JPH02211424A - Production of liquid crystal electrooptical element - Google Patents
Production of liquid crystal electrooptical elementInfo
- Publication number
- JPH02211424A JPH02211424A JP3312789A JP3312789A JPH02211424A JP H02211424 A JPH02211424 A JP H02211424A JP 3312789 A JP3312789 A JP 3312789A JP 3312789 A JP3312789 A JP 3312789A JP H02211424 A JPH02211424 A JP H02211424A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- substrate
- rubbing
- orientation
- substrates
- 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 35
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000000758 substrate Substances 0.000 claims abstract description 34
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 abstract description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000007598 dipping method Methods 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000004988 Nematic liquid crystal Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- -1 carboxylic acid chromate Chemical class 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- UBLLBVMXMHIROA-UHFFFAOYSA-K chromium(3+) tetradecanoate Chemical compound [Cr+3].CCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCC([O-])=O UBLLBVMXMHIROA-UHFFFAOYSA-K 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000002964 rayon Substances 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] 本発明は液晶電気光学素子の製造方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for manufacturing a liquid crystal electro-optical element.
[従来の技術]
従来のECBモードを利用した液晶電気光学素子は、第
2図に示しす如く対向する2枚の電極基板間に液晶を挟
持した液晶セル3と、この液晶セルを挟んで両側に配置
した偏光板1.4とから成り立っている。また、特に視
角補償のため、上記液晶以外の光学的異方体2を備える
こともある。[Prior Art] As shown in FIG. 2, a liquid crystal electro-optical device using the conventional ECB mode includes a liquid crystal cell 3 in which a liquid crystal is sandwiched between two electrode substrates facing each other, and a liquid crystal cell 3 on both sides with this liquid crystal cell in between. It consists of a polarizing plate 1.4 arranged at In addition, an optically anisotropic body 2 other than the above liquid crystal may be provided especially for viewing angle compensation.
液晶セルの液晶分子の配向け、第1の基板31、第2の
基板32のいずれの側においても、ホメオトロピック配
向に近いチルト配向であり、そのプレチルト角36は基
板法線方向からおよそ0.5゜〜3.0@に設定される
。このように、完全なホメオトロピック配向にせずに一
定のプレチルト角を与えているのは、液晶セルに電圧が
印加された際に、液晶分子をある決まった方向に倒すこ
とを目的としている。The orientation of the liquid crystal molecules in the liquid crystal cell, on either side of the first substrate 31 or the second substrate 32, is a tilt alignment close to homeotropic alignment, and the pretilt angle 36 is approximately 0.0 degrees from the normal direction of the substrates. It is set between 5° and 3.0@. The purpose of providing a constant pretilt angle without achieving complete homeotropic alignment is to tilt the liquid crystal molecules in a certain direction when a voltage is applied to the liquid crystal cell.
[発明が解決しようとする課題]
しかし、従来の液晶電気光学素子の製造方法には、基板
の法線方向から0.5°〜3.0°程度のプレチルト角
を与えるために、高度な配向技術を必要とする点に問題
があった。このようなプレチルト角は、一般には培風館
発行「液晶応用編」(1985年初版)の61ページに
も紹介されているように、SiO等の斜方蒸着の後、垂
直配向剤を塗布するという手段で得ることが出来る。し
かしながら、SiO等の斜方蒸着は量産性が悪く、均一
でしかも大きな液晶光学素子を得ることは困難であった
。そこで本発明では、量産性の悪いSio等の斜方蒸着
膜を使用せずに透明電極上に垂直配向剤を塗布してから
ラビングすることによって、従来のSiO等の斜方蒸着
膜を用いたをときと同等の配向状態を得るものであり、
しかも従来法では困難で有った量産性、均一性の優れた
配向を得ることを目的とするものである。[Problems to be Solved by the Invention] However, in the conventional manufacturing method of liquid crystal electro-optical elements, a high degree of alignment is required in order to give a pretilt angle of about 0.5° to 3.0° from the normal direction of the substrate. The problem was that it required technology. Such a pretilt angle is generally achieved by applying a vertical alignment agent after oblique evaporation of SiO, etc., as introduced on page 61 of "Liquid Crystal Application Edition" published by Baifukan (first edition, 1985). You can get it at However, oblique evaporation of SiO or the like has poor mass productivity, making it difficult to obtain uniform and large liquid crystal optical elements. Therefore, in the present invention, instead of using an obliquely evaporated film such as SIO, which is difficult to mass-produce, by applying a vertical alignment agent on the transparent electrode and then rubbing, it is possible to use a conventional obliquely evaporated film such as SiO. obtains the same orientation state as when
Furthermore, the purpose of this method is to achieve mass production and to achieve orientation with excellent uniformity, which has been difficult with conventional methods.
