KR100894639B1 - Liquid Crystal Display - Google Patents

Liquid Crystal Display Download PDF

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Publication number
KR100894639B1
KR100894639B1 KR1020020039479A KR20020039479A KR100894639B1 KR 100894639 B1 KR100894639 B1 KR 100894639B1 KR 1020020039479 A KR1020020039479 A KR 1020020039479A KR 20020039479 A KR20020039479 A KR 20020039479A KR 100894639 B1 KR100894639 B1 KR 100894639B1
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South Korea
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liquid crystal
crystal panel
light
optical sheets
edge
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KR1020020039479A
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Korean (ko)
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KR20040005172A (en
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김진원
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엘지디스플레이 주식회사
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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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • 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
    • 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
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133311—Environmental protection, e.g. against dust or humidity
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements

Abstract

본 발명은 광학시트와 액정패널 사이로 이물질의 유입을 방지할 수 있는 액정표시장치에 관한 것이다.The present invention relates to a liquid crystal display device capable of preventing the inflow of foreign matter between the optical sheet and the liquid crystal panel.

본 발명에 따른 액정패널과, 광원으로부터의 광을 확산시키는 광학시트들과, 상기 액정패널과 광학시트들의 적층을 안내하는 서포트메인; 상기 광학시트들로부터의 광을 편광시키며 상기 액정패널의 가장자리 일부와 비중첩되도록 상기 액정패널과 상기 광학시트들 사이에 배치되는 편광판과, 상기 광학시트들 상의 보호시트로부터 확장되고 상기 서포트메인에 의해 지지되어 상기 액정패널의 가장자리 일부와 갭을 형성하는 보호시트 확장부와, 상기 갭을 구획하도록 상기 액정패널의 가장자리 일부와 상기 보호시트 확장부 사이에 배치되어 외부로부터의 이물질을 차단하는 이물방지패드를 구비하고, 상기 이물방지패드는 상기 액정패널의 가장자리 일부에 속하는 패드영역 중 블랙매트릭스영역 내에 위치하여 상기 편광판의 끝단과 이격공간을 형성한다.A liquid crystal panel according to the present invention, optical sheets for diffusing light from a light source, and a support main for guiding stacking of the liquid crystal panel and optical sheets; A polarizing plate disposed between the liquid crystal panel and the optical sheets so as to polarize light from the optical sheets and not overlap with a portion of an edge of the liquid crystal panel, and a support sheet extending from the protective sheet on the optical sheets, A protective sheet extension that is supported to form a gap with a portion of the edge of the liquid crystal panel, and a foreign matter prevention pad disposed between a portion of the edge of the liquid crystal panel and the protective sheet extension so as to partition the gap to block foreign substances from the outside. The foreign matter prevention pad is positioned in the black matrix area of the pad area belonging to a part of the edge of the liquid crystal panel to form a space with the end of the polarizing plate.

Description

액정표시장치{Liquid Crystal Display} Liquid Crystal Display             

도 1은 종래의 액정표시장치를 나타내는 평면도.1 is a plan view showing a conventional liquid crystal display device.

도 2는 도 1에 도시된 액정표시장치를 선 "A-A'"을 따라 절취한 단면도.FIG. 2 is a cross-sectional view of the liquid crystal display shown in FIG. 1 taken along line "A-A '"; FIG.

도 3a 및 도 3b는 도 2에 도시된 액정표시장치의 모서리부 D와 E를 확대하여 도시한 도면.3A and 3B are enlarged views of edges D and E of the liquid crystal display shown in FIG.

도 4는 도 3a의 편광판과 광학시트 사이에 이물질이 유입된 경우를 나타내는 도면.FIG. 4 is a view illustrating a case in which foreign matter is introduced between the polarizing plate and the optical sheet of FIG. 3A.

도 5는 본 발명의 실시 예에 따른 액정표시장치를 나타내는 단면도.5 is a cross-sectional view of an LCD device according to an exemplary embodiment of the present invention.

