JP4198027B2 - 液晶表示装置の駆動方法 - Google Patents
液晶表示装置の駆動方法 Download PDFInfo
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- JP4198027B2 JP4198027B2 JP2003363701A JP2003363701A JP4198027B2 JP 4198027 B2 JP4198027 B2 JP 4198027B2 JP 2003363701 A JP2003363701 A JP 2003363701A JP 2003363701 A JP2003363701 A JP 2003363701A JP 4198027 B2 JP4198027 B2 JP 4198027B2
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- 239000004973 liquid crystal related substance Substances 0.000 title claims description 41
- 238000000034 method Methods 0.000 title claims description 23
- 238000010586 diagram Methods 0.000 description 12
- 230000004044 response Effects 0.000 description 8
- 230000007704 transition Effects 0.000 description 6
- 239000010409 thin film Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 2
- 206010047571 Visual impairment Diseases 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003068 static effect Effects 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
-
- 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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- 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
- G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
-
- 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
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/061—Details of flat display driving waveforms for resetting or blanking
-
- 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
- G09G2320/0261—Improving the quality of display appearance in the context of movement of objects on the screen or movement of the observer relative to the screen
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Description
図1に示すように、従来のAM−LCD駆動方法では、1垂直区間(1V)(60Hz駆動の場合は、1垂直区間が16.7ms)内に垂直開始信号(STV)がイネーブルされた後、垂直クロック信号(CPV)の遷移に同期してゲートパルス電圧すなわち、ゲートハイパルス電圧(Gate high pulse voltage)(Vgh)及びゲートローパルス電圧(Gate low pulse voltage)(Vgl)を発生して複数のゲートラインを順次にスキャニングする。ここで、V_synは垂直同期信号を、G1〜G768は第1ゲートラインから第768ゲートラインまで順次に印加されるゲート駆動信号を示す。
さらに、充電に必要な電荷量が減って消費電流が減少する効果があって、少ない電荷量によりTFTゲートラインとデータラインのオーバーラッピング(Over lapping)で作られるゲート−ソース間のキャパシタンスを減らすことができてカップリングによるディスプレー特性の劣化を防止できる。
図3は本発明による液晶表示装置の駆動方法を説明するための図である。同図は本発明の理解を容易にするために1ピクセルのみを図示したものである。
図3に示すように、本発明の液晶表示装置(以下、AM−LCDと呼ぶ)はゲートパルス電圧を印加するためのゲートライン10と、画素電圧を印加するためにゲートライン10に交差するデータライン20と、ゲートライン10とデータライン20の交差領域にマトリックス形態で配列された薄膜トランジスタ(TFT)を含んで構成される。AM−LCDを駆動するためにゲート入力として第1、第2及び第3レベル(Vgh、Vgl、Vgl’)を有するゲートパルス電圧を発生し、データ入力としてデータ電圧をデータライン20に印加する。
本発明の駆動方法は1垂直区間(1V)(60Hz駆動である場合16.7ms)内に垂直開始信号(STV)がイネーブルされた後に垂直クロック信号(CPV)の遷移に同期して第1、第2及び第3レベル(Vgl、Vgh、Vgl’)を有するゲートパルス電圧を発生して複数のゲートラインを順次にスキャニングする。ここで、V_synは垂直同期信号を、G1〜G768は第1ゲートラインから第768ゲートラインまで順次に印加されるゲート駆動信号を示す。
図5に示すように、データ電圧の極性が変化する時、第1レベルのゲートパルス電圧(Vgh)の入力後2n*1H時間以後に第2レベルのゲートパルス電圧(Vgl)が第3レベルのゲートパルス電圧(Vgl’)に変わることにより、ゲートパルス電圧が効果的に共通電圧(Vcom)に収斂できるので、第3レベルのゲートパルス電圧(Vgl’)の適用タイミングはt1=1V−1H−tO=2n*1H、nは正の整数のように限定することが望ましい。すなわち、ゲートパルス電圧のホールディング区間は2Hを維持することが望ましい。
20 データライン
Vgh、Vgl、Vgl’ 第1、第2及び第3レベルのゲートパルス
Claims (3)
- 1垂直区間内でゲートラインを順次走査する液晶表示装置の駆動方法において、
前記1垂直区間内に垂直クロック信号に同期して第1ないし第3レベルを有する複数のゲートパルス電圧を順次に発生する段階と、
反転駆動時に各極性区間で前記複数のゲートパルス電圧の発生区間を前記複数のゲートパルス電圧の第1ないし第3レベルに対応して充電区間、ホールディング区間及び放電区間に分割する段階と、
