KR100870002B1 - Liquid crystal display - Google Patents

Liquid crystal display Download PDF

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KR100870002B1
KR100870002B1 KR1020010080004A KR20010080004A KR100870002B1 KR 100870002 B1 KR100870002 B1 KR 100870002B1 KR 1020010080004 A KR1020010080004 A KR 1020010080004A KR 20010080004 A KR20010080004 A KR 20010080004A KR 100870002 B1 KR100870002 B1 KR 100870002B1
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liquid crystal
light blocking
driving chip
crystal display
blocking film
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KR1020010080004A
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Korean (ko)
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KR20030049705A (en
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이성호
명재훈
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삼성전자주식회사
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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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • 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
    • G02F1/133345—Insulating 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
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G02F1/13452—Conductors connecting driver circuitry and terminals of panels
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133334—Electromagnetic shields
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • G02F1/136295—Materials; Compositions; Manufacture processes
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/123—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode pixel

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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)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)

Abstract

본 발명은 액정 표시 장치에 관한 것으로서, 공정의 단순화 및 오동작 방지를 위해 상기 광차단막을 하부기판의 정면에 외부의 접지 단자와 연결되도록 형성한다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, wherein the light blocking film is formed to be connected to an external ground terminal on the front of the lower substrate in order to simplify the process and prevent malfunction.

본 발명에 따른 액정표시장치는, 투명 기판의 정면에 실장되는 액정 구동칩과 적어도 일부분이 중첩되도록 형성되어 있는 광차단막을 포함하며, 광차단막은 외부의 접지 단자와 연결된다. 여기서, 광차단막은 투명 기판에 형성되는 도전 배선 중의 적어도 어느 하나와 동일한 층에 동일한 물질로 형성되며, 도전 배선은 게이트 배선 및 데이터 배선을 포함한다. The liquid crystal display according to the present invention includes a light blocking film formed to overlap at least a portion of the liquid crystal driving chip mounted on the front surface of the transparent substrate, and the light blocking film is connected to an external ground terminal. Here, the light blocking film is formed of the same material on the same layer as at least one of the conductive wirings formed on the transparent substrate, and the conductive wiring includes a gate wiring and a data wiring.

이로 인해, 액정 구동칩의 오동작 방지를 위한 차광 수단을 별도의 공정을 통하여 형성하지 않아도 되므로 공정을 간소화하여 생산성을 향상시킬 수 있다. 뿐만 아니라, 광차단막으로 하여금 정전 차폐막의 역할도 겸하도록 할 수 있으며, 반대로, 외부의 전자계도 광차단막에 의하여 차폐되어 액정 구동칩에 이르지 못하도록 할 수 있다.Therefore, the light shielding means for preventing the malfunction of the liquid crystal driving chip does not have to be formed through a separate process, thereby simplifying the process and improving productivity. In addition, the light shielding film may serve as a static shielding film, and conversely, an external electromagnetic field may be shielded by the light blocking film to prevent the liquid crystal driving chip.

액정 표시 장치, 액정 구동칩, 광차단막, 범프(bump).Liquid crystal display, liquid crystal driving chip, light blocking film, bump.

Description

액정 표시 장치 {LIQUID CRYSTAL DISPLAY} Liquid crystal display {LIQUID CRYSTAL DISPLAY}

도 1은 본 발명의 일 실시예에 따른 액정 표시 장치의 개략도이다. 1 is a schematic diagram of a liquid crystal display according to an exemplary embodiment of the present invention.

도 2는 도 1의 Ⅰ-Ⅰ' 절단선에 대한 단면도이다.FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

도 3은 도 2의 단면도에 대한 평면도이다.3 is a plan view of the cross-sectional view of FIG.

※ 도면의 주요 부분에 대한 부호의 설명 ※※ Explanation of code about main part of drawing ※

10 : 액정표시장치10: liquid crystal display device

20 : 게이트 전극20: gate electrode

22 : 액정 구동칩22: liquid crystal driving chip

24 : 범프(bump)24: bump

80 : 소스 전극80: source electrode

90 : 드레인 전극90: drain electrode

100 : 광차단막100: light blocking film

110 : 보호막110: shield

150 : 상부기판 150: upper substrate

160 : 하부기판160: lower substrate

본 발명은 액정 표시 장치에 관한 것이다.The present invention relates to a liquid crystal display device.

