KR930002929B1 - Rubbing membrane formation method of lcd - Google Patents

Rubbing membrane formation method of lcd Download PDF

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KR930002929B1
KR930002929B1 KR1019890019334A KR890019334A KR930002929B1 KR 930002929 B1 KR930002929 B1 KR 930002929B1 KR 1019890019334 A KR1019890019334 A KR 1019890019334A KR 890019334 A KR890019334 A KR 890019334A KR 930002929 B1 KR930002929 B1 KR 930002929B1
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polyphenylene
film
liquid crystal
alignment film
crystal display
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KR1019890019334A
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Korean (ko)
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KR910012767A (en
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원민영
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삼성전관주식회사
김정배
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    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

The method comprises (a) coating with polyphenylene the ITO transparent electrode (4) of the glass substrate (1) to form a polyphenylene film, (b) drying and baking the polyphenylene film in an oven at 390-430 deg.C, and (c) rubbing the polyphenylene film with a cloth, paper or synthetic fabric at a twist angle of 240-360≰ to form an oriented film (12) having a pretilt angle (θ) of 10-20≰. The method provides a good contrast and reduces operating processes and the process time for SiO2 deposition as well as raw material cost for the oriented film.

Description

액정 표시소자의 배향막 형성방법Method of forming alignment film of liquid crystal display device

제 1 도는 폴리이미드를 사용한 종래의 액종표시소자에 있어서의 배향막을 도시한 도면.1 is a view showing an alignment film in a conventional liquid species display device using polyimide.

제 2 도는 본 발명의 일실시예에 의한 배향막을 도시한 도면.2 is a view showing an alignment film according to an embodiment of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 유리기판 2, 12 : 배향막1 glass substrate 2, 12 alignment film

3 : 액정분자 4 : 투명전극3: liquid crystal molecule 4: transparent electrode

본 발명은 액정 표시소자의 배향막 형성방법에 관한 것으로서, 특히 액정분자를 배향시키기 위한 기판표면의 배향막 형성방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming an alignment film of a liquid crystal display device, and more particularly to a method of forming an alignment film on a surface of a substrate for orienting liquid crystal molecules.

최근, 액정 표시소자는 예를들면 손목시계용, 또는 평판형 컬러 텔레비젼 자동차의 계기등에 널리 사용되고 있으며, 이에 따라서 다이나믹 매트릭스 액정표시, 강유전체 액정표시, 슈퍼 트위스티드 네마틱액정표시를 위한 고성능의 액정 표시소자의 출연이 요망되고 있다.In recent years, liquid crystal display devices are widely used in, for example, wristwatches or instruments in flat-panel color television vehicles. Appearance of is expected.

그러데, 액정표시소자의 성능을 결정하는 가장근본적인 요인으로 배향 제어기술을 들 수 있다. 이 배향제어기술은 표시소자의 전면에 걸쳐서 일정한 방향으로 액정분자를 배향시키는 방법으로서, 이 기술에 따라 표시특성이 크게 의존된다.However, an orientation control technique is the most fundamental factor that determines the performance of the liquid crystal display device. This alignment control technique is a method of orienting liquid crystal molecules in a constant direction over the entire surface of the display element, and the display characteristics greatly depend on this technique.

즉, 종래의 슈퍼 트위스티드 네마틱액정표시소자는 그 제작시에 트위스트각을 240° 이상으로 향상시키려면 액정이 용이하게 뱅향되지 않으므로, 제 1 도에 도시한 바와같이, 유리기판(1)의 투명전극(4)상에 증착법에 의해 SnO2를 증착시킨 후, 이 투명전극(4) 상에 배향제로서 폴리이미드(polyimede)를 도포하고 모포, 종이, 화학섬유등으로 일정한 방향으로 러빙하여, 2°~5°의 프리틸트(pretitl) 각을 가진 배향막(2)을 형성해서 액정분자(3)를 배향시키도록 하고 있었으나, 이와같이 폴리이미드를 사용한 액정표시소자는 프리틸트각이 2°~5°로 작고, 배향각을 10°~20°로 형성할 경우에는 SnO2를 스프터링 증착방법으로 하여야 하므로, 제조공정이 복잡하고 제조코스트도 높아서 대량생산에는 부적합하며 또한 표시품질을 향상시킬 수 없다는 문제점이 있었다.That is, in the conventional super twisted nematic liquid crystal display device, since the liquid crystal is not easily banged in order to improve the twist angle to 240 ° or more at the time of fabrication thereof, as shown in FIG. 1, the glass substrate 1 is transparent. After depositing SnO 2 on the electrode 4 by vapor deposition, polyimide was applied as an alignment agent on the transparent electrode 4 and rubbed in a fixed direction with a blanket, paper, chemical fiber, or the like. Although an alignment film 2 having a pretilt angle of ° -5 ° was formed to align the liquid crystal molecules 3, the liquid crystal display device using polyimide has a pretilt angle of 2 ° -5 °. It is necessary to use SnO 2 as sputtering deposition method when forming an orientation angle of 10 ° to 20 °. Therefore, the manufacturing process is complicated and the manufacturing cost is high, so it is not suitable for mass production and the display quality cannot be improved. There was this.

본 발명은 상기 문제점을 감안해서 이루어진 것으로서, 본 발명의 목적은 폴리페닐렌(polyphenylen)배향제를 간단히 도포하는 것만으로 배향막의 프리틸트각을 10°~20°로 증가시켜서 트위스트각의 증가, 콘트라스트의 향상, 빠른 응답속도 및 표시품질을 향상시킬 수 있는 슈퍼 트위스티드 네마틱 액정 표시소자를 제공하는데 있다.The present invention has been made in view of the above problems, and an object of the present invention is to increase the twist angle by increasing the pretilt angle of the alignment film to 10 ° to 20 ° by simply applying a polyphenylen aligning agent. The present invention provides a super twisted nematic liquid crystal display device capable of improving the speed, response speed, and display quality.

