JPS5834432A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPS5834432A JPS5834432A JP56132108A JP13210881A JPS5834432A JP S5834432 A JPS5834432 A JP S5834432A JP 56132108 A JP56132108 A JP 56132108A JP 13210881 A JP13210881 A JP 13210881A JP S5834432 A JPS5834432 A JP S5834432A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- plate
- display element
- display
- cell
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
Landscapes
- Physics & Mathematics (AREA)
- Liquid Crystal (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、横配向性を持つゲスト−ホスト液晶表示装置
において、受光反射型、透過型の表示について光分な見
安さを保証しようというものであり、液晶表示素子の裏
面側に半透過反射板を具備し、尚且その背後に偏光板、
光源（背行照明）から構成されたケストーホスト液晶表
示装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention aims to ensure light visibility for light-receiving and reflective type and transmissive type displays in guest-host liquid crystal display devices with lateral orientation, and it Equipped with a semi-transparent reflective plate on the back side, and a polarizing plate behind it.
The present invention relates to a Kestohost liquid crystal display device composed of a light source (backward illumination).
従来のケスト−ホスト途晶表示装置においては、半透過
反射板を用いることによって受光反射型表示、透過型表
示の両方の機能を付与することが可能になったが、表示
素子の見安さの要素である着色度については、必すしも
両方を満足しているとは言えない。すなわち、受光反射
型表示で充分な着色度があるものでも透過型表示では、
その着色度は低下する。これは、受光反射型表示ては光
は表示素子セル中を往復の二回通過し、着色部分では二
回の光吸収がなされるのに対し透過型では一回の光吸収
に終ってしまうからである。一方、横配向型のゲスト−
ホスト表示素子においては、偏光板をその偏光軸が、液
晶分子または色素分子の配向方向に一致させると、色素
分子による光吸収が効果的に行なわれ着色度が上がるこ
とは良く知られている。In the conventional KEST-HOST crystalline display device, it has become possible to provide both light-receiving and reflective display and transmissive display functions by using a semi-transmissive reflector, but the cost of viewing the display element has been compromised. Regarding the degree of coloration, it cannot necessarily be said that both are satisfied. In other words, even if there is a sufficient degree of coloring in a light-receiving and reflective display, in a transmissive display,
Its coloration level decreases. This is because in a light-receiving and reflective type display, the light passes through the display element cell twice, back and forth, and is absorbed twice in the colored area, whereas in a transmissive type, the light is absorbed only once. It is. On the other hand, the horizontally oriented guest −
It is well known that in a host display element, when the polarization axis of a polarizing plate is aligned with the alignment direction of liquid crystal molecules or dye molecules, light absorption by the dye molecules is effectively carried out and the degree of coloring is increased.
そこで同一表示素子において受光反射型表示と透過型表
示とで偏光板を使い分け、透過型表示のときにのみ用い
るということにすれば着色度の変らないものが得られる
。Therefore, if polarizing plates are used separately for light-receiving reflective display and transmissive display in the same display element, and are used only for transmissive display, the degree of coloration remains unchanged.
その方法を可能にしたのか本発明である。すなわち、半
透過反射板の背後（光源側）に偏光板をその偏光軸が表
示素子セルの配向方向と一致させて設蝕し、透過型表示
のときにのみ効果的にする方法である。このとき半透過
反射板に要求される性質としては、偏光度を充分に保持
することである。また、液晶がねじれ構造を持つ場合に
は、表示素子セルの光源側（裏面）電極基板での配向方
向に、偏光板の偏光軸を一致させておく必要がある。The present invention has made this method possible. That is, this is a method in which a polarizing plate is installed behind the transflective plate (on the light source side) so that its polarization axis coincides with the alignment direction of the display element cells, and is effective only in transmissive display. At this time, the property required of the transflector is to maintain a sufficient degree of polarization. Further, when the liquid crystal has a twisted structure, it is necessary to align the polarization axis of the polarizing plate with the alignment direction on the light source side (back side) electrode substrate of the display element cell.