도 6a 및 도 6b는 도 5에 도시된 액정표시장치의 모서리부 F와 G를 확대하여 나타내는 도면.
6A and 6B are enlarged views of corners F and G of the LCD shown in FIG. 5;

〈도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

10 : 상판 12 : 하판10: top plate 12: bottom plate

14 : 상부 편광판 16 : 하부 편광판14 upper polarizing plate 16 lower polarizing plate

20 : 도광판 22 : 반사판20: light guide plate 22: reflecting plate

24 : 확산시트 26. 28 : 프리즘시트 24: diffusion sheet 26. 28: prism sheet                 

30 : 보호시트 32 : 탑케이스30: protective sheet 32: top case

34 : 커버버텀 36 : 서포트메인34: cover bottom 36: support main

50 : 이물방지패드50: foreign matter prevention pad

본 발명은 액정표시장치에 관한 것으로, 특히 광학시트와 액정패널 사이로 이물질의 유입을 방지할 수 있는 액정표시장치에 관한 것이다.The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device that can prevent the inflow of foreign matter between the optical sheet and the liquid crystal panel.

통상적으로 액정표시장치(Liquid Crystal Display; 이하 "LCD"라 함)는 전계를 이용하여 액정의 광투과율을 조절함으로써 화상이 표시된다. 이를 위하여, LCD는 액정셀들이 매트릭스 형태로 배열되어진 액정패널과, 이 액정패널을 구동하기 위한 구동회로를 구비한다. 액정패널에는 액정셀들 각각에 전계를 인가하기 위한 화소전극들과 기준전극, 즉 공통전극이 마련된다. 화소전극은 하부기판 상에 액정셀별로 형성되는 반면 공통전극은 상부기판의 전면에 일체화되어 형성된다. 화소전극들 각각은 스위칭소자로 사용되는 박막트랜지스터(Thin Film Transistor : 이하 "TFT"라 함)에 접속된다. 화소전극은 TFT를 통해 공급되는 데이터신호에 따라 공통전극과 함께 액정셀이 구동된다. 이러한 LCD는 브라운관에 비하여 소형화가 가능하며, 퍼스널 컴퓨터(Personal Computer)와 노트북 컴퓨터(Note Book Computer)는 물론, 복사기 등의 사무자동화기기, 휴대전화기나 호출기 등의 휴대기 기까지 광범위하게 이용되고 있다. In general, a liquid crystal display ("LCD") displays an image by adjusting the light transmittance of the liquid crystal using an electric field. To this end, the LCD includes a liquid crystal panel in which liquid crystal cells are arranged in a matrix, and a driving circuit for driving the liquid crystal panel. The liquid crystal panel is provided with pixel electrodes and a reference electrode, that is, a common electrode, for applying an electric field to each of the liquid crystal cells. The pixel electrode is formed for each liquid crystal cell on the lower substrate, while the common electrode is integrally formed on the front surface of the upper substrate. Each of the pixel electrodes is connected to a thin film transistor (hereinafter referred to as "TFT") used as a switching element. The liquid crystal cell is driven along with the common electrode in accordance with the data signal supplied through the TFT. Such LCDs can be miniaturized compared to CRTs, and are widely used in personal computers and notebook computers, as well as office automation devices such as photocopiers, mobile phones and pagers. .

도 1은 종래의 액정표시장치의 평면도를 나타내며, 도 2는 도 1에 도시된 액정표시장치를 선 "A-A'"을 따라 절취한 단면도이다. 1 is a plan view of a conventional liquid crystal display device, and FIG. 2 is a cross-sectional view of the liquid crystal display device shown in FIG. 1 taken along the line "A-A '".

도 1 및 도 2를 참조하면, 종래의 액정표시장치는 서포트메인(Support Main, 36)과, 서포트메인(36)의 내부에 적층되는 백라이트 유닛 및 액정패널과, 서포트메인(36)의 일측 저면과 측면을 감싸는 커버버텀(Cover Bottom, 34)과, 액정패널의 가장자리와 커버버텀(34)을 감싸는 탑케이스(Top Case, 32)를 구비한다. 1 and 2, a conventional liquid crystal display device includes a support main 36, a backlight unit and a liquid crystal panel stacked inside the support main 36, and a bottom of one side of the support main 36. And a cover bottom (34) surrounding the side and the side, and a top case (32) surrounding the edge of the liquid crystal panel and the cover bottom (34).

서포트메인(36)의 내부에는 반사판(22), 도광판(20), 확산시트(24), 프리즘시트(26, 28) 및 보호시트(30)가 순차적으로 적층된 백라이트 유닛이 적층되고, 백라이트 유닛 상에 상판(10)과 하판(12) 바깥으로 상부 및 하부 편광판(14, 16)이 부착된 액정패널이 적층된다.Inside the support main 36, a backlight unit in which the reflective plate 22, the light guide plate 20, the diffusion sheet 24, the prism sheets 26 and 28, and the protective sheet 30 are sequentially stacked is stacked, and the backlight unit is stacked. On top of the upper plate 10 and the lower plate 12, the upper and lower liquid crystal panels 14 and 16 are attached.

