JPH01137232A - liquid crystal display element - Google Patents
liquid crystal display elementInfo
- Publication number
- JPH01137232A JPH01137232A JP62297929A JP29792987A JPH01137232A JP H01137232 A JPH01137232 A JP H01137232A JP 62297929 A JP62297929 A JP 62297929A JP 29792987 A JP29792987 A JP 29792987A JP H01137232 A JPH01137232 A JP H01137232A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display element
- crystal display
- type
- oriented film
- 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
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
- G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
- G02F1/13473—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells for wavelength filtering or for colour display without the use of colour mosaic filters
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
- G02F1/1396—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
- G02F1/1396—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
- G02F1/1397—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell the twist being substantially higher than 90°, e.g. STN-, SBE-, OMI-LC cells
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明はスーパーツィステッドネマチック型液晶表示素
子に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a super twisted nematic liquid crystal display element.
従来、主に用いられてきた液晶の表示モードは。 What is the display mode of liquid crystal that has been mainly used in the past?
ツィステッドネマチック（ＴＮ）型と呼ばれ、一対の上
下基板間で液晶分子が約９０°ねじれた構造をとってお
り、液晶による偏光面の回転と、電圧によるその効果の
消失を利用している。この表示モードは１時計や電卓等
の低時分割駆動では十分なものであったが、表示容忙を
増大させるために高時分駆動させると、コントラストが
低下したり、視角がせまくなるという欠点があった。こ
れは、高時分割駆動になると、選択点と非選択点にかか
る電圧の比が１に近づくためで、高コントラスト、広視
角の表示素子を得るためには、素子の相対透過率が５回
変化する電圧ｖ４゜と５０％変化する電圧Ｖ、。It is called a twisted nematic (TN) type, and has a structure in which the liquid crystal molecules are twisted approximately 90 degrees between a pair of upper and lower substrates, and utilizes the rotation of the plane of polarization by the liquid crystal and the disappearance of this effect by voltage. . This display mode was sufficient for low time-division driving such as watches and calculators, but when it is driven in high time divisions to increase the display capacity, it has the disadvantage that the contrast decreases and the viewing angle becomes narrower. was there. This is because with high time division driving, the ratio of voltages applied to selected points and non-selected points approaches 1, and in order to obtain a display element with high contrast and a wide viewing angle, the relative transmittance of the element must be increased 5 times. The voltage V changes by 50% and the voltage V changes by 4°.
の比（Ｖ、。／Ｖ、。）で表わされる急峻度γをできる
だけ小さくすることが必要である。It is necessary to make the steepness γ, expressed as the ratio (V,./V,.), as small as possible.
ツィステッドネマチック型の場合、このγ値は１．１層
程度である。このγ値を小さくするために、液晶分子の
ねじれ角を大きくし、偏光軸を配向方向とずらす方式が
提案されており、ＳＢＥモードやＳＴＮモードと呼ばれ
ている。このような方式によると、γ値を１．１以下に
することができ、 ｌ／４００デユ一テイ程度の高時分
割駆動が可能になる。In the case of twisted nematic type, this γ value is about 1.1 layers. In order to reduce this γ value, a method has been proposed in which the twist angle of the liquid crystal molecules is increased and the polarization axis is shifted from the orientation direction, and this method is called SBE mode or STN mode. According to such a system, the γ value can be reduced to 1.1 or less, and high time-division driving of about 1/400 duty is possible.
従来のスーパーツィステッドネマチック型（以下、単に
ＳＴＮという）の液晶表示素子においては、背景色が黄
色で表示色が暗青色になるイエローモ−ドと、背景色が
深青色で表示色がほとんど白色に見えるブルーモードに
より使用されている。しかし、従来のセル構成では、２
枚の偏光板の一方の透過軸方向を約９０度変更しなけれ
ばこの２つのモードを切換えることができないため、実
際には、これら２つのモードのうち、一方のモードでし
か表示できなかった。Conventional super twisted nematic (hereinafter simply referred to as STN) liquid crystal display devices have two modes: a yellow mode in which the background color is yellow and the display color is dark blue, and a yellow mode in which the background color is deep blue and the display color is almost white. Used by visible blue mode. However, in the conventional cell configuration, 2
Since it is not possible to switch between these two modes without changing the transmission axis direction of one of the polarizing plates by about 90 degrees, it is actually possible to display in only one of these two modes.
