KR940009159B1 - Color filter of lcd - Google Patents
Color filter of lcd Download PDFInfo
- Publication number
- KR940009159B1 KR940009159B1 KR1019920000530A KR920000530A KR940009159B1 KR 940009159 B1 KR940009159 B1 KR 940009159B1 KR 1019920000530 A KR1019920000530 A KR 1019920000530A KR 920000530 A KR920000530 A KR 920000530A KR 940009159 B1 KR940009159 B1 KR 940009159B1
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- South Korea
- Prior art keywords
- color filter
- electrodes
- liquid crystal
- electrode
- crystal display
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
Description
제1도는 종래의 구조도.1 is a conventional structural diagram.
제2도는 종래의 단면도.2 is a conventional cross-sectional view.
제3도는 본 발명에 따른 구조도.3 is a structural diagram according to the present invention.
제4도는 본 발명에 따른 단면도.4 is a cross-sectional view according to the present invention.
본 발명은 액정 디스플레이(LCD ; Liquid Crystal Display)에 관한것으로 칼라액정디스플레이의 칼라 필터에 관한 것이다.The present invention relates to a liquid crystal display (LCD) and to a color filter of a color liquid crystal display.
액정 디스플레이의 칼라표시는 적, 녹, 청의 3원색의 칼라 필터를 배치하여, 입사된 백색광이 착색광으로 되어서 나감에 의해 이루어진다.The color display of the liquid crystal display is performed by arranging color filters of three primary colors of red, green, and blue, and the incident white light turns into colored light.
제1도는 종래의 2층 전극 칼라 필터의 구조도이다.1 is a structural diagram of a conventional two-layer electrode color filter.
상기 도면에 도시된 바와 같이 글래스 기판(1)상에 ITO(Indium Tin Oxide)막으로 이루어지는 하부 투명전극(3)을 형성하고 그 상면에 상기 하부 투명전극과 같은 크기의 칼라 필터(5)를 형성한다. 그 다음 상기 칼라 필터 상면에 ITO막으로 이루어지는 상부 투명전극(7)을 형성한다.As shown in the drawing, a lower transparent electrode 3 made of an indium tin oxide (ITO) film is formed on the glass substrate 1, and a color filter 5 having the same size as the lower transparent electrode is formed on the upper surface thereof. do. Then, an upper transparent electrode 7 made of an ITO film is formed on the color filter upper surface.
상기 칼라 필터(7)는 블럭 마스크(block mask)(9)에 의해 청(blue), 녹(Green), 적(Red)계로 구별된다.The color filter 7 is classified into a blue, green, and red system by a block mask 9.
한편 상기 상부 및 하부 투명전극(3, 7)은 시각 공정을 이용한 접촉구(Contact hole)(11)에 의해 연결된다.The upper and lower transparent electrodes 3 and 7 are connected by contact holes 11 using a visual process.
제2도는 종래의 2층 전극 칼라 필터의 단면도로서 상기 제1도의 A-A′선을 자른 단면도이다. 상기 제1도와 같은 명칭에 해당하는 것은 같은 번호를 사용하였다.2 is a cross-sectional view of a conventional two-layer electrode color filter, taken along the line A-A 'of FIG. The same numbers as those in FIG. 1 are used.
상기한 바와 같이 종래에는 제1 및 제2투명전극의 연결을 위한 접촉구를 형성하기 위하여 별도의 공정이 필요함에 따라 칼라 필터의 제조가 어렵고 불량률이 증가하는 문제점이 있었다.As described above, conventionally, as a separate process is required to form contact holes for connecting the first and second transparent electrodes, it is difficult to manufacture the color filter and there is a problem that the defective rate increases.
따라서 본 발명의 목적은 액정 디스플레이의 칼라 필터에 있어서 공정수 및 불량률이 감소된 칼라 필터를 제공함에 있다.Accordingly, an object of the present invention is to provide a color filter in which the number of processes and the defective rate are reduced in the color filter of the liquid crystal display.
상기한 바와 같은 본 발명의 목적을 달성하기 위하여 코어(Core)형으로 칼라 필터 전극을 형성함을 특징으로 한다.In order to achieve the object of the present invention as described above, it is characterized by forming a color filter electrode in the core (Core) type.
이하 본 발명을 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
제2도는 본 발명에 따른 칼라 필터의 구조도이다.2 is a structural diagram of a color filter according to the present invention.
먼저 글래스 기판(21) 상면에 500Å정도 두께의 제1ITO막(23)을 증착 또는 인쇄법에 의해 형성한다. 상기 제1ITO막은 하부전극으로 이용된다.First, the first ITO film 23 having a thickness of about 500 GPa is formed on the upper surface of the glass substrate 21 by vapor deposition or printing. The first ITO film is used as a lower electrode.
