JPS59159129A - Transmission type liquid crystal display device - Google Patents
Transmission type liquid crystal display deviceInfo
- Publication number
- JPS59159129A JPS59159129A JP58033457A JP3345783A JPS59159129A JP S59159129 A JPS59159129 A JP S59159129A JP 58033457 A JP58033457 A JP 58033457A JP 3345783 A JP3345783 A JP 3345783A JP S59159129 A JPS59159129 A JP S59159129A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display device
- crystal display
- crystal plate
- light source
- 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
-
- 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
-
- 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
- G02F1/133605—Direct backlight including specially adapted reflectors
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】
２この発明は透過形液晶表示装置の照明装置、特にその
光源に関するものである。DETAILED DESCRIPTION OF THE INVENTION 2. The present invention relates to a lighting device for a transmissive liquid crystal display device, and particularly to a light source thereof.
一般に透過形液晶表示装置では、液晶が自発光素子では
ないため背面に光源を必要とする。また液晶表示板の画
像表示面積は液晶表示板の製造上の制限により小面積で
あり１表示する画像も数字や簡略化された図形が多かっ
た。このような従来の液晶表示装置の光源には小形白熱
電球や、小形白熱電球と導光体を組み合せたものが多く
使用されていた。In general, a transmissive liquid crystal display device requires a light source on the back side because the liquid crystal is not a self-luminous element. Further, the image display area of the liquid crystal display board is small due to manufacturing limitations of the liquid crystal display board, and many of the images displayed are numbers or simplified figures. The light source of such conventional liquid crystal display devices is often a small incandescent light bulb or a combination of a small incandescent light bulb and a light guide.
従来のこの種の装置を第１図、第２図により説明する。A conventional device of this type will be explained with reference to FIGS. 1 and 2.
第１図において、（１）は液晶板、（２）は光源である
小形白熱電球であり、電球の光（３）は液晶板（１）を
透過した後に観察者に到達する。この時、液晶板（１）
は電圧印加の有無により、光（３）を透過あるいは不透
過させ、観察者がそれを視認することによって、液晶板
（１）に表示された画像を認識する。In FIG. 1, (1) is a liquid crystal plate, (2) is a small incandescent light bulb as a light source, and light (3) from the bulb reaches the viewer after passing through the liquid crystal plate (1). At this time, the liquid crystal board (1)
The light (3) is transmitted or not transmitted depending on whether or not a voltage is applied, and the viewer recognizes the image displayed on the liquid crystal panel (1) by viewing the light (3).
また第２図は液晶板（１）の背面に導光体Ｉ４）を有し
。Further, in FIG. 2, a light guide I4) is provided on the back side of the liquid crystal plate (1).
導光体１４）の端部に設置された白熱電球（２）の光（
３）は導光体１４ｊを介した後、液晶板ζ１）を透過し
て観察者に到達する。この第１図、第２図のものは表示
°装置の用途や許容される大きさによって使い分けられ
ていた。The light (
3) passes through the light guide 14j, passes through the liquid crystal plate ζ1), and reaches the viewer. The devices shown in FIGS. 1 and 2 were used depending on the purpose and permissible size of the display device.
従来の湧過形液晶表示装置は以上のように構成されてい
るが２表示部面積が小さいために、低効率２発熱が犬な
どの短所をもつ小形白熱電球が使用されていても、余り
問題にはならなかった。Conventional outflow type liquid crystal display devices are constructed as described above, but since the display area is small, there is no problem even if a small incandescent bulb is used, which has the disadvantage of low efficiency and heat generation. It didn't happen.
しかし最近は液晶板を多数組み合せて表示部面積を大き
くした透過形液晶表示装置を構成することが多くなって
きた。この場合光源に小形白熱電球を使用すると７低効
率であるために多灯数を必要とし、消費電力が大幅に増
加したり、また発熱が大きいため２表示装置全体の機能
維持が困難であり、これを防ＬＬするためには大規模の
冷却装置が必要となるなど表示装置の性能−Ｆ２価格士
に不利な要因となっていた。。However, recently, it has become common to construct a transmission type liquid crystal display device in which a large number of liquid crystal plates are combined to increase the display area. In this case, if a small incandescent light bulb is used as a light source, it will require a large number of bulbs due to its low efficiency, resulting in a significant increase in power consumption, and it will be difficult to maintain the functionality of the entire display device as it generates a large amount of heat. In order to prevent this from LL, a large-scale cooling device is required, which is a disadvantageous factor for the performance of the display device. .