본 발명에 의한 액정 표시소자의 배향막 형성방법은 액정과 접촉하는 표면을 러빙해서 배향막을 형성하는 액정표시소자의 배향막 형성방법에 있어서, 유리기판의 ITO 투명전극상에 폴리페닐렌을 도포하여 폴리페닐렌막을 형성하고, 이 폴리페닐렌막을 건조한 후, 베이킹하고, 240°~360°의 트위스트각으로 러빙해서 10°~20°의 프리틸트각을 가진 배향막을 형성하는 것을 특징으로 한다.In the method for forming an alignment film of a liquid crystal display device according to the present invention, in the method for forming an alignment film of a liquid crystal display device by rubbing a surface in contact with a liquid crystal to form an alignment film, polyphenylene is coated on an ITO transparent electrode of a glass substrate. A lene film is formed, the polyphenylene film is dried, baked, and then rubbed at a twist angle of 240 ° to 360 ° to form an alignment film having a pretilt angle of 10 ° to 20 °.

이하, 본 발명의 실시예에 대하여 첨부도면을 참조하면서 상세히 설명한다. 또한, 제 1 도에 도시한 종래예의 구성요소와 동일한 부분에는 동일한 부호를 붙이고 중복되는 설명은 생략한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the same part as the component of the conventional example shown in FIG. 1, and the overlapping description is abbreviate | omitted.

제 2 도는 본 발명의 일실시예에 의한 액정 표시소자의 배향막을 도시한 도면이다. 먼저, 액정표시소자의 제조방법에 관하여 설명한다. 동도면에 있어서, 유리기판(1)을 탈이온수소 세정한 후 건조시켜서ITO 투명전극(4)을 패터닝하여 형성한다.2 is a diagram illustrating an alignment layer of a liquid crystal display device according to an exemplary embodiment of the present invention. First, the manufacturing method of a liquid crystal display element is demonstrated. In the same drawing, the glass substrate 1 is washed with deionized hydrogen and then dried to form the ITO transparent electrode 4 by patterning.

이 ITO 투명전극(4)이 형성된 유리판(1)을 다시 탈이온수로 세정하여 건조한 후, 습도가 50% 이하인 조건하에서 ITO 투명전극(4) 상에 폴리페닐렌을 도포하여 건조시켜서 390℃~430℃의 오븐에서 베이킹한다. 다음에 이 폴리페닐렌막을 모포, 종이, 화학섬유등으로 일정한 방향으로 러빙해서 프리틸트각(θ)이 10°~20°인 배향막(12)을 얻었다.The glass plate 1 on which the ITO transparent electrode 4 was formed was washed again with deionized water and dried, and then, polyphenylene was applied and dried on the ITO transparent electrode 4 under a condition of 50% humidity or lower and then dried at 390 ° C to 430. Bake in an oven at ℃. Next, the polyphenylene film was rubbed in a constant direction with a blanket, paper, chemical fiber or the like to obtain an alignment film 12 having a pretilt angle θ of 10 ° to 20 °.

상기 설명으로부터 알 수 있는 바와같이 본 발명에 의하면, 유리기판의 ITO 투명전극상에 폴리페닐렌 배향제를 사용함으로써 종래의 폴리이미드를 사용한 배향막의 프리틸트각(θ) 보다 증가된 10°~20°의 프리틸트각을 얻을 수 있으므로, 콘트라스트의 향상을 얻을 수 있을 뿐만 아니라, SnO2의 증착에 필요한 증착설비 및 증착소요시간의 절감에 의해 작업공정 및 작업시간을 단축할 수 있으며, 또한 배향막의 재료비를 절감할 수 있다는 뛰어난 효과가 있는 것이다.As can be seen from the above description, according to the present invention, by using the polyphenylene aligning agent on the ITO transparent electrode of the glass substrate, the angle of 10 ° to 20 increased from the pretilt angle (θ) of the alignment film using the conventional polyimide. Since the pretilt angle of ° can be obtained, not only can the contrast be improved, but also the working process and the working time can be shortened by reducing the deposition equipment and the deposition time required for the deposition of SnO 2 , This is an excellent effect that can reduce the material cost.

Claims (1)

액정과 접촉하는 표면을 러빙해서 배향막을 형성하는 액정 표시소자의 배향막 형성방법에 있어서, 유리기판(1)의 ITO 투명전극(4)상에 폴리페닐렌을 도포하여 폴리페닐렌막을 형성하고, 이 폴리페닐렌막을 건조한 후 베이킹하고 240˚~360˚의 트위스트각으로 러빙해서 10˚~20˚의 프리틸트각(θ)을 가진 배향막(12)을 형성하는 것을 특징으로 하는 액정표시소자의 배향막 형성방법.In the method for forming an alignment film of a liquid crystal display device by rubbing the surface in contact with the liquid crystal to form an alignment film, a polyphenylene film is formed by applying polyphenylene on the ITO transparent electrode 4 of the glass substrate 1, and Forming the alignment film of the liquid crystal display device, characterized in that the polyphenylene film is dried, baked, and then rubbed at a twist angle of 240 ° to 360 ° to form an alignment film 12 having a pretilt angle θ of 10 ° to 20 °. Way.
KR1019890019334A 1989-12-22 1989-12-22 Rubbing membrane formation method of lcd KR930002929B1 (en)

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KR100628261B1 (en) * 2001-04-25 2006-09-27 엘지.필립스 엘시디 주식회사 A liquid crystal display device having an alignment layer comprising polyphenylenphthalamide-based materials, and the method of manufacturing the same

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