即ち、本発明は、少なくとも一方の基板電極面が水平配
向処理された一対の電極基板を相対向して、セルを形成
し、託セルに多色性色素を含有した誘電異方性が正のコ
レステリック液晶をｆ１入しだ表示素子と、その後に配
置された半透過反射板、偏光板、背後照明光源とから成
ることを特徴とする液晶表示素子である。さらに詳しく
は、半透過反射板の背後（光源側）に偏光板をその偏光
軸が表示素子セルの配向方向と一致させて設置し、透過
型表示のときにのみ効果的にする方法である。このとき
半透過反射板に要求される性質としては、偏光度を充分
に保持することである。また、液晶がねじれ構造を持つ
場合には、表示素子セルの光源側（裏面）電極基板での
配向方向に、偏光板の偏光軸を一致させておく必要があ
る。That is, in the present invention, a pair of electrode substrates with at least one substrate electrode surface subjected to horizontal alignment treatment are placed opposite each other to form a cell, and the cell contains a pleochroic dye and has a positive dielectric anisotropy. This is a liquid crystal display element characterized by comprising a display element containing cholesteric liquid crystal f1, a transflective plate, a polarizing plate, and a back illumination light source arranged after the element. More specifically, this is a method in which a polarizing plate is installed behind the transflective plate (on the light source side) so that its polarization axis coincides with the alignment direction of the display element cells, making it effective only in transmissive display. At this time, the property required of the transflector is to maintain a sufficient degree of polarization. Further, when the liquid crystal has a twisted structure, it is necessary to align the polarization axis of the polarizing plate with the alignment direction on the light source side (back side) electrode substrate of the display element cell.
本発明の表示素子としては、少なくとも一方の基板電極
面が水平配向処理された一対の電極基板を相対向せしめ
てセルを形成するものである。この水平配向処理は両面
の基板ともにされていることが好ましく、電極又はその
上にオーバーコートされたＳｉＯ２、ポリイミド、その
他各種オーバーコート材層上にラビング法によりなされ
る又は斜め蒸着法によりなされれば良い。In the display element of the present invention, a cell is formed by placing a pair of electrode substrates, each of which has at least one substrate electrode surface subjected to horizontal alignment treatment, facing each other. This horizontal alignment treatment is preferably carried out on both sides of the substrate, and may be carried out on the electrode or on the SiO2, polyimide, or other various overcoat material layers overcoated thereon by a rubbing method or by an oblique vapor deposition method. good.
このようにして形成されたセルに、誘電異方性が正のコ
レステリック液晶が注入され封止される。このコレステ
リック液晶は通常ネマチック液晶にコレステリック液晶
又は光学活性物質を混入するとともに少なくとも一種の
多色性色素を混入する。Cholesteric liquid crystal having positive dielectric anisotropy is injected into the cell thus formed and sealed. This cholesteric liquid crystal is usually made by mixing a cholesteric liquid crystal or an optically active substance into a nematic liquid crystal and also mixing at least one kind of pleochroic dye.
この表示素子は、最も単純な構造を示したが、セル中に
仕切壁を設け２種の液晶を封入する、２層以上の多層セ
ルとする、入側基板に文字等の印刷をする、カラーフィ
ルター、紫外線カットフィルター等を積層する等して表
示に多様性をもたせることもできる。This display element showed the simplest structure, but it had a partition wall inside the cell and sealed two types of liquid crystals, it was a multilayer cell with two or more layers, it had characters printed on the input substrate, it had color It is also possible to add diversity to the display by layering filters, ultraviolet cut filters, etc.
本発明の偏光板は通用の特定方向の光のみをよく透過す
る偏光板であれば使用でき、カラー偏光板を使用しても
良い。The polarizing plate of the present invention can be used as long as it is a polarizing plate that can easily transmit only common light in a specific direction, and a color polarizing plate can also be used.
また、背後照明の光源として、理想的な白色光源が得ら
れれば良いが、タングステンランプ等を用いると赤に近
い光の成分を多く含んだ光となり、表示色の変色を起こ
すだめ表示振子としての品位を損うことになる。そのた
めには色補正フィルターを用いることは良く知られたこ
とである。この他、光源の大きによっては、表示素子を
充分に照明できなくなるため、表示に色むら（照明むら
）を生ずる。これを防ぐため、光源に反射板や拡散部乱
世を用い均一な照明を得ることができる。このとき拡散
散乱板の機能として、色補正フイルターの機能も兼ねる
ことかできれば素子構成が簡素になる。In addition, as a light source for backlighting, it would be good if an ideal white light source could be obtained, but if a tungsten lamp or the like is used, the light will contain a lot of light components close to red, which will cause discoloration of the display color and will not be used as a display pendulum. It will damage your dignity. It is well known that color correction filters are used for this purpose. In addition, depending on the size of the light source, the display element cannot be sufficiently illuminated, resulting in color unevenness (illumination unevenness) in the display. To prevent this, uniform illumination can be obtained by using a reflector or a diffuser for the light source. At this time, if the diffuse scattering plate can also function as a color correction filter, the element configuration will be simplified.
