ
うな光路を経て、液晶パネル２工の背面へまんべんなく
光を照射するしくみになっている。しかし、光は光路２
６を経る間に図中２７゜２８．２９等で示す導光板２４
の界面でフレネルの法則による界面反射を必ず起こり必
ず光量の損失が起こる。これは界面に対する入射角度が
深くなれば深くなるほど多い。In the lighting structure of the conventional LCD television set shown in FIG. 2, the light emitted from the cylindrical linear fluorescent tube 23 passes through an optical path like 26 in the figure, and evenly irradiates the back surface of the LCD panel 2. It's structured. However, the light path 2
6, the light guide plate 24 shown at 27°28.29 etc. in the figure
Interfacial reflection according to Fresnel's law always occurs at the interface, and there is always a loss of light quantity. This increases as the angle of incidence with respect to the interface becomes deeper.
さらに、第２図に示す従来の液晶テレビ装置の照明構造
では、発光源である円筒型直線状螢光管が液晶パネルの
一辺にかたよっており、図中３０で示される円筒型直線
螢光管２３より離れた部位では、これに到達する光の光
路が長くなり、その分光量の損失は大きくなる。Furthermore, in the lighting structure of the conventional LCD television set shown in FIG. 2, the cylindrical linear fluorescent tube serving as the light emitting source is concentrated on one side of the liquid crystal panel. At a site farther away than 23, the optical path of the light that reaches it becomes longer, and the loss of the spectral amount increases.
さらに、第２図に示す従来の液晶テレビ装置の照明構造
では、発光源である円筒型直線状螢光管２３の主に半面
、すなわち図中３１で示される方向の面より発光した光
は比較的有効に液晶パネル２１を照明されるのに使用さ
れるが、他の半面すなわち図中３２で示される面より発
光した光はほとんど有効には活用されない。この部位３
２の近傍に反射境を設けても大差ない。Furthermore, in the illumination structure of the conventional liquid crystal television set shown in FIG. However, the light emitted from the other half, that is, the surface indicated by 32 in the figure, is hardly utilized effectively. This part 3
Even if a reflective boundary is provided near point 2, there is no big difference.
さらに、第２図に示す従来の液晶テレビ装置の照明構造
では、液晶パネルのマトリックス状画素と導光板２４の
背面にあるストライプ状フレネル部３３とのモアレをな
くする為、導光板２４と液晶パネル２１の間に、拡散板
３４が必要であり、この拡散板３４によっても光の透過
率が減少するが故に、光量の損失が少なからずあった。Furthermore, in the lighting structure of the conventional liquid crystal television set shown in FIG. Between 21 and 21, a diffuser plate 34 is required, and since this diffuser plate 34 also reduces the transmittance of light, there is a considerable loss in the amount of light.
さらに、第２図に示す従来の液晶テレビ装置の照明構造
では、透明アクリルを形成してなる導光板２４の部品コ
ストが極めて高い、その他に拡散板３４１反射板３５．
３６等部品点数が多い等の理由で コイ明構造全体のコ
ストが高いものであった。Furthermore, in the conventional lighting structure of the liquid crystal television set shown in FIG. 2, the parts cost of the light guide plate 24 made of transparent acrylic is extremely high, and in addition, the parts cost of the light guide plate 24, which is made of transparent acrylic, is extremely high.
The overall cost of the Koi Ming structure was high due to the large number of 36-grade parts.
そこで、本発明は従来のこのような欠点を解決するため
、照明構造全体の光量に関するエネルギー効率を向上し
、照明構造のコストを低減することを目的とする。SUMMARY OF THE INVENTION In order to solve these conventional drawbacks, it is an object of the present invention to improve the energy efficiency regarding the amount of light of the entire lighting structure and to reduce the cost of the lighting structure.
本発明の液晶テレビ装置の照明構造は、テレビ画像を表
示する液晶テレビ装置において、上記液晶パネルの背面
に、Ｕ字状、Ｓ字状２Ｍ字状等の上記液晶パネル面と平
行な平面内に曲げられた螢光管を設置した事を特徴とす
る。The lighting structure of the liquid crystal television device of the present invention is such that, in the liquid crystal television device that displays television images, a U-shaped, S-shaped, 2M-shaped, etc. shape is provided on the back side of the liquid crystal panel in a plane parallel to the surface of the liquid crystal panel. It is characterized by the installation of a bent fluorescent tube.
以下に本発明の実施例を図面を用いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図（ａｌは本発明による実施例の平面通視図を示す
。また第１図（ｂｌは第１図（ａｌの横断面図を示す。FIG. 1 (al shows a plane perspective view of an embodiment according to the present invention. FIG. 1 (bl shows a cross-sectional view of FIG. 1 (al).
第１図ｔａ＋および（ｂｌにおいて、■は液晶バフル。In Fig. 1 ta+ and (bl), ■ is a liquid crystal baffle.