백라이트 유닛은 도시되지 않은 광원으로부터의 광을 면광원으로 전환하기 위한 도광판(20)과, 도광판(20)의 배면에 위치하여 도광판(20) 후면으로 방출되는 광을 액정패널 쪽으로 반사시키기 위한 반사판(22)과, 도광판(20)으로부터 출사된 광을 확산시키기 위한 확산시트(24)와, 확산시트(24)로부터의 광을 집광시키기 위한 프리즘시트(26, 28)와, 상기 프리즘시트(28)를 보호하기 위한 보호시트(30)로 이루어진다. The backlight unit includes a light guide plate 20 for converting light from a light source (not shown) into a surface light source, and a reflector plate for reflecting light emitted to the rear surface of the light guide plate 20 on the rear surface of the light guide plate 20. 22, a diffusion sheet 24 for diffusing light emitted from the light guide plate 20, prism sheets 26 and 28 for condensing light from the diffusion sheet 24, and the prism sheet 28 It consists of a protective sheet (30) for protecting the.

액정패널은 기판 상에 블랙매트릭스를 포함한 컬러필터 어레이(Color filter array), 공통전극 및 배향막이 순차적으로 형성된 상판(10)과, 기판 상에 형성된 TFT 어레이를 포함하는 화소전극, 및 배향막이 순차적으로 형성된 하판(12)과, 상판(10) 상에 부착된 상부 편광판(14)과, 하판(12) 아래에 부착된 하부 편광판(16)과, 상기 상판(10)과 하판(12) 사이의 갭을 유지시키는 도시되지 않은 스페이서와, 상기 상판(10)과 하판(12)은 도시되지 않은 실런트(Sealant)에 의해 합착되며 그 상/하판(10, 12) 사이의 공간에 주입된 액정으로 구성된다. 액정패널의 가장자리에는 블랙매트릭스영역(B)과, 게이트패드들과 데이터패드들이 존재하는 패드영역(C)이 존재한다. 탑케이스(32)는 액정패널과 여러 광학시트들의 표면 가장자리 및 측면을 감싸도록 설치된다. 이러한 탑케이스(32)는 액정패널의 가장자리를 감싸므로써 외부 충격으로부터 액정패널을 보호하게 된다.The liquid crystal panel includes a color filter array including a black matrix on a substrate, a top plate 10 in which a common electrode and an alignment layer are sequentially formed, a pixel electrode including a TFT array formed on the substrate, and an alignment layer in sequence. The lower plate 12 formed, the upper polarizing plate 14 attached to the upper plate 10, the lower polarizing plate 16 attached to the lower plate 12, and a gap between the upper plate 10 and the lower plate 12. The upper plate 10 and the lower plate 12 are bonded to each other by a sealant (not shown) and retained by a liquid crystal injected into a space between the upper and lower plates 10 and 12. . The black matrix area B and the pad area C including the gate pads and the data pads exist at the edge of the liquid crystal panel. The top case 32 is installed to surround the surface edges and sides of the liquid crystal panel and various optical sheets. The top case 32 surrounds the edge of the liquid crystal panel to protect the liquid crystal panel from external impact.

서포트메인(34)은 백라이트 유닛(10) 상에 설치됨과 아울러 액정패널(20)을 안착시킴으로써 액정표시장치 전체를 지지하는 역할을 한다. The support main 34 is installed on the backlight unit 10 and supports the entire liquid crystal display by mounting the liquid crystal panel 20.

이러한 구성을 가지는 액정표시장치의 양측 모서리를 확대하면 도 3a 및 도 3b에 도시된 바와 같다.When both edges of the liquid crystal display having the above configuration are enlarged, as shown in FIGS. 3A and 3B.

한편, 서포트메인(36)에 백라이트 유닛과 액정패널을 순차적으로 적층할 때, 도 4에 도시된 바와 같이 백라이트 유닛과 액정패널 사이에 이물질(38)이 유입될 수 있다. Meanwhile, when the backlight unit and the liquid crystal panel are sequentially stacked on the support main 36, the foreign substance 38 may flow between the backlight unit and the liquid crystal panel as illustrated in FIG. 4.