この発明は」二記のような大面積の表示部を有する透過
形液晶表示装置を構成する際に生じる従来のものの欠点
を除去するためになされたもので。This invention was made in order to eliminate the drawbacks of conventional devices that occur when constructing a transmissive liquid crystal display device having a large display area as described in 2.
高効率で発熱が少なく、かつガラス管の半周以上に反射
膜を形成した反射形の直管形螢光ランプを使用すること
により省電力型の大面積表示部をもつ透過形液晶表示装
置を提供することを目的とする。We provide a transmissive liquid crystal display device that is highly efficient, generates little heat, and has a large display area that saves power by using a reflective straight tube fluorescent lamp with a reflective film formed on more than half the circumference of the glass tube. The purpose is to
以下、この発明の一実施例を図について説明する。第３
図において、（１）は液晶板、（５）はこの液晶板（１
）を多数隣接配置して形成した表示部であり。An embodiment of the present invention will be described below with reference to the drawings. Third
In the figure, (1) is the liquid crystal plate, and (5) is this liquid crystal plate (1).
) are arranged adjacent to each other.
表示部（５）の背面には複数の螢光ランプ（６）を内蔵
した照明装置（７）が設置されている。螢光ランプ（６
）は第４図（ｈ）または（ｂ）（＝示すよう；ニガラス
管（８）の内周または外周の少なくとも半分以上に反射
膜（ｌαを設けた反射形蛍光ランプとしている。なおこ
の図で（９）は螢光膜である。勿論この螢光ランプ（６
）の透光部が表示部（５）と対向している。A lighting device (7) containing a plurality of fluorescent lamps (6) is installed on the back side of the display section (5). Fluorescent lamp (6
) is a reflective fluorescent lamp in which a reflective film (lα) is provided on at least half of the inner or outer circumference of the glass tube (8). (9) is a fluorescent film.Of course, this fluorescent lamp (6)
) faces the display section (5).
このように構成された液晶表示装置は２螢光ランプ（６
）が高効率であり、また棒状の拡散光源であるため、１
不のランプで複数の液晶板（１）に対応でき、少ない本
数で大面積の表示部（５）を照明できる。The liquid crystal display device constructed in this way has two fluorescent lamps (6
) is highly efficient and is a bar-shaped diffused light source, so 1
A plurality of liquid crystal panels (1) can be handled with a small number of lamps, and a large-area display section (5) can be illuminated with a small number of lamps.
従って、消費電力は少なくて済み、１本のランプ当りの
発熱も少な（・ため、照明装置（７）の冷却装置も簡単
なものでよ（・。Therefore, the power consumption is low, and the heat generated per lamp is also low (・Therefore, the cooling device for the lighting device (7) can be simple (・).
また、＠光ランプ（６）は拡散光源で発光面積が大きい
ため、白熱電球を使用するのに比べ低輝度となるが、カ
ラス管（８）の内周、または外周に反射膜（１０）を設
けた反射形とすることによって２反射膜＋ＩＱｌのない
透光部方向の輝度を増加させている。In addition, the @ light lamp (6) is a diffused light source and has a large light emitting area, so the brightness is lower than that using an incandescent light bulb, but a reflective film (10) is provided on the inner or outer circumference of the crow tube (8). By providing a reflective type, the brightness in the direction of the light-transmitting part without the 2 reflective films + IQl is increased.
以上のようにこの発明によれば光源に発熱が少なく２効
率の良い螢光ランプをさらに反射形として用いているた
め、大面積の表示部をもつ透過形液晶表示装置を構成し
た場合２高輝度の表示画面と大幅な省電力効果カζ得ら
れる。As described above, according to the present invention, since a fluorescent lamp with low heat generation and high efficiency is further used as a reflective type light source, when a transmissive liquid crystal display device having a large display area is configured, high brightness can be achieved. Display screen and significant power saving effect can be obtained.
