KR930005556B1 - Making method of lcd - Google Patents

Making method of lcd Download PDF

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Publication number
KR930005556B1
KR930005556B1 KR1019910005477A KR910005477A KR930005556B1 KR 930005556 B1 KR930005556 B1 KR 930005556B1 KR 1019910005477 A KR1019910005477 A KR 1019910005477A KR 910005477 A KR910005477 A KR 910005477A KR 930005556 B1 KR930005556 B1 KR 930005556B1
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South Korea
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liquid crystal
crystal display
display device
substrate
glass substrates
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KR1019910005477A
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Korean (ko)
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KR920020235A (en
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원민영
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삼성전관 주식회사
김정배
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements

Abstract

The method comprises (a) coating the upper surface of the lower substrate with the common electrode and coating the lower surface substrate with the segment electrode, (b) coating electrodes with oriented films, (c) inserting a spacer to balance the upper and lower substrates, (d) injecting liquid crystal into space between the glass substrates through an inlet, which is formed on one side of the substrate, (f) cooling liquid crystal to -10 - -20 deg.C to be condensed by pressing the liquid crystal display element (3) with cooled die (1) and punch (2), and (g) sealing the inlet. The method can prevent bubble formation during the condensation of liquid crystal.

Description

액정표시소자의 제조방법Manufacturing method of liquid crystal display device

제1도는 본 발명에서 작업 방법의 일례로서 냉각된 프레스를 이용하여 액정패널의 셀 갭의 간격을 압착하는 상태도.1 is a state diagram in which a gap of a cell gap of a liquid crystal panel is compressed using a cooled press as an example of a working method in the present invention.

제2도는 본 발명을 설명하기 위한 액정표시소자의 단면도이다.2 is a cross-sectional view of a liquid crystal display device for explaining the present invention.

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

1 : 다이 2 : 펀치1: die 2: punch

본 발명은 액정표시소자에 관한 것으로서, 상세하게는 액정표시소자의 액정에 기포가 생기지 않게 한 액정표시소자의 제조 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a method for manufacturing a liquid crystal display device in which bubbles are not generated in the liquid crystal of the liquid crystal display device.

종래의 액정표시소자의 일반적인 구조는 제2도에서 나타낸 바와 같다. 액정표시소자(A)는 상하부의 유리기판(B), (B′)의 대향면에 투명한 세그먼트 전극(C)과 커먼전극(D)을 시설하고, 각 전극 위에는 소정의 배향막(E), (E′)을 형성한다. 상하부의 유리기판(B), (B′)을 평행하게 유지되게 주위에 스페이서(F) 등을 삽입한 다음 프릿 글라스나 유기 접착제(G) 등으로 시일처리하여, 내부에 형성된 공간에는 소정의 액정(H)이 주입된 구조로 되어 있다.The general structure of a conventional liquid crystal display device is as shown in FIG. The liquid crystal display device A has a transparent segment electrode C and a common electrode D on the opposing surfaces of the upper and lower glass substrates B and B ', and a predetermined alignment layer E and E '). Spacer F or the like is inserted around the upper and lower glass substrates B and B 'so as to remain in parallel, and then sealed with frit glass or an organic adhesive G, and a predetermined liquid crystal is formed in the space formed therein. It has a structure in which (H) is injected.

상하부 유리기판(B), (B′) 사이에 봉입된 액정(H)은 세그먼트 전극(C)과 커먼전극(D)으로 형성되는 전계에 의해 유전이방성을 띠게 함으로써 문자나 기호 등을 화면에 표시케 되는 것이다.The liquid crystal H encapsulated between the upper and lower glass substrates B and B ′ has a dielectric anisotropy by an electric field formed by the segment electrode C and the common electrode D to display letters, symbols, and the like on the screen. It becomes.

상기한 액정표시소자(A)의 제조 방법을 간단하게 설명하면 다음과 같다.The manufacturing method of the above-mentioned liquid crystal display device (A) is briefly described as follows.

상하부의 유리기판(B), (B′)을 순수를 이용하여 깨끗하게 세정한 다음, 하부 유리기판(B′)의 상면에 커먼전극(D)을 도포하고, 상부 유리기판(B)의 하면에는 투명한 세그먼트 전극(C)을 도포한 뒤, 세그먼트 전극(C)과 커먼전극(D) 위에는 배향막(E), (E′) 표면에 러빙처리를 하여 소정의 배향제어면을 만든다.The upper and lower glass substrates B and B 'are cleaned with pure water, and then the common electrode D is applied to the upper surface of the lower glass substrate B', and the lower surface of the upper glass substrate B is After the transparent segment electrode C is applied, rubbing treatment is performed on the surface of the alignment films E and E 'on the segment electrode C and the common electrode D to form a predetermined alignment control surface.

