KR100315120B1 - Liquid crystal display - Google Patents
Liquid crystal display Download PDFInfo
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- KR100315120B1 KR100315120B1 KR1019990056931A KR19990056931A KR100315120B1 KR 100315120 B1 KR100315120 B1 KR 100315120B1 KR 1019990056931 A KR1019990056931 A KR 1019990056931A KR 19990056931 A KR19990056931 A KR 19990056931A KR 100315120 B1 KR100315120 B1 KR 100315120B1
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- South Korea
- Prior art keywords
- driving chip
- liquid crystal
- crystal display
- substrate
- recess
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 34
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 239000000565 sealant Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 229920002457 flexible plastic Polymers 0.000 abstract description 3
- 239000002985 plastic film Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13454—Drivers integrated on the active matrix substrate
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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
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
-
- 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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
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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)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
목적 : 플렉시블한 플라스틱 기판에 COP 방식으로 구동 칩을 실장한 액정표시장치에 관한 것이다.PURPOSE: It relates to a liquid crystal display device in which a driving chip is mounted on a flexible plastic substrate by a COP method.
구성 : 전극 및 절연층이 형성된 상·하부 기판을 접착하고, 그 사이에 액정을 주입 밀봉하여 얻어지는 액정표시장치에 있어서, 상기 하부 기판 상에 구동 칩을 실장하되, 상기 구동 칩의 둘레로 일정 간격을 유지하면서 감싸도록 상기 상부 기판의 일부를 절취하여 요부를 형성하고, 상기 구동 칩과 요부의 사이에 실란트를 채워 고정한다.Composition: A liquid crystal display device obtained by adhering an upper and lower substrate on which an electrode and an insulating layer are formed, and injecting and sealing a liquid crystal therebetween, in which a driving chip is mounted on the lower substrate, but at a predetermined interval around the driving chip. A portion of the upper substrate is cut to form a recess to cover the upper substrate, and a sealant is filled and fixed between the driving chip and the recess.
효과 : 구동 칩을 가이드하는 요부를 형성하고, 상기 요부와 구동 칩의 사이에 실란트를 채워 고정함으로써, 구동 칩을 정확하게 마운팅하고 외부 충격에 대한 구동 칩을 보호할 수 있다.Effect: By forming a recess for guiding the driving chip and filling and sealing a sealant between the recess and the driving chip, the driving chip can be accurately mounted and the driving chip can be protected against external impact.
Description
본 발명은 박판의 플라스틱 필름을 기판으로 사용하는 플라스틱 액정표시장치에 관한 것으로, 특히 상기 플라스틱 기판에 구동 칩을 실장함에 있어 상기 구동칩을 보호하고 신뢰성을 향상시킬 수 있도록 한 실장 구조에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic liquid crystal display device using a thin plastic film as a substrate, and more particularly, to a mounting structure capable of protecting the driving chip and improving reliability in mounting the driving chip on the plastic substrate.
액정표시소자는 외부로부터 인가되는 전압에 의해 액정의 꼬임각이 변화되는 유전이방성을 이용하여, 백라이트 혹은 외부로부터 조사된 광(光)을 선택적으로 투과시키거나 반대로 투과되지 않게 함으로써 문자나 숫자 및 화상을 표시한다.The liquid crystal display device uses dielectric anisotropy in which the twist angle of the liquid crystal is changed by a voltage applied from the outside, and selectively transmits or transmits light irradiated from the backlight or the outside or vice versa. Is displayed.
이러한 액정표시소자는 시각 정보에 대한 다양한 요구와 미래형 디스플레이로서의 역할을 견지하기 위해 초경량화 및 초슬림화되고 있으며, 그 결과로 폴리아미드와 같은 플렉시블한 플라스틱 필름을 사용하여 상, 하부의 기판을 구성한 플라스틱 액정표시장치(PLCD)가 소개되어 있다.These liquid crystal display devices are ultra-lightweight and ultra-slim in order to maintain various demands for visual information and to serve as future displays, and as a result, plastics comprising upper and lower substrates using flexible plastic films such as polyamide Liquid crystal display (PLCD) is introduced.
