JPH01185617A - Boundary structure of liquid crystal panel - Google Patents
Boundary structure of liquid crystal panelInfo
- Publication number
- JPH01185617A JPH01185617A JP888188A JP888188A JPH01185617A JP H01185617 A JPH01185617 A JP H01185617A JP 888188 A JP888188 A JP 888188A JP 888188 A JP888188 A JP 888188A JP H01185617 A JPH01185617 A JP H01185617A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- oriented films
- crystal panel
- alignment film
- subjected
- 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 33
- 239000011521 glass Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 7
- 229910001506 inorganic fluoride Inorganic materials 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 8
- 230000006866 deterioration Effects 0.000 abstract description 5
- 238000003682 fluorination reaction Methods 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 238000000151 deposition Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 210000002381 plasma Anatomy 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment 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、画像表示用液晶パネルの配向膜の表面処理に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to surface treatment of an alignment film of a liquid crystal panel for image display.
従来の液晶パネルの界面構造を第２図に示す。 Figure 2 shows the interface structure of a conventional liquid crystal panel.
上下のパネルガラス１の内側に電極２を配置し、その内
側に配向膜３を付け、配向膜３の表面な配向処理した後
に、スペーサーで均一なギャップ寸法をもたせて、ギャ
ップ間に液晶を封入した構造が液晶パネルの基本構造で
ある。Electrodes 2 are placed inside the upper and lower panel glasses 1, an alignment film 3 is attached to the inside of the electrodes, and after the surface of the alignment film 3 is subjected to alignment treatment, a uniform gap size is provided with a spacer, and liquid crystal is sealed between the gaps. This structure is the basic structure of an LCD panel.
上下のｔ＆を極５の間に電圧を印加することにより液晶
の配向方向を変化させて、上下のパネルガラス１の外面
に偏光板を取シ付けた場合の光の透過状態を変化させる
ことができる０画素毎に任意に電極への電圧印加状態を
変化させることにより画像表示も可能である。By applying a voltage between the upper and lower t& poles 5, the alignment direction of the liquid crystal can be changed, and the state of light transmission when polarizing plates are attached to the outer surface of the upper and lower panel glass 1 can be changed. Image display is also possible by arbitrarily changing the voltage application state to the electrodes for each possible pixel.
配向膜３の表面の配向処理の仕方は、ラビングによる方
法が一般的である。配向膜５の表面近傍にある液晶は、
ラビング方向に揃って向いており、断面方向には、一定
のティルト角を保って向いている。配向し易い配向膜と
しては、ポリイミド、ポリビニルアルコールなどのポリ
マー及びＳ１０．な゛どの膜が良く使われている。The surface of the alignment film 3 is generally aligned by rubbing. The liquid crystal near the surface of the alignment film 5 is
They are aligned in the rubbing direction, and are oriented at a constant tilt angle in the cross-sectional direction. Examples of alignment films that are easy to align include polymers such as polyimide and polyvinyl alcohol, and S10. Which membranes are commonly used?
ここで、特にポリイミドなどのポリマーは、スピンコー
ドなどの簡単な塗布方法で、基板に付けることが可能で
あるが、その反面、不純物分子などを表面に吸着させ易
く、配向処理後の配向能力が、吸着した不純物により劣
化するという問題点または、吸着しているところと吸着
していないところの配向能力の差により、画像表示用と
しての液晶パネルの画質ムラが生じるという問題点につ
ながる。画質ムラは、コントラストのムラまたは明るさ
のムラなどが考えられる。Here, in particular, polymers such as polyimide can be attached to the substrate by a simple coating method such as a spin cord, but on the other hand, impurity molecules etc. are easily adsorbed to the surface, and the alignment ability after alignment treatment is reduced. This leads to the problem of deterioration due to adsorbed impurities, or the difference in alignment ability between adsorbed and non-adsorbed areas, resulting in uneven image quality of liquid crystal panels used for image display. The uneven image quality may be due to uneven contrast or uneven brightness.
本発明はかかる問題点を解決するもので、その目的は、
液晶パネルの配向膜表面への不純物の吸着をおさえ、常
に均一な配向能力を維持させ、画像表示用液晶パネルの
画質劣化または画質ムラを防止する方法を提供すること
にある。The present invention solves these problems, and its purpose is to:
It is an object of the present invention to provide a method for suppressing adsorption of impurities to the surface of an alignment film of a liquid crystal panel, constantly maintaining uniform alignment ability, and preventing deterioration or unevenness in image quality of a liquid crystal panel for image display.