本発明は、前記従来技術の欠点を克服し、イエローモー
ドとブルーモードの両者を任意に切換えることを可能に
し、特性の向上した大容量表示の液晶表示素子を提供す
ることを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to overcome the drawbacks of the prior art described above, to provide a liquid crystal display element with improved characteristics and a large capacity display, which makes it possible to arbitrarily switch between the yellow mode and the blue mode.
本発明によれば、２層の液晶層を有する液晶セルと該液
晶セルをはさむように２枚の偏光板を配置した液晶表示
素子において、一方の液晶層での液晶分子のねじれ角が
９０度を超え２７０度以下であり、他方の液晶層でのね
じれ角が約９０度であることを特徴とする液晶表示素子
が提供される。According to the present invention, in a liquid crystal display element including a liquid crystal cell having two liquid crystal layers and two polarizing plates arranged to sandwich the liquid crystal cell, the twist angle of the liquid crystal molecules in one liquid crystal layer is 90 degrees. Provided is a liquid crystal display element characterized in that the twist angle in the other liquid crystal layer is about 90 degrees.
次に本発明を図面により説明する。Next, the present invention will be explained with reference to the drawings.
第１図に本発明の液晶表示素子の構成例の断面図を示す
。本発明の液晶表示素子の楕成は、原理的には、ＴＮ型
液晶表示素子とＳＴＮ型液晶表示素子の組合せからなる
もので、第１図に示したように、基板１２を介してＴＮ
型液晶表示素子とＳＴＮ型液晶表示素子とが一体に結合
している。この液晶表示素子は、模式的には、第２図に
示すように、基板Ａ−１、液晶層Ｂ−１、基板Ａ−２、
液晶ｆｆＪＢ−２及び基板Ａ−３が積層された構造にな
っている。この場合、基板Ａ−２は、１枚の基板からな
る必要はなく、第３図に示すように、２枚の基板Ａ−２
′とＡ−２”とから楕成し、通常の構成のＴＮ型液晶表
示素子とＳＴＮ型液晶表示素子とを重ねた構造のものに
することができる。FIG. 1 shows a cross-sectional view of a configuration example of a liquid crystal display element of the present invention. The elliptical structure of the liquid crystal display element of the present invention is, in principle, composed of a combination of a TN type liquid crystal display element and an STN type liquid crystal display element, and as shown in FIG.
A type liquid crystal display element and an STN type liquid crystal display element are integrally coupled. As shown in FIG. 2, this liquid crystal display element schematically includes a substrate A-1, a liquid crystal layer B-1, a substrate A-2,
It has a structure in which a liquid crystal ffJB-2 and a substrate A-3 are stacked. In this case, the substrate A-2 does not need to consist of one substrate, but as shown in FIG.
' and A-2'', and can have a structure in which a TN type liquid crystal display element and an STN type liquid crystal display element of a normal configuration are stacked.
第１図において、上側の液晶層６がＴＮ型、下側の液晶
層１６がＳＴＮ型として説明すると、配向膜５の近傍の
液晶分子長軸の方向と、偏光板１の透過軸方向は略平行
または略垂直となっている。液晶層６において、液晶分
子長軸の方向は配向膜５がら配向膜１５の間で約９０°
ねじれている。配向膜１５と２５の近傍での液晶分子長
軸方向は、互いに３０”−６０’の角度を成す。液晶層
Ｉ６において、液晶分子長軸の方向は、配向膜２５から
配向膜３５の間で９０°〜２７０゜ねじれている。配向
膜３５の近傍の液晶分子長軸の方向と、偏光板１１の透
過軸方向は略平行または略垂直である。第３図のように
、ＴＮ型液晶表示素子とＳＴＮ型液晶表示素子とを別々
に作った後、重ねる場合も、上記と全く同様である。液
晶層１６の層厚をｄ、屈折率異方性をΔｎ、液晶分子の
ねじれ角をωとすると、これらの関係は、次式を満足さ
せるのが好ましい。In FIG. 1, assuming that the upper liquid crystal layer 6 is of the TN type and the lower liquid crystal layer 16 is of the STN type, the direction of the long axis of the liquid crystal molecules near the alignment film 5 and the direction of the transmission axis of the polarizing plate 1 are approximately equal to each other. Parallel or almost perpendicular. In the liquid crystal layer 6, the direction of the long axis of the liquid crystal molecules is about 90° between the alignment film 5 and the alignment film 15.
