KR0142044B1 - Liquid crystal display device - Google Patents

Liquid crystal display device

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Publication number
KR0142044B1
KR0142044B1 KR1019940031964A KR19940031964A KR0142044B1 KR 0142044 B1 KR0142044 B1 KR 0142044B1 KR 1019940031964 A KR1019940031964 A KR 1019940031964A KR 19940031964 A KR19940031964 A KR 19940031964A KR 0142044 B1 KR0142044 B1 KR 0142044B1
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South Korea
Prior art keywords
liquid crystal
color filter
crystal substrate
lcd
display device
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KR1019940031964A
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Korean (ko)
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KR960018673A (en
Inventor
이기종
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엄길용
오리온 전기 주식회사
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Priority to KR1019940031964A priority Critical patent/KR0142044B1/en
Publication of KR960018673A publication Critical patent/KR960018673A/en
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Publication of KR0142044B1 publication Critical patent/KR0142044B1/en

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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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/133528—Polarisers
    • 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
    • G02F1/133357—Planarisation layers
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G02F1/133519—Overcoatings

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

Abstract

본 발명은 액정표시장치에 관한것으로서, 화소전극과 공통전극이 형성되어 있는 하측 및 상측 액정기판을 실패턴으로 접합시키고, 상기 셀갭내에 액정을 채워 밀봉한 LCD에서 칼라필터를 상측 액정기판의 외측면과 편광판의 사이에 형성하였으므로, 투명전극 패턴 형성공정이 간단하므로 LCD자체의 생산이 용이하고, 칼라필터에 의한 단차를 고려하지 않아도 되므로 셀갭의 균일성이 향상되고, 투명전극 패턴의 투과율이 따른 칼라필터의 색표현 범위나 색순도가 향상되어 고화질화에 유리하다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, wherein a lower side and an upper liquid crystal substrate on which a pixel electrode and a common electrode are formed are bonded to each other by a failure turn, and a color filter is sealed on the outer surface of the upper liquid crystal substrate in an LCD in which liquid crystal is filled in the cell gap. Since it is formed between the polarizer and the polarizing plate, the transparent electrode pattern forming process is simple, the LCD itself is easy to produce, and because the step by the color filter is not considered, the uniformity of the cell gap is improved, and the color according to the transmittance of the transparent electrode pattern The color expression range and color purity of the filter are improved, which is advantageous for high image quality.

Description

액정표시장치LCD Display

제1도는 종래 기술에 따른 액정표시장치의 단면도.1 is a cross-sectional view of a liquid crystal display device according to the prior art.

제2도는 본 발명에 따른 액정표시장치의 단면도.2 is a cross-sectional view of a liquid crystal display device according to the present invention.

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

1: 하측 액정기판2: 화소전극1: lower liquid crystal substrate 2: pixel electrode

3: 상측 액정기판4: 공통전극3: upper liquid crystal substrate 4: common electrode

5: 배향막6: 실패턴5: alignment layer 6: failure turn

7: 칼라필터8: 보호막7: color filter 8: protective film

9: 평탄화층10: 편광판9: planarization layer 10: polarizing plate

11: 액정11: liquid crystal

본 발명은 액정표시장치(Liquid Crystal Display; 이하 LCD라 칭함)에 관한 것으로서, 특히 칼라필터를 상측 액정기판과 편광판의 사이에 형성하여 셀캡의 균일성이 향상되고, LCD 제조공정이 간단하며 색순도 및 색표현범위를 향상시킬 수 있는 LCD에 관한것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display (hereinafter referred to as an LCD). In particular, a color filter is formed between an upper liquid crystal substrate and a polarizing plate to improve uniformity of a cell cap, simplify the LCD manufacturing process, It is about LCD which can improve the range of color expression.

평판표시장치(flat pannel display)의 일종인 LCD는 액체의 유동성과 결정의 광학적 성질을 겸비하는 액정에 전계를 가하여 광학적 이방성을 변화시키는 장치로서, 종래 음극선관(Cathode Ray Tube)에 비해 소비전력이 낮고, 부피가 작으며, 대형화 및 고정세화가 가능하여 널리 사용되고 있다.LCD, which is a kind of flat pannel display, is a device that changes the optical anisotropy by applying electric field to liquid crystal that combines liquidity and optical properties of crystal, and consumes more power than conventional cathode ray tube. Its low volume, small size, large size and high definition make it widely used.