일반적으로 액정 표시 장치는 박막 트랜지스터와 화소 전극 등이 형성되어 있는 하판과 화소 전극에 대응하는 색 필터와 공통 전극 등이 형성되어 있는 상판 사이에 액정 물질을 주입해 놓고 두 전극 사이에 전압을 인가하여 전기장을 형성하여 액정 분자들의 배열을 변경시키고, 이를 통해 빛의 투과율을 조절함으로써 화상을 표시하는 장치이다.In general, a liquid crystal display device injects a liquid crystal material between a lower plate on which a thin film transistor, a pixel electrode, and the like are formed, and an upper plate on which a color filter and a common electrode, etc., corresponding to the pixel electrode are formed, and applies a voltage between the two electrodes. It is a device that displays an image by forming an electric field to change the arrangement of liquid crystal molecules, and thereby controlling the transmittance of light.

이러한 액정 표시 장치는 액정을 구동하기 위해 실리콘 기판에 집적된 구동회로를 사용하는데, 실리콘의 내부에 존재하는 전자와 정공은 실리콘에 조사된 빛 에너지에 의해 활성화되며 이들 전자와 정공은 자유전자와 자유정공이 되어 광전자의 기동력을 발생시키고 전류가 흐르는 성질이 있다. Such a liquid crystal display uses a driving circuit integrated on a silicon substrate to drive a liquid crystal. The electrons and holes present in the silicon are activated by light energy irradiated on the silicon, and these electrons and holes are free electrons and free electrons. It becomes a hole to generate the mobility of the optoelectronics and has the property that the current flows.

따라서, 액정 표시 장치 중 액정표시패널에 액정의 구동신호를 공급하는 구동 회로칩을 실장할 때 베어칩(bare chip) 자체에 범퍼를 형성한 후 금속화된 패널에 실장하는 COG(Chip On Glass) 모듈의 경우, 위와 같은 실리콘 특성 때문에 구동회로에 빛이 닿으면 실리콘이 이를 흡수하여 이로 인한 누설 전류의 증가로 제기능을 상실하게 된다.Therefore, when mounting a driving circuit chip for supplying a driving signal of a liquid crystal to a liquid crystal display panel of a liquid crystal display device, a bumper is formed on a bare chip itself and then mounted on a metallized panel. In the case of the module, when the light hits the driving circuit due to the above silicon characteristics, the silicon absorbs it and loses its function due to the increase of the leakage current.

즉, 종래 기술에 따른 액정 구동칩의 경우, 하판 글래스에 실장된 액정 구동칩이 광원으로부터 오는 직사광과 상기 하판 글래스 하부의 반사판에 의한 반사광에 노출되어 광누설 전류가 발생하고 이로 인하여 기능을 상실할 우려가 크다.That is, in the case of the liquid crystal driving chip according to the prior art, the liquid crystal driving chip mounted on the lower glass is exposed to the direct light coming from the light source and the reflected light by the reflecting plate under the lower glass, so that light leakage current is generated and thereby the function is lost. There is great concern.

직사광과 반사광을 차단하기 위해 라이트 프루프 실리콘 검(light-proof silicon gum)과 라이트 프루프 테잎(light-proof tape)을 사용하더라고 이들이 완전한 불투명체가 아니기 때문에 빛을 100% 차단할 수 없다. 따라서, 이들을 채용하더라도 광누설 전류로 인한 액정표시장치의 오동작은 여전히 존재한다. 특히, 휴대폰과 같이 실외에서 사용하는 제품의 경우 그 정도가 더욱 심하다.Even if light-proof silicon gum and light-proof tape are used to block direct and reflected light, they cannot block 100% of the light because they are not completely opaque. Therefore, even if these are employed, the malfunction of the liquid crystal display device due to the light leakage current still exists. In particular, the product is more severe when used outdoors such as a mobile phone.

또한, 액정 구동칩마다 차광막(또는 차광 테잎)을 배치하기 위하여 별도의 작업을 필요로 한다. 따라서, 액정 표시 장치의 제작 공정이 복잡해지고 이로 인해 생산성 저하 및 생산 비용이 증가된다.In addition, in order to arrange a light shielding film (or a light shielding tape) for each liquid crystal driving chip, a separate operation is required. Therefore, the manufacturing process of the liquid crystal display device is complicated, thereby lowering productivity and increasing production cost.

본 발명이 이루고자 하는 기술적 과제는 상기의 문제점을 해결하기 위해 창출된 것으로서, 액정 구동칩의 오동작 방지를 위한 광차단막을 별도의 공정 없이 형성하기 위한 것이다.The technical problem to be achieved by the present invention is to solve the above problems, it is to form a light blocking film for preventing the malfunction of the liquid crystal driving chip without a separate process.

