JPS5828722A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPS5828722A JPS5828722A JP56126924A JP12692481A JPS5828722A JP S5828722 A JPS5828722 A JP S5828722A JP 56126924 A JP56126924 A JP 56126924A JP 12692481 A JP12692481 A JP 12692481A JP S5828722 A JPS5828722 A JP S5828722A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- film
- crystal display
- display element
- films
- 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
- G02F1/133345—Insulating layers
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)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はガラス基板に金属酸化物よりなる下地膜を形成
してなる液晶表示素子の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a liquid crystal display element formed by forming a base film made of a metal oxide on a glass substrate.
従来、一般に液晶表示素子は第１図に示すような構造を
有し、ガラス基板１．１′上に酸化スズ（ＳｎＯ２）ま
たは酸化インジウム（Ｉｎ２（Ｉｓ）等の透明導電膜か
らなる電極パターン２．２′を設け、その上に液晶を一
定の方向に整列せしめる液晶配向制御膜（又は絶縁膜）
３．３’を形成し、これによって液晶４をツイスト・ネ
マティック型に配向するとともに固定保持し、周辺部を
シール５によって封止している。液晶を一定の方向に整
列せしめる液晶配向制御膜（又は絶縁膜）には酸化ケイ
素（ＳｉＯ２）等の無機質膜が用いられるほか、ポリイ
ミド不才たはラダー型オルガノ・シリコン・ポリマー等
の有機高分子膜が用いられる。この中で特に有機高分子
膜を液晶配向制御膜として用いた場合には有機高分子膜
自身のもつ吸湿性のために高温高湿雰囲気中に長時間放
置した後点灯すると、透明電極近傍での沿面抵抗が低下
している為に透明電極近傍の液晶分子をも点灯状態にし
てしまう、所謂、電極セグメント間の９くっつき〃。Conventionally, a liquid crystal display element generally has a structure as shown in FIG. .2', and a liquid crystal alignment control film (or insulating film) on which the liquid crystals are aligned in a certain direction.
3.3' is formed, whereby the liquid crystal 4 is oriented in a twisted nematic type and fixedly held, and the peripheral portion is sealed with a seal 5. Inorganic films such as silicon oxide (SiO2) are used for the liquid crystal alignment control film (or insulating film) that aligns liquid crystals in a certain direction, as well as organic polymers such as polyimide or ladder-type organo-silicon polymers. A membrane is used. Among these, especially when an organic polymer film is used as a liquid crystal alignment control film, due to the hygroscopicity of the organic polymer film itself, if it is turned on after being left in a high temperature and high humidity atmosphere for a long time, it may cause damage near the transparent electrode. Since the creeping resistance is reduced, the liquid crystal molecules near the transparent electrodes are also turned on, which is the so-called 9 adhesion between electrode segments.
やＮにじみ〃を生じる欠点があった。その為、第２図に
示す様にガラス基板１．１′と透明電極パターン２．２
′または液晶配向制御膜３．３′との界面に、酸化ケイ
素、酸化アルミニウム、酸化チタン等の金属酸化物から
なる下地膜６．６′を設けて、上記ゝくっつき“やゝに
じみ〃といった不良を防止していた。しかし、従来この
ような目的に使用される下地膜の膜厚けせいぜい５００
〜１５００Ａ程度であり、また、その目的も有機高分子
膜を液晶配向膜として用いた場合に生じる電極セグメン
ト間のゝくっつき“やゝゝにじみ”を防止するというも
のであった０
本発明は、とくにガラス基板に形成される金属酸化物よ
りなる下地膜の膜厚を３００ＯＡ以上に形成することに
よって高い信頼性を有する液晶表示素子を得ることを目
的としている。This had the disadvantage of causing smearing and N smearing. Therefore, as shown in Figure 2, a glass substrate 1.1' and a transparent electrode pattern 2.2 are used.
Or, a base film 6.6' made of metal oxide such as silicon oxide, aluminum oxide, titanium oxide, etc. is provided at the interface with the liquid crystal alignment control film 3.3' to prevent defects such as the above-mentioned "sticking" and "bleeding". However, the thickness of the base film conventionally used for this purpose was 500 mm at most.