이를 상세히 하면, 액정표시장치의 조립과정은 먼저 서포트메인(36) 내부에 반사판(22)이 최저층으로 놓이게 되고, 그 반사판(22) 상에 도광판(20)이 올려지며, 도광판(20) 상에 광학시트들(24, 26, 28, 30)이 놓이게 된다. 이 광학시트들(24, 26, 28, 30) 상에 일체화된 액정패널이 올려지게 되는데, 액정패널을 적층시키면서 액정패널의 기판들과 서포트메인(36)이 부딪치게 되어 외부의 이물질(38)이 액정패널의 하부 편광판(16)과 광학시트들 사이에 유입된다. 또는, 액정표시장치를 고정시키기 위하여 나사 체결시 커버버텀(34) 또는 서포트메인(36)으로부터 금속성의 이물질이 발생되어 액정패널과 백라이트 유닛 사이에 유입된다. 이렇게 유입된 이물질에 의해 백라이트 유닛으로부터의 광의 진행경로를 방해하여 이물질(38)에 대응되는 영역의 광이 투과되지 못하여 화상표시부에 얼룩이 나타나는 문제점이 생긴다. In detail, in the assembling process of the liquid crystal display, first, the reflecting plate 22 is placed as the lowest layer in the support main 36, and the light guide plate 20 is placed on the reflecting plate 22, and the light guide plate 20 is placed on the light guide plate 20. The optical sheets 24, 26, 28, 30 are placed. The liquid crystal panel integrated on the optical sheets 24, 26, 28, and 30 is mounted. The substrates of the liquid crystal panel and the support main 36 collide with each other while the liquid crystal panels are stacked, so that an external foreign matter 38 is formed. It is introduced between the lower polarizing plate 16 and the optical sheets of the liquid crystal panel. Alternatively, when the screw is fastened to fix the liquid crystal display, a metallic foreign substance is generated from the cover bottom 34 or the support main 36 and flows between the liquid crystal panel and the backlight unit. As a result of the foreign substances introduced in this way, the path of the light from the backlight unit is disturbed, so that the light of the region corresponding to the foreign substances 38 cannot be transmitted, resulting in unevenness of the image display unit.

따라서, 본 발명의 목적은 이물방지패드를 설치함으로써 광학시트와 액정패널 사이로 이물질의 유입을 방지할 수 있는 액정표시장치를 제공하는데 있다. Accordingly, an object of the present invention is to provide a liquid crystal display device capable of preventing the inflow of foreign matter between the optical sheet and the liquid crystal panel by providing a foreign matter prevention pad.

상기 목적을 달성하기 위하여, 본 발명에 따른 액정표시장치는 액정패널과, 광원으로부터의 광을 확산시키는 광학시트들과, 상기 액정패널과 광학시트들의 적층을 안내하는 서포트메인; 상기 광학시트들로부터의 광을 편광시키며 상기 액정패널의 가장자리 일부와 비중첩되도록 상기 액정패널과 상기 광학시트들 사이에 배치되는 편광판과, 상기 광학시트들 상의 보호시트로부터 확장되고 상기 서포트메인에 의해 지지되어 상기 액정패널의 가장자리 일부와 갭을 형성하는 보호시트 확장부와, 상기 갭을 구획하도록 상기 액정패널의 가장자리 일부와 상기 보호시트 확장부 사이에 배치되어 외부로부터의 이물질을 차단하는 이물방지패드를 구비하고, 상기 이물방지패드는 상기 액정패널의 가장자리 일부에 속하는 패드영역 중 블랙매트릭스영역 내에 위치하여 상기 편광판의 끝단과 이격공간을 형성한다.
상기 액정패널은, 상기 편광판으로부터 편광된 광의 광투과율을 조절하기 위한 화소전압이 공급되는 하판과, 상기 하판과 대향되게끔 이격되며 상기 광투과율을 조절하기 위한 공통전압이 공급되는 상판을 구비한다.
상기 광학시트들은, 광을 확산시키는 확산시트와, 상기 확산시트 상에 설치되어 상기 액정패널에 수직으로 광을 입사시키기 위하여 광을 집광시키는 둘 이상의 프리즘시트들과, 상기 프리즘시트들 상에 설치되어 상기 프리즘시트를 보호하는 보호시트로 구비한다.
상기 광원으로부터의 광을 면광원으로 전환하여 상기 광학시트들로 진행시키게 하는 도광판을 추가로 구비한다.
상기 이물방지패드는 상기 편광판과 동일한 높이를 가지며, 1 ~ 2mm의 폭을 가진다.In order to achieve the above object, the liquid crystal display device according to the present invention includes a liquid crystal panel, optical sheets for diffusing light from a light source, and a support main for guiding the stack of the liquid crystal panel and the optical sheets; A polarizing plate disposed between the liquid crystal panel and the optical sheets so as to polarize light from the optical sheets and not overlap with a portion of an edge of the liquid crystal panel, and a support sheet extending from the protective sheet on the optical sheets, A protective sheet extension that is supported to form a gap with a portion of the edge of the liquid crystal panel, and a foreign matter prevention pad disposed between a portion of the edge of the liquid crystal panel and the protective sheet extension so as to partition the gap to block foreign substances from the outside. The foreign matter prevention pad is positioned in the black matrix area of the pad area belonging to a part of the edge of the liquid crystal panel to form a space with the end of the polarizing plate.
The liquid crystal panel includes a lower plate to which a pixel voltage for adjusting the light transmittance of light polarized from the polarizing plate is supplied, and an upper plate spaced apart from the lower plate and supplied with a common voltage for adjusting the light transmittance.
The optical sheets may include a diffusion sheet for diffusing light, two or more prism sheets disposed on the diffusion sheet and condensing light to inject light perpendicular to the liquid crystal panel, and on the prism sheets. It is provided as a protective sheet for protecting the prism sheet.
A light guide plate is further provided for converting light from the light source into a surface light source to advance the optical sheets.
The foreign matter prevention pad has the same height as the polarizer and has a width of 1 to 2 mm.