또한, 상기 액정 구동칩을 회로물과 기타 외부로부터 인입되는 전자계로부터 보호하기 위한 것이다. In addition, to protect the liquid crystal driving chip from the circuit and other electromagnetic fields introduced from the outside.

본 발명은 이러한 기술적 과제를 해결하기 위하여, 광차단막을 하부기판의 정면에 외부의 접지단자와 연결되도록 형성한다.In order to solve the technical problem, the present invention is formed so that the light blocking film is connected to the external ground terminal on the front of the lower substrate.

구체적으로 본 발명에 따른 액정표시장치는, 정면과 후면으로 이루어진 투명 기판; 투명 기판의 정면에 형성되어 있는 투명전극 패턴; 투명전극 패턴과 연결되어 있는 도전 배선; 도전 배선의 일측에 형성되어 있는 접촉 패드; 접촉 패드와 연결되어 있으며 투명 기판의 정면에 실장되어 있는 액정 구동칩; 및 투명 기판의 정 면에 형성되어 있으며 액정 구동칩과 적어도 일부분이 중첩되도록 형성되어 있는 광차단막을 포함하며, 광차단막은 외부의 접지 단자와 연결되는 특징으로 한다.Specifically, the liquid crystal display device according to the present invention, a transparent substrate consisting of the front and rear; A transparent electrode pattern formed on the front surface of the transparent substrate; Conductive wiring connected to the transparent electrode pattern; A contact pad formed on one side of the conductive wiring; A liquid crystal driving chip connected to the contact pad and mounted on the front surface of the transparent substrate; And a light blocking film formed on the front surface of the transparent substrate and formed to overlap at least a portion of the liquid crystal driving chip, wherein the light blocking film is connected to an external ground terminal.

여기서, 도전 배선은 게이트 배선 및 데이터 배선을 포함하고, 광차단막은 상기 도전 배선 중의 적어도 어느 하나와 동일한 층에 동일한 물질로 형성되는 것을 특징으로 한다. 이로 인해, 액정 구동칩의 오동작 방지를 위한 차광 수단을 별도의 공정을 통하여 형성하지 않아도 되므로 공정을 간소화하여 생산성을 향상시킬 수 있다. Here, the conductive wiring includes a gate wiring and a data wiring, and the light blocking film is formed of the same material on the same layer as at least one of the conductive wirings. Therefore, the light shielding means for preventing the malfunction of the liquid crystal driving chip does not have to be formed through a separate process, thereby simplifying the process and improving productivity.

뿐만 아니라, 광차단막으로 하여금 정전 차폐막의 역할도 겸하도록 할 수 있으며, 반대로, 외부의 전자계도 광차단막에 의하여 차폐되어 액정 구동칩에 이르지 못하도록 할 수 있다.In addition, the light shielding film may serve as a static shielding film, and conversely, an external electromagnetic field may be shielded by the light blocking film to prevent the liquid crystal driving chip.

이하 첨부된 도면을 참조하여 본 발명을 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 액정 표시 장치의 개략도이고, 도 2는 도 1의 Ⅰ-Ⅰ' 절단선에 대한 단면도이고, 도 3은 도 2의 단면도에 대한 평면도이다.1 is a schematic view of a liquid crystal display according to an exemplary embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1, and FIG. 3 is a plan view of the cross-sectional view of FIG. 2.

우선, 본 발명의 일 실시예에 따른 액정표시장치의 전체적인 구조에 대하여 설명한다.First, the overall structure of a liquid crystal display according to an embodiment of the present invention will be described.

도 1을 보면, 상, 하부기판 사이의 실패턴(미도시)에 의해 액정(미도시)이 밀봉되어 있는 액정표시장치(10)를 형성하고, 상기 하부기판의 연장되어 있는 일측에는 구동 소자인 액정 구동칩(데이터/게이트 구동칩, 22)이 실장되어 있다.Referring to FIG. 1, a liquid crystal display device 10 in which liquid crystals (not shown) are sealed by a failure turn (not shown) between upper and lower substrates, and one side of the lower substrate is a driving element. A liquid crystal drive chip (data / gate drive chip 22) is mounted.