It's twisted. The directions of the long axes of liquid crystal molecules in the vicinity of the alignment films 15 and 25 form an angle of 30''-60' with each other. It is twisted by 90° to 270°.The direction of the long axis of the liquid crystal molecules near the alignment film 35 and the direction of the transmission axis of the polarizing plate 11 are approximately parallel or approximately perpendicular.As shown in FIG. When the element and the STN type liquid crystal display element are made separately and then stacked, the process is exactly the same as above.The layer thickness of the liquid crystal layer 16 is d, the refractive index anisotropy is Δn, and the twist angle of the liquid crystal molecules is ω. Then, it is preferable that these relationships satisfy the following equation.
−０，００２３（、）＋１．２６≦Δｎｄ≦−０，００
２３ω＋１．４５ （Ｉ ）各パラメーターを前記式
（１）のように設定すると、セルの色は橙色〜黄緑また
は赤紫〜青となる。−0,0023(,)+1.26≦Δnd≦−0,00
23ω+1.45 (I) When each parameter is set as in the above formula (1), the color of the cell becomes orange to yellow-green or reddish-purple to blue.
２枚の偏光板のうち１枚の過透軸を９０°回すと、この
色は互いに入れかわる。各パラメーターは前記式（１）
を満足する範囲で調整できるが、セルが明るいときの色
が黄色、暗いときの色を青として以下説明する。When the transmission axis of one of the two polarizing plates is rotated by 90 degrees, the colors change. Each parameter is expressed by the above formula (1)
The color can be adjusted within a range that satisfies the following, but the following description will be made assuming that the color when the cell is bright is yellow, and the color when it is dark is blue.
ＴＮ型液晶表示素子の部分（３，５，６，１５，１３）
とＳＴＮ型液晶表示素子の部分（２３，２５，１６，３
５，３３）のどちらもＯＦＦ状態で、セルが黄色のとき
、ＴＮ型部分をＯＮにするとＴＮ型部分の旋光性が失な
われるため、一方の偏光板を９０度廻したのと同じ効果
が得られ、セ。TN type liquid crystal display element part (3, 5, 6, 15, 13)
and STN type liquid crystal display element parts (23, 25, 16, 3
When both 5 and 33) are OFF and the cell is yellow, turning on the TN portion will cause the optical rotation of the TN portion to be lost, resulting in the same effect as rotating one polarizing plate 90 degrees. Obtained, se.
ルは青色となる。つまりＴＮ型部分のＯＮ、ＯＦＦによ
りイエローモードとブルーモードの切換えが可能にりる
。ＴＮ型部分の電極パターンをＳＴＮ型部分の電極パタ
ーンと一致させれば、画素ごとにこの切り替えが可能に
なる。この必要がなければ、ＴＮ型部分の電極パターン
をもつとあらいものとし、ＳＴＮ型部分の画素をいくつ
かまとめて切換えることもできる。ＴＮ型部分の電極パ
ターンがあらいときや、ベタ電極であるときは、第３図
の構成でも良いが、ＴＮ型部分の電極パターンがＳＴＮ
型部分のパターンと同等程度に細いときは、第２図の構
成をとる必要がある。color becomes blue. In other words, switching between yellow mode and blue mode is possible by turning the TN type part ON and OFF. If the electrode pattern of the TN type portion is made to match the electrode pattern of the STN type portion, this switching becomes possible for each pixel. If this is not necessary, it is also possible to make the electrode pattern of the TN type part rough and switch some of the pixels of the STN type part at once. If the electrode pattern of the TN type part is rough or a solid electrode, the configuration shown in Fig. 3 may be used, but if the electrode pattern of the TN type part is STN.
When the pattern is as thin as the mold part, it is necessary to adopt the configuration shown in FIG.
本発明では、 ＳＴＮ型において、ブルーモードとイエ
ローモードを任意に切換えることを可能にし、液晶表示
機能を著しく多様化したものである。In the present invention, it is possible to arbitrarily switch between blue mode and yellow mode in the STN type, and the liquid crystal display functions are significantly diversified.
次に本発明を実施例によりさらに詳細に説明する。 Next, the present invention will be explained in more detail with reference to Examples.
実施例
第１図に示したのと同じ構成の液晶表示素子を作製した
。この場合、液晶組成物として、ネマチック液晶にカイ
ラルネマティック液晶（メルク社製、５８１１）を混合
したものを用いた。ＳＴＮ型部分の液晶層（１６）のツ
イスト角ωは２００’ 、セル厚は約７μｍで、基板は
ＩＴＯ電極パターン付きのガラスを用いた。Example A liquid crystal display element having the same structure as shown in FIG. 1 was manufactured. In this case, the liquid crystal composition used was a mixture of nematic liquid crystal and chiral nematic liquid crystal (manufactured by Merck & Co., Ltd., 5811). The twist angle ω of the liquid crystal layer (16) in the STN type part was 200', the cell thickness was about 7 μm, and the substrate was glass with an ITO electrode pattern.
