KR100254869B1 - A structure of ground line for lcd and method of grounding the same - Google Patents

A structure of ground line for lcd and method of grounding the same Download PDF

Info

Publication number
KR100254869B1
KR100254869B1 KR1019970035019A KR19970035019A KR100254869B1 KR 100254869 B1 KR100254869 B1 KR 100254869B1 KR 1019970035019 A KR1019970035019 A KR 1019970035019A KR 19970035019 A KR19970035019 A KR 19970035019A KR 100254869 B1 KR100254869 B1 KR 100254869B1
Authority
KR
South Korea
Prior art keywords
liquid crystal
crystal display
grounding
fpc
lines
Prior art date
Application number
KR1019970035019A
Other languages
Korean (ko)
Other versions
KR19990011781A (en
Inventor
김진규
Original Assignee
구본준
엘지.필립스 엘시디주식회사
론 위라하디락사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 구본준, 엘지.필립스 엘시디주식회사, 론 위라하디락사 filed Critical 구본준
Priority to KR1019970035019A priority Critical patent/KR100254869B1/en
Publication of KR19990011781A publication Critical patent/KR19990011781A/en
Application granted granted Critical
Publication of KR100254869B1 publication Critical patent/KR100254869B1/en

Links

Images

Classifications

    • 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
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0404—Matrix technologies
    • G09G2300/0408—Integration of the drivers onto the display substrate

Abstract

PURPOSE: A structure of grounding lines in a liquid crystal display and a method thereby are provided to remove grounding noise generated as the cross-sectional area of grounding lines is reduced and the length of grounding lines lengthens. CONSTITUTION: A liquid crystal display is composed of an FPC(Flexible Printed Circuit)(200), signal line driving IC grounding lines(211), and a grounding connection part(300). The FPC(200), the start point of grounding lines, receives various input signals and grounding voltage necessary to drive the liquid crystal display and transmits them to a lower plate(2). The input part of the FPC(200) is connected to the output part of a PCB substrate(10) so that the FPC(200) can receive various signal generated from the driving circuit of the PCB substrate(10). The output side terminals of the FPC(200) and the grounding lines(211) are connected in an one-to-one ratio. The grounding lines(211) are wired with scanning lines in parallel. One end of the grounding lines(211) is connected to the FPC(200) so as to receive grounding voltage. The other end is grounded. A top case, enclosing the liquid crystal display, is provided to shield the liquid crystal display from external noise factors. The grounding connection part(300) connects the top case and the grounding lines(211) at regular intervals.

Description

액정표시장치의 접지 배선 구조 및 방법Ground wiring structure and method of liquid crystal display

본 발명은 액정표시장치의 접지 배선 구조 및 방법을 개선하기 위한 것이다. 특히 COG(chip on glass) 방식의 액정표시장치에 있어서, 각 주사선구동IC와 신호선구동IC가 데이터를 입력받기 위한 수단인 입력배선 중, 접지 배선에 발생하는 노이즈를 방지하기 위한 접지배선 구조 및 방법을 개선하는 데에 목적이 있다.The present invention is to improve the ground wiring structure and method of the liquid crystal display device. Particularly in a COG (chip on glass) type liquid crystal display device, a ground wiring structure and method for preventing noise generated in the ground wiring among the input wirings in which each scan line driver IC and the signal line driver IC are means for receiving data. The purpose is to improve.

일반적으로 화면에 영상을 표시하기 위한 수단으로는, RGB 전자총에 의한 영상 처리를 수행하는 CRT 브라운관을 사용한다. 이 CRT 브라운관을 이용하여 화면에 영상을 표시하기 위해서는 전자총과 브라운관의 표면 사이에 충분한 거리가 확보되어야만 한다. 그러므로, CRT 브라운관을 이용하여 화면에 영상 표시 영역을 넓게 하려면 많은 점유 공간을 필요로 한다.In general, as a means for displaying an image on a screen, a CRT CRT which performs image processing by an RGB electron gun is used. In order to display an image on the screen using this CRT CRT, sufficient distance must be secured between the electron gun and the surface of the CRT. Therefore, a large occupied space is required to widen the image display area on the screen using the CRT CRT.

