JPS5823016A - Liquid-crystal light valve - Google Patents
Liquid-crystal light valveInfo
- Publication number
- JPS5823016A JPS5823016A JP12201381A JP12201381A JPS5823016A JP S5823016 A JPS5823016 A JP S5823016A JP 12201381 A JP12201381 A JP 12201381A JP 12201381 A JP12201381 A JP 12201381A JP S5823016 A JPS5823016 A JP S5823016A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- electrodes
- electric field
- liquid
- light valve
- 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.)
- Granted
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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- 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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
Abstract
Description
【発明の詳細な説明】
本発明はツイストネマチックモードの液晶ライトバルブ
に関する、本発明の目的は、高速で応答し、安価な液晶
ライトバルブを提供する事である０近来、ＣＰ■、メモ
リ等の低価格化が、半導体技術の進歩によって進み、マ
イコン、オフィスコンピー−ターを使用する層及びコン
ピー−ターのプリントアウトに接する層が、従来のＥＤ
ＰＳの特殊な専門家のみから、広く一般大衆にまで拡大
して来つつある。云いかえれば、通常の書類と同一レベ
ルでの出力処理、即ち漢字片名交シ文による出力を待望
する気運が非常に高まってきている０その典型的な例を
一つあげれば日本語ワードプロセッサであろう。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a twisted nematic mode liquid crystal light valve.An object of the present invention is to provide a liquid crystal light valve that responds at high speed and is inexpensive. As prices continue to fall due to advances in semiconductor technology, the layer that uses microcomputers, office computers, and the layer that comes in contact with computer printouts is replacing conventional EDs.
It is beginning to expand from being limited to specialized PS specialists to the general public. In other words, there is a growing desire for output processing at the same level as ordinary documents, that is, output using kanji and katana koji.One typical example is Japanese word processors. Probably.
ところがこのようなシステムは、前述した如く回路、メ
モリーはどんどん低価格化が進行しておシ、今後も期待
できるのに対して、その出力端末であるプリンターにつ
いては、漢字等の使用を前提とすると、５２Ｘ３２ドツ
ト程度の分解能を必要とされる為、必然的に高分解能で
、しかも高分解能化による印字スピードの低下に対処し
得る高速度の４ので表いと能力的に不十分であｐ１必然
的にコストの上昇を招いてしまっている。However, as mentioned above, circuits and memory are becoming cheaper and cheaper, and while this type of system can be expected to continue in the future, the output terminal, the printer, is based on the premise of using kanji, etc. Then, since a resolution of about 52 x 32 dots is required, it is necessary to use p1, which is necessarily high resolution and has a high speed that can cope with the decrease in printing speed due to high resolution. This has led to an increase in costs.
例えば現在この要求を満足し得るもの杜、レーｆ−１Ｏ
ＦＴを使用した光プリンター、マルチスタイ２ス静電プ
リンターしか存在しないが、双方共非常に高価であって
、システムコストを押ｍ上げる最大の要因となっている
。これが上記のような種々のシステムの市場への普及を
、（市場のニーズがあるにもかかわらず）大きく妨げる
原因となっている。For example, the one that can currently meet this requirement is the F-1O
There are only optical printers using FT and multi-style 2-style electrostatic printers, but both are extremely expensive and are the biggest factor driving up system costs. This has greatly hindered the spread of the various systems described above into the market (despite the market needs).
上記の事情は、高速ファクシミリ、Ｃ′ｆＬＴハードコ
ピア、各種ターミナル等でも基本的には全く同じ事が云
えるものである。The above situation is basically the same for high-speed facsimiles, C'fLT hard copiers, various terminals, etc.
かかる状況を克ふくする可能性を持つ技術の一つに液晶
ライトパルプがある。液晶ライトバルブを印写装置に用
いた場合、どのような利点があるかを以下説明する。One technology that has the potential to overcome this situation is liquid crystal light pulp. The advantages of using a liquid crystal light valve in a printing device will be explained below.
第１．２図に液晶ライトパルプを用いた印写装置の概要
を示す。Figure 1.2 shows an outline of a printing device using liquid crystal light pulp.
