JPH01210934A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPH01210934A JPH01210934A JP3617188A JP3617188A JPH01210934A JP H01210934 A JPH01210934 A JP H01210934A JP 3617188 A JP3617188 A JP 3617188A JP 3617188 A JP3617188 A JP 3617188A JP H01210934 A JPH01210934 A JP H01210934A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- layer
- birefringence
- birefringent
- display element
- 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 52
- -1 polyethylene terephthalate Polymers 0.000 abstract description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract description 4
- 239000005020 polyethylene terephthalate Substances 0.000 abstract description 4
- 239000011521 glass Substances 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract 2
- 239000013078 crystal Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 210000002858 crystal cell Anatomy 0.000 description 5
- 239000004988 Nematic liquid crystal Substances 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 description 1
- 239000004990 Smectic liquid crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002120 nanofilm Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
-
- 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
- G02F2202/00—Materials and properties
- G02F2202/40—Materials having a particular birefringence, retardation
-
- 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
- G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
- G02F2413/02—Number of plates being 2
Abstract
Description
【発明の詳細な説明】
〔従来技術〕
従来、液晶表示素子として、液晶層と偏光子を組合せた
構造のものに知られており、ツイストネマチック（ＴＮ
）型やスーパーツイストネマチック型の表示モードで使
用されている。このような液晶表示素子に見られる一般
的欠点として、見る方向によりコントラストが変化した
り、背景色や表示色が変化し１表示の視角依存性が大き
いことが挙げられる。[Detailed Description of the Invention] [Prior Art] Conventionally, liquid crystal display elements having a structure in which a liquid crystal layer and a polarizer are combined are known.
) type and super twisted nematic type display mode. General drawbacks of such liquid crystal display elements include that the contrast changes depending on the viewing direction, that the background color and display color change, and that one display is highly dependent on the viewing angle.
本発明は、液晶表示素子に見られる前記欠点を克服する
ことを目的とする。The present invention aims to overcome the above-mentioned drawbacks found in liquid crystal display elements.
本発明によれば、液晶層と偏光子との間に複屈折層を配
置した構造を有し、かつ該複屈折層の複、屈折の大きさ
を１．７．以上に規定した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, the structure has a birefringence layer disposed between a liquid crystal layer and a polarizer, and the birefringence of the birefringence layer is 1.7. A liquid crystal display element characterized by the above definition is provided.
次に、本発明を図面により説明する。第１図は本発明の
液晶表示素子の基本構成例を示すものであり、液晶層（
液晶セル）ｌに複屈折層２及び偏光子３をその順に積層
させた構造を有する。この場合、各層は接着させるのが
よいが、必ずしも接着させる必要はない、液晶層は、ネ
マチック液晶、コレステリック液晶、スメチック液晶及
びそれらに２色性色素を混入したもの等従来公知の各種
のものが用いられる。また偏光子としては、一般に偏光
板として用いられているものであればよく、例えば、２
色性膜偏光子や、それと位相板を組合せたもの等が用い
られる。複屈折層３は、従来公知の有機及び無機系の複
屈折媒質を用いて形成することができる。大きな面積の
複屈折層を形成する時には、延伸した高分子フィルムが
一般に使用される。Next, the present invention will be explained with reference to the drawings. FIG. 1 shows an example of the basic configuration of the liquid crystal display element of the present invention, in which the liquid crystal layer (
The liquid crystal cell has a structure in which a birefringent layer 2 and a polarizer 3 are laminated in that order on a liquid crystal cell. In this case, it is preferable to bond each layer, but it is not necessary to bond them together.The liquid crystal layer may be made of various conventionally known liquid crystals such as nematic liquid crystal, cholesteric liquid crystal, smectic liquid crystal, and those mixed with dichroic dyes. used. Further, the polarizer may be one that is generally used as a polarizing plate, for example, 2
A chromatic film polarizer or a combination thereof with a phase plate is used. The birefringent layer 3 can be formed using conventionally known organic and inorganic birefringent media. When forming large area birefringent layers, stretched polymeric films are generally used.
