KR19980082889A - LCD Display - Google Patents
LCD Display Download PDFInfo
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- KR19980082889A KR19980082889A KR1019970017991A KR19970017991A KR19980082889A KR 19980082889 A KR19980082889 A KR 19980082889A KR 1019970017991 A KR1019970017991 A KR 1019970017991A KR 19970017991 A KR19970017991 A KR 19970017991A KR 19980082889 A KR19980082889 A KR 19980082889A
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- pad
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- line driver
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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
- G02F1/13452—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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13458—Terminal pads
-
- 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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
- G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
본 발명은 COG(Chip On Glass) 방식의 액정표시장치에 관한 것이다. COG방식은 액정표시장치의 주사선구동IC와 신호선구동IC를 하판에 직접 실장시키는 기술이다. 일반적으로 상기 신호선구동IC의 입력배선부는 상기 주사선구동IC의 입력배선부보다 배선수가 많고 복잡하여 하판에 직접 형성되지 못한다. 상기 입력배선부는 디지탈신호를 인가받는 디지탈입력배선부와 아날로그 신호를 인가받는 아날로그입력배선부가 있다.The present invention relates to a liquid crystal display device of a chip on glass (COG) method. The COG method is a technology that directly mounts the scan line driver IC and the signal line driver IC of a liquid crystal display device on a lower plate. In general, the input wiring portion of the signal line driver IC is more complicated than the input wiring portion of the scan line driver IC and is not directly formed on the lower plate. The input wiring unit includes a digital input wiring unit receiving a digital signal and an analog input wiring unit receiving an analog signal.
일반적으로 COG 방식의 액정표시장치는 신호선구동IC의 입력배선부가 FPC에 형성되어 있다. 그리고, 상기 FPC가 액정표시장치의 하판에 접착된다. 그런데, 상기 FPC는 가격이 높아 FPC의 폭이 넓으면, 액정표시장치의 단가가 높아지는 문제가 있다.In general, in the COG type liquid crystal display, the input wiring portion of the signal line driver IC is formed in the FPC. The FPC is bonded to the lower plate of the liquid crystal display device. However, when the FPC is high in price and wide in FPC, the cost of the liquid crystal display increases.
본 발명은 상기 입력배선 중에 디지틀 신호를 인가받는 디지탈입력배선은 액정표시장치의 하판에 직접 형성시키고, 아날로그 신호를 인가받는 아날로그입력배선은 FPC에 형성시킴으로써 상기 FPC의 폭을 종래보다 좁힐 수 있다. 그래서, 상기 FPC의 가격을 절감하여 액정표시장치의 단가를 낮출 수 있다.According to the present invention, the width of the FPC can be narrowed by forming the digital input wiring to which the digital signal is applied in the input wiring directly on the lower plate of the liquid crystal display and the analog input wiring to which the analog signal is applied to the FPC. Therefore, the cost of the FPC can be reduced to lower the unit cost of the liquid crystal display.
Description
본 발명은 COG방식의 액정표시장치에 있어서, 신호선구동IC의 입력단자에 연결되는 입력배선의 일부를 하판에 생성시킴으로써 FPC의 폭을 줄이고, PCB기판을 접착시키는 FPC의 사용량을 줄여 액정표시장치의 제작단가를 낮추는 데에 그 목적이 있다.According to the present invention, in the COG type liquid crystal display device, a portion of the input wiring connected to the input terminal of the signal line driver IC is formed on the lower plate to reduce the width of the FPC and to reduce the amount of FPC used to bond the PCB substrate. The purpose is to lower the production cost.
일반적인 표시장치로서 사용되는 CRT브라운관은 RGB 전자총에 의해 영상을 표시하는 방법을 사용한다. 그러나, CRT브라운관은 표시영역을 크게하려면 필연적으로 두께를 증가시켜야 한다는 단점이 있다. 그 이유는 전자총과 브라운관의 표면 사이의 거리가 충분히 확보되어야만 화면에 영상을 표시할 수 있기 때문이다.The CRT CRT used as a general display device uses a method of displaying an image by an RGB electron gun. However, the CRT CRT has a disadvantage in that it is necessary to increase the thickness in order to enlarge the display area. The reason is that an image can be displayed on the screen only when the distance between the electron gun and the surface of the CRT is sufficiently secured.