第１図、第２図はそれぞれ別な従来の透過形液晶表示装
置の概略構造断面図、第３図はこの発明の一実施例を示
す透過形液晶表示装置の斜視図。
第４図（ａ）、 （ｂ）はこの発明に用いる螢光ランプ
のそれぞれ別な実施例を示す断面図である。
図中同一符号は同一または相当部分を示し、（１）・・
・液晶板、（５）・・表示部、（６）・・・螢光ランプ
、（７）・照明装置、（８）・・ガラス管、（９）・・
・螢光膜、 ｆＩＯ！・反射膜である。
代理人 葛 町 信 −
＊１ ｍ
亀 ｚ ＩＡ1 and 2 are schematic cross-sectional views of different conventional transmissive liquid crystal display devices, and FIG. 3 is a perspective view of a transmissive liquid crystal display device showing an embodiment of the present invention. FIGS. 4(a) and 4(b) are sectional views showing different embodiments of the fluorescent lamp used in the present invention. The same reference numerals in the figures indicate the same or corresponding parts, (1)...
・Liquid crystal plate, (5)...Display section, (6)...Fluorescent lamp, (7)・Lighting device, (8)...Glass tube, (9)...
・Fluorescent film, fIO!・It is a reflective film. Agent Makoto Kuzu - *1 m Kame z IA
Claims (1)
形液晶表示装置において、光源として液晶板と対向する
面の反対側に反射膜を形成した棒状の直管形螢光ランプ
を用（・たことを特徴とする透過形液晶表示装置。In a transmissive liquid crystal display device consisting of a liquid crystal plate and a light source provided on the back side of the liquid crystal plate, a rod-shaped straight tube fluorescent lamp with a reflective film formed on the opposite side of the surface facing the liquid crystal plate is used as the light source. (・A transmissive liquid crystal display device characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58033457A JPS59159129A (en) | 1983-03-01 | 1983-03-01 | Transmission type liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58033457A JPS59159129A (en) | 1983-03-01 | 1983-03-01 | Transmission type liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59159129A true JPS59159129A (en) | 1984-09-08 |
Family
ID=12387064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58033457A Pending JPS59159129A (en) | 1983-03-01 | 1983-03-01 | Transmission type liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59159129A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6171956U (en) * | 1984-10-17 | 1986-05-16 | ||
| JPS6171955U (en) * | 1984-10-17 | 1986-05-16 | ||
| JPS6171954U (en) * | 1984-10-17 | 1986-05-16 | ||
| JPS61109485U (en) * | 1984-12-24 | 1986-07-11 | ||
| EP0187998A2 (en) * | 1984-12-25 | 1986-07-23 | Mitsubishi Denki Kabushiki Kaisha | Display unit |
| 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 |
| US5726722A (en) * | 1993-01-19 | 1998-03-10 | Canon Kabushiki Kaisha | Light source for display device |
| WO2005030371A1 (en) * | 2003-09-23 | 2005-04-07 | Carrier Corporation | Reflective lamp to maximize light delivery to a photoactive catalyst |
-
1983
- 1983-03-01 JP JP58033457A patent/JPS59159129A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6171956U (en) * | 1984-10-17 | 1986-05-16 | ||
| JPS6171955U (en) * | 1984-10-17 | 1986-05-16 | ||
| JPS6171954U (en) * | 1984-10-17 | 1986-05-16 | ||
| JPH0452931Y2 (en) * | 1984-10-17 | 1992-12-11 | ||
| JPH0452930Y2 (en) * | 1984-10-17 | 1992-12-11 | ||
| JPH0452932Y2 (en) * | 1984-10-17 | 1992-12-11 | ||
| JPS61109485U (en) * | 1984-12-24 | 1986-07-11 | ||
| EP0187998A2 (en) * | 1984-12-25 | 1986-07-23 | Mitsubishi Denki Kabushiki Kaisha | Display unit |
| 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 |
| US5726722A (en) * | 1993-01-19 | 1998-03-10 | Canon Kabushiki Kaisha | Light source for display device |
| WO2005030371A1 (en) * | 2003-09-23 | 2005-04-07 | Carrier Corporation | Reflective lamp to maximize light delivery to a photoactive catalyst |
| US7279144B2 (en) | 2003-09-23 | 2007-10-09 | Carrier Corporation | Reflective lamp to maximize light delivery to a photoactive catalyst |
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