여기서 상기 하부기판에는 투명 전극 패턴으로 된 화소전극(미도시)과 이와 연결되는 게이트선, 데이터 선 등의 금속 배선(미도시)이 형성되어 있고, 상기 금속 배선의 일측에는 외부 회로와의 연결을 위한 접촉 패드들이 형성되어 있으며, 하부기판의 접촉 패드에는 액정 구동칩(22)의 접촉 단자와 범프(24)를 통하여 연결되어 있다. Here, the lower substrate is formed with a pixel electrode (not shown) having a transparent electrode pattern and a metal wire (not shown) connected to the gate line and a data line connected thereto, and one side of the metal wire is connected to an external circuit. Contact pads are formed, and the contact pads of the lower substrate are connected to the contact terminals of the liquid crystal driving chip 22 through the bumps 24.

이때, 상기 범프(24)에 의한 연결 외에도 본딩 와이어(bonding wire)를 이용하여 액정 구동칩(22)의 접촉 단자와 하부기판(12)의 접촉 패드들을 연결할 수도 있다. In this case, in addition to the connection by the bump 24, the contact terminal of the liquid crystal driving chip 22 and the contact pads of the lower substrate 12 may be connected using a bonding wire.

다음, 상기와 같은 구조를 이루는 액정표시장치의 하부 기판에 대해 상세히 설명하면 다음과 같다.Next, the lower substrate of the liquid crystal display device having the above structure will be described in detail.

도 2를 보면, 유리 등의 투명한 재질로 이루어진 제1 절연 기판(160) 위에는 주사 신호를 전달하는 게이트선(미도시) 및 게이트선에 연결되어 있는 박막 트랜지스터의 게이트 전극(20)이 형성되어 있다. 게이트선 및 게이트 전극(20) 위에는 게이트 절연막(40)이 형성되어 있다.Referring to FIG. 2, a gate line (not shown) for transmitting a scan signal and a gate electrode 20 of a thin film transistor connected to the gate line are formed on the first insulating substrate 160 made of a transparent material such as glass. . The gate insulating film 40 is formed on the gate line and the gate electrode 20.

게이트 전극(20) 상부의 게이트 절연막(40) 위에는 비정질 규소층(50)이 형성되어 있고, 그 위에는 n+ 비정질 규소로 된 저항 접촉층(71, 72)이 형성되어 있다. 저항 접촉층(71, 72) 위에는 각각 소스 전극(80)과 드레인 전극(90)이 형성되어 있다.An amorphous silicon layer 50 is formed on the gate insulating film 40 on the gate electrode 20, and ohmic contact layers 71 and 72 made of n + amorphous silicon are formed thereon. The source electrode 80 and the drain electrode 90 are formed on the ohmic contact layers 71 and 72, respectively.

여기서, 게이트 전극(20), 소스 전극(80), 드레인 전극(90), 게이트 절연막(40), 저항 접촉층(71, 72) 및 비정질 규소층(50)은 박막 트랜지스터(TFT)를 이루며, 소스 전극(80)과 드레인 전극(90) 사이의 비정질 규소층(50)은 TFT의 채널 부가 된다. 즉, 게이트선을 통하여 게이트 전극(20)에 주사 신호가 인가되면, 박막 트랜지스터가 턴온(turn on)되고, 이에 따라 데이터선을 통하여 소스 전극(80)에 인가된 화상 신호가 비정질 규소층(50)을 통과하여 드레인 전극(90)으로 전달된다. Here, the gate electrode 20, the source electrode 80, the drain electrode 90, the gate insulating film 40, the ohmic contact layers 71 and 72, and the amorphous silicon layer 50 form a thin film transistor (TFT). An amorphous silicon layer 50 between the source electrode 80 and the drain electrode 90 is added to the channel of the TFT. That is, when the scan signal is applied to the gate electrode 20 through the gate line, the thin film transistor is turned on, and thus the image signal applied to the source electrode 80 through the data line is transferred to the amorphous silicon layer 50. Is passed to the drain electrode 90.

소스 전극(80) 및 드레인 전극(90)의 위에는 보호막(110)이 형성되어 있고, 보호막(110) 위에는 게이트선(미도시)과 데이터선(미도시)의 교차에 의하여 정의되는 화소 영역마다 ITO로 이루어진 화소 전극(140)이 형성되어 있다. A passivation layer 110 is formed on the source electrode 80 and the drain electrode 90, and the ITO is formed on the passivation layer 110 for each pixel region defined by the intersection of a gate line (not shown) and a data line (not shown). The pixel electrode 140 is formed.