光源１は常圧点灯しておシ、液晶ライトバルブアレイ２
を常に照らしている。液晶２イトバルブアレイ２は微小
２イトバルブ８を複数個有していて、液晶駆動回路９に
よって独立に光学的に開閉され、光源１からの光を透過
させたル、させなかったシする。このようにして得られ
た光信号が感光部３へ到達する訳であるが、感光材料よ
シなる感光部３は、帯電ステージ田ン６であらかじめ帯
電されているために、光信号が到達した部分では帯電電
荷が消滅する。したがって外部からの書込信号に応じた
靜電潜偉が形成されることになる。Light source 1 is lit at normal pressure, LCD light valve array 2
is always shining. The liquid crystal two-item valve array 2 has a plurality of minute two-item valves 8, which are optically opened and closed independently by a liquid crystal drive circuit 9 to allow or prevent light from the light source 1 from passing through. The optical signal obtained in this way reaches the photosensitive section 3, but since the photosensitive section 3, which is made of a photosensitive material, has been charged in advance at the charging stage 6, the optical signal does not reach the photosensitive section 3. The electric charge disappears in the part. Therefore, a static signal is formed in response to a write signal from the outside.
このようにして形成された靜電潜偉は、現儂部４で着色
トナー現儂後、転写部５で記録材料、例えば紙等にトナ
ー像が転写され、定着部７で熱等で定着され、完全に固
定化された印刷儂が出来上がる。The electromagnetic image formed in this way is coated with colored toner in the printing section 4, the toner image is transferred to a recording material such as paper in the transfer section 5, and fixed by heat or the like in the fixing section 7. A completely fixed printing force is created.
上述の如く、液晶ライトパルプを用いた印刷装置の場合
、例えばレーザープリンターの場合必要な、精密高速光
学走査系が不要となる。このため構造の簡素化、そして
何よシも低価格化が期待できる。As mentioned above, in the case of a printing device using liquid crystal light pulp, there is no need for a precise high-speed optical scanning system, which is required in the case of, for example, a laser printer. For this reason, it is expected that the structure will be simplified and above all, the price will be lowered.
このように液晶ライトパルプは、低価格の印写装置の実
用化にとって重要表技術であるが、従来の液晶ライトパ
ルプには致命的な問題があった。As described above, liquid crystal light pulp is an important technology for the practical application of low-cost printing devices, but conventional liquid crystal light pulp has a fatal problem.
その問題とは応答速度が決定的に遅いことであったＯ
例えば前述の各種システムに適用し得る印字部の性能と
しては、Ａ４版１枚を毎分１０枚程度出力する程度の印
写速度と、１ミリメートル当１１゜ドツト程度の分解能
を必要とするが、これは云いかえると、１秒当シ約５０
ｏラインの印写速度、即ち１ライン書き込みに要する時
間が２ミリ秒以下であるという事である。ところが従来
の液晶ライトパルプ、即ちＴＮＷの液晶を用いたライト
パルプではこのような高速の動作は不可能であった。The problem was that the response speed was definitely slow. , a resolution of approximately 11° dots per millimeter is required, which means approximately 50 dots per second.
This means that the o-line printing speed, that is, the time required to write one line, is 2 milliseconds or less. However, such high-speed operation is not possible with conventional liquid crystal light pulp, ie, light pulp using TNW liquid crystal.
何故従来の液晶ライトパルプの応答速度が遅いかを以下
説明したい。I would like to explain why the response speed of conventional liquid crystal light pulp is slow.