그 다음 상기 제1ITO막 상면에 그보다 작은 크기의 칼라 필터(25)를 형성한다. 상기 칼라 필터는 전착법이나 안료분산법이나 염색법으로 형성된다.A smaller sized color filter 25 is formed on the first ITO film. The color filter is formed by an electrodeposition method, a pigment dispersion method or a dyeing method.
상기 칼라 필터 상면에 적, 녹, 청의 단차를 줄이기 위하여 폴리이미드로된 보호막을 상기 칼라 필터와 같은 크기로 형성할 수도 있다.A protective film made of polyimide may be formed on the upper surface of the color filter to have the same size as that of the color filter in order to reduce the step of red, green, and blue.
그 다음 상기 기판 상면에 800Å-1000Å 정도의 두께로 제2ITO막(27)를 형성한다. 상기 제2ITO막은 상기 칼라 필터를 거쳐 액정에 전압이 인가됨에 의해 일어나는 전압강하를 방지하기 위한 상부전극으로 이용된다. 그리하여 전압의 손실없이 인가전압이 그대로 액정에 인가됨으로써 콘트라스트가 상승하여 밝은 화상을 얻을 수 있다.Next, a second ITO film 27 is formed on the upper surface of the substrate to a thickness of about 800 kHz to 1000 kHz. The second ITO film is used as an upper electrode for preventing a voltage drop caused by voltage being applied to the liquid crystal through the color filter. Thus, the applied voltage is applied to the liquid crystal as it is without loss of voltage, whereby the contrast increases and a bright image can be obtained.
제4도는 본 발명에 따른 2종 전극 칼라 필터의 단면도로서, 상기 제3도의 B-B′선을 자른 단면도이다. 상기 제3도와 같은 명칭에 해당하는 것은 같은 번호를 사용하였다.4 is a cross-sectional view of the two-color electrode color filter according to the present invention, taken along line B-B 'of FIG. The same numbers as those in FIG. 3 are used.
상기 제3도 및 제4도로부터 알 수 있는 바와 같이 칼라 필터를 하부 및 상품 전극보다 작은 크기로 형성함에 의해 상기 칼라 필터의 가장자리 영역에서 별도의 접촉구 없이도 자연스럽게 연결된다.As can be seen from FIGS. 3 and 4, the color filter is formed to have a smaller size than the lower and commodity electrodes, thereby naturally connecting without an additional contact hole in the edge region of the color filter.
상술한 바와 같이 본 발명은 액정 디스플레이의 칼라 필터에 있어서, 종래와 같이 전극과 칼라 필터를 같은 크기로 형성하여 상부 및 하부전극을 접촉구를 통해 연결하는 대신 전극보다 작은 크기로 칼라 필터를 형성하여 상기 칼라 필터의 가장자리에 인접하는 상하부 전극의 여유분을 연결영역으로 이용함에 의해 상부 전극 형성시 상하부 전극이 서로 연결되도록 하였다. 따라서 종래의 접촉구 형성공정이 없어지게 되어 공정이 용이해지고 그에따라 수율이 향상되는 효과가 있다.As described above, in the color filter of the liquid crystal display, the color filter is formed in a smaller size than the electrode instead of connecting the upper and lower electrodes through the contact hole by forming the electrode and the color filter in the same size as in the prior art. The upper and lower electrodes were connected to each other when the upper electrode was formed by using a margin of the upper and lower electrodes adjacent to the edge of the color filter as the connection region. Therefore, the conventional contact hole forming process is eliminated, thereby facilitating the process and thus improving the yield.
또한 종래에는 칼라 필터의 중앙영역에 형성된 접촉구에 의해 화질이 감소되었으나 본 발명에서는 칼라 필터의 전체면적을 유지하면서 접촉구를 제거함으로써 화질이 개선되는 효과도 있다.In addition, although the image quality is reduced by the contact hole formed in the center area of the color filter in the related art, the image quality is improved by removing the contact hole while maintaining the entire area of the color filter.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019920000530A KR940009159B1 (en) | 1992-01-16 | 1992-01-16 | Color filter of lcd |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019920000530A KR940009159B1 (en) | 1992-01-16 | 1992-01-16 | Color filter of lcd |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR930016816A KR930016816A (en) | 1993-08-30 |
| KR940009159B1 true KR940009159B1 (en) | 1994-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019920000530A KR940009159B1 (en) | 1992-01-16 | 1992-01-16 | Color filter of lcd |
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| Country | Link |
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| KR (1) | KR940009159B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100336638B1 (en) * | 1999-09-21 | 2002-05-16 | 김승돌 | Asynchronous power line transmission apparatus |
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1992
- 1992-01-16 KR KR1019920000530A patent/KR940009159B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR930016816A (en) | 1993-08-30 |
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