JPS6356625A - Liquid crystal device - Google Patents
Liquid crystal deviceInfo
- Publication number
- JPS6356625A JPS6356625A JP61199033A JP19903386A JPS6356625A JP S6356625 A JPS6356625 A JP S6356625A JP 61199033 A JP61199033 A JP 61199033A JP 19903386 A JP19903386 A JP 19903386A JP S6356625 A JPS6356625 A JP S6356625A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- transparent
- substrates
- static electricity
- crystal 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 50
- 239000000758 substrate Substances 0.000 claims abstract description 34
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 229910010272 inorganic material Inorganic materials 0.000 claims 1
- 239000011147 inorganic material Substances 0.000 claims 1
- 230000003068 static effect Effects 0.000 abstract description 16
- 230000005611 electricity Effects 0.000 abstract description 15
- 230000002411 adverse Effects 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 3
- 230000005684 electric field Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、液晶装置に関し、特に、基板に表面処理を施
した液晶装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal device, and particularly to a liquid crystal device whose substrate is surface-treated.
[開示の概要]
本明細書及び図面は、2枚の基板の間に液晶を挟持して
成る液晶装置において、少なくとも一方の透明基板の外
側の表面に導電性処理を施すことにより、静電気の影響
による誤動作を防止し、素子の安定性と耐久性を向上さ
せる技術を開示するものである。[Summary of the Disclosure] This specification and drawings disclose that in a liquid crystal device in which a liquid crystal is sandwiched between two substrates, the influence of static electricity is reduced by applying conductive treatment to the outer surface of at least one transparent substrate. The present invention discloses a technology that prevents malfunctions caused by the device and improves the stability and durability of the device.
[従来の技術]
近年、表示装置の分野で、液晶の進出は目覚ましいもの
がある。この種の液晶表示装置の典型的な一例を第3図
に示す、第3図において、液晶表示装置10は、2枚の
透明基板1a及び1bの間に液晶2を挟持し、それら基
板の外側には偏光板3が貼付され、液晶2に接する内側
には電極4及び配向膜5が形成されている。従来は、透
明基板1の外側や偏光板3の外側表面には、何らの処理
も施されていない、一方、液晶2の純度のアップを図る
と、電気抵抗は増大する0例えば、従来の時計、電卓等
の用途に用いられている液晶の電気抵抗は約IQIOΩ
cm程度であったが、最近では、IQII〜1QI2Ω
Cmの抵抗値を有する液晶材料も市販され、実際に使用
されてもいる。[Background Art] In recent years, liquid crystals have made remarkable advances in the field of display devices. A typical example of this type of liquid crystal display device is shown in FIG. 3. In FIG. 3, a liquid crystal display device 10 includes a liquid crystal 2 sandwiched between two transparent substrates 1a and 1b, and A polarizing plate 3 is attached to the panel, and an electrode 4 and an alignment film 5 are formed on the inner side in contact with the liquid crystal 2. Conventionally, no treatment has been applied to the outer surface of the transparent substrate 1 or the outer surface of the polarizing plate 3. On the other hand, when trying to improve the purity of the liquid crystal 2, the electrical resistance increases. The electrical resistance of liquid crystals used in calculators, etc. is approximately IQIOΩ.
cm, but recently IQII~1QI2Ω
Liquid crystal materials having a resistance value of Cm are also commercially available and are actually used.
[発明が解決しようとする問題点]
上記のような液晶表示装置に、外部から静電気が印加さ
れると、偏光板3の表面、又は偏光板3を使用しない場
合は透明基板lの表面が帯電し、偏光板3の表面又は透
明基板1の表面に静電荷が集まって、その電気力線は液
晶層を貫くことになる。通常、液晶表示装置は、正の誘
電異方性を有するネマチック液晶を基板に水平に配向さ
せて使用するため、一対の電極4の間に電界が印加され
なくても、この静電気だけで液晶が動作してしまうとい
う問題が生じていた。[Problems to be Solved by the Invention] When static electricity is applied from the outside to a liquid crystal display device as described above, the surface of the polarizing plate 3 or, if the polarizing plate 3 is not used, the surface of the transparent substrate l becomes charged. However, static charges gather on the surface of the polarizing plate 3 or the surface of the transparent substrate 1, and the lines of electric force penetrate the liquid crystal layer. Normally, a liquid crystal display device uses a nematic liquid crystal with positive dielectric anisotropy aligned horizontally on a substrate, so even if no electric field is applied between the pair of electrodes 4, this static electricity alone can cause the liquid crystal to flow. There was a problem with it not working.
