KR20040009858A - Liquid crystal display - Google Patents
Liquid crystal display Download PDFInfo
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- KR20040009858A KR20040009858A KR1020020044217A KR20020044217A KR20040009858A KR 20040009858 A KR20040009858 A KR 20040009858A KR 1020020044217 A KR1020020044217 A KR 1020020044217A KR 20020044217 A KR20020044217 A KR 20020044217A KR 20040009858 A KR20040009858 A KR 20040009858A
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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
- G02F1/1343—Electrodes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
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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
- G02F2202/00—Materials and properties
- G02F2202/22—Antistatic materials or arrangements
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Abstract
Description
본 발명은 액정표시장치에 관한 것으로, 특히 정전기 및 잔류 DC에 의한 스트레스를 방지하여 고화질의 디스플레이를 제공할 수 있는 액정표시장치에 관한 것이다.The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of providing a high-quality display by preventing the stress caused by static electricity and residual DC.
도 1은 종래의 액정표시장치의 단면을 나타낸 것으로, FFS 모드의 LCD를 나타낸 단면도이다.1 is a cross-sectional view of a conventional liquid crystal display device, and is a cross-sectional view showing the LCD of the FFS mode.
도시된 바와 같이, 하부기판(10)과 상부기판(20)이 소정거리 즉, 셀갭을 두고 대향, 배치되고, 상기 하부기판(10)과 상부기판(20) 사이에 수 개의 액정분자들(30a)을 포함한 액정층(30)이 개재되어 있다.As shown, the lower substrate 10 and the upper substrate 20 are disposed to face each other with a predetermined distance, that is, a cell gap, and several liquid crystal molecules 30a between the lower substrate 10 and the upper substrate 20. ) Is interposed a liquid crystal layer (30).
상기 하부기판(10)의 내측면상에는 액정분자들(30a)을 구동시키기 위한 카운터 전극(11) 및 화소전극(12)이 게이트 절연막(13) 사이에 형성된다. 이때, 상기 카운터 전극(11)과 화소전극(12)은 투명 전도체로 형성되며, 그들간의 간격이 셀갭보다 좁게 되도록 형성된다. 또한, 상기 카운터 전극(11)은 박스(box)형상 또는 빗살형상으로 형성되며, 상기 화소전극(12)은 빗살형상으로 형성된다.The counter electrode 11 and the pixel electrode 12 for driving the liquid crystal molecules 30a are formed between the gate insulating layer 13 on the inner side surface of the lower substrate 10. In this case, the counter electrode 11 and the pixel electrode 12 are formed of a transparent conductor, the gap between them is formed to be narrower than the cell gap. In addition, the counter electrode 11 is formed in a box shape or a comb shape, and the pixel electrode 12 is formed in a comb shape.
한편, 도면에는 도시하지 않았지만 상기 하부기판(10)의 내측면상에는 단위 화소가 한정되도록 게이트 라인 및 데이터 라인이 교차 배열되어 있고, 상기 게이트 라인과 데이터 라인 교차부에 스위칭 소자로서 박막 트랜지스터가 형성되어 있다.Although not shown in the drawing, gate lines and data lines are alternately arranged on the inner surface of the lower substrate 10 so that unit pixels are limited, and thin film transistors are formed as switching elements at the intersections of the gate lines and the data lines. have.
그리고 상기 상부기판(20)의 내측면상에는 블랙매트릭스(21)가 형성되어 있고, 상기 블랙매트릭스(21) 사이 영역에는 R, G, B의 컬러필터(22)가 형성된다.The black matrix 21 is formed on the inner surface of the upper substrate 20, and the color filters 22 of R, G, and B are formed in the region between the black matrices 21.
또한, 상기 하부기판(10) 및 상부기판(20)의 결과물 상부에는 각각 배향막(14,23)이 형성되고, 상기 하부기판(10)과 상부기판(20) 외측면상에는 각각 편광판(15,24)이 형성된다.In addition, alignment layers 14 and 23 may be formed on upper portions of the lower substrate 10 and the upper substrate 20, respectively, and polarizers 15 and 24 may be formed on the outer surfaces of the lower substrate 10 and the upper substrate 20, respectively. ) Is formed.
