KR102541940B1 - 광 밸브 패널과 이를 이용한 액정표시장치 - Google Patents
광 밸브 패널과 이를 이용한 액정표시장치 Download PDFInfo
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- KR102541940B1 KR102541940B1 KR1020160067778A KR20160067778A KR102541940B1 KR 102541940 B1 KR102541940 B1 KR 102541940B1 KR 1020160067778 A KR1020160067778 A KR 1020160067778A KR 20160067778 A KR20160067778 A KR 20160067778A KR 102541940 B1 KR102541940 B1 KR 102541940B1
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- voltage
- light valve
- liquid crystal
- electrode
- panel
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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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Power Engineering (AREA)
- Geometry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Abstract
본 발명에 의한 액정표시장치는 표시패널, 백라이트 유닛, 광 밸브 패널을 포함한다. 표시패널은 입력 영상이 기입되는 픽셀들을 포함한다. 백라이트 유닛은 표시패널에 빛을 조사한다. 광 밸브 패널은 표시패널과 백라이트 유닛 사이에 배치되어 입력 영상에 따라 백라이트 유닛으로부터의 광량을 조절한다.
Description
도 2는 도 1에 도시된 표시패널, 광 밸브 패널 및 백라이트 유닛의 적층 구조를 보여 주는 단면도이다.
도 3은 표시패널의 금속 배선들과 광 밸브 패널의 금속 배선들이 겹쳐질 때 초래되는 빛의 간섭으로 인하여 보이는 무아레를 보여 주는 도면이다.
도 4는 표시패널과 광 밸브 패널 간의 갭으로 인하여 발생하는 색(color) 왜곡을 보여 주는 도면이다.
도 5는 측면 시야각의 색 왜곡을 개선하기 위하여 광 밸브 패널에서 밝은 블록과 이웃하는 어두운 블록을 점등할 때 보이는 휘선 불량의 예를 보여 주는 도면이다.
도 6은 표시패널의 픽셀 데이터 변조 방법과 광 밸브 패널의 블록 휘도 제어 방법을 보여 주는 도면들이다.
도 7은 도 6에서 (C)의 제어 방법으로 표시패널의 데이터와 휘도를 제어할 때 측면 시야각에서 픽셀의 휘도를 보여 주는 도면이다.
도 8은 광 밸브 패널을 나타내는 단면도이다.
도 9는 본 발명의 패널 블록 분할을 나타내는 도면이다.
도 10은 본 발명에 의한 광 밸브 패널의 구동전압을 나타내는 도면이다.
도 11은 광 밸브 패널 액정층의 V-T 특성 곡선을 나타내는 도면이다.
도 12 내지 도 14는 블록 영상 표시과정에서 하부전극의 전압 강하 현상을 설명하는 도면들이다.
도 15 내지 도 16은 본 발명의 공통전압에 의해서 화이트마진을 확보하는 과정을 설명하는 도면들이다.
BLU: 백라이트 유닛 100: 제1 타이밍 콘트롤러
110: 제2 타이밍 콘트롤러 20: 제1 데이터 구동부
30: 게이트 구동부 50: 제2 데이터 구동부
CNT: 컨택홀 LVDL: 광 밸브 데이터라인
Claims (8)
- 액정층;
광 밸브 데이터라인을 통해 저전위전압과 고전위전압의 전압 범위 내에서 스윙하는 광 밸브 데이터전압을 인가받는 제1 전극; 및
상기 액정층을 사이에 두고 상기 제1 전극과 대향하고, 상기 광 밸브 데이터전압에 동기되어 동일한 위상으로 스윙하는 공통전압을 인가받는 제2 전극을 포함하고,
상기 공통전압은 상기 저전위전압과 고전위전압의 평균값인 기준공통전압을 기준으로, 상기 기준공통전압보다 소정의 변조전압만큼 큰 전압레벨과 상기 기준공통전압보다 상기 변조전압만큼 작은 전압레벨의 전압 범위 내에서 스윙하는 광 밸브 패널. - 제 1 항에 있어서,
상기 광 밸브 데이터전압과 상기 공통전압은 상기 기준공통전압 보다 큰 전압레벨의 정극성 전압과 상기 기준공통전압 보다 작은 전압레벨의 부극성 전압 사이에서 스윙하는 광 밸브 패널. - 제 2 항에 있어서,
상기 변조전압의 크기는
상기 액정층의 V-T 특성 곡선에서 화이트 마진 보다 크지 않은 광 밸브 패널. - 제 1 항에 있어서,
상기 제2 전극은 단일 전극막으로 이루어지고, 상기 광 밸브 데이터라인을 통해 인가받는 상기 광 밸브 데이터전압을 그라데이션(Gradation)하게 분배하는 광 밸브 패널. - 입력 영상이 기입되는 픽셀들이 배치되는 표시패널;
상기 표시패널에 빛을 조사하는 백라이트 유닛; 및
상기 표시패널과 상기 백라이트 유닛 사이에 배치되어 입력 영상에 따라 상기 백라이트 유닛으로부터의 광량을 조절하는 광 밸브 패널을 포함하고,
상기 광 밸브 패널은,
액정층;
광 밸브 데이터라인을 통해 저전위전압과 고전위전압의 전압 범위 내에서 스윙하는 광 밸브 데이터전압을 인가받는 제1 전극; 및
상기 액정층을 사이에 두고 상기 제1 전극과 대향하고, 상기 광 밸브 데이터전압에 동기되어 동일한 위상으로 스윙하는 공통전압을 인가받는 제2 전극을 포함하고,
상기 공통전압은 상기 저전위전압과 고전위전압의 평균값인 기준공통전압을 기준으로, 상기 기준공통전압보다 소정의 변조전압만큼 큰 전압레벨과 상기 기준공통전압보다 상기 변조전압만큼 작은 전압레벨의 전압 범위 내에서 스윙하는 액정표시장치. - 제 5 항에 있어서,
상기 광 밸브 데이터전압과 상기 공통전압은 상기 기준공통전압 보다 큰 전압레벨의 정극성 전압과 상기 기준공통전압 보다 작은 전압레벨의 부극성 전압 사이에서 스윙하는 액정표시장치. - 제 6 항에 있어서,
상기 변조전압의 크기는
상기 액정층의 V-T 특성 곡선에서 화이트 마진 보다 크지 않은 액정표시장치. - 제 5 항에 있어서,
상기 제2 전극은 단일 전극막으로 이루어지고, 상기 광 밸브 데이터라인을 통해 인가받는 상기 광 밸브 데이터전압을 그라데이션(Gradation)하게 분배하는 액정표시장치.
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