これを第4図により定量的に説明する。第4図は、前記
一対の電極4の間がハイインピーダンスになっている場
合の等価回路図である。第4図において、透明基板lの
電気容量をCg、配向膜5の電気容量をG+、液晶2の
電気容量及び抵抗をCtC及びRLCとすると、液晶に
かかる電圧VtCは、透明基板lにかかる静電気の電圧
VSTに対して、次式の様になる。This will be explained quantitatively with reference to FIG. FIG. 4 is an equivalent circuit diagram when a high impedance exists between the pair of electrodes 4. In FIG. 4, if the capacitance of the transparent substrate l is Cg, the capacitance of the alignment film 5 is G+, and the capacitance and resistance of the liquid crystal 2 are CtC and RLC, the voltage VtC applied to the liquid crystal is the static electricity applied to the transparent substrate l. For the voltage VST, the following equation is obtained.
但し、
ここで、ガラス上に10KVの静電気が生じたものとし
、ガラス厚1.1am 、その誘電率2.5、配向膜厚
1000A、その誘電率3、液晶層厚1107p 、そ
の誘電率10としたとき、
よって、
即ち、液晶部分には約45Vの直流電圧が印加されるこ
とになり、素子の誤動作を招くばかりではなく、性能的
にも悪影響を与えることになる。また、静電気による電
界は、第4図における抵抗RLCにより、いいかえれば
液晶中の正負イオンの泳動によって消失し、液晶は電界
がない状態に戻るが、液晶の電気抵抗が高くなると、こ
の泳動の原因となっているイオン性物質の量が減少する
ために、長時間電界が保持されたままになり、液晶が動
作状態を保ちつづけることになる。従って、駆動信号に
この静電気を乗せた状態になっているため、結局は誤動
作になってしまう。However, here, it is assumed that 10 KV of static electricity is generated on the glass, the glass thickness is 1.1 am, its dielectric constant is 2.5, the alignment film thickness is 1000 A, its dielectric constant is 3, the liquid crystal layer thickness is 1107 p, and its dielectric constant is 10. In this case, a DC voltage of approximately 45 V will be applied to the liquid crystal portion, which will not only cause malfunction of the device but also have an adverse effect on performance. In addition, the electric field caused by static electricity disappears due to the resistance RLC in Figure 4, or in other words, due to the migration of positive and negative ions in the liquid crystal, and the liquid crystal returns to a state where there is no electric field. However, when the electrical resistance of the liquid crystal increases, this migration is caused Since the amount of ionic material that is present decreases, the electric field remains for a long time, and the liquid crystal continues to operate. Therefore, this static electricity is added to the drive signal, resulting in a malfunction.
本発明はこのような問題点に鑑みなされたもので、液晶
に対する静電気の悪影響を減少し、素子の安定性と耐久
性を向上させた液晶表示装置を提供することを目的とす
る。The present invention has been made in view of these problems, and an object of the present invention is to provide a liquid crystal display device in which the adverse effects of static electricity on liquid crystals are reduced and the stability and durability of the elements are improved.
[問題点を解決するための手段]
本発明において、上記の問題点を解決するために創案さ
れた装置は、2枚の基板の間に液晶を挟持し、該基板の
少なくとも一方が透明基板である液晶表示装置であって
、透明基板の外側の表面、あるいは外表面に貼付された
偏光板の表面に導電性処理が施されていることを特徴と
する液晶表示装置である。[Means for Solving the Problems] In the present invention, a device devised to solve the above problems has a liquid crystal sandwiched between two substrates, and at least one of the substrates is a transparent substrate. This is a liquid crystal display device characterized in that the outer surface of a transparent substrate or the surface of a polarizing plate attached to the outer surface is subjected to conductive treatment.