일반적으로 LCD는 화소전극이 형성되어 스위칭 소자와 연결되어 있는 하측 액정기판과 공통전극이 형성되어 있는 상측 액정기판의 사이에 액정이 밀봉되어 있는 형태로 구성된다.In general, LCDs are configured in such a manner that liquid crystal is sealed between a lower liquid crystal substrate having pixel electrodes formed therein and connected to a switching element, and an upper liquid crystal substrate having common electrodes formed thereon.

종래 LCD의 제조방법을 살펴보면 다음과 같다.Looking at the manufacturing method of the conventional LCD is as follows.

먼저, 석영재질의 투명기판상에 인듐.틴.옥사이드(indium thin oxide; 이하 ITO라 칭함)로된 화소전극과 투명전극 패턴을 형성하고, 상기 투명 전극 패턴의 단락을 방지하기 위한 보호막과 액정을 배열시키기 위한 배향막을 순차적으로 형성한다.First, a pixel electrode made of indium thin oxide (ITO) and a transparent electrode pattern are formed on a transparent substrate made of quartz, and a protective film and a liquid crystal are formed to prevent a short circuit of the transparent electrode pattern. Alignment films for aligning are formed sequentially.

그다음 상기 배향막에 방향성을 주기 위하여 원통형의 코아에 천이 감겨있는 러빙 롤을 사용하여 실시한 후, 보호막과 칼라필터등을 형성하여 하측 액정기판을 완성한다.Then, using a rubbing roll wound around a cylindrical core to give direction to the alignment layer, a protective film, a color filter, and the like are formed to complete the lower liquid crystal substrate.

그후, 공통전극을 갖는 상측 액정기판을 형성한 후, 상기 상 또는 하측 액정기판상에 접합 및 액정 밀봉을 위한 실패턴을 형성하고, 일정한 셀갭을 유지하기 위한 스페이서를 형성하여 봉합시키고, 셀갭에 액정을 주입하고, 밀봉하여 LCD를 완성한다.Thereafter, after forming an upper liquid crystal substrate having a common electrode, a failure turn for bonding and sealing the liquid crystal is formed on the upper or lower liquid crystal substrate, a spacer is formed to seal a cell gap, and the liquid crystal is sealed in the cell gap. Inject and seal to complete the LCD.

제1도는 종래 LCD의 단면도이다.1 is a cross-sectional view of a conventional LCD.

먼저, 석영이나 유리등과 같은 투명재질의 상.하측 액정기판(3), (1)상에 투명 도전 패턴으로된 공통전극(4)과 화소전극(2)이 각각 형성되어 있으며, 상기 화소전극(2)과 공통전극(4)의 상부에는 배향막(5)이 형성되어있고, 상기 상.하측 액정기판(3), (1)은 예정된 셀갭을 유지하며 실패턴(6)으로 밀봉되어 있으며, 상기 셀갭에는 액정(11)이 채워져 있다.First, a common electrode 4 and a pixel electrode 2 having a transparent conductive pattern are formed on upper and lower liquid crystal substrates 3 and 1 made of a transparent material such as quartz or glass, respectively. (2) and an alignment layer (5) are formed on the common electrode (4), and the upper and lower liquid crystal substrates (3) and (1) maintain a predetermined cell gap and are sealed with a failure turn (6), The cell gap is filled with liquid crystals 11.

또한 상기 하측 액정기판(1)의 화소전극(2)과 액정기판(1)의 사이에는 칼라필터(7)와 절연막(8) 및 평탄화층(9)이 순차적으로 형성되어 있으며, 상.하측 액정기판(3), (1)의 외부에 편광판(10)이 설치되어있다.In addition, a color filter 7, an insulating film 8, and a planarization layer 9 are sequentially formed between the pixel electrode 2 and the liquid crystal substrate 1 of the lower liquid crystal substrate 1. The polarizing plate 10 is provided outside the board | substrates 3 and 1. As shown in FIG.

