JP2009109288A - 光検出回路 - Google Patents
光検出回路 Download PDFInfo
- Publication number
- JP2009109288A JP2009109288A JP2007280616A JP2007280616A JP2009109288A JP 2009109288 A JP2009109288 A JP 2009109288A JP 2007280616 A JP2007280616 A JP 2007280616A JP 2007280616 A JP2007280616 A JP 2007280616A JP 2009109288 A JP2009109288 A JP 2009109288A
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- JP
- Japan
- Prior art keywords
- light
- photosensors
- photosensor
- shielded
- illuminance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000003287 optical effect Effects 0.000 claims description 43
- 239000006185 dispersion Substances 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 14
- 239000003990 capacitor Substances 0.000 description 10
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G01J1/4228—Photometry, e.g. photographic exposure meter using electric radiation detectors arrangements with two or more detectors, e.g. for sensitivity compensation
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Light Receiving Elements (AREA)
- Liquid Crystal (AREA)
Abstract
【解決手段】2つの外光照度を検出する光センサ20a,20dと2つの遮光された光センサ20b,20cとを縦横互い違いに配置し、光センサ20a,20dの出力と光センサ20b,20cの出力との差分を取る。これにより、素子毎のバラツキや温度分布による熱電流の違いを補正して外光照度の検出を行うことができる。
【選択図】図1
Description
センサ電流b=熱電流b
センサ電流c=熱電流c
センサ電流d=熱電流d+光電流d
行あるいは列ごとに素子の特性がバラつき、縦方向あるいは横方向に隣接する光センサに流れる熱電流が異なる場合でも、光センサ20a,20dと遮光された光センサ20b,20cが縦横互い違いに配置されていることから、熱電流a+熱電流d−(熱電流b+熱電流c)=0が成り立つので、センサ電流a,dとセンサ電流b,cの差分を取ることで安定して光電流a,dを検出することが可能である。
11…表示領域
12…周辺領域
20…光検出部
20a…光センサ
20a,20b,20c,20d…光センサ
21,24…カソード電極
22…アノード電極
23,25…ゲート電極
26…遮光層
27,28…多結晶半導体層
31,32…スイッチング素子
33,34…キャパシタ素子
35,36…スイッチング素子
37…差動アンプ
61,62…光センサ
Claims (2)
- 外光を入射する並列に接続された第1、第2の光センサと、
前記外光を遮光する遮光部が設けられ並列に接続された第3、第4の光センサと、
前記第1、第2の光センサの出力と前記第3、第4の光センサの出力との差分を取る差分回路と、を備え、
前記第1の光センサの横方向に前記第3の光センサが配置され、前記第1の光センサの縦方向に前記第4の光センサが配置されており、前記第2の光センサは前記第3の光センサの縦方向であって前記第4の光センサの横方向に配置されることを特徴とする光検出回路。 - 前記第1、第2の光センサと前記第3、第4の光センサとは縦横互い違いの市松模様状に配置されることを特徴とする請求項1記載の光検出回路。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007280616A JP2009109288A (ja) | 2007-10-29 | 2007-10-29 | 光検出回路 |
TW097136351A TWI395179B (zh) | 2007-10-29 | 2008-09-22 | 光偵測器電路 |
US12/257,749 US8076631B2 (en) | 2007-10-29 | 2008-10-24 | Photodetector circuit |
KR1020080105819A KR20090043457A (ko) | 2007-10-29 | 2008-10-28 | 광검출기 회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007280616A JP2009109288A (ja) | 2007-10-29 | 2007-10-29 | 光検出回路 |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2009109288A true JP2009109288A (ja) | 2009-05-21 |
Family
ID=40581621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007280616A Pending JP2009109288A (ja) | 2007-10-29 | 2007-10-29 | 光検出回路 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8076631B2 (ja) |