상기와 같은 구성을 FFS-LCD는 상기 카운터 전극(11)과 화소전극(12) 사이에전압차가 발생되면, 상기 카운터 전극(11)과 화소전극(12) 사이의 간격이 셀갭보다 좁은 것에 기인하여 그들간에 프린지 필드가 형성되고, 이와 같은 프린지 필드는 상기 카운터 전극(11)과 화소전극(12)의 폭이 미세한 것에 의해 그 상부에 배치된 액정분자들(30a)에도 영향을 미치게 된다.According to the above configuration, when the voltage difference is generated between the counter electrode 11 and the pixel electrode 12, the FFS-LCD is caused by the gap between the counter electrode 11 and the pixel electrode 12 being smaller than the cell gap. A fringe field is formed between them, and the fringe field affects the liquid crystal molecules 30a disposed thereon because the widths of the counter electrode 11 and the pixel electrode 12 are minute.
그러나 상기와 같은 종래의 FFS-LCD에 있어서는 다음과 같은 문제점이 있었다.However, in the conventional FFS-LCD as described above, there are the following problems.
상기와 같이 상부기판에 구동 전계의 이상현상을 방지하기 위해 전극을 형성하지 않으므로 상부기판에서 발생된 정전기가 방전(discharge)될 수 있는 통로(path)가 부족하여 상부기판에 정전기가 발생할 경우 취약한 특성이 나타난다.As the electrode is not formed to prevent abnormality of the driving electric field on the upper substrate as described above, the static electricity generated in the upper substrate lacks a path for discharging, and thus the characteristics of the upper substrate are weak. Appears.
즉, 상부기판에 발생된 정전기는 상부기판에 그대로 남아 있어 상부기판 표면에서 비이상적인 전위를 발생시켜 화면의 품위를 저하시킨다.In other words, the static electricity generated on the upper substrate remains on the upper substrate to generate an abnormal ideal potential on the surface of the upper substrate, thereby degrading the quality of the screen.
한편, 상기와 같이 발생된 정전기들이 방전되려면 충분한 시간이 지나야하는데 고전압의 정전기기 발생할 경우 이상 화질이 원상태로의 복귀가 회복불능의 상태까지 갈 수도 있다.On the other hand, sufficient time must pass for the generated static electricity to discharge, but when a high voltage static electricity occurs, the abnormal image quality may be returned to an unrecoverable state.
또한, 정전기 및 패널 주변부에서 얼룩 현상(mura)이 발생하여 화면의 품위 및 신뢰성을 저하시킨다.In addition, mura occurs in the static electricity and the panel periphery, thereby degrading the quality and reliability of the screen.
따라서, 본 발명은 상기 문제점을 해결하기 위하여 이루어진 것으로, 본 발명의 목적은 화소가 구동되는 액티브 영역에는 전극을 형성시키지 않고, 화면의 외각부에만 전극을 형성시킴으로 정전기 및 잔류 DC 스트레스에 의한 취약 특성을 제거하여 고화질 및 고신뢰성을 갖는 액정표시장치를 제공하는데 있다.Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is not to form an electrode in an active region in which a pixel is driven, but to form an electrode only at an outer portion of the screen, thereby being susceptible to static electricity and residual DC stress. It is to provide a liquid crystal display device having a high image quality and high reliability by removing the.