상기 칼라필터(7)는 감광성 안료를 사용하여 레드(R), 그린(G), 블루(B)가 일정한 방식으로 배열되어 있어 LCD를 칼라화한다.The color filter 7 uses a photosensitive pigment to arrange red (R), green (G), and blue (B) in a predetermined manner to colorize the LCD.

그러나 상기와 같은 종래 기술에 따른 LCD는 칼라필터가 투명전극 패턴의 하부에 형성되어 있으므로, 그 상측의 평탄화층을 평탄하게 연마하여야 하므로 공정이 복잡해지고, 다시 평탄화층상에 투명전극 패턴을 형성하여야 하므로 셀갭의 균일성 유지가 어려워지는 문제점이 있다.However, in the LCD according to the related art, since the color filter is formed under the transparent electrode pattern, the flattening layer on the upper side of the LCD must be smoothly polished, so the transparent electrode pattern must be formed on the flattening layer. There is a problem that it is difficult to maintain uniformity of the cell gap.

또한 투명전극 패턴 자체가 투과율을 가지므로 칼라필터의 색 표현범위와 색순도가 저하되어 LCD의 화질이 나빠지는 문제점이 있다.In addition, since the transparent electrode pattern itself has a transmittance, the color expression range and color purity of the color filter are deteriorated, thereby degrading the quality of the LCD.

본 발명은 상기와 같은 문제점들을 해결하기 위한 것으로서, 본 발명의 목적은 칼라필터를 상측 액정기판의 외측에 형성하여 투명전극 패턴의 형성이 용이하고, 셀갭의 균일성 유지가 용이하며, 화질을 향상시킬 수 있는 LCD를 제공함에 있다.The present invention is to solve the above problems, an object of the present invention is to form a color filter on the outer side of the upper liquid crystal substrate to facilitate the formation of a transparent electrode pattern, to maintain the uniformity of the cell gap, and to improve the image quality To provide an LCD that can be made.

상기와 같은 목적을 달성하기 위한 본 발명에 따른 LCD의 특징은 화소전극과 공통전극 및 배향막이 각각 형성되어 있는 하측 및 상측 액정기판과, 상기 상.하측 액정기판을 예정된 셀갭을 갖도록 봉합시키는 실패턴과, 상기 상측 액정기판의 외측면에 형성되어있는 칼라필터와, 상기 칼라필터를 덮는 평탄화층과, 상기 상측 액정기판의 평탄화층 상부와 하측 액정기판의 외측면에 각각 설치되어 있는 편광판을 구비함에 있다.A feature of the LCD according to the present invention for achieving the above object is a failure turn for sealing the lower and upper liquid crystal substrate, the pixel electrode, the common electrode and the alignment layer are formed, and the upper and lower liquid crystal substrate to have a predetermined cell gap. And a color filter formed on an outer surface of the upper liquid crystal substrate, a planarization layer covering the color filter, and a polarizing plate disposed on an upper surface of the upper liquid crystal substrate and an outer surface of the lower liquid crystal substrate. have.

이하, 본 발명에 따른 LCD에 관하여 첨부도면을 참조하여 상세히 설명한다.Hereinafter, the LCD according to the present invention will be described in detail with reference to the accompanying drawings.

제2도는 본 발명에 따른 LCD의 단면도이다.2 is a cross-sectional view of the LCD according to the present invention.

먼저, 상.하측 액정기판(3), (1)상에 각각 공통전극(4)과 화소전극(2)이 형성되어 있으며, 상기 화소전극(2)과 공통전극(4) 상에는 배향막(5)이 형성되어 있고, 상기 상.하측 액정기판(3), (1)은 예정된 셀갭을 유지하여 실패턴(6)을 봉합되어 있고, 상기 셀갭의 내부에는 액정(11)이 채워져 있다.First, the common electrode 4 and the pixel electrode 2 are formed on the upper and lower liquid crystal substrates 3 and 1, respectively, and the alignment layer 5 is formed on the pixel electrode 2 and the common electrode 4, respectively. Are formed, and the upper and lower liquid crystal substrates 3 and 1 maintain the predetermined cell gap to seal the failure turn 6, and the liquid crystal 11 is filled in the cell gap.