도 3 및 도 4에 도시한 바와 같이 플라스틱 액정표시장치는 2매의 플라스틱 기판(2)(2′)의 내측 대향면에 각각 투명전극 및 배향층을 형성하고, 실란트를 이용하여 상, 하부의 기판(2)(2′)을 상호 접착하며, 그 사이 공간에 액정을 주입한 후 밀봉하므로 형성되어진다.As shown in FIGS. 3 and 4, the plastic liquid crystal display device forms transparent electrodes and alignment layers on the inner facing surfaces of the two plastic substrates 2 (2 ′), respectively, and uses the sealant to form upper and lower layers. The substrates 2 and 2 'are bonded to each other and formed by injecting liquid crystal into the space therebetween and sealing them.
이와 같이 구성된 액정표시장치는 구동회로기판 및 백라이트와 함께 조립되어 모듈화 되는바, 근래에는 액정표시장치의 소형, 박형, 고화질화에 맞추어 실장기술도 함께 발달하고 있으며, 그 일 예로서 도면에 표시한 바와 같이 액정표시장치의 한쪽 기판(2′) 상에 직접 구동 칩(4)을 설치하는 COP(chip on plastic) 기술이 소개되어 있다.The liquid crystal display device configured as described above is modularized by being assembled with a driving circuit board and a backlight. In recent years, the mounting technology is also developed in accordance with the miniaturization, thinness, and high image quality of the liquid crystal display device. Similarly, a chip on plastic (COP) technology in which a driving chip 4 is directly provided on one substrate 2 'of a liquid crystal display is introduced.
이에 따라 외부에서 입력된 구동 시그널은 구동 칩(4)을 통하여 각 기판(2)(2′)에 형성된 투명전극으로 인가되고, 그 사이에 주입된 액정 물질을 소정의 각도로 트위스트시킴으로써 디스플레이를 구현하게 된다.Accordingly, the driving signal input from the outside is applied to the transparent electrodes formed on the substrates 2 and 2 'through the driving chip 4, and the display is realized by twisting the liquid crystal material injected therebetween at a predetermined angle. Done.
이를 위하여 종래의 액정표시장치에서는 구동 칩(4)이 설치될 부분만큼 상부 기판(2)의 일측 변을 길게 절단하여 제거하고, 하부 기판(2′)의 해당 부분에 구동 칩(4)을 실장하게 된다.To this end, in the conventional liquid crystal display device, one side of the upper substrate 2 is cut and removed as much as the portion where the driving chip 4 is to be installed, and the driving chip 4 is mounted on the corresponding portion of the lower substrate 2 '. Done.
그러나 종래의 실장 방식은 유리기판을 사용하는 액정표시장치의 COG(chip on glass) 방식을 그대로 적용한 것으로, 플렉스블한 기판을 사용하는 플라스틱 액정표시장치에는 적합하지 않은 문제점이 있다. 예를 들어 종래 방식에 의하면 플렉스블한 기판상에서 특히 극소화된 투명전극에 맞추어 구동 칩(4)을 정확하게 마운팅하기 어렵고, 구동 칩(4)이 외부로 노출되어 있기 때문에 작은 충격에도 쉽게 손상되는 문제점이 있다.However, the conventional mounting method adopts a COG (chip on glass) method of a liquid crystal display device using a glass substrate as it is, and is not suitable for a plastic liquid crystal display device using a flexible substrate. For example, according to the conventional method, it is difficult to mount the driving chip 4 precisely on a flexible substrate, in particular, to minimized transparent electrodes, and the driving chip 4 is exposed to the outside, so that it is easily damaged even with a small impact. have.
앞서 설명한 종래 기술의 문제점을 해결하기 위한 것으로서, 본 발명은 플렉시블한 기판을 사용하는 플라스틱 액정표시장치에 적합하게, 상기 플렉시블 기판에 구동 칩을 용이하고 정확하게 마운팅할 수 있도록 하며, 아울러 외부 충격으로부터 상기 구동 칩을 보호할 수 있도록 함에 그 목적을 두고 있다.In order to solve the problems of the prior art described above, the present invention makes it possible to mount the driving chip on the flexible substrate easily and accurately, suitable for the plastic liquid crystal display device using the flexible substrate, The purpose is to protect the driving chip.