그래서, 이러한 CRT브라운관을 대체하는 표시장치들이 개발 중에 있는데, 그 중 액정표시장치는 CRT브라운관을 대체하는 표시장치로서 가장 가까이 실용화단계에 접근해 있다.Thus, display devices are being developed to replace the CRT CRTs. Among them, the liquid crystal display is approaching the practical use stage as a display device to replace the CRT CRTs.
액정표시장치는 액정패널과 구동IC의 접착방법에 따라 TAB방식의 액정표시장치와 COG방식의 액정표시장치로 구분지을 수 있다. 종래에는 TAB방식의 액정표시장치가 주류를 이루었으나, 제작기술의 발달에 따라 COG방식의 액정표시장치도 많이 개발되고 있다.The liquid crystal display device may be classified into a TAB type liquid crystal display device and a COG type liquid crystal display device according to a method of bonding the liquid crystal panel and the driving IC. Conventionally, TAB type liquid crystal display devices have become mainstream, but COG type liquid crystal display devices have been developed with the development of manufacturing technology.
일반적인 COG방식의 액정표시장치는 도1에 나타낸 것과 같이 투명기판으로 형성된 상판(10)과 하판(11)으로 구성되어 있다. 도면에는 도시되지 않았지만, 상기 상판은 한쪽면에 편광판이 부착되어 있고, 반대면에는 칼라필터와 공통전극이 형성되어 있다. 그리고, 상기 하판은 도면에는 도시되지 않았지만, 한쪽면에 편광판이 부착되어 있고, 상기 상판보다 조금 더 넓다. 상기 하판은 편광판이 부착되지 않은 면이 상기 상판의 공통전극과 대향하도록 맞붙어 있다.A general COG type liquid crystal display device is composed of an upper plate 10 and a lower plate 11 formed of a transparent substrate as shown in FIG. Although not shown in the drawing, the upper plate has a polarizing plate attached to one side thereof, and a color filter and a common electrode formed on the opposite side thereof. Although the lower plate is not shown in the figure, a polarizing plate is attached to one side thereof, and is slightly wider than the upper plate. The lower plate is joined so that the surface on which the polarizer is not attached is opposite to the common electrode of the upper plate.
상기 하판은 상기 상판에 대응하는 제1영역(12)과 상판에 대응하지 않는 제2영역(13)으로 구분지을 수 있다. 상기 제1영역에는 주사선(22)과 신호선(23)이 서로 직교하며 형성되어 있다. 그리고, 상기 제2영역(13)에는 상기 주사선(22)에 연결된 주사선구동IC(14)와 상기 신호선(23)에 연결된 신호선구동IC(15)가 부착되어 있다.The lower plate may be divided into a first region 12 corresponding to the upper plate and a second region 13 not corresponding to the upper plate. In the first region, the scan line 22 and the signal line 23 are perpendicular to each other. In addition, a scan line driver IC 14 connected to the scan line 22 and a signal line driver IC 15 connected to the signal line 23 are attached to the second region 13.