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상기 이물방지패드는 3 ~ 4mm의 폭을 가지는 블랙매트릭스영역에 형성됨과 아울러 6 ~ 7mm의 폭을 가지는 패드영역에 형성된다.The foreign matter prevention pad is formed in a black matrix area having a width of 3 to 4 mm and a pad area having a width of 6 to 7 mm.

상기 목적들 외에 본 발명의 다른 목적 및 특징들은 첨부한 도면들을 참조한 실시 예에 대한 설명을 통하여 명백하게 드러나게 될 것이다. Other objects and features of the present invention in addition to the above objects will be apparent from the description of the embodiments with reference to the accompanying drawings.

이하, 도 5 내지 도 6b를 참조하여 본 발명의 바람직한 실시 예에 대하여 설 명하기로 한다. Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 5 to 6B.

도 5를 참조하면, 본 발명에 따른 액정표시장치는 하부 편광판(16)으로 이물질 유입을 차단하도록 액정패널의 하판(12)과 광학시트 사이에 이물방지패드(50)를 설치함과 아울러 보호시트(40)를 확장시켜 액정패널과 광학시트 사이의 공간을 차단한다. 여기서, 이물방지패드(50)는 하부 편광판(16)과 소정 간격(52)으로 이격된다.Referring to FIG. 5, the liquid crystal display according to the present invention is provided with a foreign matter prevention pad 50 between the lower plate 12 and the optical sheet of the liquid crystal panel to block foreign substances from entering into the lower polarizing plate 16. 40 extends to block the space between the liquid crystal panel and the optical sheet. Here, the foreign matter prevention pad 50 is spaced apart from the lower polarizing plate 16 at a predetermined interval 52.

또한, 본 발명에 따른 액정표시장치는 종래와 동일하게 서포트메인(36)과, 서포트메인(36)의 내부에 적층되는 백라이트 유닛 및 액정패널과, 서포트메인(36)의 일측 저면과 측면을 감싸는 커버버텀(34)과, 액정패널의 가장자리와 커버버텀(34)을 감싸는 탑케이스(32)를 추가로 구비한다. In addition, the liquid crystal display device according to the present invention surrounds the support main 36, the backlight unit and the liquid crystal panel stacked inside the support main 36, and the bottom and side surfaces of one side of the support main 36. A cover bottom 34 and a top case 32 surrounding the edge of the liquid crystal panel and the cover bottom 34 are further provided.

탑케이스(32)는 액정패널과 여러 광학시트들의 표면 가장자리 및 측면을 감싸도록 설치된다. 이러한 탑케이스(32)는 액정패널의 가장자리를 감싸므로써 외부 충격으로부터 액정패널을 보호하게 된다. The top case 32 is installed to surround the surface edges and sides of the liquid crystal panel and various optical sheets. The top case 32 surrounds the edge of the liquid crystal panel to protect the liquid crystal panel from external impact.

서포트메인(36)은 액정표시장치 전체를 지지하며, 서포트메인(36)의 내부에는 백라이트 유닛과 액정패널이 적층된다. The support main 36 supports the entire liquid crystal display, and a backlight unit and a liquid crystal panel are stacked in the support main 36.