前記放電区間のピクセル電圧を共通電圧レベルに收斂させる段階を具備し、前記第3レベルは前記第1レベルと前記第2レベルの範囲内に存在することを特徴とする液晶表示装置の駆動方法。 - 前記第3レベルの液晶上昇時間は前記第3レベルの液晶下降時間より小さな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方法。
- 前記ホールディング区間は2水平区間以上で設定される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方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020020088266A KR100857378B1 (ko) | 2002-12-31 | 2002-12-31 | 게이트 펄스의 구동방법 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004212947A JP2004212947A (ja) | 2004-07-29 |
JP4198027B2 true JP4198027B2 (ja) | 2008-12-17 |
Family
ID=32653269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003363701A Expired - Lifetime JP4198027B2 (ja) | 2002-12-31 | 2003-10-23 | 液晶表示装置の駆動方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7164406B2 (ja) |
JP (1) | JP4198027B2 (ja) |
KR (1) | KR100857378B1 (ja) |
CN (1) | CN1332257C (ja) |
TW (1) | TWI247264B (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7432895B2 (en) * | 2003-10-02 | 2008-10-07 | Industrial Technology Research Institute | Drive for active matrix cholesteric liquid crystal display |
KR101249775B1 (ko) * | 2006-06-14 | 2013-04-01 | 엘지디스플레이 주식회사 | 액정표시장치의 게이트 구동방법 |
KR101265333B1 (ko) * | 2006-07-26 | 2013-05-20 | 엘지디스플레이 주식회사 | 액정표시장치 및 그의 구동 방법 |
TWI336461B (en) * | 2007-03-15 | 2011-01-21 | Au Optronics Corp | Liquid crystal display and pulse adjustment circuit thereof |
CN100460939C (zh) * | 2007-04-11 | 2009-02-11 | 友达光电股份有限公司 | 液晶显示器及其脉波调整电路 |
KR101832409B1 (ko) | 2011-05-17 | 2018-02-27 | 삼성디스플레이 주식회사 | 게이트 구동부 및 이를 포함하는 액정 표시 장치 |
CN111883083B (zh) * | 2020-07-30 | 2021-11-09 | 惠科股份有限公司 | 一种栅极驱动电路和显示装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2626451B2 (ja) * | 1993-03-23 | 1997-07-02 | 日本電気株式会社 | 液晶表示装置の駆動方法 |
JP3037886B2 (ja) * | 1995-12-18 | 2000-05-08 | インターナショナル・ビジネス・マシーンズ・コーポレイション | 液晶表示装置の駆動方法 |
KR100219116B1 (ko) * | 1996-03-30 | 1999-09-01 | 구자홍 | 티에프티 엘시디 디스플레이의 구동방법 |
JPH10293287A (ja) | 1997-02-24 | 1998-11-04 | Toshiba Corp | 液晶表示装置の駆動方法 |
JPH10253942A (ja) * | 1997-03-13 | 1998-09-25 | Advanced Display:Kk | 液晶表示装置およびその駆動方法 |
JPH11344959A (ja) | 1998-06-03 | 1999-12-14 | Matsushita Electric Ind Co Ltd | 液晶パネルの駆動方法 |
EP1237139B1 (en) * | 2000-04-24 | 2017-10-04 | Panasonic Corporation | Display unit and drive method therefor |
KR100623990B1 (ko) * | 2000-07-27 | 2006-09-13 | 삼성전자주식회사 | 액정 표시 장치 및 이의 구동 방법 |
KR100389027B1 (ko) * | 2001-05-22 | 2003-06-25 | 엘지.필립스 엘시디 주식회사 | 액정표시장치 및 그 구동방법 |
-
2002
- 2002-12-31 KR KR1020020088266A patent/KR100857378B1/ko active IP Right Grant
-
2003
- 2003-09-05 TW TW092124526A patent/TWI247264B/zh not_active IP Right Cessation
- 2003-09-05 US US10/656,575 patent/US7164406B2/en active Active
- 2003-10-13 CN CNB2003101012370A patent/CN1332257C/zh not_active Expired - Lifetime
- 2003-10-23 JP JP2003363701A patent/JP4198027B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
TWI247264B (en) | 2006-01-11 |
KR20040061957A (ko) | 2004-07-07 |
JP2004212947A (ja) | 2004-07-29 |
CN1514293A (zh) | 2004-07-21 |
US20040125059A1 (en) | 2004-07-01 |
US7164406B2 (en) | 2007-01-16 |
CN1332257C (zh) | 2007-08-15 |
TW200411619A (en) | 2004-07-01 |
KR100857378B1 (ko) | 2008-09-05 |
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