JPS63271422A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPS63271422A JPS63271422A JP10771087A JP10771087A JPS63271422A JP S63271422 A JPS63271422 A JP S63271422A JP 10771087 A JP10771087 A JP 10771087A JP 10771087 A JP10771087 A JP 10771087A JP S63271422 A JPS63271422 A JP S63271422A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- cell
- nematic liquid
- display
- display device
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 44
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 28
- 239000004988 Nematic liquid crystal Substances 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 abstract description 9
- 230000003068 static effect Effects 0.000 abstract description 9
- 210000004027 cell Anatomy 0.000 description 15
- 210000003719 b-lymphocyte Anatomy 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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
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】 〔産業上の利用分野〕 本発明は液晶表示装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a liquid crystal display device.
従来のスーパーツィステッドネマチック型液晶表示装置
は特開昭６０−５０５１１号公報のように液晶分子のね
じれ角が９０度以上であり、液晶セルの上下に一対の偏
光板を設け、これらの偏光軸（あるいは吸収軸）と、電
極基板に隣接する液晶分子の長軸方向とのなす挟角が３
０１ｆから６０度の範囲であった。そのために、例えば
ポジ表示の場合、液晶セルに対し電圧無印加状態での外
観の色相が白色ではな（緑色から黄赤色にかけての色相
になり、選択電圧印加状態での外観色相は黒色ではなく
青色になっていた。そこでこれを解決する手段として、
最近前記液晶セルの上下に配置された一対の偏光板の間
に、前記液晶セル以外にねじれ配向した第２のネマチッ
ク液晶を挟持した第２の液晶セルを備えて白黒表示を可
能にした液晶表示ＨＲが提案されている。In the conventional super twisted nematic type liquid crystal display device, as disclosed in Japanese Patent Application Laid-Open No. 60-50511, the twist angle of the liquid crystal molecules is 90 degrees or more, and a pair of polarizing plates are provided above and below the liquid crystal cell, and these polarization axes are (or the absorption axis) and the long axis direction of the liquid crystal molecules adjacent to the electrode substrate is an included angle of 3
The range was 60 degrees from 01f. For this reason, for example, in the case of positive display, the external hue when no voltage is applied to the liquid crystal cell is not white (it is a hue ranging from green to yellow-red), and when a selection voltage is applied, the external hue is not black but blue. Therefore, as a means to solve this problem,
Recently, a liquid crystal display HR has been developed which is equipped with a second liquid crystal cell in which, in addition to the liquid crystal cell, a second twisted nematic liquid crystal is sandwiched between a pair of polarizing plates placed above and below the liquid crystal cell, thereby making black and white display possible. Proposed.
前記第２の液晶セルに用いる第２のネマチック液晶とし
ては比抵抗が少なくともｔｘｔｏ”Ω−１以上の組成物
が用いられているが、これでは前記第２の液晶セルに静
電気が加わるとその影唇を受けて第２のネマチック液晶
の分子配向が乱れることがあり、その結果これが表示ム
ラとなり、表示品位を著しく低下させていた。As the second nematic liquid crystal used in the second liquid crystal cell, a composition having a resistivity of at least txto''Ω-1 or more is used, but in this case, if static electricity is applied to the second liquid crystal cell, the effect will be reduced. The molecular orientation of the second nematic liquid crystal may be disturbed by the contact with the lips, which results in display unevenness and significantly deteriorates display quality.
そこで本発明はこの様な問題点を解決するもので、その
目的とするところは、静電気によって第２の液晶セルが
影響を受けず常に安定して白黒表示ができる液晶表示装
置を提供することにある。SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and its purpose is to provide a liquid crystal display device that can always stably display black and white without having the second liquid crystal cell affected by static electricity. be.