~1500A, and its purpose was to prevent "sticking" and "bleeding" between electrode segments that occur when an organic polymer film is used as a liquid crystal alignment film. In particular, the object is to obtain a highly reliable liquid crystal display element by forming a base film made of a metal oxide formed on a glass substrate to a thickness of 300 OA or more.
即ち、酸化ケイ素、酸化アルミニウム、酸化チタン等の
金属酸化物よりなる下地膜を３００ＯＡ以上に形成する
ことにより、無機系液晶配向制御膜を用いた液晶表示素
子において、高温高湿雰囲気中に長時間放置したときに
顕著にみられる誘起ドメインの発生、或いは液晶相が等
方性状態を示すときに通電試験を行うと誘起ドメインを
発生することが防止できるＯまた、直流電圧を印加した
場合にみられる酸化スズ（ＳｎＯｚ）又は酸化インジウ
ム（Ｉｎｋｓ）等からなる透明電極の破壊現象、さらに
は高温条件下での気泡の発生が改善できる。That is, by forming a base film made of a metal oxide such as silicon oxide, aluminum oxide, titanium oxide, etc. to a thickness of 300 OA or more, a liquid crystal display element using an inorganic liquid crystal alignment control film can be exposed to a high temperature and high humidity atmosphere for a long time. It is possible to prevent the generation of induced domains that are noticeable when the liquid crystal is left standing, or to conduct an electric current test when the liquid crystal phase is in an isotropic state. It is possible to improve the destruction phenomenon of transparent electrodes made of tin oxide (SnOz) or indium oxide (Inks), etc., as well as the generation of bubbles under high-temperature conditions.
また有機系配向制御膜を用いた液晶表示素子においては
高温高湿雰囲気中に長時間放置した後点灯（ｑ）
したときに見られる電極セグメントのゝくっつき“や＼
＼にじみ〃についてもその発生時間を延長させることが
できる。金属酸化物よりなる下地膜の膜厚を厚くすると
液晶配向制御膜の構造をシールの内側に設ける、所謂「
Ｏ１己構造」としなくても、シールの外部に１で設ける
、所謂「Ｗｈ ｏ ］ ｅ構造化」できることが可能と
なり（第３図参照）、シール付近の液晶分子の配向力を
改善することができる。In addition, in liquid crystal display devices using organic alignment control films, "sticking" of electrode segments, which can be seen when the display is turned on (q) after being left in a high temperature and high humidity atmosphere for a long period of time, may occur.
The occurrence time of \bleeding can also be extended. When the thickness of the base film made of metal oxide is increased, the structure of the liquid crystal alignment control film is provided inside the seal.
It is now possible to create a so-called "Who] e structure" by providing 1 outside the seal without having to create a "O1 self-structure" (see Figure 3), and it is possible to improve the alignment force of liquid crystal molecules near the seal. can.
以下、本発明の液晶表示素子の一実施例について説明す
る。Hereinafter, one embodiment of the liquid crystal display element of the present invention will be described.
実施例
ソーダガラス基板をアルコールを主体とする溶剤に水酸
化シリコンを希釈した溶液中に浸漬し、引き上げた後、
１５０℃で焼成１〜、約１５００Ａの酸化ケイ素膜を形
成する。これをさらに前記溶液中に浸漬し、引き上げた
後、５００℃で焼成し、約３０００Ａの酸化ケイ素膜を
形成した後に透明電極を形成し、その上に１．００ＯＡ
の有機系液晶配向制御膜を［Ｗｈ ｏ ］ ｅ構造」に
形成し、液晶を介在してとれを２枚平行に配置し、周辺
部をシール材で封止して液晶表示素子とする０上記構造
を有する液晶表示素子を８０℃−９５％ＲＨ雰囲気中に
１００時間放置した後、点灯して一一にじみ“の発生の
有無を調べる。また１００℃の高温雰囲気中に２５００
時間放置し気泡発生の有無および誘起ドメインの発生の
有無を調べる。Example A soda glass substrate was immersed in a solution of silicon hydroxide diluted in an alcohol-based solvent, and then pulled up.