第３図に従来の液晶ライトパルプの断面図を示した。１
対の透明基板１０の間にツイスト構造のネマチック液晶
層１１があ夛、それらは偏光板１２で上下からはさまれ
ている。基板１０の液晶層と対向する表面の一部に透明
電極１３，１４があシ、ここに電界を印加したυ、しな
かったシする事により、電極部分は光を透過したシしな
かったシする。すなわちライトバルブとなる。これがＴ
Ｎ型のライトパルプの基本構造である。FIG. 3 shows a cross-sectional view of a conventional liquid crystal light pulp. 1
A twisted nematic liquid crystal layer 11 is placed between a pair of transparent substrates 10, which are sandwiched between upper and lower polarizing plates 12. Transparent electrodes 13 and 14 are formed on a part of the surface of the substrate 10 facing the liquid crystal layer, and by applying an electric field here and not applying an electric field, the electrode part transmits light. do. In other words, it becomes a light valve. This is T
This is the basic structure of N-type light pulp.
令弟３図において液晶層が電界無印加状態すなわちオフ
状態から電界印加状態すなわちオン状態へ変化する時の
応答速度を’ｌ’ｒｉｓｅｓ逆にオン状態からオフ状態
へ変化する時の応答速度をＴｄｅｃａｙとすると、Ｔｒ
ｉｓｅ ＸＴｄｅｅａｙはそれぞれ次のように表わされ
る。In Figure 3, the response speed when the liquid crystal layer changes from the no-field applied state, that is, the off state, to the electric field applied state, that is, the on state, is 'l'rises.Conversely, the response speed when the liquid crystal layer changes from the on state to the off state is Tdecay. Then, Tr
ise XT deeay are respectively expressed as follows.
’ｌ’ｒｉａｅ ｐ ｄ”／ Ｖ
Ｔｄｅｃａｙ ｐ ｄ”
ここでｐは液晶の粘度で、ｄは液晶層の厚み、■は印加
電圧である。これによＪ’ｌ’ｒｉｓｅは印加電圧を高
くする事によシ、速くする事ができるか、Ｔｄｅｅａｙ
は液晶の粘度と厚みのみに依存しておシ、何らかの手段
により外部から応答速度を速くする事ができない。との
ような構成の従来のＴＮｍのライトパルプで得られてい
る最も速いＴｄ＠ｃａｙでも数ミリ秒程度の値になって
しまい、実用上は遅すぎて使用できなかった。'l'riae p d''/V Tdecay p d'' where p is the viscosity of the liquid crystal, d is the thickness of the liquid crystal layer, and ■ is the applied voltage. Is it possible to make J'l'rise faster by increasing the applied voltage?Tdeeay
depends only on the viscosity and thickness of the liquid crystal, and the response speed cannot be increased externally by any means. Even the fastest Td@cay obtained with the conventional light pulp of TNm having the structure as shown in FIG.
本発明はこのような従来の液晶ライトパルプの欠点を解
決したものである。本発明による液晶ライトパルプの断
面図を１８４図に、正面図を第５図に示した。The present invention solves the drawbacks of the conventional liquid crystal light pulp. A cross-sectional view of the liquid crystal light pulp according to the present invention is shown in FIG. 184, and a front view is shown in FIG.
第４図において１対の基板１００間に液晶層１１があり
それらを偏光板１２で上下からはさんでいる。基板１ｏ
の液晶層と対向する表面の一部にライトバルブとなる電
極１３．１４がある。ここまでは従来のものと変わらな
いが、本発明に幹いては蔦電極１５．１４の両サイドに
電極１５，１６゜１７．１８が設けられている。第４図
は断面図であるが、第５図は同じものの正面図である。In FIG. 4, a liquid crystal layer 11 is located between a pair of substrates 100, which are sandwiched between upper and lower sides by polarizing plates 12. Board 1o
There are electrodes 13 and 14 serving as a light valve on a part of the surface facing the liquid crystal layer. Up to this point, there is no difference from the conventional one, but the core of the present invention is that electrodes 15, 16° and 17.18 are provided on both sides of the vine electrodes 15 and 14. FIG. 4 is a sectional view, while FIG. 5 is a front view of the same.
第５図においては電極のみが示されている。In FIG. 5 only the electrodes are shown.
