JP4953228B2 - 液晶表示装置の駆動回路及び駆動方法 - Google Patents
液晶表示装置の駆動回路及び駆動方法 Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 title claims description 41
- 238000000034 method Methods 0.000 title claims description 8
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- 230000003139 buffering effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 2
- 210000002858 crystal cell Anatomy 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
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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
- 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
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data 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
- 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
-
- 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
- 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
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0248—Precharge or discharge of column electrodes before or after applying exact column voltages
-
- 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
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
-
- 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
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0291—Details of output amplifiers or buffers arranged for use in a driving circuit
-
- 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
- G09G2320/0252—Improving the response speed
-
- 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
- G09G3/3614—Control of polarity reversal in general
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Description
図5は、本発明に係る液晶表示装置の駆動回路に対する一実施形態の回路図である。同図に示した液晶表示装置の駆動回路を用いることによって、プリエンファシス電圧が加えられた状態で、増幅された映像信号電圧を出力することができる。
図11に示した本実施形態の液晶表示装置の駆動回路200は、信号電圧を
バッファリングして伝送ラインに載せるための単一ゲイン演算増幅器210と、該単一ゲイン演算増幅器210の入力端子(非反転入力端子)と、前記入力信号電圧端子Vinの接続をスイッチングする第1スイッチSW11と、一方が前記入力信号電圧端子Vinに接続される第2スイッチSW12と、一方が前記単一ゲイン演算増幅器210の入力端子に接続される第3スイッチSW13と、一方が前記第3スイッチSW13の他方に接続され、他方が前記第2スイッチSW12の他方に接続される第1キャパシタC11と、一方が第1キャパシタC11の他方に接続され、他方が接地電圧端に接続される第2キャパシタC12と、前記第1キャパシタC11及び前記第2スイッチSW12の接続地点と前記第1スイッチSW11の一方に位置し、前記第1キャパシタC11及び第2キャパシタC12の接続をスイッチングするための第4スイッチSW14とを備える。
Claims (6)
- 入力映像信号電圧をバッファリングして伝送ラインに載せるための単一ゲイン演算増幅器と、
前記単一ゲイン演算増幅器の非反転端子と前記入力映像信号電圧の端子との接続をスイッチングする第1スイッチと、
一方が前記入力映像信号電圧の端子に接続された第2スイッチと、
一方が前記単一ゲイン演算増幅器の非反転端子に接続された第3スイッチと、
一方が前記第3スイッチの他方に接続され、他方が前記第2スイッチの他方に接続された第1キャパシタと、
一方が第1キャパシタの他方に接続され、他方が接地電圧端に接続された第2キャパシタと、
を備えたことを特徴とする液晶表示装置の駆動回路。 - 前記単一ゲイン演算増幅器が動作しない時、該単一ゲイン演算増幅器と伝送ラインとの接続をターンオフするための節電スイッチをさらに備えたことを特徴とする請求項1に記載の液晶表示装置の駆動回路。
- 前記第1スイッチ及び前記第3スイッチをターンオンさせ、前記第2スイッチをターンオフさせ、前記入力映像信号電圧を、プリエンファシス電圧として直列に接続された前記第1、第2キャパシタに充電するステップと、
前記第1スイッチをターンオフさせ、前記第2スイッチ及び前記第3スイッチをターンオンさせ、前記プリエンファシス電圧が加えられた前記入力映像信号電圧を前記単一ゲイン演算増幅器が増幅出力して、前記伝送ラインに載せるステップと、
前記第1スイッチ及び前記第2スイッチをターンオンさせ、前記第3スイッチをターンオフさせ、前記単一ゲイン演算増幅器が前記プリエンファシス電圧を除去し前記入力映像信号電圧だけを受信して、前記伝送ラインに出力するステップと、
前記第1スイッチないし前記第3スイッチをターンオンさせ、前記第1キャパシタを短絡して完全に放電するステップと、
を行うスイッチ制御部をさらに備えたことを特徴とする請求項1に記載の液晶表示装置の駆動回路。 - 前記第1キャパシタ及び前記第2スイッチの接続地点と前記第2キャパシタの一方に接続された第4スイッチをさらに備えた請求項1ないし3のいずれかに記載の液晶表示装置の駆動回路。
- 受信した入力映像信号電圧を、駆動バッファ及び前記キャパシタを用いてバッファリングして、伝送ラインを介してディスプレイパネルに出力する請求項1ないし3のいずれか1項に記載された液晶表示装置の駆動回路を備えた液晶表示装置の駆動方法において、
前記駆動バッファが前記入力映像信号電圧を出力する時、前記入力映像信号電圧をプリエンファシス電圧として前記第1、第2キャパシタに格納するステップ(S210)と、