[作 用]
偏光板を使用しない場合は基板ガラスの外側に導電性処
理を施し、偏光板を用いる場合は偏光板の表面に導電性
処理を施して、それぞれ静電気を逃がす、それらの表面
抵抗は107オーム以下に抑え、高レベルの直流印加に
よる劣化を防止する。[Function] When not using a polarizing plate, conductive treatment is applied to the outside of the substrate glass, and when a polarizing plate is used, conductive treatment is applied to the surface of the polarizing plate to release static electricity.Their surface resistance is The resistance is suppressed to 107 ohms or less to prevent deterioration due to high level direct current application.
[実施例]
第1図は本発明を実施した液晶表示装置の構造の一例を
示す縦断面図である。第1図において、液晶表示装置1
00は、2枚の透明基板1a及び1bの間に液晶2を挟
持し、該透明基板1a及びlbの外側の表面に、導電性
処理として透明導電膜6a及び6bが形成されている0
、この透明導電膜6a及び6bにより、透明基板1a及
びlbの表面やその外方空中の塵等に発生する静電気は
解放される。なお、図中4は電極、5は配向膜、7はシ
ール材、8は導電ペーストである。[Example] FIG. 1 is a longitudinal sectional view showing an example of the structure of a liquid crystal display device embodying the present invention. In FIG. 1, a liquid crystal display device 1
In 00, a liquid crystal 2 is sandwiched between two transparent substrates 1a and 1b, and transparent conductive films 6a and 6b are formed on the outer surfaces of the transparent substrates 1a and 1b as conductive treatment.
The transparent conductive films 6a and 6b release static electricity generated on the surfaces of the transparent substrates 1a and 1b and dust in the air outside thereof. In the figure, 4 is an electrode, 5 is an alignment film, 7 is a sealing material, and 8 is a conductive paste.
第2図は本発明を実施した液晶表示装置の構造の他の一
例を示す縦断面図である。同図において、液晶表示装置
101は、2枚の透明基板1a及び1bの間に液晶2を
挟持し、その透明基板1a及び1bの外側の表面に偏光
板3a及び3bが貼付され、該偏光板3a及び3bの表
面に導電性処理として透明導電膜6a及び6bが形成さ
れている。この透明導電膜6a及び6bにより、偏光板
3a及び3bの表面や外方空中の塵等に発生する静電気
は解放される。なお、透明導電膜6a 。FIG. 2 is a longitudinal sectional view showing another example of the structure of a liquid crystal display device embodying the present invention. In the figure, a liquid crystal display device 101 has a liquid crystal 2 sandwiched between two transparent substrates 1a and 1b, and polarizing plates 3a and 3b are attached to the outer surfaces of the transparent substrates 1a and 1b. Transparent conductive films 6a and 6b are formed on the surfaces of 3a and 3b as conductive treatment. The transparent conductive films 6a and 6b release static electricity generated on the surfaces of the polarizing plates 3a and 3b and on dust in the air outside. Note that the transparent conductive film 6a.
6bの形成を、偏光板3a、3bを基板へ貼付する以前
に行っておくと、貼付作業時の静電気対策として大変有
効である。If the formation of the polarizing plates 6b is performed before attaching the polarizing plates 3a and 3b to the substrate, it is very effective as a countermeasure against static electricity during the attaching operation.
また、第1図及び第2図の実施例において、基板のいず
れか一方は透明基板でなくても差し支えない。その場合
、偏光板は普通、透明基板の側のみに配設されるが、本
発明の導電性処理は双方の外側に施されることが望まし
い。Furthermore, in the embodiments shown in FIGS. 1 and 2, one of the substrates may not be a transparent substrate. In that case, the polarizing plate is normally provided only on the side of the transparent substrate, but it is desirable that the conductive treatment of the present invention be applied to the outside of both sides.