이러한 CRT 브라운관의 단점을 대치하기 위한 영상 표시 장치로써 가장 실용화 단계에 있는 것이 액정표시장치이다. 상기 액정표시장치는 구동IC와 패널의 연결방법에 따라 TAB(Tape Anisotropic Bonding)방식과 COG(Chip On Glass)방식으로 나뉘어진다.As an image display device for replacing the disadvantages of the CRT CRT, the liquid crystal display device is at the most practical stage. The liquid crystal display is divided into a tape anisotropic bonding (TAB) method and a chip on glass (COG) method according to a method of connecting a driving IC and a panel.

제4도에서와 같은 일반적인 COG방식의 액정표시장치는 상판(1), 하판(2), PCB기판(10), FPC(Flexible Printed Circuit)(20), 그리고 데이터 전송 케이블(12)로 구성된다. 상기 상판(1)은 도면에는 도시되지 않았지만, 한쪽 면에 편광판이 부착되어 있고, 반대 면에는 칼라 필터와 공통 전극이 형성되어 있다. 그리고, 상기 하판(2)은 상판(1)보다 넓은 면적을 가지며, 도면에는 도시되지 않았지만, 한쪽 면에는 편광판이 부착되어 있다. 그리고, 상기 하판에는 편광판이 부착되지 않은 반대 면은 상기 상판(1)의 공통 전극과 대향하도록 배치되며, 제1도에 도시한 바와 같이 주사선 구동IC(40), 주사선(33) 그리고, 주사선(33)과 서로 직교하여 형성되는 신호선(44)을 포함하여 구성된다.A general COG type liquid crystal display device as shown in FIG. 4 is composed of an upper plate 1, a lower plate 2, a PCB substrate 10, a flexible printed circuit (FPC) 20, and a data transmission cable 12. . Although the upper plate 1 is not shown in the figure, a polarizing plate is attached to one side, and a color filter and a common electrode are formed on the opposite side. The lower plate 2 has a larger area than the upper plate 1, and although not shown in the drawing, a polarizing plate is attached to one side thereof. The lower surface of the lower plate, on which the polarizer is not attached, is disposed to face the common electrode of the upper plate 1, and as illustrated in FIG. 1, the scan line driver IC 40, the scan line 33, and the scan line ( 33) and a signal line 44 formed orthogonal to each other.

상기 신호선구동IC(40)는 PCB기판(10)의 구동회로로부터 생성된 R·G·B(Red·Green·Blue)신호와 SSC(Shift Start Clock) 신호, LP(Latch Pulse), 감마(Gamma) 신호, 아날로그 접지 신호, 디지털 접지 신호, 3.3V 디지털 전원, 4.2V 아날로그 전원, 공통 전압(Vcom), 축적전압(Vst) 등, 각종 입력신호를 인가받는다. 이 때, 상기 입력신호가 흐르는 신호선구동IC의 입력배선(70)은 FPC(20)에 형성되어 상기 신호선구동IC(40)의 입력부에 접속된다. 즉 상기 FPC(20)은 신호선구동입력배선을 포함하고 있다. 그 신호선구동IC(40)의 출력배선(42)은 신호선(44)의 각 라인과 일대일 접속을 이룬다.The signal line driver IC 40 includes an R, G, B (Red, Green, Blue) signal, SSC (Shift Start Clock) signal, LP (Latch Pulse), Gamma (Gamma) generated from the driving circuit of the PCB 10. ) Various input signals such as a signal, an analog ground signal, a digital ground signal, a 3.3V digital power supply, a 4.2V analog power supply, a common voltage Vcom, and a storage voltage Vst. At this time, the input wiring 70 of the signal line driver IC through which the input signal flows is formed in the FPC 20 and connected to the input part of the signal line driver IC 40. That is, the FPC 20 includes signal line drive input wiring. The output wiring 42 of the signal line driver IC 40 makes one-to-one connection with each line of the signal line 44.

상기 주사선구동IC(30)는 주사선구동입력배선(21)을 통해 FPC(20)로부터 PCB기판(10)의 구동회로의 주사입력신호를 입력받아 액정표시장치의 구동에 필요한 주사전압을 생성하여 출력단자로 출력한다. 이때, 주사선구동IC(30)의 출력단자는 주사선출력배선(32)을 통해 주사선(33)의 각 라인과 일대일 접속을 이룬다.The scan line driver IC 30 receives the scan input signal of the drive circuit of the PCB substrate 10 from the FPC 20 through the scan line drive input wiring 21 to generate and output a scan voltage for driving the liquid crystal display device. Output to the terminal. At this time, the output terminal of the scan line driver IC 30 makes one-to-one connection with each line of the scan line 33 through the scan line output wiring 32.