상기 신호선구동IC(15)는 입력단자(17)와 출력단자(18)로 구성되어 있다. 상기 입력단자는 R(Red)단자 6개와 G(Green)단자 6개 및 B(Blue)단자 6개와 SSC(Shift Start Clock)단자와 SSP(Shift Start Pulse)단자와 LP(Latch Pulse)단자와 감마(Gamma)입력선 9개와 아날로그 접지단자와 디지탈 접지단자와 디지탈 전압의 3.3V 전원단자와 아날로그 전압의 4.2V 전원단자와 공통전압단자(Vcom)와 축적전압단자(Vst)와 데이터입력단자(Din)단자 등으로 구성되어 있다. 그리고, 상기 출력단자(18)는 상기 신호선(23)에 하나씩 연결되어 있다. 일반적으로 하나의 신호선구동IC(15)에 약 80개∼100개의 출력단자가 있다.The signal line driver IC 15 is composed of an input terminal 17 and an output terminal 18. The input terminals include 6 R (Red) terminals, 6 G (Green) terminals, 6 B (Blue) terminals, SSC (Shift Start Clock) terminals, SSP (Shift Start Pulse) terminals, LP (Latch Pulse) terminals, and gamma. (Gamma) 9 input lines, analog ground terminal, digital ground terminal, 3.3V power terminal of digital voltage, 4.2V power terminal of analog voltage, common voltage terminal (Vcom), accumulated voltage terminal (Vst) and data input terminal (Din Terminal). The output terminal 18 is connected to the signal line 23 one by one. Generally, there are about 80 to 100 output terminals in one signal line driver IC 15.
그리고, 상기 액정표시장치는 하판의 외부에 따로 설치된 PCB 회로기판(19)과 상기 입력단자를 연결하기 위하여 데이터전송선(connection cable)(20)과 FPC(21)를 이용하였다. 상기 FPC(21)에는 신호선구동IC와 주사선구동IC의 입력단자에 연결되는 입력배선(16)이 형성되어 있다. 도1은 PCB기판(19)과 FPC(21)가 데이터전송선(20)으로 연결되어 있고, 상기 FPC(21)와 신호선구동IC의 입력단자(17)가 연결된 액정표시장치를 나타낸 것이다.In addition, the liquid crystal display uses a data connection line 20 and an FPC 21 to connect the PCB 19 and the input terminal separately installed on the outside of the lower plate. The FPC 21 has an input wiring 16 connected to the input terminals of the signal line driver IC and the scan line driver IC. FIG. 1 shows a liquid crystal display device in which a PCB 19 and an FPC 21 are connected by a data transmission line 20 and the FPC 21 and an input terminal 17 of a signal line driver IC are connected.
그런데, 도1에 나타낸 액정표시장치는 제작시 광폭(wide) 혹은, 다층(multi-layer)의 FPC가 필요하다. 왜냐하면, 도2에 나타낸 것과 같이 상기 신호선구동IC의 입력단자에 각각 연결되는 입력배선(16)이 서로 단락되지 않으려면, 상기 FPC(21)의 폭이 넓거나 다층이어야 하기 때문이다.However, the liquid crystal display shown in Fig. 1 requires a wide or multi-layer FPC in manufacturing. This is because, as shown in FIG. 2, the widths of the FPCs 21 should be wide or multilayered so that the input wires 16 respectively connected to the input terminals of the signal line driver IC do not short each other.
그러나, 상기 FPC의 폭이 넓거나 다층인 경우, 액정표시장치의 단가가 높아지는 문제점이 있다. 상기 FPC의 면적을 줄이려고, 도3에 나타낸 것과 같이 L자 모양의 FPC(30)를 액정표시장치에 사용하더라도 FPC의 단가는 줄어들지 않는다. 그 이유는 도4에 나타낸 것과 같이 상기 FPC의 단가가 직사각형(31) 단위로 결정되며 다층이기 때문이다.However, when the width of the FPC is wide or multi-layer, there is a problem in that the cost of the liquid crystal display increases. In order to reduce the area of the FPC, even if the L-shaped FPC 30 is used in the liquid crystal display as shown in Fig. 3, the unit cost of the FPC does not decrease. This is because, as shown in Fig. 4, the unit cost of the FPC is determined in the unit of a rectangle 31 and is a multilayer.