本発明においては、複屈折層の複屈折の大きさを１ 、
７ ｐｍ以上、好ましくは２ｐｖａ以上に規定する。複
屈折の大きさの■１限は特に制約されない、このような
複屈折層を液晶層ｌと偏光子との間に配置することによ
り、液晶表示素子の視角依存性を大幅に低減させ、表示
品質のすぐれた液晶表示素子を得ることができる。In the present invention, the magnitude of birefringence of the birefringent layer is 1,
7 pm or more, preferably 2 pva or more. There is no particular restriction on the magnitude of birefringence.By arranging such a birefringent layer between the liquid crystal layer l and the polarizer, the viewing angle dependence of the liquid crystal display element can be significantly reduced, and the display can be improved. A liquid crystal display element of excellent quality can be obtained.
本発明において、複屈折層の’ＰＭ）ｓ！折の大きさは
、複屈折媒質を適当に選ぶことにより規定することがで
きる。複屈折の大きさが１．７声以上の複屈折媒体とし
ては１例えば、延伸したＮＧ分子フィルムの他、雲母、
方解石、水晶等の鉱物の薄片等が挙げられる。延伸した
高分子フィルムにおいては、その延伸倍率によって複屈
折の大きさを調節することができる。また、複数の複屈
折媒質を組合せることによっても複屈折の大きさを調節
することができる。In the present invention, 'PM)s! of the birefringent layer! The magnitude of the refraction can be determined by appropriately selecting a birefringent medium. Examples of birefringent media with a birefringence of 1.7 tones or more include 1, for example, in addition to stretched NG molecular film, mica,
Examples include flakes of minerals such as calcite and quartz. In a stretched polymer film, the magnitude of birefringence can be adjusted by adjusting the stretching ratio. Furthermore, the magnitude of birefringence can also be adjusted by combining a plurality of birefringence media.
本発明の液晶表示素子の他の構成例を第２図に示す、第
２図のものは、現在最も一般的に使用されているもので
、２枚の偏光板３，３′の間に液晶層１が配置された構
造を有する。本発明では、このような構造の液晶表示素
子に対しては、複屈折）Ｃ１０を、液晶層１と偏光板３
又は３′との間に配置するか（第２図）又は第３１閑に
示すように、液晶層１と偏光板３との間及び液晶層１と
偏光板３′との間に各配置する。また、ｆｊＳ２図及び
第３図において、偏光板３又は３′の一方を偏光反射板
とすることができるが、この場合にも、複屈折層は、液
晶層と偏光板との間又は液晶層と偏光反射板との間ある
いは液晶層と偏光板との間及び液晶層と偏光反射板との
間の両方に配置することができる。第３図に示す如く液
晶層の両側に複屈折層を配置する場合にも、各複屈折層
の複屈折の大きさは１．７−以上にする。Another example of the structure of the liquid crystal display element of the present invention is shown in FIG. 2. The structure shown in FIG. It has a structure in which layer 1 is arranged. In the present invention, for a liquid crystal display element having such a structure, birefringence) C10 is
or between the liquid crystal layer 1 and the polarizing plate 3 and between the liquid crystal layer 1 and the polarizing plate 3' as shown in FIG. . In addition, in FIG. It can be arranged both between the liquid crystal layer and the polarizing reflector, between the liquid crystal layer and the polarizing plate, and between the liquid crystal layer and the polarizing reflector. Even when birefringent layers are arranged on both sides of the liquid crystal layer as shown in FIG. 3, the magnitude of birefringence of each birefringent layer is set to 1.7 or more.
本発明における液晶表示素子の駆動には、熱書き込み型
や、電界印加型のいずれの方式をも採用することができ
る、本発明の原理は、液晶のタイプ及び駆動のタイプに
は何ら制約を受けるものではない。For driving the liquid crystal display element in the present invention, either a thermal writing type or an electric field application type can be adopted.The principle of the present invention is not limited by the type of liquid crystal and the type of driving. It's not a thing.