백라이트 유닛은 도시되지 않은 광원으로부터의 광을 면광원으로 전환하기 위한 도광판(20)과, 도광판(20)의 배면에 위치하여 도광판(20) 후면으로 방출되는 광을 액정패널 쪽으로 반사시키기 위한 반사판(22)과, 도광판(20)으로부터 출사된 광을 확산시키기 위한 확산시트(24)와, 확산시트(24)로부터의 광을 집광시키기 위한 프리즘시트(26, 28)와, 상기 프리즘시트(28)를 보호하기 위한 보호시트(40)로 이루어진다. The backlight unit includes a light guide plate 20 for converting light from a light source (not shown) into a surface light source, and a reflector plate for reflecting light emitted to the rear surface of the light guide plate 20 on the rear surface of the light guide plate 20. 22, a diffusion sheet 24 for diffusing light emitted from the light guide plate 20, prism sheets 26 and 28 for condensing light from the diffusion sheet 24, and the prism sheet 28 It consists of a protective sheet 40 for protecting.

액정패널은 기판 상에 블랙매트릭스를 포함한 컬러필터 어레이(Color filter array), 공통전극 및 배향막이 순차적으로 형성된 상판(10)과, 기판 상에 형성된 TFT 어레이를 포함하는 화소전극, 및 배향막이 순차적으로 형성된 하판(12)과, 상판(10) 상에 부착된 상부 편광판(14)과, 하판(12) 아래에 부착된 하부 편광판(16)과, 상기 상판(10)과 하판(12) 사이의 갭을 유지시키는 도시되지 않은 스페이서와, 상기 상판(10)과 하판(12)은 도시되지 않은 실런트(Sealant)에 의해 합착되며 그 상/하판(10, 12) 사이의 공간에 주입된 액정으로 구성된다. The liquid crystal panel includes a color filter array including a black matrix on a substrate, a top plate 10 in which a common electrode and an alignment layer are sequentially formed, a pixel electrode including a TFT array formed on the substrate, and an alignment layer in sequence. The lower plate 12 formed, the upper polarizing plate 14 attached to the upper plate 10, the lower polarizing plate 16 attached to the lower plate 12, and a gap between the upper plate 10 and the lower plate 12. The upper plate 10 and the lower plate 12 are bonded to each other by a sealant (not shown) and retained by a liquid crystal injected into a space between the upper and lower plates 10 and 12. .

액정표시장치의 가장자리에는 블랙매트릭스영역(B)과, 게이트패드들과 데이터패드들이 존재하는 패드영역(C)이 존재한다. 이 영역(B, C)은 화상을 표시하지 않는 비표시영역으로 이 영역(B, C)에 이물방지패드(50) 설치한다. 다시 말하면, 하부 편광판(16)의 가장자리 끝단을 블랙매트릭스영역(B) 및 패드영역(C)과 최소로 중첩되게 함으로써 백라이트 유닛의 광학시트들과 액정패널 사이에 소정 공간을 마련한 후, 이 빈 공간에 이물방지패드(50)를 형성한다. 다시 말하면, 패드영역(C)과 블매트릭스영역(B)에 대응되는 하부 평관판(16)의 끝단을 액정패널의 중앙 안쪽으로 들어가게끔 형성하고, 안쪽으로 들어감으로써 마련된 블랙매트릭스영역(B) 및 패드영역(C)에 이물방지패드(50)를 형성한다. 이때, 이물방지패드(50)는 약 1 ~ 2mm의 폭을 가진다. 블랙매트릭스영역(B)은 3 ~ 4mm 정도의 폭을 가지며, 패드영역(C)은 6 ~ 7mm 정도의 폭을 가진다. 패드영역(C)은 블랙매트릭스영역(B)보다 넓으므로 이물방지패드(50)를 패드영역(C) 내의 범위에서 액정패널 안쪽으로 형성시킬 수 있다. 이물방지패드(50)는 하부 편광판(16)과 동일한 높이를 가지게끔 형성된다. The black matrix area B and the pad area C including the gate pads and the data pads exist at the edge of the liquid crystal display. This area B, C is a non-display area which does not display an image, and the foreign matter prevention pad 50 is provided in this area B, C. As shown in FIG. In other words, the edge end of the lower polarizing plate 16 is overlapped with the black matrix area B and the pad area C at a minimum to provide a predetermined space between the optical sheets of the backlight unit and the liquid crystal panel, and then the empty space. To form a foreign matter prevention pad (50). In other words, the end of the lower flat plate 16 corresponding to the pad region C and the matrix matrix B is formed so as to enter the inside of the center of the liquid crystal panel, and the black matrix region B provided by entering the inside is formed. The foreign matter prevention pad 50 is formed in the pad area C. FIG. At this time, the foreign matter prevention pad 50 has a width of about 1 ~ 2mm. The black matrix area B has a width of about 3 to 4 mm, and the pad area C has a width of about 6 to 7 mm. Since the pad region C is wider than the black matrix region B, the foreign matter prevention pad 50 can be formed inside the liquid crystal panel within the pad region C. As shown in FIG. The foreign matter prevention pad 50 is formed to have the same height as the lower polarizer 16.