２は外装箱体、３はＵ字状螢光管、４は反射板。2 is an exterior box, 3 is a U-shaped fluorescent tube, and 4 is a reflector.
５は拡散板、６はカバーガラスを示す。5 is a diffuser plate, and 6 is a cover glass.
第１図ｆａ）および（ｂｌより明らかなように、本発明
による液晶テレビ装置の照明構造は、Ｕ字状の螢光管が
画面の直下に、しかも螢光管各部位が液晶パネル面内に
バランスよく均等に配分されるように設置されている。As is clear from Figure 1fa) and (bl), the lighting structure of the liquid crystal television set according to the present invention has a U-shaped fluorescent tube directly below the screen, and each part of the fluorescent tube is within the plane of the liquid crystal panel. They are placed in a well-balanced and evenly distributed manner.
まず、本発明による液晶テレビ装置の照明構造は、第１
図より明らかなように、発光源たるＵ字状螢光管より出
た光は例えば光路７を経て液晶パネルへまんべんなく照
光されるが、光路の途中で界面反射される回数が少なく
、あらぬ方向へ光が反射していき損失する機会が極めて
少ない。First, the lighting structure of the liquid crystal television device according to the present invention is as follows.
As is clear from the figure, the light emitted from the U-shaped fluorescent tube, which is the light source, passes through optical path 7 and illuminates the liquid crystal panel evenly, but the number of times it is reflected at the interface in the middle of the optical path is small, and it is reflected in the wrong direction. There is very little chance that light will be lost due to reflection.
さらに本発明による液晶テレビ装置の照明構造は、螢光
管の発光各部位が、液晶パヱル面直下にバランス良く均
等に配置されている為、発光源から液晶パネルに至る光
路の長さが短く、光路長による光量の損失が極めて少な
い。Furthermore, in the lighting structure of the liquid crystal television set according to the present invention, the light emitting parts of the fluorescent tube are arranged evenly and in a well-balanced manner just below the surface of the liquid crystal panel, so the length of the optical path from the light emitting source to the liquid crystal panel is short. Loss of light amount due to optical path length is extremely small.
さらに本発明による液晶テレビ装置の照明構造は第１Ｉ
２Ｉより明らかなように、螢光管の断面各方向から発し
た光がもれな（活用される為、光量の損失が掴めて少な
いものであった。Furthermore, the lighting structure of the liquid crystal television device according to the present invention is as follows.
As is clear from 2I, since the light emitted from each direction of the cross section of the fluorescent tube was utilized, the loss in the amount of light was easily grasped and was small.
さらに本発明による液晶テレビ装置の照明構造は、成形
コスト等部品コストの高い部品を必要とせず、部品点数
も少ない為、照明構造全体のコストが低減されるもので
あった。Further, the lighting structure of the liquid crystal television device according to the present invention does not require high-cost parts such as molding costs, and has a small number of parts, so that the cost of the entire lighting structure is reduced.
第３図はＳ字状螢光管を用いた本発明による液晶テレビ
装置の平面透視図を示すものであるが、効果は第１図に
示すものと全く同じである。FIG. 3 shows a plan perspective view of a liquid crystal television set according to the present invention using an S-shaped fluorescent tube, and the effect is exactly the same as that shown in FIG. 1.
また、本発明による液晶テレビ装置の照明構造は、発光
源から液晶パネルへの光路長の関係、あるいは、照明構
造の総体寸法特に厚み寸法の関係から液晶パネルの画面
積が太き（なれば大きくなるほど有効である。Furthermore, in the lighting structure of the LCD television device according to the present invention, the screen area of the liquid crystal panel is large (the larger the screen area is I see, it is effective.
本発明は以上説明したように、液晶パネルの背面に、Ｕ
字状、Ｓ字状等の曲げられた螢光管を設置する事により
、入力電力に対する液晶パネル照射光量の効率を向上さ
せ、照明構造のコストを低減させる効果がある。As explained above, the present invention has a U
By installing a curved fluorescent tube in a shape such as a shape of a letter S, the efficiency of the amount of light irradiated on the liquid crystal panel relative to the input power is improved, and the cost of the lighting structure is reduced.