本発明によれば、液晶層と偏光板を絹、合せた構造の液
晶表示素子において、前記のように複屈折の大きさが！
、７／Ｊｌｏ以」二の複屈折層を配置するという極めて
簡便な手段により、液晶セルによる表示の視角依存性を
大幅に低減させ、表示品質のすぐれた液晶表示素子を得
ることができる。According to the present invention, in a liquid crystal display element having a structure in which a liquid crystal layer and a polarizing plate are made of silk, the magnitude of birefringence is as described above!
, 7/Jlo" or more", the viewing angle dependence of the display by the liquid crystal cell can be significantly reduced, and a liquid crystal display element with excellent display quality can be obtained.
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
ガラス基板を用いて液晶セルを作り、ネマティック液晶
（メルク社製ＺＬＩ−２２９３）を主成分とする液晶を
封入した。この液晶セルの片側に、−軸延伸したポリエ
チレンテレフタレー（−（複屈折の大きさ：約１０趨）
を配置し、これらをはさむように２枚の偏光板（王立電
機製ＬＬＣ，８２−１２）を配”ｊｔ Ｌ＋、第２図に
示す構成の液晶表示素子を作製した。この液晶表示素子
において、ポリエチレンテレフタレートがない場合、表
示色、背景色は見る方向により大きく変化したが、ポリ
エチレンテレフタレートを用いた構成ではあまり変化せ
ず、表示品質が著しく向」ニした。Example A liquid crystal cell was made using a glass substrate, and a liquid crystal whose main component was a nematic liquid crystal (ZLI-2293 manufactured by Merck & Co., Ltd.) was sealed therein. On one side of this liquid crystal cell, -axially stretched polyethylene terephthalate (-(birefringence size: about 10 points)
A liquid crystal display element having the configuration shown in FIG. In the case without polyethylene terephthalate, the display color and background color changed significantly depending on the viewing direction, but in the configuration using polyethylene terephthalate, the display color did not change much, and the display quality was significantly improved.
【図面の簡単な説明】
第１図は本発明の液晶表示素子の基本構成図を示し、第
２図及び第３図はその変更例を示す。
１・・・液晶層、２，２′・・・複屈折層、３，３′・
・・偏光板。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a basic configuration diagram of a liquid crystal display element of the present invention, and FIGS. 2 and 3 show modifications thereof. 1...Liquid crystal layer, 2,2'...birefringent layer, 3,3'...
··Polarizer.
Claims (3)
造を有し、かつ該複屈折層の複屈折の大きさを１．７μ
ｍ以上に規定したことを特徴とする液晶表示素子。(1) It has a structure in which a birefringent layer is arranged between the liquid crystal layer and the polarizer, and the birefringence of the birefringent layer is 1.7μ.
A liquid crystal display element characterized in that it is specified to be equal to or more than m.
側又は両側と該偏光子との間に複屈折性層を配置した構
造を有し、かつ該複屈折性層の複屈折の大きさを１．７
μｍ以上に規定したことを特徴とする液晶表示素子。(2) It has a structure in which a liquid crystal layer is arranged between two polarizers, and a birefringent layer is arranged between one or both sides of the liquid crystal layer and the polarizer, and the birefringent layer is The magnitude of birefringence is 1.7
A liquid crystal display element characterized in that it is defined as μm or more.