상기 데이터전송케이블(12)은 상기 PCB기판의 구동회로에서 생성된 신호를 상기 FPC(20)의 신호선구동입력배선에 인가하기 위해 PCB기판에 FPC를 연결하도록 설치된다. 즉, 상기 PCB기판의 구동회로에서 생성된 신호는 데이터전송케이블을 거쳐 FPC의 신호선구동입력배선으로 인가된다.The data transmission cable 12 is installed to connect the FPC to the PCB substrate in order to apply the signal generated in the driving circuit of the PCB substrate to the signal line drive input wiring of the FPC 20. That is, the signal generated by the driving circuit of the PCB is applied to the signal line driving input wiring of the FPC via the data transmission cable.

그러나, 제1도에 나타낸 액정표시장치는 FPC(20)의 단가가 비싸므로, 제조원가가 높다. 그래서, 상기 FPC의 사용량을 줄이기 위하여 제2도에 도시한 바와 같이 신호선구동IC(40)와 주사선구동IC(30)의 입력배선이 하판에 직접 형성된 구조를 가진 액정표시장치도 개발되었다. 즉, 제2도에 도시된 종래의 액정표시장치는 PCB 기판(10), 전송선이 형성된 FPC(20), 상판(1), 그리고 하판(2)으로 구성된다. 상기 하판은 하판에 직접 실장된 주사선구동IC의 입력배선(71), 하판에 직접 실장된 신호선구동IC의 입력배선(70)의 주사선구동IC(30), 신호선구동IC(40), 주사선(33), 그리고 신호선(44)으로 구성된다.However, the liquid crystal display device shown in FIG. 1 has a high manufacturing cost because the unit price of the FPC 20 is high. Therefore, in order to reduce the amount of use of the FPC, a liquid crystal display device having a structure in which input wirings of the signal line driver IC 40 and the scan line driver IC 30 are directly formed on the lower plate is also developed, as shown in FIG. That is, the conventional liquid crystal display shown in FIG. 2 includes a PCB substrate 10, an FPC 20 having a transmission line, an upper plate 1, and a lower plate 2. The lower plate is the input line 71 of the scan line driver IC mounted directly on the lower plate, the scan line driver IC 30, the signal line driver IC 40, and the scan line 33 of the input line 70 of the signal line driver IC mounted directly on the lower plate. ) And a signal line 44.

제2도에 나타낸 종래의 액정표시장치는 PCB기판(10)의 구동회로에서 액정표시장치의 구동에 필요한 각종 입력신호가 생성되고, 상기 입력신호는 FPC(20)의 전송선으로 입력되는 구조를 지닌다. 상기 FPC(20)의 각 전송선을 하판에 직접 실장된 주사선구동IC의 입력배선(71)과, 하판에 직접 실장된 신호선 구동IC의 입력배선(70)에 일대일 접속을 이룬다.The conventional liquid crystal display shown in FIG. 2 has a structure in which various input signals necessary for driving the liquid crystal display are generated in the driving circuit of the PCB substrate 10, and the input signals are input to the transmission line of the FPC 20. . Each transmission line of the FPC 20 makes one-to-one connection with the input wiring 71 of the scan line driver IC mounted directly on the lower plate and the input wiring 70 of the signal line driver IC mounted directly on the lower plate.

상기 입력배선(70, 71)에 인가된 각 입력신호들은 주사선 구동IC(30)와 신호선구동IC(40)의 입력으로 작용하고, 상기 구동IC(30, 40)의 출력신호는 각 주사선(33)과 신호선(44)에 인가된다. 그리고, 상기 출력신호가 인가된 상기 주자선(33)과 신호선(44)의 신호에 따라 액정표시장치가 구동된다.Each input signal applied to the input wirings 70 and 71 serves as an input of the scan line driver IC 30 and the signal line driver IC 40, and the output signals of the drive ICs 30 and 40 are each scan line 33. ) And the signal line 44. The liquid crystal display is driven according to the signals of the main line 33 and the signal line 44 to which the output signal is applied.

