JP4346636B2 - 液晶表示装置 - Google Patents
液晶表示装置 Download PDFInfo
- Publication number
- JP4346636B2 JP4346636B2 JP2006309872A JP2006309872A JP4346636B2 JP 4346636 B2 JP4346636 B2 JP 4346636B2 JP 2006309872 A JP2006309872 A JP 2006309872A JP 2006309872 A JP2006309872 A JP 2006309872A JP 4346636 B2 JP4346636 B2 JP 4346636B2
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- JP
- Japan
- Prior art keywords
- voltage
- scanning line
- capacitor
- circuit
- liquid crystal
- 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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- 239000004973 liquid crystal related substance Substances 0.000 title claims description 31
- 239000003990 capacitor Substances 0.000 claims description 37
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 description 9
- 239000002131 composite material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000000126 substance 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
- 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
- G09G3/36—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 using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0219—Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Description
101 基板
102 データ線
103 走査線
104 TFT
105 画素電極
106 データ線駆動回路(ゲート線ドライバ)
107 走査線駆動回路(走査線ドライバ)
108 画像データ回路
109 時分割タイミング制御回路
110 ゲート変調回路
GOE ゲートアウトプットイネーブル信号
VREF 基準電圧
VDD デジタル電源
VGH 走査線ドライバのハイレベル電源
VGH modulation ゲート変調回路の出力
Q1A 複合型NPNトランジスタ
Q1B 複合型PNPトランジスタ
IC1A 複合型コンパレータA
IC1B 複合型コンパレータB
C1〜C5 コンデンサ
R1〜R9 抵抗
D1 ショットキーダイオード
Q1A,Q1B,Q2,Q3 トランジスタ
Claims (1)
- 平行に走る複数のデータ線と、前記複数のデータ線と直交し平行に走る複数の走査線と、前記複数のデータ線と前記複数の走査線の交差する各位置に設けられた画素と、前記複数の画素に対応して設けられた複数のTFTと、前記データ線を介して画素信号を供給するデータ線駆動回路と、複数の走査線信号に基づいて前記TFTを制御し、且つハイレベル電源電圧を備える走査線駆動回路と、ゲート変調回路と、を有する液晶表示装置であって、
前記ゲート変調回路は、基準電圧と、定電流を生成する定電流回路部と、一方の端子が前記定電流回路部に接続されるとともに、他方の端子が接地される第1のコンデンサと、前記第1のコンデンサの充電電圧を、走査線信号の立上りと立下りを制御する走査線タイミング信号に同期して放電させ、三角波電圧を生成する電圧発生回路と、一方の端子が走査線駆動回路のハイレベル電源電圧に接続され、他方の端子が接地される第2のコンデンサと、放電回路とを備え、
前記放電回路は、前記ハイレベル電源電圧と前記第2コンデンサとの間に接続されるスイッチング素子と、
前記三角波電圧と前記基準電圧とを比較し、前記三角波電圧が前記基準電圧よりも低い場合に、前記スイッチング素子を導通させるように制御することで、前記ハイレベル電源電圧を前記第2のコンデンサに供給する第1のコンパレータと、
前記三角波電圧と前記基準電圧とを比較し、前記三角波電圧が前記基準電圧よりも高い場合に、前記第2のコンデンサを放電する制御を行う第2のコンパレータを含み、
前記ゲート変調回路は、前記第2のコンデンサの電圧を前記走査線駆動回路に出力することにより、前記走査線信号をランプ波形に変調することを特徴とする液晶表示装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006309872A JP4346636B2 (ja) | 2006-11-16 | 2006-11-16 | 液晶表示装置 |
TW096116084A TWI368885B (en) | 2006-11-16 | 2007-05-07 | Liquid crystal display and gate modulation method and circuit thereof |
CNB2007101101438A CN100520545C (zh) | 2006-11-16 | 2007-06-18 | 液晶显示装置及其栅极信号调变方法、栅极信号调变电路 |
US11/939,591 US8004485B2 (en) | 2006-11-16 | 2007-11-14 | Liquid crystal display and gate modulation method thereof |
US13/085,190 US8558823B2 (en) | 2006-11-16 | 2011-04-12 | Liquid crystal display and gate modulation method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006309872A JP4346636B2 (ja) | 2006-11-16 | 2006-11-16 | 液晶表示装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008129026A JP2008129026A (ja) | 2008-06-05 |
JP4346636B2 true JP4346636B2 (ja) | 2009-10-21 |
Family
ID=38880296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006309872A Active JP4346636B2 (ja) | 2006-11-16 | 2006-11-16 | 液晶表示装置 |
Country Status (4)
Country | Link |
---|---|
US (2) | US8004485B2 (ja) |
JP (1) | JP4346636B2 (ja) |
CN (1) | CN100520545C (ja) |
TW (1) | TWI368885B (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7306624B2 (ja) | 2019-06-19 | 2023-07-11 | 日本製鉄株式会社 | 鋼板 |
Families Citing this family (24)
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JP4346636B2 (ja) * | 2006-11-16 | 2009-10-21 | 友達光電股▲ふん▼有限公司 | 液晶表示装置 |
