JP2009128902A - 周囲光センサー機能を備えた液晶ディスプレイ及びその方法 - Google Patents
周囲光センサー機能を備えた液晶ディスプレイ及びその方法 Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims abstract description 72
- 239000010409 thin film Substances 0.000 claims abstract description 65
- 238000012545 processing Methods 0.000 claims abstract description 9
- 230000007423 decrease Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 5
- 230000009466 transformation Effects 0.000 abstract 5
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
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- 230000005611 electricity Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
【解決手段】先ず、コンデンサー500を薄膜トランジスタ400のソース電極に接続する。次にコンデンサー500の電位の電荷が減り、転換するのに要する時間を計算し、転換時間に基づいて周囲光の強度を計算する。本発明は別に一種の周囲光センサー回路を提供しており、それは一薄膜トランジスタ、一コンデンサー及び一読出しスイッチを含む。周囲光が変化した時、薄膜トランジスタ400の漏電流もそれに従って変化し、コンデンサー500の電位転換にかかる転換時間に変化が生じ、読出しスイッチがコンデンサー500の電位をデータ読出し線300に伝送することによって転換時間から周囲光の強度を算出する。本発明の液晶ディスプレイは複数個のコンデンサー、複数個の読出しスイッチ及び一処理モジュールを含みうる。
【選択図】図8
Description
(1) センサー面積を有効に減らす。
(2) 消費電力効率を下げる。
(3) デジタル信号を出力できる。
(4) 生産コストを下げる。
1.現行の製造過程に依る薄膜トランジスタを周囲光センサー器とすることができる。
2.センサー面積を減らすことができる。
3.消耗率を下げることができる。
4.生産コストを下げることができる。
5.デジタル信号出力できる。
100 入力電圧
200 スキャン線
210 第一スキャン線
220 第二スキャン線
300 データ読出し線
400 感光薄膜トランジスタ
500 コンデンサー
600 読出しスイッチ
610 薄膜トランジスタスイッチ
620 信号拡大トランジスタ
700 反転増幅器
710 P型薄膜トランジスタ
720 N型薄膜トランジスタ
810 処理モジュール
820 照明モジュール
830 ピクセル
900 パネル
Claims (14)
- 一薄膜トランジスタに適用する周囲光センサーの方法において、前記方法は
一コンデンサーを前記薄膜トランジスタの源極に接続し、
前記コンデンサーの電荷を前記薄膜トランジスタの漏電流に従って減らし、
前記コンデンサーの電位の電荷が減少することによって発生する転換に要する一転換時間を計算し、かつ
前記転換時間に基づき前記周囲光の強度を計算することを含むことを特徴とする周囲光センサーの方法。 - 前記周囲光センサー方法は、更に一ロジックノットゲートを前記コンデンサーに接続し、前記コンデンサーの電位を一デジタル信号に転換することを含むことを特徴とする請求項1記載の周囲光センサーの方法。
- 前記ロジックノットゲートが一反転増幅器であることを特徴とする請求項2記載の周囲光センサーの方法。
- 前記周囲光センサー方法が、更に一データ読出し線を前記コンデンサーに接続し、前記コンデンサーの電位を出力することを含むことを特徴とする請求項1記載の周囲光センサーの方法。
- 前記周囲光センサー方法が、更に一読出しスイッチを前記コンデンサーと前記データ読出し線の間に接続し、前記コンデンサーの電位を読み取ることを含むことを特徴とする請求項4記載の周囲光センサーの方法。
- 前記薄膜トランジスタが、アモルファスシリコン薄膜トランジスタ、もしくは多結晶薄膜トランジスタとすることを特徴とする請求項1記載の周囲光センサーの方法。
- 一ピクセル構造に適用する一種の周囲光センサー回路において、
漏電流と前記周囲光が正比例する一薄膜トランジスタと、
一端を前記薄膜トランジスタの源極に接続し、別一端はアースとする一コンデンサーと、
前記薄膜トランジスタの源極と一データ読出し線の間に接続する一読出しスイッチを含み、そのうち、
周囲光が変化した時、前記薄膜トランジスタの漏電流もまたその変化に従い、前記コンデンサーの電位転換に要する一転換時間に変化を発生させ、前記読出しスイッチは前記コンデンサーの電位を前記データ読出し線へ伝送することを特徴とする周囲光センサー回路。 - 前記周囲光センサー回路が、一ロジックノットゲートを含み、前記コンデンサーと前記読出しスイッチの間に接続し、前記コンデンサーの電位を一デジタル信号に転換することを特徴とする請求項7記載の周囲光センサー回路。
- 前記ロジックノットゲートが、一反転増幅器とすることを特徴とする請求項8記載の周囲光センサー回路。
- 前記前記薄膜トランジスタが、アモルファスシリコン薄膜トランジスタ、もしくは多結晶薄膜トランジスタとすることを特徴とする請求項7記載の周囲光センサー回路。
- 一周囲光に従って一照明モジュールの輝度を調整する一種液晶ディスプレイにおいて、
前記液晶ディスプレイの複数個のピクセルに接続する複数のコンデンサーと、
前記複数のコンデンサーと一データ読出し線の間に接続してこれらコンデンサーの電位を読み取る複数個読出しスイッチと、
前記複数のコンデンサーの電位転換に要する時間に基づき、前記周囲光の強度を計算し、前記照明モジュールの輝度を調整する一処理モジュールを含むことを特徴とする液晶ディスプレイ。 - 前記液晶ディスプレイが、更に複数のロジックノットゲートを含み、前記複数のコンデンサーとこれら読出しスイッチの間に接続して前記複数のコンデンサーの電位を一デジタル信号に転換することを特徴とする請求項11記載の液晶ディスプレイ。
- 前記ロジックノットゲートが一反転増幅器であることを特徴とする請求項12記載の液晶ディスプレイ。
- 前記照明モジュールが、一バックライトモジュールであることを特徴とする請求項11記載の液晶ディスプレイ。
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TW096145046A TWI358570B (en) | 2007-11-27 | 2007-11-27 | Lcd with ambient light sense function and method t |
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CN111179870A (zh) * | 2020-01-31 | 2020-05-19 | 北京京东方显示技术有限公司 | 一种电源驱动电路、其驱动方法及显示装置 |
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CN101609855B (zh) * | 2008-06-20 | 2013-09-18 | 群康科技(深圳)有限公司 | 光敏电容、光感测电路、基板及其制造工艺和显示装置 |
TWI428906B (zh) | 2009-09-30 | 2014-03-01 | Toshiba Global Commerce Solutions Holdings Corp | 自動調整光學觸摸面板裝置之亮度的方法及其裝置 |
US8626236B2 (en) | 2010-10-08 | 2014-01-07 | Blackberry Limited | System and method for displaying text in augmented reality |
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US20090135333A1 (en) | 2009-05-28 |
KR20090054879A (ko) | 2009-06-01 |
TW200923476A (en) | 2009-06-01 |
TWI358570B (en) | 2012-02-21 |
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