本発明の液晶表示装置は、対向配置された一対のＴＬ極
極板板間ねじれ配向した第１のネマチック液晶を挾持し
てなる第１の液晶セルと、対向配置された一対の基板間
゛にねじれ配向した第２のネマチック液晶を挟持してな
る第２の液晶セルとを備え、かつ前記ｍｌ及び第２の液
晶セルとを挟んで両側に配置された一対の偏光板を存し
てなる液晶表示装置において、前記第２のネマチック液
晶に比抵抗がｌＸｌ０’Ω−ロ未清のネマチック液晶を
用いたことを特徴とする。The liquid crystal display device of the present invention has a first liquid crystal cell sandwiching a twistedly oriented first nematic liquid crystal between a pair of oppositely arranged TL electrode plates, and a first liquid crystal cell sandwiching a twistedly oriented first nematic liquid crystal between a pair of oppositely arranged substrates. a second liquid crystal cell sandwiching an aligned second nematic liquid crystal, and a pair of polarizing plates disposed on both sides with the ml and the second liquid crystal cell sandwiched therebetween. The apparatus is characterized in that the second nematic liquid crystal is a nematic liquid crystal having a resistivity of 1X10'Ω-2.
〔作用〕
本発明の液晶表示装置では、一対の偏光板の一方を通過
してきた直線偏光は前記第１の液晶セルを通ると、波長
により長軸の方向と離心率の異なる楕円偏光となる。そ
こでこの楕円偏光をある条件に設定された前記第２の液
晶セルに通す。すると第２の液晶セルを通過した光は、
約４００ｎｍから約７００ｎｍの範囲で離心率が１に近
＜、シかも長軸の方向がほぼそろった楕円偏光となる。[Function] In the liquid crystal display device of the present invention, the linearly polarized light that has passed through one of the pair of polarizing plates becomes elliptically polarized light whose major axis direction and eccentricity differ depending on the wavelength when passing through the first liquid crystal cell. Therefore, this elliptically polarized light is passed through the second liquid crystal cell set under certain conditions. Then, the light that passed through the second liquid crystal cell becomes
If the eccentricity is close to 1 in the range from about 400 nm to about 700 nm, the light becomes elliptically polarized light whose major axes are almost aligned.
そのためもう一方の偏光板を通過した光は、波長による
透過率の差が小さく白色となる。選択電圧印加時にも、
一対の偏光板の一方を通過した直線偏光が前記第１の液
晶セルを通ると波長により長袖の方向と離心率が異なる
楕円偏光となる。そしてこの楕円偏光が前記第２の液晶
セルを通過すると、離心率が１に近＜、シかも長軸の方
向がほぼそろった楕円偏光となる。このときの楕円偏光
の長軸の方向は電圧無印加時のときの楕円偏光の長軸方
向と約９０度ずれているので、偏光板の偏光軸の方向を
適当に決めると、白黒表示の液晶表示装置となる。ここ
で、第２の液晶セルに用いる第２のネマチック液晶とし
て比抵抗がｌＸｌ０’Ω−１以上のネマチック液晶を用
いた場合、外部から静電気が加わるとその影響を受けて
第２の液晶セル中の液晶の分子配向が乱れ、このｈめ表
示外観に色ムラが現われ、表示品位を落とすことがある
。従って静電気が加わってもその影響を受けることなく
、色ムラが出ない表示外観を得るには第２の液晶セルに
比抵抗がｌＸｌ０■Ω−１未満のネマチック液晶を用い
ることにより実現することが発見された。Therefore, the light that passes through the other polarizing plate has a small difference in transmittance depending on the wavelength and becomes white. Even when applying a selected voltage,
When the linearly polarized light that has passed through one of the pair of polarizing plates passes through the first liquid crystal cell, it becomes elliptically polarized light whose eccentricity differs from the direction of the long sleeve depending on the wavelength. When this elliptically polarized light passes through the second liquid crystal cell, it becomes elliptically polarized light whose eccentricity is close to 1 and whose major axes are substantially aligned. The direction of the long axis of the elliptically polarized light at this time is approximately 90 degrees off from the long axis direction of the elliptically polarized light when no voltage is applied. It becomes a display device. Here, if a nematic liquid crystal with a specific resistance of lXl0'Ω-1 or more is used as the second nematic liquid crystal used in the second liquid crystal cell, when static electricity is applied from the outside, the inside of the second liquid crystal cell will be affected by the static electricity. The molecular orientation of the liquid crystal may be disturbed, causing color unevenness in the display appearance and degrading the display quality. Therefore, in order to obtain a display appearance that is not affected by static electricity and has no color unevenness, it is possible to achieve this by using a nematic liquid crystal with a specific resistance of less than lXl0■Ω-1 for the second liquid crystal cell. It's been found.