JP (1) | JP2009109288A (ja) |
KR (1) | KR20090043457A (ja) |
TW (1) | TWI395179B (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2001016C2 (nl) * | 2007-11-20 | 2009-05-25 | Datascan Group B V | Inrichting en werkwijze voor het detecteren van kleine hoeveelheden licht, omvattende een in halfgeleidertechniek uitgevoerde elektronische beeldopnemer. |
WO2011121687A1 (ja) * | 2010-03-29 | 2011-10-06 | シャープ株式会社 | 表示装置、液晶モジュール及び画像表示システム |
US8872093B2 (en) | 2012-04-18 | 2014-10-28 | Apple Inc. | Calibrated image-sensor-based ambient light sensor |
KR101483556B1 (ko) * | 2013-01-24 | 2015-01-19 | 클레어픽셀 주식회사 | 복수개의 수광 소자를 가지는 조도 센서 장치 |
TWI764351B (zh) * | 2020-11-02 | 2022-05-11 | 丁后君 | 熱感測器 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006118965A (ja) * | 2004-10-21 | 2006-05-11 | Seiko Epson Corp | 光検出回路、電気光学装置、および電子機器 |
JP2007114315A (ja) * | 2005-10-18 | 2007-05-10 | Toshiba Matsushita Display Technology Co Ltd | 表示装置 |
JP2007163628A (ja) * | 2005-12-12 | 2007-06-28 | Epson Imaging Devices Corp | 表示装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7855708B2 (en) * | 2001-09-05 | 2010-12-21 | Honeywell International Inc. | LED backlight luminance sensing for LCDs |
JP4254314B2 (ja) * | 2003-04-09 | 2009-04-15 | ソニー株式会社 | 固体撮像素子およびその駆動方法並びにカメラシステム |
KR100923025B1 (ko) * | 2003-10-23 | 2009-10-22 | 삼성전자주식회사 | 광감지 소자와, 이를 갖는 어레이 기판 및 액정 표시 장치 |
US7675501B2 (en) * | 2003-12-17 | 2010-03-09 | Samsung Electronics Co., Ltd. | Liquid crystal display apparatus with light sensor |
JP2007065004A (ja) | 2005-08-29 | 2007-03-15 | Sanyo Epson Imaging Devices Corp | 照度検出方法、輝度制御方法、電気光学装置及び電子機器 |
JP2007065243A (ja) | 2005-08-31 | 2007-03-15 | Sanyo Epson Imaging Devices Corp | 表示装置 |
JP4487944B2 (ja) * | 2006-02-09 | 2010-06-23 | ソニー株式会社 | 固体撮像装置 |
JP4353224B2 (ja) * | 2006-09-25 | 2009-10-28 | エプソンイメージングデバイス株式会社 | 光検出装置、電気光学装置、および電子機器 |
-
2007
- 2007-10-29 JP JP2007280616A patent/JP2009109288A/ja active Pending
-
2008
- 2008-09-22 TW TW097136351A patent/TWI395179B/zh active
- 2008-10-24 US US12/257,749 patent/US8076631B2/en not_active Expired - Fee Related
- 2008-10-28 KR KR1020080105819A patent/KR20090043457A/ko not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006118965A (ja) * | 2004-10-21 | 2006-05-11 | Seiko Epson Corp | 光検出回路、電気光学装置、および電子機器 |
JP2007114315A (ja) * | 2005-10-18 | 2007-05-10 | Toshiba Matsushita Display Technology Co Ltd | 表示装置 |
JP2007163628A (ja) * | 2005-12-12 | 2007-06-28 | Epson Imaging Devices Corp | 表示装置 |
Also Published As
Publication number | Publication date |
---|---|
US8076631B2 (en) | 2011-12-13 |
KR20090043457A (ko) | 2009-05-06 |
TWI395179B (zh) | 2013-05-01 |
TW200929133A (en) | 2009-07-01 |
US20090108179A1 (en) | 2009-04-30 |
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