前記第1キャパシタに格納された前記プリエンファシス電圧を前記入力映像信号電圧に加え、前記プリエンファシス電圧が加えられた前記入力映像信号電圧をバッファリングして出力するステップ(S220)と、
前記プリエンファシス電圧が除去された前記入力映像信号電圧だけを増幅させて出力するステップ(S230)と、
前記第1キャパシタに充電された電荷を除去するステップ(S240)と
を備えたことを特徴とする液晶表示装置の駆動方法。 - 前記ステップ(S210)は、スキャン期間の開始を知らせる信号が活性化された後から、前記第1、第2キャパシタに、前記プリエンファシス電圧のための電荷が集まるのに充分な時間の間に行われ、
前記ステップ(S240)は、前記プリエンファシス電圧が加えられた前記入力映像信号電圧をディスプレイパネルに表示するのに充分な時間が経過したスキャン期間の完了直前から、次のスキャンラインに対するステップ(S120)が始まる前まで行われることを特徴とする請求項5に記載の液晶表示装置の駆動方法。
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KR1020050034619A KR100670494B1 (ko) | 2005-04-26 | 2005-04-26 | 액정표시장치의 구동회로 및 구동방법 |
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JP4798753B2 (ja) * | 2005-02-28 | 2011-10-19 | ルネサスエレクトロニクス株式会社 | 表示制御回路および表示制御方法 |
TWI381343B (zh) * | 2007-03-23 | 2013-01-01 | Himax Tech Ltd | 顯示裝置及其閘極驅動器 |
KR101409514B1 (ko) * | 2007-06-05 | 2014-06-19 | 엘지디스플레이 주식회사 | 액정표시장치와 그의 구동방법 |
JP4960943B2 (ja) * | 2007-10-10 | 2012-06-27 | アナパス・インコーポレーテッド | 信号の歪曲及び/又は電力消耗を減少させることができるディスプレイ駆動装置及びこれを含むディスプレイ装置 |
KR101416904B1 (ko) * | 2007-11-07 | 2014-07-09 | 엘지디스플레이 주식회사 | 유기전계발광 표시장치의 화소 구동 장치 |
KR20100123138A (ko) * | 2009-05-14 | 2010-11-24 | 삼성전자주식회사 | 디스플레이 장치 |
US8963904B2 (en) * | 2010-03-22 | 2015-02-24 | Apple Inc. | Clock feedthrough and crosstalk reduction method |
JP5496940B2 (ja) * | 2010-08-11 | 2014-05-21 | アンリツ株式会社 | エンファシス付加装置及びエンファシス付加方法 |
TWI400464B (zh) * | 2011-02-11 | 2013-07-01 | Etron Technology Inc | 具有外部測試電壓的電路 |
KR20120094722A (ko) * | 2011-02-17 | 2012-08-27 | 삼성디스플레이 주식회사 | 화상 표시장치 및 그의 구동방법 |
KR102221788B1 (ko) | 2014-07-14 | 2021-03-02 | 삼성전자주식회사 | 고속으로 동작하는 디스플레이 구동 장치 및 그의 제어 방법 |
CN107749273B (zh) | 2017-11-07 | 2019-10-15 | 京东方科技集团股份有限公司 | 电信号检测模组、驱动方法、像素电路和显示装置 |
US11250780B2 (en) | 2019-08-15 | 2022-02-15 | Samsung Display Co., Ltd. | Estimation of pixel compensation coefficients by adaptation |
US11087656B2 (en) | 2019-08-15 | 2021-08-10 | Samsung Display Co., Ltd. | Fully differential front end for sensing |
US11069282B2 (en) | 2019-08-15 | 2021-07-20 | Samsung Display Co., Ltd. | Correlated double sampling pixel sensing front end |
US11081064B1 (en) | 2020-01-13 | 2021-08-03 | Samsung Display Co., Ltd. | Reference signal generation by reusing the driver circuit |
US11257416B2 (en) | 2020-02-14 | 2022-02-22 | Samsung Display Co., Ltd. | Voltage mode pre-emphasis with floating phase |
US11719738B2 (en) | 2020-10-15 | 2023-08-08 | Samsung Display Co., Ltd. | Two-domain two-stage sensing front-end circuits and systems |
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JP2969699B2 (ja) * | 1989-11-28 | 1999-11-02 | ソニー株式会社 | 液晶ディスプレイ装置 |
JPH05297830A (ja) * | 1992-04-20 | 1993-11-12 | Fujitsu Ltd | アクティブマトリックス液晶駆動方法及び回路 |
KR100692289B1 (ko) * | 2000-02-10 | 2007-03-09 | 가부시키가이샤 히타치세이사쿠쇼 | 화상표시장치 |
US6724251B1 (en) * | 2002-09-12 | 2004-04-20 | National Semiconductor Corp. | Apparatus and method for employing gain dependent biasing to reduce offset and noise in a current conveyor type amplifier |
KR100522855B1 (ko) * | 2002-12-03 | 2005-10-24 | 학교법인 한양학원 | 대면적 고해상도 액정표시장치의 구동방법 및 구동회로 |
JP2005070627A (ja) | 2003-08-27 | 2005-03-17 | Nec Kansai Ltd | 液晶駆動装置およびその制御方法 |
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