TWI408655B (zh) * | 2008-12-29 | 2013-09-11 | Innolux Corp | 影像顯示系統與顯示面板及其閘極線電路 |
CN101587700B (zh) * | 2009-06-26 | 2011-11-09 | 友达光电股份有限公司 | 液晶显示器及驱动液晶显示器的方法 |
TWI416492B (zh) * | 2009-11-25 | 2013-11-21 | Innolux Corp | 驅動系統、顯示裝置及驅動方法 |
CN102129845B (zh) * | 2010-01-14 | 2012-12-26 | 群康科技(深圳)有限公司 | 液晶面板驱动电路和液晶显示装置 |
CN102237050B (zh) * | 2010-04-27 | 2013-07-31 | 北京京东方光电科技有限公司 | 栅极驱动电路、栅极电压调节方法以及液晶显示器 |
TWI434254B (zh) | 2010-06-23 | 2014-04-11 | Au Optronics Corp | 閘極脈衝調變電路及其削角調變方法 |
TWI411993B (zh) * | 2010-12-29 | 2013-10-11 | Au Optronics Corp | 平面顯示裝置 |
TWI440011B (zh) | 2011-10-05 | 2014-06-01 | Au Optronics Corp | 具適應性脈波削角控制機制之液晶顯示裝置 |
CN102522070B (zh) * | 2011-12-24 | 2013-10-16 | 西安启芯微电子有限公司 | 消除薄膜场效应晶体管闪烁和关机残影现象的控制电路 |
US9595232B2 (en) * | 2012-04-13 | 2017-03-14 | Sharp Kabushiki Kaisha | Liquid crystal display device and driving method thereof |
TWI467557B (zh) | 2012-07-26 | 2015-01-01 | Upi Semiconductor Corp | 電壓補償電路及其操作方法 |
CN103151008B (zh) * | 2013-02-22 | 2015-02-11 | 福建华映显示科技有限公司 | 产生削角讯号的扫描电路、液晶面板及产生削角讯号方法 |
US20140340291A1 (en) * | 2013-05-14 | 2014-11-20 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Chamfered Circuit and Control Method Thereof |
TWI559272B (zh) * | 2013-10-16 | 2016-11-21 | 天鈺科技股份有限公司 | 閘極脈衝調變電路及其削角調變方法 |
TWI529694B (zh) * | 2014-08-19 | 2016-04-11 | 友達光電股份有限公司 | 面板驅動電路、液晶畫素資料的升壓電路及驅動其的方法 |
US9659539B2 (en) * | 2015-04-16 | 2017-05-23 | Novatek Microelectronics Corp. | Gate driver circuit, display apparatus having the same, and gate driving method |
US11657774B2 (en) | 2015-09-16 | 2023-05-23 | E Ink Corporation | Apparatus and methods for driving displays |
EP3350798B1 (en) * | 2015-09-16 | 2023-07-26 | E Ink Corporation | Apparatus and methods for driving displays |
US10803813B2 (en) | 2015-09-16 | 2020-10-13 | E Ink Corporation | Apparatus and methods for driving displays |
US10916212B2 (en) * | 2016-09-06 | 2021-02-09 | Sakai Display Products Corporation | Display device with two gate drive circuits and gate slope forming sections for reducing display uneveness |
JP6963951B2 (ja) * | 2017-09-25 | 2021-11-10 | ローム株式会社 | ゲートドライバ駆動回路および液晶表示装置 |
CN111373468B (zh) * | 2017-11-29 | 2022-10-28 | 平面系统公司 | 用于显示矩阵的主动放电电路系统 |
JP2022115310A (ja) * | 2021-01-28 | 2022-08-09 | セイコーエプソン株式会社 | 集積回路 |
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JP2806098B2 (ja) * | 1991-10-09 | 1998-09-30 | 松下電器産業株式会社 | 表示装置の駆動方法 |
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WO2007052408A1 (ja) * | 2005-11-04 | 2007-05-10 | Sharp Kabushiki Kaisha | 表示装置 |
KR101265333B1 (ko) * | 2006-07-26 | 2013-05-20 | 엘지디스플레이 주식회사 | 액정표시장치 및 그의 구동 방법 |
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JP4346636B2 (ja) * | 2006-11-16 | 2009-10-21 | 友達光電股▲ふん▼有限公司 | 液晶表示装置 |
-
2006
- 2006-11-16 JP JP2006309872A patent/JP4346636B2/ja active Active
-
2007
- 2007-05-07 TW TW096116084A patent/TWI368885B/zh active
- 2007-06-18 CN CNB2007101101438A patent/CN100520545C/zh active Active
- 2007-11-14 US US11/939,591 patent/US8004485B2/en active Active
-
2011
- 2011-04-12 US US13/085,190 patent/US8558823B2/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7306624B2 (ja) | 2019-06-19 | 2023-07-11 | 日本製鉄株式会社 | 鋼板 |
Also Published As
Publication number | Publication date |
---|---|
CN100520545C (zh) | 2009-07-29 |
US8004485B2 (en) | 2011-08-23 |
TWI368885B (en) | 2012-07-21 |
US20080117200A1 (en) | 2008-05-22 |
CN101067703A (zh) | 2007-11-07 |
TW200823845A (en) | 2008-06-01 |
JP2008129026A (ja) | 2008-06-05 |
US8558823B2 (en) | 2013-10-15 |
US20110187690A1 (en) | 2011-08-04 |
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