화소 전극(140)은 접촉 구멍(미도시)을 통해 드레인 전극(90)과 연결되어 있으며, 화상 신호를 인가받아 액정 분자를 구동한다.The pixel electrode 140 is connected to the drain electrode 90 through a contact hole (not shown), and receives the image signal to drive the liquid crystal molecules.

상기와 같은 구조를 이루는 액정표시장치용 하부기판(160)은 상부기판(150)과 대향하고 있으며, 하부기판(160)과 상부기판(150)간의 일정 셀 간격은 스페이서(190)를 통해 유지한다.The lower substrate 160 for the liquid crystal display device having the above structure faces the upper substrate 150, and a predetermined cell gap between the lower substrate 160 and the upper substrate 150 is maintained through the spacer 190. .

이러한 구조의 액정표시장치용 하부기판(160)에는 빛에 의한 액정 구동칩(22)의 오동작 방지를 위한 광차단막(Metal layer, 100)이 형성되어 있다. 그 형성 위치는 소스/드레인 전극(80, 90)을 형성하는 층과 동일한 층에 소스/드레인 전극(80, 90)과 동일한 물질(예를 들어, Al, Cr 등)로 형성하거나 또는 게이트 전극(20)을 형성하는 층에 게이트 전극(20)과 동일한 물질로 형성한다.The lower substrate 160 for the liquid crystal display device having the above structure is provided with a light blocking layer 100 to prevent malfunction of the liquid crystal driving chip 22 by light. The formation position is formed of the same material as the source / drain electrodes 80 and 90 (for example, Al, Cr, etc.) on the same layer as the source / drain electrodes 80 and 90, or the gate electrode ( 20 is formed of the same material as the gate electrode 20 in the layer forming.

필요에 따라서는 소스/드레인 전극(80, 90)층 및 게이트 전극(20)층 모두에 광차단막(100) 패턴을 형성할 수도 있다.If necessary, the light blocking film 100 pattern may be formed on both the source / drain electrodes 80 and 90 and the gate electrode 20 layer.

이렇게 하면, 액정 구동칩마다 설치하였던 차광 테잎 또는 각종 빛 차단 수단을 별도의 공정을 통하여 형성하지 않아도 되므로, 공정을 간소화하여 생산성을 향상시킬 수 있다.In this case, the light shielding tape or various light blocking means provided for each liquid crystal driving chip need not be formed through a separate process, thereby simplifying the process and improving productivity.

또한, 광차단막(100)은 하부기판(10)에 실장되는 액정 구동칩(22)과는 절연되어 있고 외부의 GND 라인(도 3의 101)과 연결되어 있다. 따라서, 액정 구동칩(22)으로부터 노이즈가 발생하더라도 이는 광차단막(100)에 흡수되어 GND 라인(101)을 통해 유출된다.In addition, the light blocking film 100 is insulated from the liquid crystal driving chip 22 mounted on the lower substrate 10, and is connected to an external GND line (101 in FIG. 3). Therefore, even if noise is generated from the liquid crystal driving chip 22, it is absorbed by the light blocking film 100 and flows out through the GND line 101.

이와 같이, 광차단막(100)을 접지해둠으로써, 광차단막(100)으로 하여금 정전 차폐막의 역할도 겸하도록 한다.As such, by grounding the light blocking film 100, the light blocking film 100 also serves as a static shielding film.

반대로, 외부의 전자계도 광차단막(100)에 의하여 차폐되어 액정 구동칩(22)에 이르지 못한다.On the contrary, the external electromagnetic field is also shielded by the light blocking film 100 and thus does not reach the liquid crystal driving chip 22.

이로 인해, 액정 구동칩(22)에서 유출되는 노이즈로부터 여타의 회로물들을 보호할 뿐만 아니라, 외부로부터 인입되는 전자계로부터 상기 액정 구동칩(22)을 보호할 수 있다. As a result, it is possible not only to protect other circuits from noise flowing out of the liquid crystal driving chip 22 but also to protect the liquid crystal driving chip 22 from an electromagnetic field drawn from the outside.

한편, 첨부된 도 3과 같이, 하부기판(160)의 접촉패드와 연결되는 있는 범프(24)와 광차단막(100)은 보호막에 의하여 절연되어 있다. Meanwhile, as shown in FIG. 3, the bump 24 and the light blocking layer 100, which are connected to the contact pads of the lower substrate 160, are insulated by the protective layer.