이를 위하여 본 발명에서는 전극 및 절연층이 형성된 상·하부 기판을 접착하고, 그 사이에 액정을 주입 밀봉하여 액정표시장치를 형성함에 있어서, 상기 하부 기판 상에 구동 칩(drive IC)을 실장하되, 상기 구동 칩의 둘레로 일정 간격을 유지하면서 감싸도록 상기 상부 기판의 일부를 절취하여 요부를 형성하고, 상기 구동 칩과 요부의 사이에 실란트를 채워 고정한 구성을 제안한다.To this end, in the present invention, a drive chip is mounted on the lower substrate when the upper and lower substrates on which the electrode and the insulating layer are formed are bonded, and the liquid crystal is injected and sealed therebetween to form a liquid crystal display device. A concave portion is formed by cutting a portion of the upper substrate so as to surround the driving chip while maintaining a predetermined gap, and a sealant is fixed by filling a sealant between the driving chip and the recess.
여기서 상·하부 기판은 플렉시블한 플라스틱 기판을 사용하며, 실란트는 실리콘 및 수지 중에서 하나를 사용하여 고정할 수 있다.yHere, the upper and lower substrates use a flexible plastic substrate, and the sealant can be fixed by using one of silicone and resin.
도 1은 본 발명에 의한 액정표시장치의 평면 구성도.1 is a plan view of a liquid crystal display device according to the present invention;
도 2는 도 1의 A-A 선을 절취 도시한 단면도.Figure 2 is a cross-sectional view taken along the line A-A of Figure 1;
도 3은 종래 공지된 액정표시장치의 평면 구성도.3 is a plan view illustrating a conventionally known liquid crystal display device.
도 4는 종래 공지된 액정표시장치의 단면도.4 is a cross-sectional view of a conventionally known liquid crystal display device.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
4-구동 칩 20-상부 기판4-drive chip 20-top board
20′-하부 기판 22,22′-투명전극20'-bottom substrate 22,22'-transparent electrode
24,28-실란트 26-요부24,28-sealant 26-part
32-도전재32-conductive material
이하, 본 발명을 실현하기 위한 바람직한 실시예를 첨부 도면에 의거하여 설명한다.Best Mode for Carrying Out the Invention Preferred embodiments for realizing the present invention will be described below with reference to the accompanying drawings.
도 1 및 도 2는 본 발명에 의한 액정표시장치를 도시한 평면도 및 단면도이다. 참고로 본 발명을 설명함에 있어 종래 기술에서 인용된 도면과 동일한 구성에 대하여는 동일한 부호를 사용한다.1 and 2 are a plan view and a cross-sectional view showing a liquid crystal display device according to the present invention. For reference, in describing the present invention, the same reference numerals are used for the same configurations as those of the drawings cited in the related art.
본 발명의 액정표시장치는 플렉시블한 특성이 있는 플라스틱 필름을 상·하부 기판(20)(20′)으로 사용하고, 상·하부 기판(20)(20′)의 내측 대향면에는 각각 적어도 투명전극(22)(22′) 및 배향층을 형성하며, 실란트(24)를 이용하여 상, 하부의 기판(20)(20′)을 접착하고 그 사이 공간에 액정을 주입 밀봉하여 이루어진다.In the liquid crystal display of the present invention, a plastic film having flexible characteristics is used as the upper and lower substrates 20 (20 '), and at least transparent electrodes are disposed on inner facing surfaces of the upper and lower substrates 20 (20'). (22) (22 ') and an orientation layer are formed, and the upper and lower substrates (20, 20') are adhered using the sealant 24, and liquid crystal is injected and sealed in the space therebetween.
여기서 하부 기판(20′) 상에는 COP 방식에 의해 구동 칩(4)을 실장하는 바, 이를 위하여 상·하부 기판(20)(20′)의 접착 전에 구동 칩(4)이 설치될 공간을 미리 확보한다.In this case, the driving chip 4 is mounted on the lower substrate 20 'by a COP method. For this purpose, a space in which the driving chip 4 is to be installed before adhesion of the upper and lower substrates 20 and 20' is secured in advance. do.