상기한 상하부 기판(B), (B′)을 상호 마주보게 얼라인시키고, 스페이서(F)를 배치 개재하여, 기판의 테두리 일측에 액정 주입구를 두고, 프릿 글라스나 유기 접착(G) 등으로 테두리를 시일하고 소정하여 고정시킨다. 이렇게 상하부의 유리기판(B), (B′) 사이에 형성된 공간에 소정의 액정주입장치를 이용하여 액정(H)을 주입한 다음, 액정 주입구를 봉입하는 앤드 시일하면 소정의 액정표시소자(A)를 얻을 수가 있다.The upper and lower substrates B and B 'are aligned to face each other, and the liquid crystal injection hole is placed on one side of the substrate via the spacer F, and the edge is formed by frit glass, organic adhesive G, and the like. The seal is fixed and fixed. The liquid crystal (H) is injected into the space formed between the upper and lower glass substrates (B) and (B ') using a predetermined liquid crystal injection device, and then sealed and sealed to fill the liquid crystal injection hole. ) Can be obtained.

액정표시소자(A)의 사하부 유리기판(B), (B′)을 평행되게 하고, 셀 갭의 간격을 균일하게 만들기 위하여 통상 압착 프레스로 상하부의 유리기판(B), (B′)을 압착시키고 있다. 그러나 액정표시소자(A)의 크기가 작고 상하부 유리기판(B), (B′) 사이에 개재되는 스페이서(F)를 정밀하게 제작하여 배치하면 상하부의 유리기판(B), (B′)을 압착시키는 공정이 불필요하게 된다.In order to make the lower and lower glass substrates (B) and (B ') of the liquid crystal display device (A) parallel, and to make the gap between the cell gaps uniform, the glass substrates (B) and (B') are usually It is squeezed. However, when the size of the liquid crystal display device A is small and the spacers F interposed between the upper and lower glass substrates B and B 'are precisely manufactured and arranged, the upper and lower glass substrates B and B' are disposed. The pressing process is unnecessary.

상기한 액정표시소자(A)에 봉입된 액정(H)은 시간이 지남에 따라서 특히, 액정(H)이 냉각될 경우에 기포가 발생되고 있다.The liquid crystal H encapsulated in the liquid crystal display device A generates bubbles as the liquid crystal H cools over time.

상기한 바와 같이 액정표시소자(A)의 액정(H)에 기포가 있으면 액정표시소자(A)를 디스플레이 할 때 기포가 있는 부위가 검게 보이는 불량이 발생되어 액정표시소자의 품질을 저하시키게 된다.As described above, if there is bubbles in the liquid crystal H of the liquid crystal display device A, a defect in which the bubbled portions appear black is generated when the liquid crystal display device A is displayed, thereby degrading the quality of the liquid crystal display device.

본 발명은 상기한 문제점을 해소하기 위해 안출한 것으로서, 액정표시소자에 봉입된 액정에 기포가 발생되지 않는 액정표시소자의 제조 방법을 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, and an object thereof is to provide a method for manufacturing a liquid crystal display device in which bubbles are not generated in the liquid crystal enclosed in the liquid crystal display device.

상기 목적에 따라 액정표시소자의 상하부 기판내에 액정을 주입한 후 액정을 냉각시켜 봉입하는 것을 제안한다.According to the above object, it is proposed to cool and encapsulate a liquid crystal after injecting the liquid crystal into upper and lower substrates of the liquid crystal display element.

이하 본 발명의 이해를 돕기 위해 첨부한 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 액정표시소자를 제조하는 방법을 간단하게 설명하면 다음과 같다. 먼저 깨끗하게 세정된 하부기판의 상면에 커먼전극을 도포하고, 상기 기판의 하면에는 세그먼트 전극을 도포한 뒤, 각 전극 위에 배향막을 도포하고 표면에는 소정의 러빙 각도를 갖는 배향제어면을 형성한다.A method of manufacturing the liquid crystal display device of the present invention is briefly described as follows. First, a common electrode is applied to the upper surface of the cleanly cleaned lower substrate, a segment electrode is applied to the lower surface of the substrate, an alignment film is applied to each electrode, and an orientation control surface having a predetermined rubbing angle is formed on the surface.

상하부의 기판이 균일한 간격이 유지되게 스페이서를 개재하고, 기판의 일측에 액정 주입구를 형성하여 테두리를 프릿 글라스나 유기 접착제 등으로 시일한 다음 소정하여 고정시키고, 상하부 유리기판 사이에 형성된 공간에는 액정주입장치를 이용하여 액정을 주입한다.Liquid crystal injection holes are formed on one side of the substrate through spacers so that the upper and lower substrates have a uniform gap, and the edges are sealed with frit glass or an organic adhesive, and then fixed and fixed. Liquid crystal is injected using an injection device.