本発明の液晶パネルの界面構造は、上下のガラス内側に
電極を配置し、その後に上下のガラス内側に配向膜を付
け、該上下ガラス間に液晶を封入した構造を基本構造と
する画像表示用液晶パネルにおいて、液晶と接する配向
膜の表面を配向処理する前または配向処理した後のうち
少なくともどちらか一方の状態の時に、該配向膜の表面
をフッ素化することを特徴とする。また、前記配向膜の
表面をフッ素化する方法を、無機フッ化物のプラズマ重
合とすることを特徴とする。更には、前記配向膜の表面
のデッ素化領域は、上下のパネルガラスを接着するシー
ル枠を付ける領域以外であることを特徴とする。The interface structure of the liquid crystal panel of the present invention has a basic structure in which electrodes are arranged inside the upper and lower glasses, alignment films are then attached to the insides of the upper and lower glasses, and liquid crystal is sealed between the upper and lower glasses. The liquid crystal panel is characterized in that the surface of the alignment film in contact with the liquid crystal is fluorinated at least either before or after the alignment treatment. Further, the method for fluorinating the surface of the alignment film is plasma polymerization of an inorganic fluoride. Furthermore, the de-coated region on the surface of the alignment film is other than the region where a sealing frame for bonding the upper and lower panel glasses is attached.
汎用ハイドロカーボン系ポリマーの表面をフッ素化した
場合、表面の臨界表面張力が減少し、水及び油、その他
の物質の表面へのぬれ性が悪くなり、吸着しにくくなる
。When the surface of a general-purpose hydrocarbon polymer is fluorinated, the critical surface tension of the surface decreases, and the wettability of water, oil, and other substances to the surface deteriorates, making it difficult to adsorb.
Ｎ？ｊ 、ＢＰ、、Ｓｉア、などの無機フッ化物のプ
ラズマは、それ自体重合することがなく、安定な遊離の
フッ素ラジカルを供給するために、Ｃ−？結合をもった
表面が闇単に得られる。N? The plasma of inorganic fluorides such as C-? A bonded surface is simply obtained.
以下に本発明の詳細な説明する。第１図が本発明におけ
る液晶パネルの界面構造を表わす断面図である。配向膜
５の表面を薄くフッ素化し、フッ素化異面５をつくる。The present invention will be explained in detail below. FIG. 1 is a cross-sectional view showing the interface structure of a liquid crystal panel according to the present invention. The surface of the alignment film 5 is thinly fluorinated to form a fluorinated different surface 5.
配向処理は、フッ素化前でも後でも良いが、フッ素化の
前後に各１回ずつ配向処理を行なう方法もあり、特に高
い液晶の配向能力が期待できる。表面のフッ素化の具体
的方法は、直接的には７．ガスによる方法もあるが、反
応が激しく、取扱いが危険であるため、特別な装置が必
要である。Ｎ？、、ＢＰ、、Ｓｉｎ、などの無機フッ化
物のプラズマは、それ自体重合することがなく、安定な
遊離のフッ素ラジカルを供給するために、ａ−ｙ結合を
もった表面が簡単に得られるため、主に無機７フ化物の
プラズマ重合でフッ素化する。また、フッ素化された表
面は一般的に密着強度が悪くなるため、上下のパネルガ
ラスを接着するシール枠を付ける領域にはフッ素化しな
いこととする。The alignment treatment may be performed before or after fluorination, but there is also a method in which alignment treatment is performed once before and after fluorination, and a particularly high liquid crystal alignment ability can be expected. The specific method for surface fluorination is directly described in 7. There is also a method using gas, but the reaction is violent and handling is dangerous, so special equipment is required. N? , , BP, , Sin, and other inorganic fluoride plasmas do not polymerize themselves, and in order to supply stable free fluorine radicals, a surface with ay bonds can be easily obtained. , mainly fluorinated by plasma polymerization of inorganic heptafluoride. In addition, since fluorinated surfaces generally have poor adhesion strength, the area where the sealing frame for bonding the upper and lower panel glasses will be attached will not be fluorinated.