Firing at 150° C. 1 to form a silicon oxide film of approximately 1500 A. This was further immersed in the solution, pulled up, and fired at 500°C to form a silicon oxide film of about 3000A, and then a transparent electrode was formed on it, and a 1.00A silicon oxide film was formed on it.
An organic liquid crystal alignment control film is formed into a [Wh o ] e structure, two strips are arranged in parallel with a liquid crystal interposed in between, and the peripheral part is sealed with a sealing material to form a liquid crystal display element. After leaving the liquid crystal display element having the structure in a 80°C - 95% RH atmosphere for 100 hours, it is turned on to check for the occurrence of "bleeding".
Leave to stand for a period of time and check whether bubbles are generated or not and whether induced domains are generated.
第４図は、実施例と同様の方法で酸化ケイ素よりなる下
地膜を５０ＯＡ、１００ＯＡ、１５００Ａの膜厚に形成
した液晶表示素子を作製し、実施例と同様の試験を行い
、その結果を示すものである０図から明らかなように、
本発明の液晶表示素子によれば、液晶の種類に拘らず、
下地膜の膜厚の厚い、とくに３０００＾以上形成したも
のはすべて良好な結果を示し、高い信頼性が得られる０FIG. 4 shows the results of fabricating liquid crystal display elements in which base films made of silicon oxide were formed to thicknesses of 50 OA, 100 OA, and 1500 Å using the same method as in Examples, and tests similar to those in Examples. As is clear from Figure 0,
According to the liquid crystal display element of the present invention, regardless of the type of liquid crystal,
All films with a thick base film, especially those formed with a thickness of 3000^ or more, show good results, and high reliability can be obtained.
第１図は従来の下地膜を有しない液晶表示素子の断面図
、第２図は本発明に係る下地膜を有するｒｏｕｔ構造」
の液晶表示素子の断面図、第３図は本発明に係名下地膜
を有するｒ Ｗｈ ｏ ｌ ｅ構造」図中、■、１′
ガラス基板、２．２’：透明電極パターン、３．３’
：液晶配向制御膜、４：液晶、５：シール、６，６′
下地膜
代理人 弁理士 福 士 愛 彦Figure 1 is a cross-sectional view of a conventional liquid crystal display element without a base film, and Figure 2 is a rout structure with a base film according to the present invention.
FIG. 3 is a cross-sectional view of a liquid crystal display element according to the present invention.
Glass substrate, 2.2': Transparent electrode pattern, 3.3'
: Liquid crystal alignment control film, 4: Liquid crystal, 5: Seal, 6, 6'
Base film agent Patent attorney Aihiko Fukushi
Claims (1)
てなる液晶表示素子において、上記下地膜の膜厚を３０
００Ａ以上に形成してなる液晶表示素子。1. In a liquid crystal display element formed by forming a base film made of a metal oxide on a glass substrate, the film thickness of the base film is 30 mm.
A liquid crystal display element formed with a voltage of 00A or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56126924A JPS5828722A (en) | 1981-08-12 | 1981-08-12 | Liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56126924A JPS5828722A (en) | 1981-08-12 | 1981-08-12 | Liquid crystal display element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5828722A true JPS5828722A (en) | 1983-02-19 |
Family
ID=14947264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56126924A Pending JPS5828722A (en) | 1981-08-12 | 1981-08-12 | Liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5828722A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0459759A2 (en) * | 1990-06-01 | 1991-12-04 | Seiko Epson Corporation | Liquid crystal display |
-
1981
- 1981-08-12 JP JP56126924A patent/JPS5828722A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0459759A2 (en) * | 1990-06-01 | 1991-12-04 | Seiko Epson Corporation | Liquid crystal display |
| EP0459759A3 (en) * | 1990-06-01 | 1992-03-18 | Seiko Epson Corporation | Liquid crystal display |
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