이러한 문제를 해결하기 위하여 도5에 나타낸 것과 같은 액정표시장치도 제안되었다. 상기 도5의 액정표시장치는 주사선구동IC(14)의 입력배선(50)을 Al(알루미늄)과 같은 금속으로 상기 하판(11)에 형성시키고, 신호선구동IC의 입력배선(16)을 FPC(21)로 형성시킴으로써 FPC의 양을 줄인 것이다. 그러나, 이 방법에서도 광폭의 FPC를 사용하기 때문에 단가절감의 효과는 매우 미미하다. 사실, 액정표시장치에서 FPC가 많이 사용되는 부분은 신호선구동IC의 입력단자(17)에 연결되는 부분이다. 왜냐하면, 주사선구동IC에 비해 신호선구동IC의 입력단자가 훨씬 많기 때문이다.In order to solve this problem, a liquid crystal display as shown in FIG. 5 has also been proposed. In the liquid crystal display of FIG. 5, the input line 50 of the scan line driver IC 14 is formed on the lower plate 11 with a metal such as Al (aluminum), and the input line 16 of the signal line driver IC is formed by FPC (FIG. 21) to reduce the amount of FPC. However, since this method also uses a wide FPC, the effect of unit cost reduction is very small. In fact, the part where FPC is frequently used in the liquid crystal display device is a part connected to the input terminal 17 of the signal line driver IC. This is because the signal line driver IC has more input terminals than the scan line driver IC.
도6은 신호선구동IC의 입력배선(60)과 주사선구동IC의 입력배선(50)이 하판에 직접 형성된 액정표시장치이다. 원래 신호선구동IC의 배선의 수는 약 30개 이상이나, 본 도면에서는 생략하였다. 상기 도6와 같은 액정표시장치는 협폭의 소면적의 FPC(21)만 사용해도 되므로, 제작시 필요한 FPC의 단가를 줄일 수 있다. 그러나, 상기 입력배선에 인가되는 신호의 왜곡을 방지하기 위해서는 상기 하판에 형성된 입력배선의 폭이 넓어야 하므로, 상기 하판의 크기가 증대되는 문제점이 있다. 또, 하판에서 일어나는 배선의 수많은 교차부(70)의 기생용량에 의해 성능이 저하된다.6 is a liquid crystal display in which the input wiring 60 of the signal line driver IC and the input wiring 50 of the scan line driver IC are directly formed on the lower plate. Originally, the number of wirings of the signal line driver IC was about 30 or more, but the drawings were omitted. In the liquid crystal display as shown in FIG. 6, only a narrow FPC 21 may be used, thereby reducing the unit cost of the FPC required for manufacturing. However, in order to prevent distortion of the signal applied to the input wiring, the width of the input wiring formed on the lower board should be wide, which causes a problem that the size of the lower board is increased. In addition, the performance is degraded by the parasitic capacitance of the many crossing portions 70 of the wiring occurring in the lower plate.
도1은 COG(Chip On Glass) 방식의 액정표시장치의 구조를 나타낸 것이다.1 illustrates a structure of a liquid crystal display device of a chip on glass (COG) method.
도2은 FPC의 개략적인 구조를 나타낸 것이다.2 shows a schematic structure of an FPC.
도3는 L자 형태의 FPC를 나타낸 것이다.Figure 3 shows the L-shaped FPC.
도4는 주사선구동IC의 모든 입력배선부는 하판에 직접 형성되고, 신호선구동IC의 입력배선부는 FPC에 형성된 액정표시장치를 나타낸 것이다.4 shows a liquid crystal display device in which all input wiring portions of the scan line driver IC are directly formed on the lower plate, and the input wiring portions of the signal line driver IC are formed on the FPC.
도5는 신호선구동IC의 모든 입력배선부가 하판에 직접 형성된 액정표시장치를 나타낸 것이다.5 shows a liquid crystal display in which all input wiring portions of the signal line driver IC are directly formed on the lower plate.
도6은 본 발명의 실시예1을 나타낸 것이다.6 shows Embodiment 1 of the present invention.
도7은 본 발명의 실시예2를 나타낸 것이다.7 shows a second embodiment of the present invention.