[課題を解決するための手段]
本発明の液晶電気光学素子の製造方法は、少なくとも、
透明電極を備えた第1の基板と、透明電極を備えた第2
の基板と、前記2枚の基板間に挟まれた液晶と、それら
を挟んで両側に配置された一対の偏光板からなる液晶光
学素子において、前記液晶セルの第1の基板と第2の基
板の少なくともどちらかの基板が垂直配向処理を行なっ
てからラビングしたものであることを特徴とする。[Means for Solving the Problems] The method for manufacturing a liquid crystal electro-optical element of the present invention includes at least the following steps:
a first substrate with a transparent electrode; a second substrate with a transparent electrode;
A liquid crystal optical element comprising a substrate, a liquid crystal sandwiched between the two substrates, and a pair of polarizing plates disposed on both sides with the two substrates sandwiched between the first substrate and the second substrate of the liquid crystal cell. The invention is characterized in that at least one of the substrates is subjected to vertical alignment treatment and then rubbed.
[実施例] 以下、実施例により本発明の詳細を示す。[Example] Hereinafter, the details of the present invention will be shown by examples.
第1図に、本発明の実施例に於ける液晶電気光学素子の
断面図を示す。図中、1は上側偏光板、3は液晶セル、
4は下側偏光板である。FIG. 1 shows a cross-sectional view of a liquid crystal electro-optical element in an embodiment of the present invention. In the figure, 1 is an upper polarizing plate, 3 is a liquid crystal cell,
4 is a lower polarizing plate.
2枚の偏光板は、その吸収軸が互いに直交したクロスニ
フルの関係にある。また、上側偏光板の吸収軸方向は、
隣接する液晶セルの第1の基板のラビング方向と45@
の角度をなしている。The two polarizing plates are in a cross-niffle relationship with their absorption axes orthogonal to each other. In addition, the absorption axis direction of the upper polarizing plate is
Rubbing direction of first substrate of adjacent liquid crystal cell and 45@
It forms an angle of .
液晶セルの第1の基板31と第2の基板32は垂直配向
処理を行なってからラビングしたものである。 垂直
配向処理は垂直配向処理剤として有機チタネート混合物
をフロンに溶かしたものをディッピングにより塗布、焼
成することによって行なった。垂直配向処理剤とし′C
は有機チタネート混合物の代わりにミリスチン酸クロム
錯体等の一塩基性カルボン酸クロム酸錯体を用いても同
様なものが作成可能であった。The first substrate 31 and the second substrate 32 of the liquid crystal cell are subjected to vertical alignment treatment and then rubbed. The vertical alignment treatment was carried out by dipping an organic titanate mixture dissolved in chlorofluorocarbon as a vertical alignment treatment agent, followed by baking. Vertical alignment treatment agent
A similar product could be prepared by using a monobasic carboxylic acid chromate complex such as a chromium myristate complex instead of an organic titanate mixture.
次に、垂直配向処理を行なった基板表面をラビングした
。ラビングはさらし布を用いた固定ラビングで30kg
の加重をかけて4回擦った。ラビング方向は第1の基板
と第2の基板で逆方向になるように、すなわちツイスト
角が00になるように設定した。ラビング方法はさらし
布の固定ラビングの代わりにレーヨンやナイロン等を用
いた回転ラビングでも同様なものが作成可能であった。Next, the surface of the substrate that had been subjected to the vertical alignment treatment was rubbed. The rubbing is fixed rubbing using a bleached cloth and weighs 30 kg.
I rubbed it 4 times under a certain amount of pressure. The rubbing direction was set to be opposite between the first substrate and the second substrate, that is, the twist angle was set to 00. As for the rubbing method, a similar product could be created by rotating rubbing using rayon, nylon, etc. instead of fixed rubbing using a bleached cloth.