도 1은 종래의 액정표시장치의 단면도1 is a cross-sectional view of a conventional liquid crystal display device
도 2는 본 발명에 의한 액정표시장치의 단면도2 is a cross-sectional view of a liquid crystal display device according to the present invention.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
100 : 상부기판 101 : 블랙 매트릭스100: upper substrate 101: black matrix
102 : 컬러필터 103 : 제 2 전극102 color filter 103 second electrode
104, 204 : 배향막 105, 207 : 편광판104, 204: alignment film 105, 207: polarizing plate
200 : 하부기판 201 : 카운터 전극200: lower substrate 201: counter electrode
202 : 화소전극 203 : 게이트 절연막202: pixel electrode 203: gate insulating film
205 : 제 1 전극 300 : 액정층205: first electrode 300: liquid crystal layer
300a : 액정분자들 400 : 이송 통로300a: liquid crystal molecules 400: transfer path
상기 목적을 달성하기 위한 본 발명의 액정표시장치는, 소정거리를 갖으며 서로 대향되도록 배치된 하부기판 및 상부기판과, 상기 하부기판 내측면의 액티브 영역상에 게이트 절연막을 사이에 두고 형성된 카운터 전극 및 화소전극과, 상기 하부기판 내측면의 주변영역에 형성된 정전기 보호회로와, 상기 상부기판 내측면 액티브 영역상에 형성된 블랙 매트릭스와 컬러필터와, 상기 하부기판 및 상부기판의 주변영역중 패널의 외각부에 형성된 제 1, 제 2 전극과, 상기 상부기판에서 발생되는 정전기 전하를 상기 하부기판의 정전기 보호회로로 이송시키기 위해 상기 제 1, 제 2 전극을 연결시키는 이송 통로와, 상기 하부기판 및 상부기판 내측면의 액티브 영역상에 각각 형성된 제 1, 제 2 배향막과, 상기 하부기판 및 상부기판 외측면에 각각 형성된 제 1, 제 2 편광판으로 구성됨을 특징으로 한다.According to an aspect of the present invention, there is provided a liquid crystal display device including: a lower substrate and an upper substrate having a predetermined distance to face each other, and a counter electrode formed between the gate insulating layer on an active region of an inner surface of the lower substrate And a pixel electrode, an electrostatic protection circuit formed in a peripheral region of the inner side of the lower substrate, a black matrix and a color filter formed on the active region of the inner side of the upper substrate, and an outer shell of the panel among the peripheral regions of the lower substrate and the upper substrate. First and second electrodes formed on a portion, a transfer passage connecting the first and second electrodes to transfer the electrostatic charges generated from the upper substrate to the electrostatic protection circuit of the lower substrate, the lower substrate and the upper portion First and second alignment layers respectively formed on the active region of the inner surface of the substrate, and first and second alignment layers respectively formed on the outer surface of the lower substrate and the upper substrate; Characterized by a second polarizer configured.
또한, 상기 제 1, 제 2 전극은 외각부의 한면 또는 사면 전체여 형성되는 것이 바람직하다.In addition, the first and second electrodes are preferably formed on one surface or the entire slope of the outer portion.
또한, 상기 제 1, 제 2 전극은 투명한 전도체인 것이 바람직하다.In addition, the first and second electrodes are preferably transparent conductors.
또한, 상기 제 1, 제 2 전극은 상기 블랙 매트릭스에 의해 가려지는 패널의 외각부에 형성되는 것이 바람직하다.In addition, the first and second electrodes are preferably formed in the outer portion of the panel covered by the black matrix.
이하, 첨부된 도면을 참조하여 본 발명의 액정표시장치에 대하여 보다 상세히 설명하기로 한다.Hereinafter, a liquid crystal display of the present invention will be described in detail with reference to the accompanying drawings.
도 2는 본 발명에 의한 액정표시장치를 나타낸 단면도로서, FFS모드를 예로서 나타낸 것이다.2 is a cross-sectional view showing a liquid crystal display device according to the present invention, showing an FFS mode as an example.
도시된 바와 같이, 하부기판(100)과 상부기판(200)이 소정거리 즉, 셀갭만큼 사이를 두고 대향되도록 배치되어 있고, 상기 상부기판(200)과 하부기판(100) 사이에 수 개의 액정분자들(300a)을 포함한 액정층(300)이 배치된다.As shown, the lower substrate 100 and the upper substrate 200 are disposed to face each other with a predetermined distance, that is, a cell gap therebetween, and several liquid crystal molecules between the upper substrate 200 and the lower substrate 100. The liquid crystal layer 300 including the holes 300a is disposed.