第１図は、本発明の代表的例の斜視図であり、水平配向
処理され誘電異方性が正のコレステリック液晶を封入し
た表示素子（１）の後方に、半透過反射板（２）、偏光
板（３）、照明ランプ（６）が配されたものであり、ラ
ンプの色補正用のフィルター（４）、光の拡散散乱板（
５）、反射板（７）が設けられている。FIG. 1 is a perspective view of a typical example of the present invention, in which a transflective plate (2), a transflective plate (2), It is equipped with a polarizing plate (3), an illumination lamp (6), a filter for color correction of the lamp (4), and a light diffusion scattering plate (
5) A reflecting plate (7) is provided.
実施例
メルク社製ネマチック液晶ＺＴ、Ｉ−１２８５にコレス
テリックナノネートを３ｗｔ％ゲスト色素としてメルク
社製色素Ｄ−３７を２ｗｔ％添加し、よく加熱溶解し攪
拌した後、セルキャップ８μのアンチパララビング処理
されたセルに注入し、表示セルを形成した。また、半透
過反射板にはＴｉ０２粒子をアクリル柄脂に混入し、ギ
ヤステイング法にて作製した厚さ１．５ｍｍのものを、
偏光板には三立社製のＬＣ２−８１−１８をその偏光軸
がセルのラビング方向と一致するように半透過反射板の
光源側に設置し、背後照明にはタングステンランプを用
い、表示装置を形成した。Example: To nematic liquid crystal ZT, I-1285 manufactured by Merck & Co., 2 wt% of cholesteric nanonate as a guest dye, D-37 manufactured by Merck & Co., Ltd. was added, and after thoroughly heating and dissolving and stirring, anti-pararubbing with a cell cap of 8μ was performed. The treated cells were injected to form display cells. In addition, the semi-transparent reflector was made with a thickness of 1.5 mm by mixing Ti02 particles into acrylic pattern resin and using the gear steering method.
As a polarizing plate, LC2-81-18 manufactured by Sanritsusha was installed on the light source side of the semi-transparent reflector so that its polarization axis coincided with the rubbing direction of the cell. A tungsten lamp was used for back illumination, and the display device was Formed.
このときの表示外観をその完色度で評価すると表−１の
よつな結果が得られた。比較対照のため偏光板を用いな
い場合についても記した。When the display appearance at this time was evaluated by its degree of color perfection, the results shown in Table 1 were obtained. For comparison purposes, a case in which no polarizing plate was used was also described.
実施例に示したように、半透過反射板がある程度偏光度
を保持すれば着色度の低下を防ぎ、その表示品位を保つ
ことがわかった。半透過反射板としては、実施例の他に
、プラスチック又はガラスのような透明な基板上にアル
ミ等の光反射性の材料を、スホツト状にコーティングし
たもの、又は逆にスポット状に非コーテイング部分を設
けたもの、更にこれらの基板中に光散乱性粒子を混合し
たもの、あるいは、基板表面に凹凸を設け、光散乱性を
与えたもの、更にば又基板表面に光散乱性を有する粒子
を固着されたもの等、またはプラスチックスの多孔体で
あって比較的光散乱の小さいもの等がある。As shown in the examples, it was found that if the transflector plate maintains the degree of polarization to a certain extent, the degree of coloring can be prevented from decreasing and the display quality can be maintained. In addition to the examples, the transflective plate may also include a transparent substrate such as plastic or glass coated with a light reflective material such as aluminum in spots, or a spot-shaped non-coated portion. In addition, these substrates have light-scattering particles mixed in them, or the substrate surface is provided with irregularities to give it light-scattering properties, and furthermore, the substrate surface has light-scattering particles added to it. There are those that are fixed, or those that are porous plastics that have relatively low light scattering.
また、タイナミツクスキャッタリングやフォーカルコニ
ック等の光散乱状態の液晶セルを反射板として用いても
良く、この場合、透過表示を行なうときは電気的にその
光散乱状態を抑えて透明な状態に変えてやれば、受光反
射型、透過型表示の使い分けが可能となる。In addition, a liquid crystal cell in a light scattering state such as dynamic scattering or focal conic may be used as a reflector. In this case, when performing transmission display, the light scattering state is electrically suppressed and changed to a transparent state. By doing so, it becomes possible to use either a light-receiving/reflective type display or a transmissive type display.
第１図に本表示装置の基本的構成を示した。FIG. 1 shows the basic configuration of this display device.
以上の如く本発明による表示装置は、同一セルにて、透
過型、反射型の区別なく見安さを保証し、単独で又は、
他の材料と併用して、種々の応用が可能であり、電卓、
時計、各種測定器、ゲーム機、車内等の表示、オーディ
オ、その他家電製品用の表示器等として応用可能なもの
である。As described above, the display device according to the present invention guarantees easy viewing regardless of whether it is a transmissive type or a reflective type in the same cell, and can be used alone or
Can be used in combination with other materials for various applications, such as calculators,
It can be applied as a display for watches, various measuring instruments, game consoles, car interiors, audio, and other home appliances.