液晶層と該偏光子との間又は該液晶層と該偏光反射板と
の間あるいはその両方に複屈折性層を配置した構造を有
し、かつ該複屈折性層の複屈折の大きさを１．７μｍ以
上に規定したことを特徴とする液晶表示素子。(3) A liquid crystal layer is arranged between a polarizer and a polarizing reflector, and a birefringent layer is provided between the liquid crystal layer and the polarizer, or between the liquid crystal layer and the polarizing reflector, or both. 1. A liquid crystal display element having a structure in which the birefringent layer has a birefringence of 1.7 μm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3617188A JPH01210934A (en) | 1988-02-18 | 1988-02-18 | Liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3617188A JPH01210934A (en) | 1988-02-18 | 1988-02-18 | Liquid crystal display element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01210934A true JPH01210934A (en) | 1989-08-24 |
Family
ID=12462305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3617188A Pending JPH01210934A (en) | 1988-02-18 | 1988-02-18 | Liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01210934A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5250214A (en) * | 1990-04-09 | 1993-10-05 | Ricoh Company, Ltd. | Liquid crystal color display device provided with a color filter film and an optical phase plate comprising liquid crystal polymer |
| US5380459A (en) * | 1990-04-20 | 1995-01-10 | Ricoh Company, Ltd. | Liquid crystal display device with improved viewing angle dependence of color |
| US5493429A (en) * | 1990-10-26 | 1996-02-20 | Ricoh Company, Ltd. | Color liquid crystal device having thickness controlling layers disposed at non-pixel portions and between adjacent color filters |
| WO2006025002A1 (en) * | 2004-09-03 | 2006-03-09 | Koninklijke Philips Electronics N.V. | Display device with birefringent substrate |
-
1988
- 1988-02-18 JP JP3617188A patent/JPH01210934A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5250214A (en) * | 1990-04-09 | 1993-10-05 | Ricoh Company, Ltd. | Liquid crystal color display device provided with a color filter film and an optical phase plate comprising liquid crystal polymer |
| US5380459A (en) * | 1990-04-20 | 1995-01-10 | Ricoh Company, Ltd. | Liquid crystal display device with improved viewing angle dependence of color |
| US5493429A (en) * | 1990-10-26 | 1996-02-20 | Ricoh Company, Ltd. | Color liquid crystal device having thickness controlling layers disposed at non-pixel portions and between adjacent color filters |
| WO2006025002A1 (en) * | 2004-09-03 | 2006-03-09 | Koninklijke Philips Electronics N.V. | Display device with birefringent substrate |
| JP2008511854A (en) * | 2004-09-03 | 2008-04-17 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Display device having birefringent substrate |
| EP1980899A3 (en) * | 2004-09-03 | 2008-10-29 | Sumitomo Chemical Company, Limited | Display device with birefringent substrate |
| US7671520B2 (en) | 2004-09-03 | 2010-03-02 | Sumitomo Chemical Co., Ltd. | Display device with birefringent substrate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5923392A (en) | Liquid crystal display device | |
| TWI322290B (en) | Liquid crystal display | |
| US7327432B2 (en) | Optically compensated electro-optical light modulation element with optically isotropic phase | |
| JPH07199173A (en) | Liquid crystal display, picture element and manufacture thereof | |
| JP2002040429A (en) | Wide viewing angle liquid crystal display device utilizing compensation film | |
| JPH02245725A (en) | Liquid crystal display device and phase plate for this display device | |
| JPH0367219A (en) | Liquid crystal display element | |
| TWI305849B (en) | ||
| JPH01210934A (en) | Liquid crystal display element | |
| JPH03121523A (en) | Touch panel integrated type liquid crystal display device | |
| JP3206177B2 (en) | Phase difference plate and liquid crystal display device using the same | |
| JP3373939B2 (en) | Optical anisotropic element and liquid crystal display element using the same | |
| WO2001018593A1 (en) | Liquid crystal shutter | |
| JP3770974B2 (en) | Liquid crystal display | |
| JP2881214B2 (en) | Liquid crystal display device | |
| JP2003029264A (en) | Liquid crystal display device | |
| JPS6227721A (en) | Liquid crystal optical modulating element rendered with memory characteristic | |
| JPH02304526A (en) | Liquid crystal display element | |
| JP2803820B2 (en) | Liquid crystal display device | |
| JPH10170909A (en) | Liquid crystal display device | |
| JP2814960B2 (en) | Liquid crystal display | |
| JPH01137232A (en) | Liquid crystal display element | |
| JP3888791B2 (en) | Reflective display device | |
| JPH01282519A (en) | Liquid crystal element | |
| JP2674508B2 (en) | Liquid crystal device |