さらに、各第1図及び第2図の実施例において、導電性
処理は界面活性剤をスプレーして被着させたものでもよ
く、あるいは、水酸基を有する無機系の静電防止剤を塗
布したものでもよい。但し1表面の電気抵抗は107オ
ーム程度以下とすべきである。Furthermore, in the embodiments shown in FIGS. 1 and 2, the conductive treatment may be applied by spraying a surfactant, or by applying an inorganic antistatic agent having a hydroxyl group. But that's fine. However, the electrical resistance of one surface should be about 107 ohms or less.
[発明の効果]
以上説明したように、本発明によれば、液晶に対する静
電気の悪影響を減少し、素子の安定性と耐久性を向上さ
せた液晶表示装置を得ることができる。#に、TFTや
MIXというアクティブ素子を備えたLCDの様に、電
気的にフローティング状態の電極を持った液晶素子には
有効である。[Effects of the Invention] As described above, according to the present invention, it is possible to obtain a liquid crystal display device in which the negative influence of static electricity on liquid crystal is reduced and the stability and durability of the element are improved. #: It is effective for liquid crystal elements having electrically floating electrodes, such as LCDs equipped with active elements such as TFTs and MIX.
第1図は本発明の液晶表示装置の一実施例の縦断面図、
第2図は本発明の他の実施例の縦断面図、第3図は従来
の液晶表示装置の構造の縦断面図、第4図は電極間の等
価回路図である。
la 、 lb :透明基板、2:液晶、3.3a、3
b:偏光板、4:電極、
5:配向膜、6a 、 6b :導電性処理部。FIG. 1 is a vertical cross-sectional view of an embodiment of the liquid crystal display device of the present invention;
FIG. 2 is a longitudinal sectional view of another embodiment of the present invention, FIG. 3 is a longitudinal sectional view of the structure of a conventional liquid crystal display device, and FIG. 4 is an equivalent circuit diagram between electrodes. la, lb: transparent substrate, 2: liquid crystal, 3.3a, 3
b: polarizing plate, 4: electrode, 5: alignment film, 6a, 6b: conductive treatment section.
Claims (6)
とも一方が透明基板である液晶装置において、透明基板
の外側の表面に導電性処理が施されていることを特徴と
する液晶装置。(1) A liquid crystal device in which a liquid crystal is sandwiched between two substrates, and at least one of the substrates is a transparent substrate, wherein the outer surface of the transparent substrate is subjected to conductive treatment. Device.
に導電性処理が施されていることを特徴とする特許請求
の範囲第1項に記載の液晶装置。(2) The liquid crystal device according to claim 1, wherein a polarizing plate is attached to the outer surface of the transparent substrate, and the surface is subjected to conductive treatment.
特許請求の範囲第1項又は第2項に記載の液晶装置。(3) The liquid crystal device according to claim 1 or 2, wherein the conductive treatment is a transparent conductive film.
特徴とする特許請求の範囲第1項又は第2項に記載の液
晶装置。(4) The liquid crystal device according to claim 1 or 2, wherein the conductive treatment is performed using a surfactant.
ものであることを特徴とする特許請求の範囲第1項又は
第2項に記載の液晶装置。(5) The liquid crystal device according to claim 1 or 2, wherein the conductive treatment is performed using an inorganic material having a hydroxyl group on the surface.