*도면의 주요부분에 대한 부호의 설명** Explanation of symbols for main parts of drawings *
10 : 상판11 : 하판12 : 제1영역10 top plate 11 bottom plate 12 first area
13 : 제2영역14 : 주사선구동IC15 : 신호선구동IC13: second region 14: scan line driver IC 15: signal line driver IC
16 : 입력배선17 : 입력단자18 : 출력단자16: input wiring 17: input terminal 18: output terminal
19 : PCB기판20 : 데이터전송선21 : FPC19: PCB substrate 20: data transmission line 21: FPC
22 : 주사선23 : 신호선30 : L자형의 FPC22 scanning line 23 signal line 30 L-shaped FPC
31 : 직사각형의 FPC50 : 하판에 직접 실장된 주사선구동IC의 입력배선31: Rectangular FPC50: Input wiring of the scanning line driver IC mounted directly on the bottom plate
60 : 하판에 직접 실장된 신호선구동IC의 입력배선70 : 교차부60: Input wiring of the signal line driver IC mounted directly on the bottom plate 70: Cross section
100 : 상판110 : 제1영역120 : 제2영역100: top plate 110: first region 120: second region
130 : 하판140 : 주사선구동IC130: lower plate 140: scanning line drive IC
150 : 하판에 직접 실장된 주사선구동IC의 입력배선160 : 출력단자150: input wiring of the scanning line driver IC mounted directly on the bottom plate 160: output terminal
170 : 신호선구동IC180 : 입력신호선190 : 제어신호선170: signal line driving IC 180: input signal line 190: control signal line
200 : FPC210 : 아날로그 신호선200: FPC210: analog signal line
본 발명은 신호선구동IC의 입력배선 중, 디지탈 파형의 신호가 인가되는 디지탈입력배선은 하판에 직접 형성되고, 아날로그 파형의 신호가 인가되는 아날로그입력배선은 FPC에 형성된 액정표시장치이다. FPC에 아날로그입력배선만을 형성시킨 이유는 아날로그 신호는 디지탈 신호에 비해 배선폭과 길이에 따른 신호왜곡이 심하기 때문이다. 아날로그 신호를 인가받는 아날로그 입력배선은 하판에 직접 형성되는 것보다 FPC에 형성되는 것이 정확한 신호전달에 도움이 된다. 본 발명에 대해서는 실시예를 통해 자세히 설명한다.According to the present invention, among the input wires of the signal line driver IC, the digital input wire to which a digital waveform signal is applied is formed directly on the bottom plate, and the analog input wire to which the analog waveform signal is applied is a liquid crystal display device formed on the FPC. The reason why only the analog input wiring is formed in the FPC is that the analog signal has more severe signal distortion depending on the wiring width and length than the digital signal. The analog input wiring that receives the analog signal is formed on the FPC rather than directly on the bottom plate, which helps in accurate signal transmission. The present invention will be described in detail through examples.
(실시예1)Example 1
본 발명의 구조는 도7에 나타낸 것과 같다. 본 발명의 액정표시장치는 상판(100)과; 상기 상판에 대향하는 제1영역(110)과 상기 제1영역을 넘어서는 제2영역(120)을 가진 하판(130)과; 상기 하판의 제2영역 일부에 일렬로 나란히 형성된 복수개의 주사선구동IC(140)와; 상기 하판의 제2영역 일부에 상기 주사선구동IC와 평행한 방향으로 형성되고, 상기 주사선구동IC에 분기하여 연결된 주사선구동배선(150)과; 상기 하판의 제2영역 일부에 일렬로 나란히 형성되고, 한쪽 단면(端面)에 인출된 신호전압출력선과 반대쪽 단면(端面)에 인출된 영상신호입력단자와 제어신호입력단자와 전원입력단자와 접지단자와 감마신호단자와 공통전압단자와 축적전압단자로 구성된 복수개의 신호선구동IC(170)와; 상기 신호선구동IC와 상기 하판의 가장자리 사이에 상기 신호선구동IC와 평행한 방향으로 형성되고, 상기 신호선구동IC의 영상신호입력단자에 분기하여 연결된 복수개의 입력신호선(180)과; 상기 신호선구동IC와 상기 하판의 가장자리 사이에 상기 신호선구동IC와 평행한 방향으로 형성되고, 상기 신호선구동IC의 제어신호입력단자에 분기하여 연결된 복수개의 제어신호선(190)과; 전원입력선 및 상기 전원입력선에 연결된 전원입력패드와 접지선 및 상기 접지선에 연결된 접지패드와 감마신호선 및 상기 감마신호선에 연결된 감마신호패드와 공통전압선 및 상기 공통전압선에 연결된 공통전압패드와 축적전압선 및 상기 축적전압선에 연결된 축적전압패드가 형성되고, 상기 전원입력패드와 상기 접지패드와 상기 감마신호패드와 상기 공통전압패드와 상기 축적전압패드가 상기 하판의 가장자리에 걸쳐지도록 상기 하판의 제2영역에 접착된 FPC(200)로 구성되어, 상기 전원입력패드에 상기 전원입력단자가 연결되고, 상기 접지패드에 상기 접지단자가 연결되고, 상기 감마신호패드에 상기 감마신호단자가 연결되고, 상기 공통전압패드와 상기 공통전압단자가 연결되고, 상기 축적전압패드에 상기 축적전압단자가 연결된 구조로 되어 있다. 