KR100776501B1 - 외광감지센서 및 이를 이용한 액정표시장치 - Google Patents
외광감지센서 및 이를 이용한 액정표시장치 Download PDFInfo
- Publication number
- KR100776501B1 KR100776501B1 KR1020060034697A KR20060034697A KR100776501B1 KR 100776501 B1 KR100776501 B1 KR 100776501B1 KR 1020060034697 A KR1020060034697 A KR 1020060034697A KR 20060034697 A KR20060034697 A KR 20060034697A KR 100776501 B1 KR100776501 B1 KR 100776501B1
- Authority
- KR
- South Korea
- Prior art keywords
- transistor
- external light
- liquid crystal
- power supply
- backlight
- Prior art date
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- 239000004973 liquid crystal related substance Substances 0.000 title claims description 44
- 230000003287 optical effect Effects 0.000 title 1
- 230000002093 peripheral effect Effects 0.000 title 1
- 230000004044 response Effects 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 210000002858 crystal cell Anatomy 0.000 claims description 20
- 239000011159 matrix material Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 abstract description 13
- 230000003071 parasitic effect Effects 0.000 abstract description 9
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
Classifications
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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
- G02F1/0121—Operation of devices; Circuit arrangements, not otherwise provided for in this subclass
- G02F1/0123—Circuits for the control or stabilisation of the bias voltage, e.g. automatic bias control [ABC] feedback loops
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims (7)
- 제1 전원과 상기 제1 전원보다 낮은 전압값을 가지는 제2 전원 사이에 접속되며, 제어신호에 대응하여 턴-온 또는 턴-오프되는 제1 트랜지스터; 및상기 제1 트랜지스터와 상기 제2 전원 사이에 접속되며, 외광의 세기에 대응하여 상기 제1 트랜지스터로부터 상기 제2 전원으로 흐르는 전류량을 제어하는 제2 트랜지스터를 구비하며,상기 제2 트랜지스터의 게이트 전극은 상기 제2 전원에 전기적으로 접속되어 역방향 다이오드 연결되는 것을 특징으로 하는 외광감지센서.
- 제1 항에 있어서,상기 제2 트랜지스터의 채널폭은 1000㎛ 내지 56000㎛로 설정되는 것을 특징으로 하는 외광감지센서.
- 제1 항에 있어서,상기 제1 및 제2 트랜지스터는 엔(N)-타입 트랜지스터인 외광감지센서.
- 제1 항에 있어서,상기 제1 트랜지스터는 엔(N)-타입 트랜지스터이고, 상기 제2 트랜지스터는 피(P)-타입 트랜지스터인 외광감지센서.
- 다수의 액정셀들이 구비된 화소부;상기 화소부의 외연에 형성되는 블랙 매트릭스 영역에 구비되며, 외광의 세기에 대응하여 감지신호를 출력하는 적어도 하나의 외광감지센서;상기 화소부로 광을 공급하는 백라이트; 및상기 감지신호에 대응하여 상기 백라이트에서 생성되는 광의 휘도를 제어하는 백라이트 구동부를 구비하며,상기 외광감지센서는 제1 전원과 상기 제1 전원보다 낮은 전압값을 가지는 제2 전원 사이에 접속되며 제어신호에 대응하여 턴-온되는 제1 트랜지스터와, 상기 제1 트랜지스터와 상기 제2 전원 사이에 접속되며 외광의 세기에 대응하여 상기 제1 트랜지스터로부터 상기 제2 전원으로 흐르는 전류량을 제어하는 제2 트랜지스터를 포함하며, 상기 제2 트랜지스터의 게이트 전극은 상기 제2 전원에 전기적으로 접속되어 역방향 다이오드 연결되는 것을 특징으로 하는 액정표시장치.
- 제5 항에 있어서,상기 제2 트랜지스터의 채널폭은 1000㎛ 내지 56000㎛로 설정되는 것을 특징으로 하는 액정표시장치.
- 제5 항에 있어서,상기 제2 트랜지스터의 게이트 전극은 상기 블랙 매트릭스의 개구부에 위치되는 액정표시장치.
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KR1020060034697A KR100776501B1 (ko) | 2006-04-17 | 2006-04-17 | 외광감지센서 및 이를 이용한 액정표시장치 |
Applications Claiming Priority (1)
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KR1020060034697A KR100776501B1 (ko) | 2006-04-17 | 2006-04-17 | 외광감지센서 및 이를 이용한 액정표시장치 |
Publications (2)
Publication Number | Publication Date |
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KR20070102892A KR20070102892A (ko) | 2007-10-22 |
KR100776501B1 true KR100776501B1 (ko) | 2007-11-16 |
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KR1020060034697A KR100776501B1 (ko) | 2006-04-17 | 2006-04-17 | 외광감지센서 및 이를 이용한 액정표시장치 |
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Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107195282B (zh) * | 2017-07-17 | 2018-02-16 | 深圳市华星光电半导体显示技术有限公司 | 放电信号触发电路及显示装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002023658A (ja) * | 2000-07-05 | 2002-01-23 | Casio Comput Co Ltd | 調光システム |
KR20050046458A (ko) * | 2003-11-14 | 2005-05-18 | 엘지.필립스 엘시디 주식회사 | 액정표시소자 및 그 구동방법 |
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- 2006-04-17 KR KR1020060034697A patent/KR100776501B1/ko active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002023658A (ja) * | 2000-07-05 | 2002-01-23 | Casio Comput Co Ltd | 調光システム |
KR20050046458A (ko) * | 2003-11-14 | 2005-05-18 | 엘지.필립스 엘시디 주식회사 | 액정표시소자 및 그 구동방법 |
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KR20070102892A (ko) | 2007-10-22 |
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