今イオン状態の時は、ライトバルブを構成する電極１５
．１４の間に電界を印加する。この時電界は第６図に示
したように液晶層に垂直方向にかかることになる。この
時Ｔｒｉｓｅは従来どうシＴｒｉｔｅ ｐｄ”／Ｖ
となる。従って印加電圧Ｖを高くすればＴｒｉＩｅを十
分短くする事ができる。When it is in the ionic state, the electrode 15 that constitutes the light valve
．． An electric field is applied between 14 and 14. At this time, an electric field is applied to the liquid crystal layer in the vertical direction as shown in FIG. At this time, Trise is conventionally Trite pd''/V. Therefore, by increasing the applied voltage V, TriIe can be made sufficiently short.
オフ状態の時には、従来は電極１３．１４間を電界無印
加状態にするだけであった。しかし本発明においては、
それに加えてサイド電極１５．１６と１７．１８の間に
電界を印加する。その結果第７図に示したように液晶層
に水平水内に電界がかかることになる。この電界により
液晶分子にオフ状態にならせる力が働く０従ってこの水
平方向の電界 高くする事により’ｌ’ｄｅｃａ７も短
くする事ができる。In the off-state, conventionally only an electric field is not applied between the electrodes 13 and 14. However, in the present invention,
In addition, an electric field is applied between side electrodes 15.16 and 17.18. As a result, an electric field is applied to the liquid crystal layer in horizontal water as shown in FIG. This electric field exerts a force that causes the liquid crystal molecules to turn off. Therefore, by increasing this horizontal electric field, 'l' deca7 can also be shortened.
このように本発明においては従来短くする事ができなか
ったＴｄｅｃａｙをサイド電極間に電界印加する事によ
シ短くする事が可能となった０以下実施例を示す０
第８図に正面図を示したよりなライレ（ルブでライトバ
ルブ部分の巾ＷＩが５０ミクロン、長さＷｓか５０ミク
ロン、サイド電ｉとの間隔ｄが１０ミクロンサイド電極
の巾Ｗ富が１０ミクロン、サイド電極の重なり部分の長
さＷ４ミクロンのものを試作した。液晶層の厚さは約４
ミクロンであった。この液晶ライトバルブに、オン状態
の時には上下の電極１！５．１４の間に１５ボルトの電
圧を印加した。又オフ状態の時には上下の電極１５．１
４の間の電圧をゼロとし、サイド電極１５．１６と１７
１８の間に１５ボルトの電圧を印加した。この時の応答
速度はＴｒ ｉ ＠ｅが１５ミリ秒で、’ｌ’ｄｅｃａ
ｙは［１６ミリ秒であった０測定温度は３０υである。In this way, in the present invention, Tdecay, which could not be shortened in the past, can be shortened by applying an electric field between the side electrodes. An example below 0 is shown in Fig. 8, which is a front view. The width WI of the light bulb part is 50 microns, the length Ws is 50 microns, the distance d from the side electrode i is 10 microns, the width W of the side electrode is 10 microns, and the width of the side electrode is 10 microns. I made a prototype with a length W4 microns.The thickness of the liquid crystal layer is about 4 microns.
It was a micron. When this liquid crystal light valve was in the on state, a voltage of 15 volts was applied between the upper and lower electrodes 1!5.14. Also, in the off state, the upper and lower electrodes 15.1
The voltage between 4 and 15 is zero, and the side electrodes 15, 16 and 17
A voltage of 15 volts was applied during 18 hours. At this time, the response speed is 15 milliseconds for Tri @e, and 'l'deca
y was [16 msec 0 measured temperature is 30 υ.
なお従来の方法と同様にオフ状態の時、サイド電極間に
電圧を印加しないとＴｄｅｃａｙは４ミリ秒であった。Note that Tdecay was 4 milliseconds when no voltage was applied between the side electrodes in the off state as in the conventional method.