第１図（ａｌは本発明による液晶テレビ装置の昭明措明
構造の断面図。
第２図は従来の液晶テレビ装置の照明構造の断面図であ
る。
第３図は本発明による液晶テレビ装置の照明ｔａ造の他
の実施例の平面通視図である。
１．２１・・・液晶パネル
２．２２・・・外装箱体
３ ・・・Ｕ字型螢光管
４ ・・・反射板
５．３４・・・拡散板
６．２５・・・カバーガラス
７．２６・・・光路
２３ ・・・円筒型直線状螢光管
２４ ・・・導光板
２７．２８．２９・・・導光板の界面
３０ ・・・液晶パネルの一部位
３１．３２・・・円筒型直線状螢光管の断面の半面３３
・・・導光板のストライブ状フレネル部３５．３
６・・・反射板
８ ・・・Ｓ字型螢光管
以 上
第１図（ｂ）FIG. 1 (al is a cross-sectional view of the Showming structure of a liquid crystal television device according to the present invention. FIG. 2 is a cross-sectional view of the illumination structure of a conventional liquid crystal television device. FIG. 3 is a cross-sectional view of the lighting structure of a liquid crystal television device according to the present invention. 1.21...Liquid crystal panel 2.22...Exterior box body 3...U-shaped fluorescent tube 4...Reflector plate 5 .34...Diffusion plate 6.25...Cover glass 7.26...Optical path 23...Cylindrical linear fluorescent tube 24...Light guide plate 27.28.29...Light guide plate Interface 30...One part of the liquid crystal panel 31.32...Half surface 33 of the cross section of the cylindrical linear fluorescent tube
... Striped Fresnel portion 35.3 of light guide plate
6...Reflector plate 8...S-shaped fluorescent tube and above Figure 1(b)
Claims (1)
装置において、上記液晶パネルの背面にＵ字状、Ｓ字状
、Ｍ字状等の、上記液晶パネル面と平行な平面内に曲げ
られた螢光管を設置した事を特徴とする液晶テレビ装置
の照明構造。In a liquid crystal television device incorporating a liquid crystal panel for displaying television images, a fluorescent light curved in a plane parallel to the surface of the liquid crystal panel, such as a U-shape, S-shape, or M-shape, is provided on the back of the liquid crystal panel. A lighting structure for a liquid crystal television device characterized by installing a tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60243316A JPS62102226A (en) | 1985-10-30 | 1985-10-30 | Illuminating structure for liquid crystal television device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60243316A JPS62102226A (en) | 1985-10-30 | 1985-10-30 | Illuminating structure for liquid crystal television device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62102226A true JPS62102226A (en) | 1987-05-12 |
Family
ID=17102021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60243316A Pending JPS62102226A (en) | 1985-10-30 | 1985-10-30 | Illuminating structure for liquid crystal television device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62102226A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2618934A1 (en) * | 1987-07-31 | 1989-02-03 | Japan Aviation Electron | REAR LIGHT SOURCE LIGHTING DEVICE FOR THE LIQUID CRYSTAL DISPLAY ELEMENT OF AN INSTRUMENT, SUCH AS A COUNTER |
| JPH02272485A (en) * | 1989-04-14 | 1990-11-07 | Hitachi Ltd | Plane light source device |
| US5128781A (en) * | 1989-09-21 | 1992-07-07 | Nippon Steel Corporation | Transmissive liquid display apparatus having a thin construction without diminished brightness |
| EP0607453A1 (en) * | 1992-07-13 | 1994-07-27 | Seiko Epson Corporation | Surface illumination device and liquid crystal display |
| US5931555A (en) * | 1989-05-18 | 1999-08-03 | Seiko Epson Corporation | Background lighting apparatus for liquid crystal display |
| US7651233B2 (en) | 2004-01-08 | 2010-01-26 | Sharp Kabushiki Kaisha | Lighting device for display devices, liquid crystal display device, and light source lamp |
-
1985
- 1985-10-30 JP JP60243316A patent/JPS62102226A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2618934A1 (en) * | 1987-07-31 | 1989-02-03 | Japan Aviation Electron | REAR LIGHT SOURCE LIGHTING DEVICE FOR THE LIQUID CRYSTAL DISPLAY ELEMENT OF AN INSTRUMENT, SUCH AS A COUNTER |
| JPH02272485A (en) * | 1989-04-14 | 1990-11-07 | Hitachi Ltd | Plane light source device |
| US5931555A (en) * | 1989-05-18 | 1999-08-03 | Seiko Epson Corporation | Background lighting apparatus for liquid crystal display |
| US5128781A (en) * | 1989-09-21 | 1992-07-07 | Nippon Steel Corporation | Transmissive liquid display apparatus having a thin construction without diminished brightness |
| EP0607453A1 (en) * | 1992-07-13 | 1994-07-27 | Seiko Epson Corporation | Surface illumination device and liquid crystal display |
| EP0607453A4 (en) * | 1992-07-13 | 1995-04-12 | Seiko Epson Corp | Surface illumination device and liquid crystal display. |
| US5619351A (en) * | 1992-07-13 | 1997-04-08 | Seiko Epson Corporation | Surface-type illumination device and liquid crystal display |
| US5949505A (en) * | 1992-07-13 | 1999-09-07 | Seiko Epson Corporation | Surface-type illumination device and liquid crystal display |
| US6108060A (en) * | 1992-07-13 | 2000-08-22 | Seiko Epson Corporation | Surface-type illumination device and liquid crystal display |
| US7651233B2 (en) | 2004-01-08 | 2010-01-26 | Sharp Kabushiki Kaisha | Lighting device for display devices, liquid crystal display device, and light source lamp |
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