0^7オーム以下であることを特徴とする特許請求の範
囲第1項から第5項までのいずれか1項に記載の液晶装
置。(6) The electrical resistance of the surface that has been subjected to conductive treatment is 1
The liquid crystal device according to any one of claims 1 to 5, characterized in that the resistance is 0^7 ohm or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61199033A JPS6356625A (en) | 1986-08-27 | 1986-08-27 | Liquid crystal device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61199033A JPS6356625A (en) | 1986-08-27 | 1986-08-27 | Liquid crystal device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6356625A true JPS6356625A (en) | 1988-03-11 |
Family
ID=16400997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61199033A Pending JPS6356625A (en) | 1986-08-27 | 1986-08-27 | Liquid crystal device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6356625A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0385526A (en) * | 1989-08-30 | 1991-04-10 | Sharp Corp | Liquid crystal display device |
JPH0389422U (en) * | 1989-12-26 | 1991-09-12 | ||
JPH0437715A (en) * | 1990-06-01 | 1992-02-07 | Sharp Corp | Liquid crystal display device |
US5390059A (en) * | 1989-06-01 | 1995-02-14 | Hitachi, Ltd. | Flying head slider supporting mechanism having active air pressure control |
WO1997034188A1 (en) * | 1996-03-14 | 1997-09-18 | Seiko Epson Corporation | Liquid crystal device and electronic equipment |
EP0833187A1 (en) * | 1996-09-27 | 1998-04-01 | Toray Industries, Inc. | Liquid crystal display apparatus |
US6897918B1 (en) | 2000-09-15 | 2005-05-24 | Toray Industries, Inc. | Color filter with protrusion |
JP2007094295A (en) * | 2005-09-30 | 2007-04-12 | Optrex Corp | Liquid crystal display element |
US9000443B2 (en) | 2010-01-20 | 2015-04-07 | Semiconductor Energy Laboratory Co., Ltd. | Light-emitting device, flexible light-emitting device, electronic device, lighting apparatus, and method of manufacturing light-emitting device and flexible-light emitting device |
US9000442B2 (en) | 2010-01-20 | 2015-04-07 | Semiconductor Energy Laboratory Co., Ltd. | Light-emitting device, flexible light-emitting device, electronic device, and method for manufacturing light-emitting device and flexible-light emitting device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6028741B2 (en) * | 1975-12-24 | 1985-07-06 | イリノイ・ツ−ル・ワ−クス・インコ−ポレイテツド | plastic rotary cap |
-
1986
- 1986-08-27 JP JP61199033A patent/JPS6356625A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6028741B2 (en) * | 1975-12-24 | 1985-07-06 | イリノイ・ツ−ル・ワ−クス・インコ−ポレイテツド | plastic rotary cap |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5390059A (en) * | 1989-06-01 | 1995-02-14 | Hitachi, Ltd. | Flying head slider supporting mechanism having active air pressure control |
JPH0385526A (en) * | 1989-08-30 | 1991-04-10 | Sharp Corp | Liquid crystal display device |
JPH0389422U (en) * | 1989-12-26 | 1991-09-12 | ||
JPH0437715A (en) * | 1990-06-01 | 1992-02-07 | Sharp Corp | Liquid crystal display device |
US6346932B1 (en) | 1996-03-14 | 2002-02-12 | Seiko Epson Corporation | Liquid crystal device and electronic equipment |
WO1997034188A1 (en) * | 1996-03-14 | 1997-09-18 | Seiko Epson Corporation | Liquid crystal device and electronic equipment |
US6657608B2 (en) | 1996-03-14 | 2003-12-02 | Seiko Epson Corporation | Liquid crystal device and electronic equipment |
EP0833187A1 (en) * | 1996-09-27 | 1998-04-01 | Toray Industries, Inc. | Liquid crystal display apparatus |
US6525791B1 (en) | 1996-09-27 | 2003-02-25 | Toray Industries, Inc. | Color liquid crystal display apparatus for producing a display having a high contrast and a wide visual field angle |
EP1586938A1 (en) * | 1996-09-27 | 2005-10-19 | Toray Industries, Inc. | In-plane-switching (IPS) mode liquid crystal display having a patterned resin spacer |
US6897918B1 (en) | 2000-09-15 | 2005-05-24 | Toray Industries, Inc. | Color filter with protrusion |
JP2007094295A (en) * | 2005-09-30 | 2007-04-12 | Optrex Corp | Liquid crystal display element |
US9000443B2 (en) | 2010-01-20 | 2015-04-07 | Semiconductor Energy Laboratory Co., Ltd. | Light-emitting device, flexible light-emitting device, electronic device, lighting apparatus, and method of manufacturing light-emitting device and flexible-light emitting device |
US9000442B2 (en) | 2010-01-20 | 2015-04-07 | Semiconductor Energy Laboratory Co., Ltd. | Light-emitting device, flexible light-emitting device, electronic device, and method for manufacturing light-emitting device and flexible-light emitting device |
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