도면과 발명의 상세한 설명은 단지 본 발명의 예시적인 것으로서, 이는 단지 본 발명을 설명하기 위한 목적에서 사용된 것이지 의미한정이나 특허청구범위에 기재된 본 발명의 범위를 제한하기 위하여 사용된 것은 아니다. 그러므로 본 기술 분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다. 따라서, 본 발명의 진정한 기술적 보호 범위는 첨부된 특허청구범위의 기술적 사상에 의해 정해져야 할 것이다.The drawings and detailed description of the invention are merely exemplary of the invention, which are used for the purpose of illustrating the invention only and are not intended to limit the scope of the invention as defined in the claims or in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

본 발명에서는 액정표시장치용 하부기판의 일측에 실장되는 액정 구동칩의 오동작 방지를 위한 광차단막을 별도의 공정을 통하여 형성하지 않아도 되기 때문에, 공정의 간소화 및 생산성 향상의 효과를 얻을 수 있다. In the present invention, since the light blocking film for preventing the malfunction of the liquid crystal driving chip mounted on one side of the lower substrate for the liquid crystal display device does not have to be formed through a separate process, the effect of simplifying the process and improving the productivity can be obtained.

또한, 광차단막을 외부의 GND 라인과 연결되도록 함으로써, 상기 액정 구동칩에서 발생하는 노이즈를 외부로 유출되도록 하여 여타의 회로물들을 보호할 수 있고, 반대로 외부로부터 인입되는 전자계로부터 상기 액정 구동칩을 보호할 수 있는 효과도 있다. In addition, by connecting the light blocking film to an external GND line, noise generated by the liquid crystal driving chip may be leaked to the outside to protect other circuits, and conversely, the liquid crystal driving chip may be separated from an electromagnetic field introduced from the outside. There is also a protective effect.

Claims (4)

투명 기판,Transparent substrate, 상기 투명 기판 위에 형성되어 있으며 게이트 전극 및 제1 패드를 포함하는 게이트선,A gate line formed on the transparent substrate and including a gate electrode and a first pad, 상기 게이트선 위에 형성되어 있는 게이트 절연막,A gate insulating film formed on the gate line, 상기 게이트 절연막 위에 형성되어 있는 반도체,A semiconductor formed on the gate insulating film, 상기 반도체와 중첩하는 소스 전극 및 제2 패드를 포함하는 데이터선,A data line including a source electrode and a second pad overlapping the semiconductor; 상기 반도체와 중첩하며 상기 소스 전극과 마주하는 드레인 전극,A drain electrode overlapping the semiconductor and facing the source electrode, 상기 데이터선 및 드레인 전극 위에 형성되어 있는 보호막,A protective film formed on the data line and the drain electrode, 상기 보호막 위에 형성되어 있으며 상기 드레인 전극과 제1 접촉 구멍을 통해서 연결되는 화소 전극,A pixel electrode formed on the passivation layer and connected to the drain electrode through a first contact hole; 상기 보호막 위에 형성되어 있으며 상기 제1 패드 및 제2 패드와 각각 제2 및 제3 접촉 구멍을 통해서 연결되어 있는 제1 및 제2 접촉 보조 부재,First and second contact auxiliary members formed on the passivation layer and connected to the first pad and the second pad through second and third contact holes, respectively; 상기 제1 또는 제2 접촉 보조 부재와 연결되어 있는 액정 구동칩, 그리고A liquid crystal driving chip connected to the first or second contact auxiliary member, and 상기 게이트선 또는 데이터선 중 어느 하나의 선과 동일한 층에 동일한 물질로 형성되어 있으며 상기 액정 구동칩과 중첩하는 광차단막A light blocking film formed of the same material on the same layer as any one of the gate line and the data line and overlapping the liquid crystal driving chip. 을 포함하며,Including; 상기 광차단막은 외부의 접지 단자와 연결되는 액정 표시 장치The light blocking layer is a liquid crystal display connected to an external ground terminal 삭제delete 제1항에 있어서,The method of claim 1, 상기 액정구동칩은 범프 또는 와이어를 통하여 상기 투명 기판의 제1 또는 제2 패드와 연결되는 액정 표시 장치.The liquid crystal display chip is connected to the first or second pad of the transparent substrate through a bump or a wire. 제1 항 또는 제3 항에 있어서,The method according to claim 1 or 3, 상기 광차단막은 상기 범프 또는 와이어와 절연되어 있는 액정표시장치.And the light blocking layer is insulated from the bumps or wires.
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US9835918B2 (en) 2012-06-20 2017-12-05 Samsung Display Co., Ltd. Display panel and method of manufacturing the same
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