제2도에 도시된 종래의 액정표시장치는, FPC(20)가 적게 사용되므로, 생산단가를 절감시킬 수 있다. 그러나, 신호선 구동IC로의 입력배선은 30개 이상이므로, 하판에 많은 배선이 존재하게 된다. 따라서, 하판의 이용효율을 높이려면, 상기 배선들은 각각 그 단면적을 작게하여 형성되어야 한다. 그러므로, 접지배선의 단면적도 줄여야 한다.In the conventional liquid crystal display shown in FIG. 2, since the FPC 20 is used less, the production cost can be reduced. However, since there are 30 or more input wirings to the signal line driver IC, there are many wirings on the lower plate. Therefore, in order to increase the utilization efficiency of the lower plate, each of the wirings should be formed with a small cross-sectional area. Therefore, the cross-sectional area of the ground wiring must also be reduced.

그런데, 상기 제2도으 액정표시장치는 접지배선의 시작점인 FPC와 접지배선의 끝점의 접지부 사이가 멀다. 이것은 외부요인으로 발생할 수 있는 잡음에 대해 영향을 받을 가능성이 매우 높아진다. 따라서, 상기 잡음으로 인한 신호의 왜곡이 발생하여 PCB기판의 구동회로에서 인가된 입력신호에 따른 구동IC의 출력이 제대로 구현되지지 않는 문제가 있다.However, the liquid crystal display of FIG. 2 is far from the FPC which is the start point of the ground line and the ground of the end point of the ground line. This is very likely to be affected by noise that may be caused by external factors. Therefore, the distortion of the signal due to the noise occurs, there is a problem that the output of the driving IC according to the input signal applied from the driving circuit of the PCB substrate is not properly implemented.

따라서, 상기 접지배선 단면적의 감소와 접지배선의 길이가 길어짐에 따라 발생하는 접지 노이즈를 제거하기 위한 액정표시장치의 접지배선 구조 및 방법이 필요한 것이다.Accordingly, there is a need for a structure and method of a ground wiring structure of a liquid crystal display device for removing ground noise caused by the reduction of the ground wiring cross-sectional area and the length of the ground wiring.

제1도는 일반적인 COG 방식 액정표시장치를 나타내는 개략도이다.1 is a schematic view showing a general COG type liquid crystal display device.

제2도는 종래의 COG 방식 액정표시장치를 나타내는 개략도이다.2 is a schematic view showing a conventional COG type liquid crystal display device.

제3도는 본 발명의 일 실시예에 따른 액정표시장치의 COG 방식을 나타내는 개략도이다.3 is a schematic diagram illustrating a COG method of a liquid crystal display according to an exemplary embodiment of the present invention.

제4도는 본 발명의 일 실시예에 따른 액정표시장치의 접지 접점 처리를 나타내는 개략도이다.4 is a schematic diagram illustrating ground contact processing of a liquid crystal display according to an exemplary embodiment of the present invention.

제5도는 본 발명의 실시예 2를 나타낸 것으로 함몰부가 형성된 탑케이스의 평면도이다.5 is a plan view of a top case in which a recess is formed, showing Embodiment 2 of the present invention.

제6도는 본 발명의 실시예 2를 나타낸 것으로 함몰부와 접지접속부가 접촉된 부분을 나타낸 단면도이다.6 is a cross-sectional view showing a second embodiment of the present invention in which the recessed portion and the ground connection portion are in contact with each other.

제7도는 본 발명의 실시예 2를 나타낸 것으로 탄력있는 지지대가 형성된 탑케이스를 나타낸 것이다.7 is a view showing the second embodiment of the present invention shows a top case in which an elastic support is formed.

제8도는 본 발명의 실시예 3을 나타낸 것으로 탄성있는 매개체로 탑케이스와 접지접속부를 연결한 것이다.8 shows the third embodiment of the present invention, in which the top case and the ground connection are connected by an elastic medium.