전원입력선과 접지선과 감마신호선 및 공통전압선과 축적전압선은 아날로그 파형의 신호를 인가받으므로, 아날로그 신호선(210)이라 한다.The structure of the present invention is as shown in FIG. Liquid crystal display device of the present invention and the top plate (100); A lower plate 130 having a first region 110 facing the upper plate and a second region 120 beyond the first region; A plurality of scan line driver ICs 140 formed side by side in a portion of the second region of the lower plate; A scan line driver wiring 150 formed in a part of the second region of the lower plate in a direction parallel to the scan line driver IC and branched to the scan line driver IC; A video signal input terminal, a control signal input terminal, a power input terminal, and a ground terminal which are formed side by side in a part of the second region of the lower plate and are drawn on the opposite side to the signal voltage output line drawn on one end face; And a plurality of signal line driver ICs 170 including a gamma signal terminal, a common voltage terminal, and a storage voltage terminal; A plurality of input signal lines 180 formed between the signal line driver IC and the edge of the lower plate in a direction parallel to the signal line driver IC and branched to the image signal input terminal of the signal line driver IC; A plurality of control signal lines (190) formed between the signal line driver IC and the edge of the lower plate in a direction parallel to the signal line driver IC and branched to a control signal input terminal of the signal line driver IC; A power input line, a power input pad connected to the power input line, a ground line, a ground pad connected to the ground line, a gamma signal line, a gamma signal pad connected to the gamma signal line, a common voltage line, a common voltage pad connected to the common voltage line, and a storage voltage line; An accumulation voltage pad connected to the accumulation voltage line is formed, and the power supply pad, the ground pad, the gamma signal pad, the common voltage pad, and the accumulation voltage pad are formed in the second region of the lower plate so as to span the edge of the lower plate. It is composed of a bonded FPC (200), the power input terminal is connected to the power input terminal, the ground pad is connected to the ground terminal, the gamma signal pad is connected to the gamma signal terminal, the common voltage A pad and the common voltage terminal are connected, and the storage voltage terminal is connected to the storage voltage pad. There. Since the power input line, the ground line, the gamma signal line, the common voltage line, and the accumulated voltage line receive an analog waveform signal, it is called an analog signal line 210.
상기 입력신호선은 보통 R(Red) 계조입력선 6개와 G(Green) 계조입력선 6개 및 B(Blue) 계조입력선 6개, 도합 18개로 구성되어 있다. 상기 입력신호선의 개수는 액정표시장치의 컬러처리능력에 관계가 있다. 만약 R계조입력선이 8개, G계조입력선이 8개, B계조입력선이 8개로 구성되어 있다면, 액정표시장치는 트루컬러(24비트=16.7Mega)를 구현할 수 있게 된다. 그리고, 상기 제어신호선은 쉬프트클럭신호선과 쉬프트스타트신호선 및 래치신호선으로 구성되어 있다. 상기 입력신호선과 제어신호선에 인가되는 신호는 디지탈 파형을 가지고 있다. 즉, 본 발명의 액정표시장치는 디지탈 파형의 신호를 인가받는 신호선(180, 190)이 상기 하판에 형성된다.The input signal line is usually composed of six R (Red) gray input lines, six G (Green) gray input lines, six B (Blue) gray input lines, and a total of 18. The number of input signal lines is related to the color processing capability of the liquid crystal display. If there are eight R gray input lines, eight G gray input lines, and eight B gray input lines, the liquid crystal display may implement a true color (24 bits = 16.7 Mega). The control signal line is composed of a shift clock signal line, a shift start signal line, and a latch signal line. The signal applied to the input signal line and the control signal line has a digital waveform. That is, in the liquid crystal display of the present invention, signal lines 180 and 190 to which a digital waveform signal is applied are formed on the lower plate.