第１図は本発明による液晶表示装置の一例であり、その
構造をモデル的に示した断面図である。FIG. 1 is an example of a liquid crystal display device according to the present invention, and is a sectional view showing a model of its structure.
同図において、１は上側偏光板、２は比抵抗が１×１０
−Ω−１未清の第２のネマチック液晶を２枚の基板間に
挟んでねじれ配向させた第２の液晶セル（以降Ａセルと
呼ぶ）、３はＡセルの上側基板、４はＡセルの下側基板
、５は比抵抗が、ｌＸ１０會Ω−１未満の第２のネマチ
ック液晶、Ｂは電圧印加により表示を行なう、第１のね
じれ配向ネマチック液晶セル（以降Ｂセルと呼ぶ）、７
はＢセルの上側電極基板、８はＢセルの下側ｍ極基板、
９はＢセルの第１のネマチック液晶、１ｏは下側偏光板
を示したものである。In the same figure, 1 is the upper polarizing plate, 2 is the specific resistance of 1 × 10
-Ω-1 A second liquid crystal cell (hereinafter referred to as A cell) in which an unpurified second nematic liquid crystal is sandwiched between two substrates and twisted and oriented, 3 is the upper substrate of A cell, 4 is A cell 5 is a second nematic liquid crystal with a specific resistance of less than 1×10 Ω−1; B is a first twisted oriented nematic liquid crystal cell (hereinafter referred to as B cell) that performs display by applying a voltage; 7
8 is the upper electrode substrate of B cell, 8 is the lower m electrode substrate of B cell,
Reference numeral 9 indicates the first nematic liquid crystal of the B cell, and reference numeral 1o indicates the lower polarizing plate.
以下、本発明によるＡセルに用いた第２のネマチック液
晶について実施例を用いて説明する。The second nematic liquid crystal used in the A cell according to the present invention will be described below using Examples.
実施例Ｉ
Ａセルのネマチック液晶として、市販ＺＬＩ−１１３２
（メルク社製）に比抵抗を下げるための添加剤としてカ
ルボン酸のをａ酸第４級アンモニウム塩である
を比抵抗がｌＸｌ０”Ω−１未満になる様加えて調製し
、Ａセルに注入した。Example I As a nematic liquid crystal for A cell, commercially available ZLI-1132
(manufactured by Merck & Co.) was prepared by adding carboxylic acid (a-acid quaternary ammonium salt) as an additive to lower the resistivity so that the resistivity would be less than lXl0"Ω-1, and injected into the A cell. did.
これを第１図に示す構造に配し、静電気によって表示ム
ラが出るか調べたが、表示ムラは発生せず安定した白黒
表示が得られた。This was arranged in the structure shown in FIG. 1, and it was investigated whether display unevenness would occur due to static electricity, but no display unevenness occurred and a stable black and white display was obtained.
実施例２
Ａセルのネマチック液晶として、１０１Ω−１の比抵抗
を仔する市販のＺＬＩ−１７３５（メルク社製）に、さ
らに比抵抗を下げるための添加剤として実施例１と同じ
（１）式の化合物を加えて、１０７Ω−１台に調製し、
Ａセルに注入した。これを第１図に示す構造に配し、静
電気によって表示ムラが出るか調べたが、表示ムラは発
生せず安定した白黒表示が得られた。Example 2 A commercially available ZLI-1735 (manufactured by Merck & Co., Ltd.) having a specific resistance of 101 Ω-1 was used as the nematic liquid crystal of the A cell, and the same formula (1) as in Example 1 was used as an additive to further lower the specific resistance. Add the compound to adjust to 107Ω-1 unit,
Injected into A cell. This was arranged in the structure shown in FIG. 1, and it was investigated whether display unevenness would occur due to static electricity, but no display unevenness occurred and a stable black and white display was obtained.
尚、前記Ａセルのネマチック液晶の比抵抗を下げる物質
としては、前記実施例のみならず他の有機脂肪酸、を機
酸、金属塩などのイオン性の不純物でもよく、同様の効
果が得られることは言うまでもない。Note that the substance that lowers the resistivity of the nematic liquid crystal of the A cell is not limited to the above examples, but may also be other organic fatty acids, organic acids, ionic impurities such as metal salts, and similar effects can be obtained. Needless to say.