このようにして作成した基板上ではほぼ完全なホメオト
ロピック配向を得た。Almost perfect homeotropic alignment was obtained on the substrate prepared in this way.
液晶35としては、メルク社製のZLエニー318を用
いた。この液晶は特にECB用として開発されたΔε=
−2,0のn型ネマチック液晶である。複屈折率Δn=
0.1243である、セルギャップdを5.6μmに設
定した。As the liquid crystal 35, ZL Any 318 manufactured by Merck & Co., Ltd. was used. This liquid crystal was developed especially for ECB.
-2.0 n-type nematic liquid crystal. Birefringence Δn=
The cell gap d, which is 0.1243, was set to 5.6 μm.
このようにして作成した液晶電気光学素子のコントラス
ト比は、セル法線方向でおよそ1:80であり、全体に
均一で良好なコントラスト比が得られた。The contrast ratio of the liquid crystal electro-optical element thus produced was approximately 1:80 in the cell normal direction, and a uniform and good contrast ratio was obtained throughout.
[発明の効果]
以上述べたように本発明によれば、従来困難であったホ
メオトロピック配向に近いチルト配向を均一にしかも広
範囲に得られる効果を有する。[Effects of the Invention] As described above, according to the present invention, it is possible to uniformly obtain tilt alignment close to homeotropic alignment and over a wide range, which has been difficult in the past.
第1図は、本発明の実施例における液晶電気光学素子の
断面図を表す図であり、第2図は従来の液晶電気光学素
子の断面図を表す図である。
1、上側偏光板
2、光学的異方体
3、液晶セル
4、下側偏光板
31、第1の基板
32、第2の基板
33、透明電極
34、SiO斜方蒸着膜
35.0型ネマチツク液晶
36、液晶分子のプレチルト角
以上FIG. 1 is a cross-sectional view of a liquid crystal electro-optical element according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a conventional liquid crystal electro-optical element. 1. Upper polarizing plate 2, optically anisotropic body 3, liquid crystal cell 4, lower polarizing plate 31, first substrate 32, second substrate 33, transparent electrode 34, SiO oblique evaporation film 35.0 type nematic Liquid crystal 36, pre-tilt angle of liquid crystal molecules or more
Claims (1)
を備えた第2の基板と、前記2枚の基板間に挟まれた液
晶と、それらを挟んで両側に配置された一対の偏光板か
らなる液晶光学素子において、前記液晶セルの第1の基
板と第2の基板の少なくともどちらかの基板が垂直配向
処理を行なつてからラビングしたものであることを特徴
とする液晶電気光学素子の製造方法。At least a first substrate provided with a transparent electrode, a second substrate provided with a transparent electrode, a liquid crystal sandwiched between the two substrates, and a pair of polarizing plates disposed on both sides of the substrate. A liquid crystal electro-optical element characterized in that at least one of the first substrate and the second substrate of the liquid crystal cell is subjected to vertical alignment treatment and then rubbed. Production method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3312789A JPH02211424A (en) | 1989-02-13 | 1989-02-13 | Production of liquid crystal electrooptical element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3312789A JPH02211424A (en) | 1989-02-13 | 1989-02-13 | Production of liquid crystal electrooptical element |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02211424A true JPH02211424A (en) | 1990-08-22 |
Family
ID=12377947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3312789A Pending JPH02211424A (en) | 1989-02-13 | 1989-02-13 | Production of liquid crystal electrooptical element |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02211424A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6507381B1 (en) | 1997-05-26 | 2003-01-14 | Sharp Kabushiki Kaisha | Liquid crystal panel having tilted liquid crystal molecules and liquid crystal display using the liquid crystal panel |
JP2005031265A (en) * | 2003-07-09 | 2005-02-03 | Canon Inc | Liquid crystal display |
-
1989
- 1989-02-13 JP JP3312789A patent/JPH02211424A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6507381B1 (en) | 1997-05-26 | 2003-01-14 | Sharp Kabushiki Kaisha | Liquid crystal panel having tilted liquid crystal molecules and liquid crystal display using the liquid crystal panel |
JP2005031265A (en) * | 2003-07-09 | 2005-02-03 | Canon Inc | Liquid crystal display |
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