본 발명에서는 상기 공간을 확보함에 있어 구동 칩(4)의 마운팅을 용이하게 하고 실장후 상기 구동 칩(4)을 보호할 수 있도록 하기 위해, 상부 기판(20)의 일부를 절취하여 상기 구동 칩(4)의 둘레로 일정 간격을 유지하면서 그 주변을 감싸도록 한 요부(26)를 형성한다. 요부(26)의 형성은 유리기판을 사용하는 것과 달리 플라스틱 필름을 기판으로 사용하므로 가공성이 용이하며, 펀칭에 의해 실현할 수 있다.In the present invention, in order to facilitate the mounting of the driving chip 4 in order to secure the space and to protect the driving chip 4 after mounting, a portion of the upper substrate 20 is cut out to form the driving chip ( The recess 26 is formed so as to surround the periphery while maintaining a constant distance around the 4). The formation of the recess 26 is made of a plastic film as the substrate, unlike the glass substrate, and easy to process, and can be realized by punching.
이와 같이 형성된 요부(26)는 구동 칩(4)을 실장할 때 가이드 역할을 하여 투명전극(22′)과 구동 칩 단자(4a)의 정확한 연결을 돕는다. 또 상기 구동 칩(4) 둘레와 요부(26)의 사이에는 실란트(28)를 채워 넣어 고정한다.The recess 26 formed as described above serves as a guide when mounting the driving chip 4 to assist the transparent electrode 22 'and the driving chip terminal 4a to be accurately connected. In addition, a sealant 28 is filled and fixed between the driving chip 4 and the recess 26.
따라서 상기 구동 칩(4)은 상부 기판(20)의 요부(26)와 실란트(28)에 의해 감싸여져 보호되고, 외부로부터 가해지는 충격에 대하여 내구성을 유지할 수 있다.Accordingly, the driving chip 4 may be wrapped and protected by the recess 26 and the sealant 28 of the upper substrate 20, and may maintain durability against impact from the outside.
이에 따라 본 발명의 액정표시장치는 컨넥터(30)를 통하여 입력된 구동 시그널이 구동 칩(4)으로 전해지고, 다시 구동 칩 단자(4a)를 통하여 투명전극(22′)으로 인가되며, 또한 투명전극(22′)과 도전재(32)를 통하여 상부 기판(20)의 투명전극(22)으로 인가됨에 의해, 상호 교차된 상·하부 기판(20)(20′)의 투명전극(22)(22′) 사이에 전계를 형성하며, 그 사이에 주입된 액정을 소정의 각도로 트위스트시킴에 따라 백라이트 및 반사광을 선택정으로 투과시킴으로써 디스플레이를 구현할 수 있다.Accordingly, in the liquid crystal display of the present invention, the driving signal input through the connector 30 is transmitted to the driving chip 4 and is again applied to the transparent electrode 22 'through the driving chip terminal 4a. The transparent electrodes 22 and 22 of the upper and lower substrates 20 and 20 'intersected with each other by being applied to the transparent electrode 22 of the upper substrate 20 through the 22' and the conductive material 32. The display can be realized by forming an electric field between '' and twisting the liquid crystal injected therebetween at a predetermined angle to selectively transmit the backlight and the reflected light.
이상에서 설명한 실시예를 통하여 알 수 있는 바와 같이, 본 발명의 액정표시장치는 플렉시블 기판의 용이한 가공성을 이용하여 구동 칩을 감싸는 요부를 형성하고, 상기 요부와 구동 칩의 사이에 실란트를 채워 고정함으로써, 상기 구동 칩의 정확한 마운팅을 달성하고 외부 충격에 대한 구동 칩의 보호를 실현하는 효과를 얻을 수 있다.As can be seen through the embodiments described above, the liquid crystal display device of the present invention forms a recessed portion surrounding the driving chip by using the easy processability of the flexible substrate, and is fixed by filling the sealant between the recessed portion and the driving chip. Thus, the effect of achieving accurate mounting of the drive chip and realizing protection of the drive chip against external impact can be obtained.
또한 본 발명에 의하면 실장시 구동 칩을 가이드하므로 생산성을 향상시키는 효과도 얻을 수 있다.In addition, according to the present invention, since the driving chip is guided during mounting, the effect of improving productivity is obtained.
Claims (3)
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| KR1019990056931A KR100315120B1 (en) | 1999-12-11 | 1999-12-11 | Liquid crystal display |
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