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

1 : 상판 2 : 하판1: top plate 2: bottom plate

10 : PCB 기판 12 : 데이터 전송 케이블(cable)10: PCB board 12: data transmission cable (cable)

20 : FPC 21 : 주사선 입력배선20: FPC 21: scan line input wiring

21′ : 신호선 입력배선 30 : 주사선 구동IC21 ': Signal line input wiring 30: Scan line driver IC

32 : 주사선 출력배선 33 : 주사선32: scanning line output wiring 33: scanning line

40 : 신호선 구동IC 42 : 신호선 출력배선40: signal line driver IC 42: signal line output wiring

44 : 신호선44: signal line

70 : 하판에 직접 실장된 신호선구동IC의 입력배선70: Input wiring of the signal line driver IC mounted directly on the bottom plate

71 : 하판에 직접 실장된 주사선구동IC의 입력배선71: Input wiring of the scanning line driver IC mounted directly on the bottom plate

100 : 탑 케이스 200 : FPC100: top case 200: FPC

211 : 구동IC의 입력배선 300 : 접지 접속부211: input wiring of the drive IC 300: ground connection

310 : 함몰부 320 : 탄력있는 지지대310: depression 320: elastic support

330 : 클립 340 : 도전성 스페이서330 clip 340 conductive spacer

본 발명에 따른 액정표시장치의 접지배선 구조는, COG 방식을 이용한 액정표시장치의 구동IC 본딩에 따라 각 주사선구동IC와 신호선구동IC가 PCB 기판으로 부터 데이터를 입력받기 위한 수단을 하판에 배치하는 전송하기 위한 전송수단과; 하판 사이드의 양축을 이루는 곳에 배선되며, 상기 전송수단으로부터 접지전압을 전송받아 신호선구동수단의 입력부로, 상기 접지전압을 인가하는 접지배선과; 액정표시장치의 외부를 싸고 외부의 잡음 요소로부터 그 액정표시장치를 차폐시키기 위한 탑 케이스; 그리고, 상기 탑 케이스에 상기 접지배선을 일정 간격으로 접속시키기 위한 접지접속부를 구비하는 것을 특징으로 하며, 그로 인해 상기 하판에 배치된 접지배선을 일정 간격으로 탑 케이스의 소정의 위치에 접속시켜, 상기 접지배선에 접지접점을 형성하는 것을 특징으로 한다.In the ground wiring structure of the liquid crystal display device according to the present invention, the scanning line driver IC and the signal line driver IC are arranged on the lower plate according to the driving IC bonding of the liquid crystal display device using the COG method. Transmission means for transmitting; A grounding wire which is wired on both sides of the lower plate side, receives a ground voltage from the transmission means, and inputs the ground voltage to an input portion of a signal line driving means; A top case surrounding the outside of the liquid crystal display and shielding the liquid crystal display from external noise elements; And a ground connection portion for connecting the ground wiring to the top case at a predetermined interval, thereby connecting the ground wiring disposed on the lower plate to a predetermined position of the top case at a predetermined interval, Forming a ground contact in the ground wiring is characterized in that.

[실시예 1]Example 1

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명하면 다음과 같다. 제3도는 본 발명의 실시예에 따른 COG방식의 액정표시장치를 나타낸 것이고, 제4도는 액정표시장치의 접지접점을 나타내는 개략도이다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 3 is a view showing a COG type liquid crystal display device according to an exemplary embodiment of the present invention, and FIG. 4 is a schematic view showing a ground contact of the liquid crystal display device.

제3도의 액정표시장치는 접지배선의 시작점인 FPC(200)와, 신호선구동IC의 접지배선(211), 및 접지접속부(300)로 구성된다. 상기 FPC(200)는 액정표시장치의 구동에 필요한 각 입력신호 및 접지전압을 PCB 기판(10)으로부터 인가받아, 하판(2)으로 전송하는 역할을 한다. 또, 상기 FPC(200) 입력부는 PCB기판(10)의 구동회로로부터 생성된 각 입력신호들을 인가받을 수 있도록 상기 PCB기판(10)의 출력부와 접속되는 구조를 가진다. 또한, 출력측 단자는 하판(2)의 입력배선(211)과 일대일 접속을 이루는 구조를 가진다.The liquid crystal display of FIG. 3 is composed of an FPC 200 which is a starting point of the ground wiring, a ground wiring 211 of the signal line driver IC, and a ground connector 300. The FPC 200 receives each input signal and ground voltage required for driving the liquid crystal display device from the PCB substrate 10 and transmits the input signals to the lower plate 2. In addition, the input portion of the FPC 200 has a structure that is connected to the output portion of the PCB substrate 10 so that each input signal generated from the driving circuit of the PCB substrate 10 can be applied. In addition, the output-side terminal has a structure which makes one-to-one connection with the input wiring 211 of the lower plate 2.