상기한 상하부 유리기판 사이에 액정이 주입되면 액정이 응축되도록 액정을 -10℃ 내지는 -20℃로 냉각시킨 다음 액정 주입구를 봉입한다.When the liquid crystal is injected between the upper and lower glass substrates, the liquid crystal is cooled to −10 ° C. or −20 ° C. to condense the liquid crystal, and then the liquid crystal injection hole is filled.

상기한 바와 같이 액정을 냉각시킨 다음 액정을 봉입하게 되면 제한된 공간안에 밀도가 높게 액정이 주입되어 기포발생의 여지를 없애게 됨에 따라서 종래의 기포 문제를 해소할 수 있다.As described above, when the liquid crystal is cooled, and then the liquid crystal is encapsulated, the liquid crystal is injected at a high density in a limited space, thereby eliminating the possibility of bubble generation, thereby solving the conventional bubble problem.

통상 액정 고유의 성질로서 액정에 열을 가하면 액정이 액상으로 변하여 유동성이 좋고, 액정의 온도가 낮아지면 비례하여 유동성이 좋지않게 되므로 유동성이 좋은 상태에서 액정을 주입한 다음, 액정을 냉각시켜 봉입하면 작업이 한결 쉽게 되는 것이다.Normally, the liquid crystal is inherent in liquid crystal when the liquid crystal is changed into liquid phase and the liquidity is good. When the temperature of the liquid crystal is lowered, the liquidity is poorly proportional to the liquid crystal. Your work will be easier.

상기한 바와 같이 상하부 기판 사이에 내장된 액정을 소정의 온도까지 냉각시키기 위해서는 냉각장치를 갖춘 챔버나 또는 별도의 냉각 수단이 필요하다. 그러나 액정표시소자의 실 갭의 균일성을 얻기 위하여 상하부의 기판을 압착시키는 공정을 거치는 경우에는 제1도에서와 같이 다이(1)와 펀치(2)를 냉각시켜 액정표시소자(3)을 압착시키는 한결 경제적으로 작업을 할 수가 있다.As described above, in order to cool the liquid crystal embedded between the upper and lower substrates to a predetermined temperature, a chamber having a cooling device or a separate cooling means is required. However, in order to compress the upper and lower substrates in order to obtain a uniformity of the seal gap of the liquid crystal display device, as shown in FIG. 1, the die 1 and the punch 2 are cooled to compress the liquid crystal display device 3. You can work more economically.

즉, 액정표시소자(3)을 프레스로 압착시킬 때에는 프레스의 다이(1)와 펀치(2)로 액정표시소자(3)의 열을 흡수함에 따라서 액정표시소자의 상하부 유리기판과 그에 내장된 액정의 열이 프레스의 펀치(2)와 다이(1)로 흡수가 되어 액정을 응축시킬 수가 있다.That is, when the liquid crystal display device 3 is pressed by a press, the upper and lower glass substrates of the liquid crystal display device and the liquid crystal embedded therein are absorbed by the heat of the liquid crystal display device 3 by the die 1 and the punch 2 of the press. Heat can be absorbed by the punch 2 and the die 1 of the press to condense the liquid crystal.

상기한 펀치(2)와 다이(1)는 소정의 냉각장치나 기타의 방법에 의하여 -10℃ 내지는 -20℃ 정도로 냉각된 상태를 유지해야 함은 당연하고, 양호한 작업을 위해서는 프레스 주위의 분위기도 냉각된 상태를 유지하는 것이 바람직하다.It is obvious that the punch 2 and the die 1 should be cooled to about -10 ° C or -20 ° C by a predetermined cooling device or other method. It is desirable to maintain a cooled state.

이상에서 설명한 바와 같이 본 발명의 방법에 의해 액정표시소자를 제조하게 되면 액정표시소자에서 기포로 인한 문제가 해소되어 품질을 크게 향상시킬 수가 있다.As described above, when the liquid crystal display device is manufactured by the method of the present invention, the problem caused by bubbles in the liquid crystal display device can be solved and the quality can be greatly improved.

Claims (1)

액정표시소자의 상하부 유리기판 사이에 형성된 공간에 액정을 주입한 다음 행하는 봉입공정에 있어서, 주입된 액정이 -10℃ 내지는 -20℃로 냉각시킨 다음 봉입하는 것을 특징으로 하는 액정표시소자의 제조방법.In the encapsulation step in which the liquid crystal is injected after the liquid crystal is injected into the space formed between the upper and lower glass substrates of the liquid crystal display device, the injected liquid crystal is cooled to -10 ° C or -20 ° C and then encapsulated. .
KR1019910005477A 1991-04-04 1991-04-04 Making method of lcd KR930005556B1 (en)

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KR930005556B1 true KR930005556B1 (en) 1993-06-23

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