これにより本発明の方法では応答速度が大巾に改善され
ている事がわかる０なお上記ライトバルブは酸化インジ
ウム透明導電膜をフォトエツチング法で、パターニング
する事により、容易に作成する事ができた。本実施例に
よる上記応答速度は前記した液晶ライトバルブアレイな
用いた印写装置にも使える速さである。又印加電圧をさ
らに高くすればもっと速い応答速度を得る事が可能であ
る○
このように本発明は従来不可能であったＴＮ型液晶ライ
トバルブの立ち下）の応答速度Ｔｄｅｃａｙを速くする
事が可能であシ、高速で安価表ライトパルプとして印写
装置をはじめとする各種装置への応用が期待される。This shows that the response speed is greatly improved by the method of the present invention.The above light valve can be easily fabricated by patterning an indium oxide transparent conductive film using a photoetching method. . The above response speed according to this embodiment is a speed that can also be used in a printing apparatus using the above-mentioned liquid crystal light valve array. Furthermore, it is possible to obtain a faster response speed by increasing the applied voltage. In this way, the present invention can increase the response speed (Tdecay) of the falling edge of a TN type liquid crystal light valve, which was previously impossible. It is expected to be applied to various devices including printing devices as a possible, high-speed, and inexpensive surface light pulp.
第１図は液晶ライトノ（ルプを用いた印写装置の概要で
ある０
第２図は液晶ライトノくルブアレイである。
第３図は従来の液晶ライしくルプの断面図である０
第４図は本発明による液晶ライトノ（ルブの断面図であ
る。
第５図は本発明による液晶ライトノくルブの正面図であ
る。
第６図は本発明による液晶ライトノ（ルブのオン状態の
時の電界の状態を示したものである０第７図は本発明に
よる液晶ライトノ（ルブのオフ状態の時の電界の状態を
示したものである。
第８図は本発明による液晶ライトノ（ルプの１実施例の
正面図である０
１：光 源
２：液晶ライトバルブアレイ
５：感光部
４：現像部
５：転写部
６：帯電ステージ１ン
７：定着部
８：液晶ライトパルプ
９：液晶駆動回路
１０：基′板
１１：液晶層
１２：偏光板
１５、１４ニライトバルブを構成する電極１５、１６．
１７．１ｓ：サイド電極
以 上
出願人 株式会社諏訪精工蕎
代理人弁理士 最 上 務
第３図
１４図
１ユ
第６図
、／３
【
４
１Ｊ７図Figure 1 is an outline of a printing device using a liquid crystal light loop. Figure 2 is a liquid crystal light array. Figure 3 is a cross-sectional view of a conventional liquid crystal light loop. FIG. 5 is a front view of the liquid crystal light bulb according to the present invention. FIG. 6 shows the state of the electric field when the liquid crystal light bulb according to the present invention is in the on state. Figure 7 shows the state of the electric field when the liquid crystal light source according to the present invention is in the OFF state. Figure 8 shows an example of the liquid crystal light source according to the present invention. 1: Light source 2: Liquid crystal light valve array 5: Photosensitive section 4: Developing section 5: Transfer section 6: Charging stage 1-7: Fixing section 8: Liquid crystal light pulp 9: Liquid crystal drive circuit 10: Base ' plate 11: liquid crystal layer 12: polarizing plates 15, 14 electrodes 15, 16 constituting the nilight bulb.
