KR102721410B1 - 액정표시장치 - Google Patents
액정표시장치 Download PDFInfo
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- KR102721410B1 KR102721410B1 KR1020160156439A KR20160156439A KR102721410B1 KR 102721410 B1 KR102721410 B1 KR 102721410B1 KR 1020160156439 A KR1020160156439 A KR 1020160156439A KR 20160156439 A KR20160156439 A KR 20160156439A KR 102721410 B1 KR102721410 B1 KR 102721410B1
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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
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/241—Light guide terminations
- G02B6/243—Light guide terminations as light absorbers
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- 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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
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- 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
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- 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
- G02B6/0055—Reflecting element, sheet or layer
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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
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- 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
- G02F1/133314—Back frames
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- 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
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- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- 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
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
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- 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
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- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
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- G—PHYSICS
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- 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
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- 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
- G02B6/0065—Manufacturing aspects; Material aspects
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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
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- G02F1/133311—Environmental protection, e.g. against dust or humidity
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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
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- G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
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- 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
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Abstract
더욱이, 광반사층인 제 1 층과 광흡수층인 제 2 층으로 이루어진 폼패드를 통하여 액정패널과 가이드패널 사이의 빛샘을 방지함과 동시에 액정표시장치의 테두리에서 암부 현상을 효과적으로 방지할 수 있게 된다.
Description
도 2는 본 발명의 제 1 실시예에 따른 액정표시장치를 개략적으로 도시한 분해 사시도이다.
도 3은 본 발명의 제 1 실시예에 따른 액정표시장치의 반입광부를 개략적으로 도시한 단면도이다.
도 4a는 본 발명의 제 1 실시예에 따른 액정표시장치의 도광판을 개략적으로 나타낸 사시도이다.
도 4b는 제 1 실시예에 따른 액정표시장치의 폼패드의 배치를 개략적으로 도시한 사시도이다.
도 4c는 본 발명의 제 1 실시예에 따른 액정표시장치의 광의 진행방향을 개략적으로 나타낸 단면도이다.
도 4d는 제 1 실시예에 따른 액정표시장치에 암부가 발생된 사진이다.
도 5는 본 발명의 제 2 실시예에 따른 액정표시장치의 반입광부를 개략적으로 도시한 단면도이다.
도 6a는 본 발명의 제 2 실시예에 따른 액정표시장치의 도광판을 개략적으로 나타낸 사시도이다.
도 6b는 제 2 실시예에 따른 액정표시장치의 폼패드의 배치를 개략적으로 도시한 사시도이다.
도 7은 본 발명의 제 2 실시예에 따른 액정표시장치의 광의 진행방향을 개략적으로 나타낸 단면도이다.
도 8은 제 2 실시예에 따른 액정표시장치에 암부가 개선된 사진이다.
214: 제 2 기판 219a: 제 1 편광판
219b: 제 2 편광판 223: 도광판
225: 제 1 반사판 227: 광학시트
230: 가이드패널 232: 본체부
232a: 내측면 232b: 평면
234: 수직부 234a: 제 4 면
234b: 제 5 면 234c: 제 6 면
236: 수평부 236a: 제 1 면
236b: 제 2면 236c: 제 3 면
250: 커버버툼 252: 제 1 수평면
254: 제 2 수평면 256: 수직면
260: 폼패드 262: 제 1 층
264: 제 2 층 270: 차광테이프
280: 제 2 반사판 W: 액정표시장치의 두께
d: 액정패널과 도광판의 간격 S1: 제 1 접착면
S2: 제 2 접착면 S3: 경계면
200: 액정표시장치
Claims (12)
- 액정패널과;
상기 액정패널 하부에 배치되고, 제 1 내지 제 4 측면을 포함하는 유리재질의 도광판과;
상기 도광판의 제 1 측면에 배치된 광원과;
상기 액정패널과 상기 도광판 사이에 배치된 광학시트와;
상기 도광판의 제 2 내지 제 4 측면 각각의 상면 가장자리에 대응되고, 상기 액정패널과 상기 도광판 사이에 배치된 폼패드와;
상기 도광판의 상기 제 2 내지 제 4 측면을 둘러싸는 가이드 패널
을 포함하며,
상기 제 1 측면에 반대인 상기 제 3 측면에 배치된 상기 폼패드는 상기 도광판과 접촉하는 광반사층인 제 1 층과 상기 제 1 층과 상기 액정패널 사이에 위치하는 광흡수층인 제 2 층을 포함하고,
상기 가이드 패널은 수평부 및 수직부를 포함하며,
상기 가이드 패널의 상기 수평부는 상기 도광판의 상기 제 3 측면과 마주보게 배치되고,
상기 폼패드의 상기 제 1 층은 상기 도광판의 상기 제 3 측면의 상기 상면 가장자리 및 상기 가이드 패널의 상기 수평부의 상부면에 부착되는 액정표시장치.