이 때, 상기 접지배선은 하판(2)의 가장자리에 주사선과 평행하도록 배선되며, 상기 접지배선의 한쪽 단은 FPC(200)에 연결되어 접지전압을 인가받고, 반대쪽단을 접지된다. 상기 접지되는 부분은 하판일 때도 있지만, 기타 다른 부분에 접지될 수도 있다. 그리고, 상기 접지배선은 인출선을 통해 신호선 구동IC(40)의 입력부에 접속된다.At this time, the ground line is wired parallel to the scan line at the edge of the lower plate 2, one end of the ground line is connected to the FPC 200 is applied a ground voltage, the other end is grounded. The grounded portion may be the bottom plate, but may be grounded to other portions. The ground line is connected to the input of the signal line driver IC 40 through the lead line.

상기 탑 케이스(100)는 액정표시장치의 외부를 싸고 외부의 잡음 요소로부터 그 액정표시장치를 차폐시키기 위한 것으로써, 금속 재질로 액정표시장치의 외부를 이룬다.The top case 100 surrounds the outside of the liquid crystal display and shields the liquid crystal display from external noise elements, and forms the outside of the liquid crystal display with a metal material.

상기 접지접속부(300)는 탑 케이스(100)와 구동IC의 입력배선(211)의 접지 배선과 일정 간격으로 접속시키기 위한 것으로써, 소정의 면적과 소정의 높이를 갖는다. 상기 접지접속부는 접지배선 위에 직접 형성될 수 있다. 그리고, 상기 접지접속부는 탑케이스 조립공정에서 상기 탑케이스에 접촉된다. 결국 상기 접지접속부에 연결된 접지배선과 상기 접지접속부에 접촉된 탑케이스(100)가 서로 연결된다. 이 때, 상기 접지접속부의 위치는 제3도에 나타낸 것과 같이 하판의 접지배선 중, 상기 구동IC 사이의 빈 영역 또는, 이에 대응하는 위치에 형성하는 것이 좋다. 왜냐하면, 상기 접지접속부는 면적이 넓을수록 효과가 좋은데, 하판에서 가장 접지배선에 가까우면서 충분한 면적을 확보할 수 있는 공간은 구동IC 사이의 빈 영역이기 때문이다. 일반적으로 상기 접지접속부는 땜납과 같은 금속이나, 은(Ag) 등을 사용하여 형성된다.The ground connection part 300 is for connecting the top case 100 and the ground wiring of the input wiring 211 of the driving IC at a predetermined interval, and has a predetermined area and a predetermined height. The ground connection may be directly formed on the ground wiring. The ground connection part contacts the top case in the top case assembly process. As a result, the ground wire connected to the ground connection part and the top case 100 in contact with the ground connection part are connected to each other. At this time, the position of the ground connection portion is preferably formed in the empty region between the drive IC, or a position corresponding thereto among the ground wiring of the lower plate as shown in FIG. This is because, the larger the area of the ground connection is, the better the effect is, because the space closest to the ground wiring at the bottom plate and sufficient space can be secured between the drive ICs. In general, the ground connection is formed using a metal such as solder, silver (Ag), or the like.

[실시예 2]Example 2

상기 실시예 1은 하판에 소정의 면적과 높이를 가진 접지접속부를 형성하고, 탑케이스가 상기 접지접속부에 접촉되도록 조립하는 것이다. 본 실시예 2는 상기 탑케이스와 상기 접지접속부의 접촉을 더 견고하게 될 수 있도록 상기 접지접속부에 정렬된 함몰부가 형성된 탑케이스를 이용한 것이다.In the first embodiment, a ground connection part having a predetermined area and height is formed on a lower plate, and the top case is assembled to contact the ground connection part. The second embodiment uses a top case having depressions aligned with the ground connection so that the contact between the top case and the ground connection is more firm.

제5도는 함몰부(310)가 형성된 탑케이스의 평면도이고, 제6도는 상기 함몰부(310)와 접지접속부(300)가 접촉된 부분을 나타낸 단면도이다. 상기 함몰부는 제7도에 나타낸 것과 같이 탄력있는 지지대(320)로 만들어 질 수도 있다. 그리고, 상기 함몰부는 탑케이스와 액정패널을 결합하는 공정전에 만들어지는 것이 좋으나, 때로는 탑케이스와 액정패널을 결합한 후에 만들어질 수도 있다.FIG. 5 is a plan view of the top case in which the recess 310 is formed, and FIG. 6 is a cross-sectional view illustrating a portion where the recess 310 and the ground connection part 300 are in contact with each other. The depression may be made of an elastic support 320 as shown in FIG. In addition, the depression may be made before the process of combining the top case and the liquid crystal panel, but may sometimes be made after combining the top case and the liquid crystal panel.