이물방지패드(50)는 액정표시장치의 조립과정 중에서 액정패널의 기판들과 서포트메인(36)이 부딪치면서 발생된 이물질이 액정패널의 하부 편광판(16)과 광학시트들 사이에 유입되는 것을 막는다. The foreign matter prevention pad 50 prevents foreign substances generated when the substrates of the liquid crystal panel collide with the support main 36 during the assembly of the liquid crystal display device, and flows in between the lower polarizing plate 16 and the optical sheets of the liquid crystal panel. .

한편, 보호시트(40)는 끝단에서 확장되어 서포트메인(36) 상에 안착됨과 아울러 액정패널과 광학시트 사이의 공간을 분리하는 보호시트 확장부(40a)를 구비한다. 보호시트 확장부(40a)는 이물방지패드(50)를 지지함과 아울러 액정패널과 광학시트 사이의 공간을 분리함으로써 외부로터 유입되는 이물질을 차단한다. On the other hand, the protective sheet 40 is extended from the end is provided on the support main 36, and provided with a protective sheet expansion portion 40a for separating the space between the liquid crystal panel and the optical sheet. The protective sheet expansion portion 40a supports the foreign matter prevention pad 50 and separates the space between the liquid crystal panel and the optical sheet to block foreign substances introduced from the outside.

도 6a 및 도 6b는 이물방지패드(50)가 설치된 액정표시장치의 양측부(F, G)를 확대한 도면이며, 이물방지패드(50)와 하부 편광판(16) 사이에는 이격공간(52)이 마련된다. 이격공간(52)은 액정표시장치를 조립하는 과정에서 발생되어 하부 편광판(16)에 유입되는 이물질이 벗어나지 못하도록 머무르게 함으로써 하부 편광판(16)과 광학시트 사이에 이물질이 유입되는 것을 방지한다. 6A and 6B are enlarged views of both sides F and G of the liquid crystal display device in which the foreign matter prevention pad 50 is installed, and the separation space 52 is disposed between the foreign matter prevention pad 50 and the lower polarizer 16. Is provided. The separation space 52 is generated in the process of assembling the liquid crystal display to prevent foreign substances flowing into the lower polarizing plate 16 from being released so as to prevent foreign substances from flowing between the lower polarizing plate 16 and the optical sheet.

상술한 바와 같이, 본 발명에 따른 액정표시장치는 가장자리 비표시영역의 백라이트 유닛의 광학시트와 액정패널의 하판 사이에 이물방지패드가 설치된다. 이에 따라, 본 발명에 따른 액정표시장치는 외부로부터 발생된 이물질을 액정표시장치 내부로 유입되는 것을 막을 수 있다. 또한, 본 발명에 따른 액정표시장치는 하부 편광판과 소정 이격공간을 두고 이물방지패드를 설치함으로써 소정 이격공간에 외부로부터의 이물질을 잡아둘 수 있어 궁극적으로 액정표시장치의 내부로 이물질 유입을 방지할 수 있다. As described above, the liquid crystal display according to the present invention is provided with a foreign matter prevention pad between the optical sheet of the backlight unit of the edge non-display area and the lower plate of the liquid crystal panel. Accordingly, the liquid crystal display according to the present invention can prevent foreign substances generated from the outside from flowing into the liquid crystal display. In addition, the liquid crystal display device according to the present invention can hold a foreign material from the outside in a predetermined space by installing a foreign matter prevention pad with a lower polarizing plate and a predetermined space, ultimately to prevent the inflow of foreign matter into the liquid crystal display device. Can be.