- 제 1 항에 있어서,
상기 도광판의 서로 마주하는 상기 제 2 측면 및 상기 제 4 측면에 배치된 상기 폼패드는 상기 도광판과 접촉하는 광반사층인 제 3 층과 상기 제 3 층과 상기 액정패널 사이에 위치하는 광흡수층인 제 4 층을 포함하는 액정표시장치.
- 제 1 항 또는 제 2 항에 있어서,
상기 제 1 층 및 제 3 층 각각은 화이트 재질 또는 은색 재질로 이루어지고,
상기 제 2 층 및 제 4 층 각각은 은 블랙 재질로 이루어진 액정표시장치.
- 제 3 항에 있어서,
상기 도광판의 하부에 배치되는 수평면과 수직면을 포함하는 커버버툼
을 더 포함하고,
상기 수평부는 상기 도광판의 상기 제 2 및 제 4 측면과 마주하고,
상기 수직부는 상기 커버버툼의 상기 수직면과 마주하는 액정표시장치.
- 제 4 항에 있어서,
상기 폼패드의 상기 제 2 층은 상기 액정패널에 부착되는 액정표시장치.
- 제 5 항에 있어서,
상기 폼패드와 상기 가이드 패널은 상기 도광판의 상기 제 1 측면에 대하여 개구된 형태를 갖는 액정표시장치.
- 제 4 항에 있어서,
상기 커버버툼과 상기 도광판의 사이에 제 1 반사판을 더 포함하는 액정표시장치.
- 제 7 항에 있어서,
상기 도광판의 상기 제 3 측면에 대응하여 상기 가이드 패널의 상기 수평부에 배치되는 제 2 반사판을 더 포함하는 액정표시장치.
- 제 4 항에 있어서,
상기 커버버툼은 유리재질로 이루어지며, 상기 수평부의 하부면과 상기 커버버툼 사이에 배치된 차광테이프를 더 포함하는 액정표시장치. - 제 1 항에 있어서,
상기 폼패드와 상기 광학시트는 동일한 두께를 갖는 액정표시장치.
- 제 1 항에 있어서,
상기 제 1 층은 상기 제 2 층보다 얇은 액정표시장치.
- 제 1 항에 있어서,
상기 가이드 패널의 상기 수평부는 상기 도광판의 상기 제 2 내지 제 4 측면과 마주하는 동일선상에 배치되는 액정표시장치.
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| KR1020160156439A KR102721410B1 (ko) | 2016-11-23 | 2016-11-23 | 액정표시장치 |
| US15/821,312 US10613371B2 (en) | 2016-11-23 | 2017-11-22 | Liquid crystal display device |
| CN201711173786.7A CN108089252B (zh) | 2016-11-23 | 2017-11-22 | 液晶显示装置 |
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| KR101946023B1 (ko) * | 2017-11-30 | 2019-02-08 | 엘지디스플레이 주식회사 | 액정표시장치 |
| KR20200078874A (ko) | 2018-12-24 | 2020-07-02 | 엘지디스플레이 주식회사 | 표시 장치 |
| EP4053621A4 (en) * | 2019-10-28 | 2023-06-28 | LG Electronics Inc. | Display device |
| TWI799685B (zh) * | 2020-03-06 | 2023-04-21 | 元太科技工業股份有限公司 | 前光模組與具有前光模組之顯示裝置 |
| WO2022012588A1 (zh) * | 2020-07-14 | 2022-01-20 | 海信视像科技股份有限公司 | 一种液晶显示装置 |
| WO2024101480A1 (ko) * | 2022-11-11 | 2024-05-16 | 엘지전자 주식회사 | 디스플레이 디바이스 |
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| Publication number | Publication date |
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| CN108089252B (zh) | 2020-02-07 |
| CN108089252A (zh) | 2018-05-29 |
| US10613371B2 (en) | 2020-04-07 |
| KR20180057942A (ko) | 2018-05-31 |
| US20180143488A1 (en) | 2018-05-24 |
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