17.1s: Side electrode and above Applicant: Suwa Seikoso Co., Ltd. Representative Patent Attorney Tsutomu Mogami Figure 3 Figure 14 Figure 1 U Figure 6, /3 Figure 4 1J7
Claims (1)
造のネマチック液晶層及び一対の偏光板よシ構成される
ツイストネマチックモードの液晶ライトバルブにおいて
、ライドパ゛ルブ部分を構成する。電極の両サイド部分
に１液晶層に水平方向に電界をかける電極を設けた事を
特徴とする液晶ライトバルブ。In a twisted nematic mode liquid crystal light valve, which is composed of at least a pair of substrates, a twisted nematic liquid crystal layer sandwiched between the substrates, and a pair of polarizing plates, a ride pile portion is configured. A liquid crystal light valve characterized by having electrodes on both sides of the electrodes that apply an electric field horizontally to one liquid crystal layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12201381A JPS5823016A (en) | 1981-08-04 | 1981-08-04 | Liquid-crystal light valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12201381A JPS5823016A (en) | 1981-08-04 | 1981-08-04 | Liquid-crystal light valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5823016A true JPS5823016A (en) | 1983-02-10 |
| JPH0222362B2 JPH0222362B2 (en) | 1990-05-18 |
Family
ID=14825407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12201381A Granted JPS5823016A (en) | 1981-08-04 | 1981-08-04 | Liquid-crystal light valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5823016A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58221827A (en) * | 1982-06-17 | 1983-12-23 | Kyocera Corp | Liquid crystal device |
| JPS599630A (en) * | 1982-07-08 | 1984-01-19 | Canon Inc | Liquid crystal-optical shutter |
| JPS60217336A (en) * | 1984-04-13 | 1985-10-30 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| US5084778A (en) * | 1989-12-26 | 1992-01-28 | General Electric Company | Electrode structure for removing field-induced disclination lines in a phase control type of liquid crystal device |
| US5136409A (en) * | 1987-09-29 | 1992-08-04 | Canon Kabushiki Kaisha | Liquid crystal device having at least two zones having different diffusion characteristics |
| US5786876A (en) * | 1994-03-17 | 1998-07-28 | Hitachi, Ltd. | Active matrix type liquid crystal display system |
| FR2767952A1 (en) * | 1997-09-04 | 1999-03-05 | Lg Electronics Inc | HYBRID SWITCHED LIQUID CRYSTAL DISPLAY |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5074446A (en) * | 1973-10-30 | 1975-06-19 | ||
| JPS5348542A (en) * | 1976-10-14 | 1978-05-02 | Sharp Corp | Guest host effect type liquid crystal display device |
| JPS55124118A (en) * | 1979-03-19 | 1980-09-25 | Toyobo Co Ltd | Liquid crystal display device |
| JPS5693568A (en) * | 1979-12-28 | 1981-07-29 | Seiko Epson Corp | Printing device |
-
1981
- 1981-08-04 JP JP12201381A patent/JPS5823016A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5074446A (en) * | 1973-10-30 | 1975-06-19 | ||
| JPS5348542A (en) * | 1976-10-14 | 1978-05-02 | Sharp Corp | Guest host effect type liquid crystal display device |
| JPS55124118A (en) * | 1979-03-19 | 1980-09-25 | Toyobo Co Ltd | Liquid crystal display device |
| JPS5693568A (en) * | 1979-12-28 | 1981-07-29 | Seiko Epson Corp | Printing device |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58221827A (en) * | 1982-06-17 | 1983-12-23 | Kyocera Corp | Liquid crystal device |
| JPH0414328B2 (en) * | 1982-06-17 | 1992-03-12 | Kyosera Kk | |
| JPS599630A (en) * | 1982-07-08 | 1984-01-19 | Canon Inc | Liquid crystal-optical shutter |
| JPS60217336A (en) * | 1984-04-13 | 1985-10-30 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| US5136409A (en) * | 1987-09-29 | 1992-08-04 | Canon Kabushiki Kaisha | Liquid crystal device having at least two zones having different diffusion characteristics |
| US5084778A (en) * | 1989-12-26 | 1992-01-28 | General Electric Company | Electrode structure for removing field-induced disclination lines in a phase control type of liquid crystal device |
| US5786876A (en) * | 1994-03-17 | 1998-07-28 | Hitachi, Ltd. | Active matrix type liquid crystal display system |
| US6040886A (en) * | 1994-03-17 | 2000-03-21 | Hitachi, Ltd. | Active matrix type LCD with two shield electrodes |
| KR100360355B1 (en) * | 1994-03-17 | 2003-01-15 | 가부시끼가이샤 히다치 세이사꾸쇼 | Active matrix type liquid crystal display system |
| US6980273B2 (en) | 1994-03-17 | 2005-12-27 | Hitachi, Ltd. | Active matrix type liquid crystal system |
| FR2767952A1 (en) * | 1997-09-04 | 1999-03-05 | Lg Electronics Inc | HYBRID SWITCHED LIQUID CRYSTAL DISPLAY |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0222362B2 (en) | 1990-05-18 |
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