한편, 상기 하부기판(100) 내측면의 액티브 영역상에는 액정분자들(300a)을 구동시키기 위한 카운터 전극(201)과 화소전극(202)이 게이트 절연막(203)을 사이에 두고 형성되고, 상기 주변영역중 패널의 외각부에 제 1 전극(205)이 형성된다. 이때, 상기 카운터 전극(201)과 화소전극(202) 그리고 제 1 전극(205)은 투명 전도체로 형성되며, 상기 카운터 전극(201)과 화소전극(202)간의 간격이 셀갭보다 좁게 되도록 형성된다.On the other hand, a counter electrode 201 and a pixel electrode 202 for driving the liquid crystal molecules 300a are formed on the inner side of the lower substrate 100 with the gate insulating film 203 interposed therebetween. The first electrode 205 is formed in the outer portion of the panel in the region. In this case, the counter electrode 201, the pixel electrode 202, and the first electrode 205 are formed of a transparent conductor, and the gap between the counter electrode 201 and the pixel electrode 202 is smaller than the cell gap.
여기서, 상기 제 1 전극(205)은 도면에는 도시하지 않았지만 하부기판 내측에 형성된 정전기 보호회로와 연결되어 있다.Although not shown in the drawing, the first electrode 205 is connected to an electrostatic protection circuit formed inside the lower substrate.
그리고 도면에는 도시하지 않았지만 상기 하부기판(200)의 액티브 영역상에는 단위화소가 한정되도록 게이트 라인 및 데이터 라인이 교차되도록 형성되고, 상기 게이트 라인과 데이터 라인 교차점에는 스위칭 소자로서 박막 트랜지스터가 형성된다.Although not shown in the drawing, a gate line and a data line are formed to intersect on the active region of the lower substrate 200 so that unit pixels are limited, and a thin film transistor is formed at the intersection of the gate line and the data line.
이어, 상기 상부기판(100) 내측면의 액티브 영역에 블랙 매트릭스(101)가 형성되고, 상기 블랙 매트릭스(101) 사이에 R, G, B 컬러필터(102)가 형성된다. 그리고 상기 주변영역의 패널 외각부에 투명 전도체로 제 2 전극(103)이 형성된다.Subsequently, a black matrix 101 is formed in the active region of the inner surface of the upper substrate 100, and R, G, and B color filters 102 are formed between the black matrix 101. In addition, a second electrode 103 is formed of a transparent conductor on an outer portion of the panel of the peripheral region.
또한, 상기 하부기판(200) 및 상부기판(100)의 결과물 상부에는 각각배향막(104,204)이 형성되고, 상기 하부기판(200)과 상부기판(100) 외측면상에는 각각 편광판(105,207)이 형성된다.In addition, alignment layers 104 and 204 are formed on the lower substrate 200 and the upper substrate 100, respectively, and polarizers 105 and 207 are formed on the outer surface of the lower substrate 200 and the upper substrate 100, respectively. .
그리고 상기 제 1, 제 2 전극(205,103)을 연결시키는 이송 통로(400)가 형성된다.In addition, a transfer passage 400 connecting the first and second electrodes 205 and 103 is formed.
여기서, 상기 제 1, 제 2 전극(205)(103)은 상기 블랙 매트릭스(101)에 의해 가려지는 패널의 외각부에 형성되고, 패널 외각부의 한면 또는 사면 전체에 형성된다.Here, the first and second electrodes 205 and 103 are formed on the outer portion of the panel covered by the black matrix 101 and are formed on one surface or the entire slope of the panel outer portion.
상기와 같이 구성된 본 발명의 FFS-LCD의 상부기판(100)에서 정전기가 발생할 경우, 발생된 정전기들은 상기 제 2 전극(103)으로 유입되고, 상기 제 2 전극(103)으로 유입된 정전기 전하(charge)들은 상기 이송 통로(400)를 통해 상기 하부기판(200)의 형성된 제 1 전극(205)으로 유입된다.When static electricity is generated in the upper substrate 100 of the FFS-LCD of the present invention configured as described above, the generated static electricity flows into the second electrode 103 and flows into the second electrode 103. Charges are introduced into the formed first electrode 205 of the lower substrate 200 through the transfer passage 400.