第１図は本発明の液晶表示装置の説明のための構成模式
図である。
１：ゲスト−ホスト液晶表示素子
２：半透過反射板
３：偏光板
４：色補正フィルター
５：拡散散乱板
６：背後照明ランプ
７：反射板FIG. 1 is a schematic structural diagram for explaining the liquid crystal display device of the present invention. 1: Guest-host liquid crystal display element 2: Transflective plate 3: Polarizing plate 4: Color correction filter 5: Diffusing scattering plate 6: Back illumination lamp 7: Reflecting plate
Claims (1)
の電極基板を相対向して、セルを形成し、該セルに多色
性色素を含有した誘電異方性が正のコレステリック液晶
を封入した表示素子と、その後に配された半透過反射板
、偏光板、背後照明光源とから成ることを特徴とする液
晶表示素子。A display in which a pair of electrode substrates with at least one substrate electrode surface subjected to horizontal alignment treatment are opposed to each other to form a cell, and a cholesteric liquid crystal with positive dielectric anisotropy containing a pleochroic dye is sealed in the cell. 1. A liquid crystal display device comprising a device, a transflective plate, a polarizing plate, and a back illumination light source arranged after the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56132108A JPS5834432A (en) | 1981-08-25 | 1981-08-25 | Liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56132108A JPS5834432A (en) | 1981-08-25 | 1981-08-25 | Liquid crystal display element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5834432A true JPS5834432A (en) | 1983-02-28 |
| JPH0230489B2 JPH0230489B2 (en) | 1990-07-06 |
Family
ID=15073624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56132108A Granted JPS5834432A (en) | 1981-08-25 | 1981-08-25 | Liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5834432A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59195224A (en) * | 1983-03-29 | 1984-11-06 | ゼロツクス・コ−ポレ−シヨン | Multicolor liquid crystal display |
| JPS59195628A (en) * | 1983-04-20 | 1984-11-06 | コンシグリオ・ナチオナ−レ・デレ−・リサ−チ | Liquid crystal device |
| JPS6117102A (en) * | 1984-07-04 | 1986-01-25 | Alps Electric Co Ltd | Transmission type color liquid crystal display device |
| JPS61198929U (en) * | 1985-05-31 | 1986-12-12 | ||
| JPS62204288A (en) * | 1986-03-05 | 1987-09-08 | 株式会社日立製作所 | Liquid crystal lighting apparatus |
| JPS63185121U (en) * | 1987-05-20 | 1988-11-29 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53100263A (en) * | 1977-02-14 | 1978-09-01 | Toshiba Corp | Liquid crystal color display device |
| JPS54141150A (en) * | 1978-04-26 | 1979-11-02 | Toshiba Corp | Liquid crystal display device |
| JPS5552025A (en) * | 1978-10-12 | 1980-04-16 | Toshiba Corp | Liquid crystal display element |
| JPS5573023A (en) * | 1978-11-27 | 1980-06-02 | Seiko Epson Corp | Liquid crystal color display body |
-
1981
- 1981-08-25 JP JP56132108A patent/JPS5834432A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53100263A (en) * | 1977-02-14 | 1978-09-01 | Toshiba Corp | Liquid crystal color display device |
| JPS54141150A (en) * | 1978-04-26 | 1979-11-02 | Toshiba Corp | Liquid crystal display device |
| JPS5552025A (en) * | 1978-10-12 | 1980-04-16 | Toshiba Corp | Liquid crystal display element |
| JPS5573023A (en) * | 1978-11-27 | 1980-06-02 | Seiko Epson Corp | Liquid crystal color display body |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59195224A (en) * | 1983-03-29 | 1984-11-06 | ゼロツクス・コ−ポレ−シヨン | Multicolor liquid crystal display |
| JPH0511293B2 (en) * | 1983-03-29 | 1993-02-15 | Xerox Corp | |
| JPS59195628A (en) * | 1983-04-20 | 1984-11-06 | コンシグリオ・ナチオナ−レ・デレ−・リサ−チ | Liquid crystal device |
| JPS6117102A (en) * | 1984-07-04 | 1986-01-25 | Alps Electric Co Ltd | Transmission type color liquid crystal display device |
| JPS61198929U (en) * | 1985-05-31 | 1986-12-12 | ||
| JPS62204288A (en) * | 1986-03-05 | 1987-09-08 | 株式会社日立製作所 | Liquid crystal lighting apparatus |
| JPS63185121U (en) * | 1987-05-20 | 1988-11-29 | ||
| JPH0526574Y2 (en) * | 1987-05-20 | 1993-07-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0230489B2 (en) | 1990-07-06 |
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