[실시예 3]Example 3

본 실시예 3은 상기 실시예 1과 실시예 2에 나타낸 것처럼 탑케이스와 접지접속부를 직접 접촉시키는 것이 아니라, 탄성있는 클립(clip) 또는, 스페이서(spacer)과 같은 매개체를 사용하여 접촉시킨 것이다. 제8도에 나타낸 것처럼 상기 접지접속부(300) 위치 클립(330) 또는 스페이서(340)와 같은 매개체를 위치시키고, 탑케이스와 액정패널을 결합하면, 상기 탑케이스와 접지접속부가 매개체를 통해 접촉된다.In the third embodiment, as shown in the first and second embodiments, the top case and the ground connection are not directly in contact with each other, but are contacted by using a medium such as an elastic clip or a spacer. As shown in FIG. 8, when a medium such as the ground connection part 300, the position clip 330 or the spacer 340 is positioned, and the top case and the liquid crystal panel are combined, the top case and the ground connection part are contacted through the medium. .

이상에서 설명한 본 발명의 실시예에 따른 액정표시장치의 접지배선 구조 및 방법에 의하면, 종래에 비해 접지전압이 안정화된다. 종래에는 접지배선의 접지 부분이 접지배선의 끝단에만 위치했었다. 그래서, 주변의 입력배선과 외부의 요인에 의해 발생하는 노이즈로 인해 접지전압이 불안정했다.According to the structure and method of the ground wiring of the liquid crystal display according to the exemplary embodiment of the present invention described above, the ground voltage is stabilized as compared with the related art. In the related art, the ground portion of the ground wiring was only located at the end of the ground wiring. Therefore, ground voltage was unstable due to noise generated by surrounding input wiring and external factors.

본 발명은 소정의 단면적을 가진 접지접속부가 일정한 간격으로 접지배선에 형성되고, 상기 접지접속부가 탑 케이스(100)에 연결된 구조를 가진다. 따라서, 상기 접지접속부에 의해 외부요인으로 인한 노이즈로부터 접지전압이 보호된다. 특히, 상기 접지접속부는 접지배선을 형성하는 공정에서 동시에 형성될 수 있으므로, 액정패널을 제조하는 데 있어서, 추가되는 공정이 없다.The present invention has a structure in which a ground connection part having a predetermined cross-sectional area is formed in the ground wiring at regular intervals, and the ground connection part is connected to the top case 100. Thus, the ground connection is protected from noise due to external factors by the ground connection. In particular, since the ground connection part may be simultaneously formed in the process of forming the ground wiring, there is no additional process in manufacturing the liquid crystal panel.

따라서, 본 발명은 인접한 입력배선과 외부에서 발생하는 잡음을 효과적으로 제거하여, PCB기판(10)의 구동회로에서 출력된 신호에 따른 구동IC의 출력이 제대로 구현되는 효과가 있다.Accordingly, the present invention effectively removes the noise generated from the adjacent input wiring and the outside, and the output of the driving IC according to the signal output from the driving circuit of the PCB substrate 10 is properly implemented.

Claims (8)