本発明は、配向膜表面をフッ素化することにより、パネ
ル組立工程中または、完成後の実使用時に液晶中に含ま
れている不純物、特に水分や油などの物質、または液晶
自身、さらには組立工哩中のその他の安置による不純物
などが配向膜に吸着または浸透して配向膜の配向能力が
劣化することを防止−する。よって、配向膜の高い配向
規制力が長期間維持できるため、信頼性のある高画質の
液晶表示パネルを提供できる。本発明は、前記基本構造
の液晶パネルであれば画像表示用だけでなく、他のどの
ような用途の液晶パネルにも効果がある。By fluorinating the surface of the alignment film, the present invention eliminates impurities contained in the liquid crystal during the panel assembly process or during actual use after completion, especially substances such as water and oil, or the liquid crystal itself. This prevents impurities caused by other storage during processing from adsorbing or penetrating into the alignment film, thereby preventing deterioration of the alignment ability of the alignment film. Therefore, the high alignment regulating ability of the alignment film can be maintained for a long period of time, so that a reliable, high-image-quality liquid crystal display panel can be provided. The present invention is effective not only for displaying images but also for liquid crystal panels for any other uses as long as the liquid crystal panel has the basic structure described above.
第１図は本発明における液晶パネルの界面構造を表わす
断面図、第２図は従来の液晶パネルの界面構造を表わす
断面図である。
１・・・・・・・・・パネルガラス
２・・・・・・・・・電 極
３・・・・・・・・・配向膜
４・・・・・・・・・液 晶
５・・・・・・・・・本発明のフッ素化表面６・・・・
・・・・・吸着した不純物分子以上
出願人 セイコーエプソン株式会社
０ ０ 、 ｏ Ｑ
Ｏｋケ
５ ／（ＥｌFIG. 1 is a sectional view showing the interface structure of a liquid crystal panel according to the present invention, and FIG. 2 is a sectional view showing the interface structure of a conventional liquid crystal panel. 1... Panel glass 2... Electrode 3... Alignment film 4... Liquid crystal 5. ...Fluorinated surface 6 of the present invention...
...Adsorbed impurity molecules or more Applicant: Seiko Epson Corporation 0 0, o Q
Okke5 /(El
Claims (3)
のガラス内側に配向膜を付け、該上下ガラス間に液晶を
封入した構造を基本構造とする画像表示用液晶パネルに
おいて、液晶と接する配向膜の表面を配向処理する前ま
たは配向処理した後のうち少なくともどちらか一方の状
態の時に、該配向膜の表面をフッ素化することを特徴と
する液晶パネルの界面構造。(1) In an image display liquid crystal panel whose basic structure is that electrodes are arranged inside the upper and lower glasses, alignment films are then attached to the insides of the upper and lower glasses, and liquid crystal is sealed between the upper and lower glasses, the electrodes are placed in contact with the liquid crystal. 1. An interface structure for a liquid crystal panel, characterized in that the surface of an alignment film is fluorinated at least either before or after alignment treatment on the surface of the alignment film.
ッ化物のプラズマ重合とすることを特徴とする特許請求
の範囲第１項記載の液晶パネルの界面構造。(2) The interface structure of a liquid crystal panel according to claim 1, wherein the method of fluorinating the surface of the alignment film is plasma polymerization of an inorganic fluoride.
ルガラスを接着するシール枠を付ける領域以外とするこ
とを特徴とする特許請求の範囲第１項記載の液晶パネル
の界面構造。(3) The interface structure of a liquid crystal panel according to claim 1, wherein the fluorinated region on the surface of the alignment film is a region other than the region where a sealing frame for bonding the upper and lower panel glasses is attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP888188A JPH01185617A (en) | 1988-01-19 | 1988-01-19 | Boundary structure of liquid crystal panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP888188A JPH01185617A (en) | 1988-01-19 | 1988-01-19 | Boundary structure of liquid crystal panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01185617A true JPH01185617A (en) | 1989-07-25 |
Family
ID=11705017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP888188A Pending JPH01185617A (en) | 1988-01-19 | 1988-01-19 | Boundary structure of liquid crystal panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01185617A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001318622A (en) * | 1999-12-27 | 2001-11-16 | Sanyo Electric Co Ltd | Display device and method for manufacturing the same |
| JP2008102557A (en) * | 2008-01-17 | 2008-05-01 | Sharp Corp | Liquid crystal display device |
-
1988
- 1988-01-19 JP JP888188A patent/JPH01185617A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001318622A (en) * | 1999-12-27 | 2001-11-16 | Sanyo Electric Co Ltd | Display device and method for manufacturing the same |
| US6905903B2 (en) | 1999-12-27 | 2005-06-14 | Sanyo Electric Co., Ltd. | Display unit and method of fabricating the same |
| JP2008102557A (en) * | 2008-01-17 | 2008-05-01 | Sharp Corp | Liquid crystal display device |
| JP4669887B2 (en) * | 2008-01-17 | 2011-04-13 | シャープ株式会社 | Manufacturing method of liquid crystal display device |
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