또한 상기 하측 액정기판(1)의 외측면에는 편광판(10)이 부착되어 있으며, 상기 상측 액정기판(3) 외측면의 디스플레이 영역에는 내열성 및 감광성 안료로된 칼라필터(7)가 형성되어 있다.In addition, a polarizing plate 10 is attached to an outer surface of the lower liquid crystal substrate 1, and a color filter 7 made of heat resistant and photosensitive pigment is formed in the display area of the outer surface of the upper liquid crystal substrate 3.

상기 칼라필터(7)의 상부에는 보호막(8)과 평탄화층(9)이 순차적으로 형성되어 있으며, 상기 평탄화층(9)상에 편광판(10)이 부착되어 있다. 이때 상기 보호막(8)을 투명한 절연재질, 예를들어 산화막이나 질화막으로 형성하고, 평탄화층(9)은 투명 아크릴층으로 형성하며, 상기 보호막(8)과 평탄화층(9)을 동일한 막으로 형성할 수도 있다.The passivation layer 8 and the planarization layer 9 are sequentially formed on the color filter 7, and the polarizing plate 10 is attached to the planarization layer 9. At this time, the protective film 8 is formed of a transparent insulating material, for example, an oxide film or a nitride film, the planarization layer 9 is formed of a transparent acrylic layer, and the protective film 8 and the planarization layer 9 are formed of the same film. You may.

이상에서 설명한 바와 같이 본 발명에 따른 LCD는 화소전극과 공통전극이 형성되어 있는 하측 및 상측 액정기판을 실패턴으로 접합시켜 상기 셀갭내에 액정을 채워 밀봉한 LCD에서 칼라필터를 상측 액정기판의 외측면과 편광판의 사이에 형성하였으므로, 투명전극 패턴 형성 공정이 간단하므로 LCD자체의 생산이 용이하고, 칼라필터에 의한 단차를 고려하지 않아도 되므로 셀갭의 균일성이 향상되고, 투명전극 패턴의 투과율이 따른 칼라필터의 색표현 범위나 색순도가 향상되어 고화질화에 유리한 이점이 있다.As described above, in the LCD according to the present invention, a color filter is sealed on the outer surface of the upper liquid crystal substrate in the LCD in which the lower and upper liquid crystal substrates on which the pixel electrode and the common electrode are formed are bonded to each other by fail turn. Since it is formed between the polarizing plate and the transparent electrode pattern forming process is simple, the LCD itself is easy to produce, and because the step by the color filter is not considered, the uniformity of the cell gap is improved and the color according to the transmittance of the transparent electrode pattern The color expression range and color purity of the filter are improved, which is advantageous in increasing the quality.

Claims (4)

화소전극과 공통전극 및 배향막이 각각 형성되어 있는 하측 및 상측 액정기판과, 상기 상.하측 액정기판을 예정된 셀갭을 갖도록 봉합시키는 실패턴과, 상기 상측 액정기판의 외측면에 형성되어있는 칼라필터와, 상기 칼라필터를 덮는 평탄화층과, 상기 상측 액정기판의 평탄화층 상부와 하측 액정기판의 외측면에 각각 설치되어 있는 편광판을 구비하는 액정표시장치.A lower and an upper liquid crystal substrate having pixel electrodes, a common electrode and an alignment layer formed thereon, a failure turn for sealing the upper and lower liquid crystal substrates to have a predetermined cell gap, a color filter formed on an outer surface of the upper liquid crystal substrate; And a polarizing plate disposed on the planarization layer covering the color filter and on an outer surface of the upper and lower liquid crystal substrates of the upper liquid crystal substrate. 제1항에 있어서, 상기 칼라필터와 평탄화층의 사이에 보호막을 개재시킨 액정표시장치.The liquid crystal display device according to claim 1, wherein a protective film is interposed between the color filter and the planarization layer. 제2항에 있어서, 상기 보호막이 산화막이나 질화막인 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to claim 2, wherein the protective film is an oxide film or a nitride film. 제1항에 있어서, 상기 평탄화층이 투명 아크릴로 형성되어 있는 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to claim 1, wherein the planarization layer is made of transparent acrylic.
KR1019940031964A 1994-11-30 1994-11-30 Liquid crystal display device KR0142044B1 (en)

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