이상 설명한 내용을 통해 당업자라면 본 발명의 기술사상을 일탈하지 아니하는 범위에서 다양한 변경 및 수정이 가능함을 알 수 있을 것이다. 따라서, 본 발명의 기술적 범위는 명세서의 상세한 설명에 기재된 내용으로 한정되는 것이 아니라 특허 청구의 범위에 의해 정하여 져야만 할 것이다. Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (8)

액정패널과,LCD panel, 광원으로부터의 광을 확산시키는 광학시트들과,Optical sheets for diffusing light from a light source, 상기 액정패널과 광학시트들의 적층을 안내하는 서포트메인;A support main for guiding the stack of the liquid crystal panel and the optical sheets; 상기 광학시트들로부터의 광을 편광시키며 상기 액정패널의 가장자리 일부와 비중첩되도록 상기 액정패널과 상기 광학시트들 사이에 배치되는 편광판과,A polarizing plate disposed between the liquid crystal panel and the optical sheets so as to polarize light from the optical sheets and not overlap with a portion of an edge of the liquid crystal panel; 상기 광학시트들 상의 보호시트로부터 확장되고 상기 서포트메인에 의해 지지되어 상기 액정패널의 가장자리 일부와 갭을 형성하는 보호시트 확장부와,A protective sheet extension extending from the protective sheet on the optical sheets and supported by the support main to form a gap with a portion of an edge of the liquid crystal panel; 상기 갭을 구획하도록 상기 액정패널의 가장자리 일부와 상기 보호시트 확장부 사이에 배치되어 외부로부터의 이물질을 차단하는 이물방지패드를 구비하고,A foreign matter prevention pad disposed between a portion of an edge of the liquid crystal panel and the protective sheet extension part so as to partition the gap and blocking foreign substances from the outside; 상기 이물방지패드는 상기 액정패널의 가장자리 일부에 속하는 패드영역 중 블랙매트릭스영역 내에 위치하여 상기 편광판의 끝단과 이격공간을 형성하는 것을 특징으로 하는 액정표시장치.And the foreign material prevention pad is positioned in a black matrix area of a pad area belonging to a portion of an edge of the liquid crystal panel to form a space between the end of the polarizer and a space. 제 1 항에 있어서,The method of claim 1, 상기 액정패널은, The liquid crystal panel, 상기 편광판으로부터 편광된 광의 광투과율을 조절하기 위한 화소전압이 공급되는 하판과,A lower plate to which a pixel voltage for adjusting a light transmittance of light polarized from the polarizing plate is supplied; 상기 하판과 대향되게끔 이격되며 상기 광투과율을 조절하기 위한 공통전압이 공급되는 상판을 구비하는 것을 특징으로 하는 액정표시장치.And an upper plate spaced apart from the lower plate and supplied with a common voltage for controlling the light transmittance. 삭제delete 제 1 항에 있어서,The method of claim 1, 상기 광학시트들은,The optical sheets, 광을 확산시키는 확산시트와,A diffusion sheet for diffusing light, 상기 확산시트 상에 설치되어 상기 액정패널에 수직으로 광을 입사시키기 위하여 광을 집광시키는 둘 이상의 프리즘시트들과, Two or more prism sheets disposed on the diffusion sheet and condensing light to inject light perpendicular to the liquid crystal panel; 상기 프리즘시트들 상에 설치되어 상기 프리즘시트를 보호하는 보호시트를 구비하는 것을 특징으로 하는 액정표시장치.And a protective sheet provided on the prism sheets to protect the prism sheet. 제 1 항에 있어서,The method of claim 1, 상기 광원으로부터의 광을 면광원으로 전환하여 상기 광학시트들로 진행시키게 하는 도광판을 추가로 구비하는 것을 특징으로 하는 액정표시장치. And a light guide plate for converting light from the light source into a surface light source to advance the optical sheets. 제 1 항에 있어서,The method of claim 1, 상기 이물방지패드는 상기 편광판과 동일한 높이를 가지며, 1 ~ 2mm의 폭을 가지는 것을 특징으로 하는 액정표시장치.The foreign matter prevention pad has the same height as the polarizing plate, and has a width of 1 ~ 2mm. 삭제delete 제 1 항에 있어서, The method of claim 1, 상기 이물방지패드는 3 ~ 4mm의 폭을 가지는 상기 블랙매트릭스영역에 형성됨과 아울러 6 ~ 7mm의 폭을 가지는 상기 패드영역에 형성되는 것을 특징으로 하는 액정표시장치. And the foreign material prevention pad is formed in the black matrix area having a width of 3 to 4 mm and formed in the pad area having a width of 6 to 7 mm.
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