복수개의 주사선과 상기 주사선과 교차하는 복수개의 신호선과, 상기 신호선에 신호를 인가하는 구동회로와, 상기 구동회로에 접지전압을 인가하는 접지배선이 형성된 기판과; 상기 기판의 주변부를 감싸는 금속으로 된 케이스를 포함하고; 상기 접지배선과 상기 케이스를 전기적으로 접속시키는 접속수단을 포함하는 것을 특징으로 하는 액정표시장치.A substrate having a plurality of scan lines and a plurality of signal lines crossing the scan lines, a driving circuit for applying a signal to the signal lines, and a ground wiring for applying a ground voltage to the driving circuit; A metal case surrounding the periphery of said substrate; And connecting means for electrically connecting the ground wiring and the case. 제1항에 있어서, 상기 접속수단은 땜납인 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to claim 1, wherein the connection means is solder. 제1항에 있어서, 상기 접속수단은 은(Ag)인 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to claim 1, wherein the connection means is silver (Ag). 제1항에 있어서, 구동회로는 복수개의 IC이고, 상기 접속수단은 상기 IC 사이에 형성된 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to claim 1, wherein the driving circuit is a plurality of ICs, and the connection means is formed between the ICs. 제1항에 있어서, 상기 접속수단은 상기 케이스가 함몰되어 형성된 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to claim 1, wherein the connection means is formed by recessing the case. 제1항에 있어서, 상기 접속수단은 탄성을 가진 도전성 매개체인 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to claim 1, wherein the connection means is a conductive medium having elasticity. 제1항에 있어서, 상기 접속수단은 U자형 클립인 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to claim 1, wherein the connection means is a U-shaped clip. 제1항에 있어서, 상기 접속수단은 도전성스페이서인 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to claim 1, wherein the connection means is a conductive spacer.
KR1019970035019A 1997-07-25 1997-07-25 A structure of ground line for lcd and method of grounding the same KR100254869B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019970035019A KR100254869B1 (en) 1997-07-25 1997-07-25 A structure of ground line for lcd and method of grounding the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970035019A KR100254869B1 (en) 1997-07-25 1997-07-25 A structure of ground line for lcd and method of grounding the same

Publications (2)

Publication Number Publication Date
KR19990011781A KR19990011781A (en) 1999-02-18
KR100254869B1 true KR100254869B1 (en) 2000-05-01

Family

ID=19515647

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970035019A KR100254869B1 (en) 1997-07-25 1997-07-25 A structure of ground line for lcd and method of grounding the same

Country Status (1)

Country Link
KR (1) KR100254869B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100634829B1 (en) * 1999-11-05 2006-10-17 엘지.필립스 엘시디 주식회사 Method of Fabricating Liquid Crystal Display Device
KR100909056B1 (en) * 2003-01-27 2009-07-23 엘지디스플레이 주식회사 Line on glass type liquid crystal display
KR100970266B1 (en) * 2003-09-18 2010-07-16 삼성전자주식회사 Display apparatus
KR101129432B1 (en) * 2005-05-26 2012-03-26 삼성전자주식회사 Liquid crystal display
KR102223125B1 (en) * 2014-03-27 2021-03-05 삼성디스플레이 주식회사 Data driver and display apparatus having the same
KR102367137B1 (en) * 2014-03-27 2022-02-25 삼성디스플레이 주식회사 Data driver and display apparatus having the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0961789A (en) * 1995-08-28 1997-03-07 Sony Corp Liquid crystal display device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0961789A (en) * 1995-08-28 1997-03-07 Sony Corp Liquid crystal display device

Also Published As

Publication number Publication date
KR19990011781A (en) 1999-02-18

Similar Documents

Publication Publication Date Title
US6853430B2 (en) Display element driving apparatus and display using the same
US5565885A (en) Liquid crystal display panel and liquid crystal display device
EP0617311B1 (en) Liquid crystal display
JPS62280889A (en) Planar type display unit
US5193022A (en) Plane-type display apparatus
KR100254869B1 (en) A structure of ground line for lcd and method of grounding the same
KR100392603B1 (en) Driver Intergrated Circuit unit for Liquid Crystal Display Device
KR20030029731A (en) Liquid crystal display
KR100294823B1 (en) Line structure of bottom glass substrate of liquid crystal display device
CN114815359A (en) Display panel and display device
KR100194690B1 (en) Liquid crystal display module
JPH1165472A (en) Flat display device
KR100238006B1 (en) Lcd device
KR100254872B1 (en) A structure of data input line and data drive ic liquid crystal display
KR101021747B1 (en) Liquid crystal display
KR100243812B1 (en) Fpc structure of liquid crystal display device
KR100825311B1 (en) Thin film transistor liquid crystal display module structure
KR100573783B1 (en) A Back Light Unit for a Liquid Crystal Display and the lamp connection method
KR100592222B1 (en) Liquid crystal display device
KR100644849B1 (en) Liquid crystal display device
KR20050019994A (en) Tcp structure of liquid crystal display
JP4252478B2 (en) Display device
KR19990009399A (en) COG type liquid crystal panel and semiconductor IC with bump wiring
KR20050009365A (en) Liquid crystal display device module
KR200160829Y1 (en) Module structure of liquid crystal display device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
N231 Notification of change of applicant
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20061229

Year of fee payment: 8

LAPS Lapse due to unpaid annual fee