그리고, 상기 FPC의 전원입력패드와 상기 신호선구동IC의 전원입력단자 사이, 상기 FPC의 접지패드와 상기 신호선구동IC의 감마신호패드 사이, 상기 FPC의 공통전압패드와 상기 신호선구동IC의 공통전압단자 사이, 및 상기 축적전압패드와 상기 신호선구동IC의 축적전압단자 사이의 연결배선이 상기 하판에 형성된 입력신호선과 제어신호선에 단락(short)되지 않도록 상기 연결배선과 상기 입력신호선 사이 및 상기 연결배선과 상기 제어신호선 사이에 절연막(도면미도시)이 형성된다.And between a power input pad of the FPC and a power input terminal of the signal line driver IC, a ground pad of the FPC and a gamma signal pad of the signal line driver IC, a common voltage pad of the FPC and a common voltage terminal of the signal line driver IC. Between the connection wiring and the input signal line and between the connection wiring line and the input signal line so that the connection wiring between the storage voltage pad and the storage voltage terminal of the signal line driver IC is not shorted to the input signal line and the control signal line formed on the lower plate. An insulating film (not shown) is formed between the control signal lines.
(실시예2)Example 2
본 실시예2의 액정표시장치는 실시예1의 액정표시장치와 구성이 거의 비슷하다. 본 실시예2의 액정표시장치는 실시예1의 액정표시장치와 동일한 FPC(200)의 상기 전원입력패드와 상기 접지패드와 상기 감마신호패드와 상기 공통전압패드와 상기 축적전압패드 등 아날로그 신호선(210)이 상기 신호선구동IC에 인접되도록 하고, 상기 FPC가 상기 입력신호선(180)과 상기 제어신호선(190)에 겹쳐지도록 상기 하판(130)의 제2영역(120)에 접착된 것이다. 본 실시예2의 액정표시장치는 도8에 나타낸 것과 같다.The liquid crystal display device of this embodiment 2 is almost similar in configuration to the liquid crystal display device of the first embodiment. The liquid crystal display according to the second embodiment has an analog signal line such as the power input pad, the ground pad, the gamma signal pad, the common voltage pad, and the accumulated voltage pad of the same FPC 200 as the liquid crystal display device of the first embodiment. 210 is adjacent to the signal line driver IC, and the FPC is bonded to the second region 120 of the lower plate 130 so as to overlap the input signal line 180 and the control signal line 190. The liquid crystal display of Embodiment 2 is as shown in FIG.
상기 실시예1의 액정표시장치는 FPC와 신호선구동IC가 소정의 거리를 두고 서로 떨어져 있으나, 본 실시예2의 액정표시장치는 상기 FPC와 신호선구동IC가 인접해 구성되어 있다. 그래서, 상기 실시예1에 나타낸 것과 같이 상기 전원입력패드와 상기 신호선구동IC의 전원입력단자 사이, 상기 FPC의 접지패드와 상기 신호선구동IC의 감마신호패드 사이, 상기 FPC의 공통전압패드와 상기 신호선구동IC의 공통전압단자 사이, 및 상기 축적전압패드와 상기 신호선구동IC의 축적전압단자 사이의 연결배선과 상기 입력신호선 사이와, 상기 연결배선과 제어신호선 사이에 절연막이 형성되지 않는다.In the liquid crystal display of Example 1, the FPC and the signal line driver IC are separated from each other by a predetermined distance. In the liquid crystal display of Example 2, the FPC and the signal line driver IC are adjacent to each other. Thus, as shown in Embodiment 1, between the power input pad and the power input terminal of the signal line driver IC, between the ground pad of the FPC and the gamma signal pad of the signal line driver IC, the common voltage pad of the FPC and the signal. No insulating film is formed between the common voltage terminal of the line driver IC, between the accumulated voltage pad and the accumulated voltage terminal of the signal line driver IC, between the input signal line, and between the connection line and the control signal line.