따라서, 상기 제 1 전극(205)은 정전기 보호회로와 연결되어 있으므로 상기 상부기판(100)에 발생된 쉽게 정전기를 방전시킬 수 있다.Therefore, since the first electrode 205 is connected to the static electricity protection circuit, the first electrode 205 may easily discharge static electricity generated in the upper substrate 100.
종래의 액정표시장치에서는 상판에 전극이 형성되지 않은 관계로 액티브 영역 외부에서는 주변부 회로에 의해 액정들이 비이상적인 동작이 발생하였다. 이러한 비이상적인 동작들은 블랙 매트릭스에 의해 가려져 육안으로는 인식이 안되지만 장시간 이러한 스트레스를 받게되면 이러한 스트레스가 액티브 영역내의 화소들에 영향을 줄 수가 있다. 그러나, 본 발명의 구조처럼 외곽부에 공통 전극이 형성되면 액정들이 상하판의 일정한 전계에 의해 고정되어 스트레스가 적게 형성되며 실제 화면에 보여지는 액티브 영역에도 스트레스가 영향을 주지 않게 된다. 이렇게되면 장시간 구동시에 대한 신뢰성도 좋아지게 되며 안정적이며 고화품을 제공할 수 있다.In the conventional liquid crystal display device, since electrodes are not formed on the upper plate, non-ideal operation of the liquid crystals occurs due to a peripheral circuit outside the active area. These non-ideal behaviors are obscured by the black matrix and are not visible to the naked eye, but if they are subjected to such stresses for a long time, these stresses may affect the pixels in the active region. However, when the common electrode is formed at the outer portion as in the structure of the present invention, the liquid crystals are fixed by a constant electric field of the upper and lower plates to form less stress, and the stress does not affect the active area shown on the actual screen. This improves reliability for long time operation and can provide a stable and high quality product.
본 발명은 FFS 모드를 예로 들어 설명하였지만, UFFS 모드와 IPS 모드에서 적용 가능하다. 즉, 본 발명의 구조는 FFS, UFFS, IPS 모드에서 상판 컬러필터(C/F)의 구조에 관한 것으로, 종래에는 상기 모드에서 구동 전계의 이상현상을 방지하기 위해서 상판에는 전극을 형성하지 않았으나, 본 발명에서는 종래와 같이 화소가 구동되는 액티브 영역에는 전극을 형성시키지 않고 화면의 외곽부에만 전극을 형성시키도록 한 것이다.Although the present invention has been described using the FFS mode as an example, the present invention can be applied in the UFFS mode and the IPS mode. That is, the structure of the present invention relates to the structure of the top plate color filter (C / F) in the FFS, UFFS, IPS mode, conventionally, in order to prevent the abnormal phenomenon of the driving electric field in the above mode, the electrode is not formed on the top plate, According to the present invention, electrodes are formed only at the outer portion of the screen without forming electrodes in the active region in which the pixel is driven as in the related art.
이상에서 설명한 바와 같이 본 발명의 액정표시장치에 의하면, 상부기판에서 발생되는 정전기를 하부기판에 형성된 정전기 보호회로를 통해 쉽게 방전시킬 수 있으므로 고화질을 갖는 고품위 디스플레이를 제공할 수 있는 효과가 있다.As described above, according to the liquid crystal display device of the present invention, since the static electricity generated in the upper substrate can be easily discharged through the static electricity protection circuit formed in the lower substrate, there is an effect of providing a high quality display having high quality.
또한, 화소가 형성되지 않는 패널 외각부에 투명 전도체로 이루어진 전극을 형성하므로 액정들이 하부기판과 상부기판의 일정한 전계에 의해 고정되어 스트레스를 적다. 따라서, 장시간 구동시 신뢰성이 향상되고 안정적이다.In addition, since an electrode made of a transparent conductor is formed at the outer portion of the panel where no pixel is formed, the liquid crystals are fixed by a constant electric field of the lower substrate and the upper substrate, thereby reducing stress. Therefore, reliability is improved and stable during long time driving.
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