以上述べたように本発明によれば、液晶表示装置の外観
が、ＯＦＦ状態で白色となりＯＮ状態で黒色となる、心
理的、物理的に最も適したコントラストの高い白黒表示
が、表示部の基板面に手を触れたり、布等で拭くことに
より静電気が生じても表示ムラにならず、常に安定した
表示外観を存する液晶表示装置が得られるという極めて
優れた効果がある。As described above, according to the present invention, the external appearance of the liquid crystal display device is white in the OFF state and black in the ON state, and a black and white display with a high contrast that is most suitable psychologically and physically can be realized by the substrate of the display section. This has an extremely excellent effect in that even if static electricity is generated by touching the surface with a hand or wiping it with a cloth, a liquid crystal display device that does not display unevenness and always has a stable display appearance can be obtained.
第１図は本発明の液晶表示装置の構造をモデル的に説明
した断面図。同図において、ｌは上側偏光板、２はＡセ
ル、３はＡセルの上側基板、４はＡセルの下側基板、５
はＡセルの液晶、６はＢセル、７はＢセルの上側ｆｆｉ
Ｊ！基板、８はＢセルの下側電極基板、９はＢセルの
液遊、１０は下側偏光板を示したものである。
以 上FIG. 1 is a sectional view illustrating the structure of a liquid crystal display device according to the present invention as a model. In the figure, l is the upper polarizing plate, 2 is the A cell, 3 is the upper substrate of the A cell, 4 is the lower substrate of the A cell, and 5
is the liquid crystal of cell A, 6 is cell B, and 7 is the upper ffi of cell B.
J! The substrate, 8 is the lower electrode substrate of the B cell, 9 is the liquid droplet of the B cell, and 10 is the lower polarizing plate. that's all
Claims (1)
のネマチック液晶を挟持してなる第１の液晶セルと、対
向配置された一対の基板間にねじれ配向した第２のネマ
チック液晶を挟持してなる第２の液晶セルとを備え、か
つ前記第１及び第２の液晶セルを挟んで両側に配置され
た一対の偏光板を有してなる液晶表示装置において、前
記第２のネマチック液晶に比抵抗が１×１０＾■Ω＿−
ｃｍ未満のネマチック液晶を用いたことを特徴とする液
晶表示装置。The first electrode is twistedly oriented between a pair of electrode substrates arranged opposite to each other.
a first liquid crystal cell having a nematic liquid crystal sandwiched therebetween, and a second liquid crystal cell having a second nematic liquid crystal twistedly oriented between a pair of substrates disposed opposite to each other; and a liquid crystal display device comprising a pair of polarizing plates disposed on both sides of a second liquid crystal cell, the second nematic liquid crystal having a specific resistance of 1×10＾■Ω_−
A liquid crystal display device characterized by using a nematic liquid crystal having a size of less than cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10771087A JPS63271422A (en) | 1987-04-30 | 1987-04-30 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10771087A JPS63271422A (en) | 1987-04-30 | 1987-04-30 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63271422A true JPS63271422A (en) | 1988-11-09 |
Family
ID=14465985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10771087A Pending JPS63271422A (en) | 1987-04-30 | 1987-04-30 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63271422A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0385526A (en) * | 1989-08-30 | 1991-04-10 | Sharp Corp | Liquid crystal display device |
| JPH0385527A (en) * | 1989-08-30 | 1991-04-10 | Sharp Corp | Liquid crystal display device |
| WO2015089930A1 (en) * | 2013-12-20 | 2015-06-25 | 深圳市华星光电技术有限公司 | Display panel |
-
1987
- 1987-04-30 JP JP10771087A patent/JPS63271422A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0385526A (en) * | 1989-08-30 | 1991-04-10 | Sharp Corp | Liquid crystal display device |
| JPH0385527A (en) * | 1989-08-30 | 1991-04-10 | Sharp Corp | Liquid crystal display device |
| WO2015089930A1 (en) * | 2013-12-20 | 2015-06-25 | 深圳市华星光电技术有限公司 | Display panel |
| US9612491B2 (en) | 2013-12-20 | 2017-04-04 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Display panel |
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