종래의 COG방식의 액정표시장치는 FPC에 신호선구동IC의 모든 입력배선부가 형성되므로, FPC의 폭이 넓었다. 그래서, FPC의 가격으로 인해 액정표시장치의 단가가 높아지는 단점이 있었다. 그리고, 하판에 상기 입력배선부가 모두 형성된 액정표시장치는 상판에 비해 하판이 지나치게 크므로, 액정표시장치의 표시영역의 비율이 낮아지는 단점이 있다.In the conventional COG type liquid crystal display device, since all input wiring portions of the signal line driver IC are formed in the FPC, the width of the FPC is wide. Therefore, there is a disadvantage in that the unit price of the liquid crystal display increases due to the price of the FPC. In addition, the liquid crystal display device having all of the input wiring portions formed on the lower plate has a disadvantage that the ratio of the display area of the liquid crystal display device is lower because the lower plate is too large.
그러나, 본 발명의 액정표시장치는 상기 신호선구동IC의 입력배선부 중에 디지탈 파형의 신호가 인가되는 배선은 하판에 형성되고, 아날로그 파형의 신호가 인가되는 배선은 FPC에 형성된 것이다. 그래서, 종래의 COG방식의 액정표시장치 중, FPC만으로 신호선구동IC의 입력배선이 형성된 것에 비해 FPC의 폭이 좁아 단가가 낮고, 하판에 신호선구동IC의 입력배선이 형성된 것에 비해 표시영역의 비율이 높아진다.However, in the liquid crystal display device of the present invention, a wiring to which a digital waveform signal is applied to the input wiring portion of the signal line driver IC is formed on the lower plate, and a wiring to which an analog waveform signal is applied is formed to the FPC. Therefore, in the conventional COG type liquid crystal display device, the FPC width is narrower than the input wiring of the signal line driver IC using only the FPC, and thus the unit cost is low, and the ratio of the display area is lower than that of the input wiring of the signal line driver IC in the lower plate. Increases.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019970017991A KR100238006B1 (en) | 1997-05-09 | 1997-05-09 | Lcd device |
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| KR100238006B1 KR100238006B1 (en) | 2000-01-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990047258A (en) * | 1997-12-03 | 1999-07-05 | 김영환 | Liquid crystal display module |
| KR100476526B1 (en) * | 1997-06-11 | 2005-08-10 | 삼성전자주식회사 | LCD Module Structure |
| KR100699823B1 (en) * | 2003-08-05 | 2007-03-27 | 삼성전자주식회사 | Low cost type flexible film package module and method for fabricating thereof |
| KR100909420B1 (en) * | 2002-12-28 | 2009-07-24 | 엘지디스플레이 주식회사 | Line-on-glass type liquid crystal display panel |
-
1997
- 1997-05-09 KR KR1019970017991A patent/KR100238006B1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100476526B1 (en) * | 1997-06-11 | 2005-08-10 | 삼성전자주식회사 | LCD Module Structure |
| KR19990047258A (en) * | 1997-12-03 | 1999-07-05 | 김영환 | Liquid crystal display module |
| KR100909420B1 (en) * | 2002-12-28 | 2009-07-24 | 엘지디스플레이 주식회사 | Line-on-glass type liquid crystal display panel |
| KR100699823B1 (en) * | 2003-08-05 | 2007-03-27 | 삼성전자주식회사 | Low cost type flexible film package module and method for fabricating thereof |
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| KR100238006B1 (en) | 2000-01-15 |
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