このような構成の液晶表示素子においては、イエローモ
ードの状態でＳＴＮ部分を駆動すると、明るい黄色の背
景に暗青色の表示が現れる。一方、ＴＮ部分を駆動して
、画面半分をブルーモードに切換えると、切換った部分
は暗青色の背景に白色の表示となった。イエローモード
の状態でＴＮ部分を能動すると、明るい黄色の背景に暗
青色の表示が得られた。この場合、駆動されているのは
ＴＮ型部分なので、応答は約１００ｍ５と速かった。ま
た、このような液晶表示素子では、背景の色を変えられ
るので、強調表示に最適であった。また、ＴＮ型部分の
応速か速いので、−時的に表示容量を減らしても速く動
作させることが可能であった。In a liquid crystal display element having such a configuration, when the STN portion is driven in a yellow mode state, a dark blue display appears on a bright yellow background. On the other hand, when half of the screen was switched to blue mode by driving the TN section, the switched section was displayed in white on a dark blue background. When the TN portion was activated in the yellow mode, a dark blue display on a bright yellow background was obtained. In this case, since it was the TN type part that was being driven, the response was as fast as approximately 100 m5. Furthermore, in such a liquid crystal display element, the background color can be changed, making it ideal for highlighting. In addition, since the response of the TN type part was fast, it was possible to operate quickly even if the display capacity was temporarily reduced.
第１図は本発明の液晶表示素子の構成例を示す断面図を
示す、第２図及び第３図は、液晶表示素子の模式図を示
す。
■、１１・・・・・・・・・・・・偏光板、２，１２，
２２・・・基板。
３．１３，２３，３３・・・表示電極、 ４．１４・
・・・・・シール材、５．１５，２５．３５・・・配向
膜、 ６，１６・・・・・・液晶層。FIG. 1 shows a sectional view showing a configuration example of a liquid crystal display element of the present invention, and FIGS. 2 and 3 show schematic diagrams of the liquid crystal display element. ■, 11...Polarizing plate, 2, 12,
22...Substrate. 3.13,23,33...display electrode, 4.14.
... Seal material, 5.15, 25.35 ... Alignment film, 6,16 ... Liquid crystal layer.
Claims (1)
さむように２枚の偏光板を配置した液晶表示素子におい
て、一方の液晶層での液晶分子のねじれ角が９０度を超
え２７０度以下であり、他方の液晶層でのねじれ角が約
９０度であることを特徴とする液晶表示素子。(1) In a liquid crystal display element in which a liquid crystal cell has two liquid crystal layers and two polarizing plates are arranged to sandwich the liquid crystal cell, the twist angle of the liquid crystal molecules in one liquid crystal layer exceeds 90 degrees and is 270 degrees. A liquid crystal display element characterized in that the twist angle in the other liquid crystal layer is about 90 degrees or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62297929A JPH01137232A (en) | 1987-11-25 | 1987-11-25 | liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62297929A JPH01137232A (en) | 1987-11-25 | 1987-11-25 | liquid crystal display element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01137232A true JPH01137232A (en) | 1989-05-30 |
Family
ID=17852918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62297929A Pending JPH01137232A (en) | 1987-11-25 | 1987-11-25 | liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01137232A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04161924A (en) * | 1990-10-24 | 1992-06-05 | Sharp Corp | Color liquid crystal display device |
| US5136406A (en) * | 1987-10-06 | 1992-08-04 | Asahi Glass Company Ltd. | Plural layer liquid crystal display device for a high density display |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62153832A (en) * | 1985-12-26 | 1987-07-08 | Stanley Electric Co Ltd | liquid crystal display device |
-
1987
- 1987-11-25 JP JP62297929A patent/JPH01137232A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62153832A (en) * | 1985-12-26 | 1987-07-08 | Stanley Electric Co Ltd | liquid crystal display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5136406A (en) * | 1987-10-06 | 1992-08-04 | Asahi Glass Company Ltd. | Plural layer liquid crystal display device for a high density display |
| JPH04161924A (en) * | 1990-10-24 | 1992-06-05 | Sharp Corp | Color liquid crystal display device |
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