CN1804985A - 液晶显示装置的源极驱动器驱动方法 - Google Patents

液晶显示装置的源极驱动器驱动方法 Download PDF

Info

Publication number
CN1804985A
CN1804985A CNA2005101248594A CN200510124859A CN1804985A CN 1804985 A CN1804985 A CN 1804985A CN A2005101248594 A CNA2005101248594 A CN A2005101248594A CN 200510124859 A CN200510124859 A CN 200510124859A CN 1804985 A CN1804985 A CN 1804985A
Authority
CN
China
Prior art keywords
level
source electrode
video data
electrode driver
gamma reference
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.)
Pending
Application number
CNA2005101248594A
Other languages
English (en)
Inventor
金亨奎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydis Technologies Co Ltd
Original Assignee
Hydis Technologies Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hydis Technologies Co Ltd filed Critical Hydis Technologies Co Ltd
Publication of CN1804985A publication Critical patent/CN1804985A/zh
Pending legal-status Critical Current

Links

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
    • G09G3/3685—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
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/023—Power management, e.g. power saving using energy recovery or conservation
    • 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
    • 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
    • G09G3/3696—Generation of voltages supplied to electrode drivers

Abstract

本发明提供一种通过减少源极驱动器的最后级所具有的放大器的驱动区域，从而可以减少液晶显示装置的消耗功率的液晶显示装置的源极驱动器驱动方法。本发明在源极驱动器的待机状态下，将所述源极驱动器的输出级与所述多个伽马基准电压中、具有任意的电平的伽马基准电压连接，使所述输出级具有一定的电平。在所述待机状态下，在下一帧的显示数据具有正区域的电压电平的情况下，将所述源极驱动器的输出级与具有正区域的中间电平的所述基准电压连接，在所述待机状态下，下一帧的显示数据具有负区域的电压电平的情况下，将所述源极驱动器的输出级与具有负区域的中间电平的所述伽马基准电压连接。

Description

液晶显示装置的源极驱动器驱动方法
技术领域
本发明涉及液晶显示装置的源极驱动器驱动方法，更详细地说，涉及通过减少源极驱动器的最后级所具有的放大器的驱动区域，从而可以减少液晶显示装置的消耗功率的液晶显示装置的源极驱动器驱动方法。
背景技术
一般地，液晶显示装置在由源极驱动器驱动的多个数据线和由栅极驱动器驱动的多个扫描线之间以矩阵结构分别配置像素而构成一个液晶面板。
这样的液晶显示装置在栅极驱动器动作而所述扫描线为有效(active)状态期间，通过数据线将根据显示数据的电荷对各个像素上的液晶单元进行充电而使各个像素发光。
与此相关联，现有的源极驱动器接收从定时控制装置提供的RGB数据并存储为显示数据，然后，使用根据灰度级别的伽马基准电压(GMA)对各个显示数据赋予电压值。这样，由源极驱动器生成的显示数据根据输入源极驱动器的极性信号(POL)，对于每一帧以相反极性施加到液晶单元。
如前所述，现有的源极驱动器在对液晶单元施加显示数据中，为了减少消耗功率而使用CS(Charge Sharing，电荷分担)模式。
图1图示用于说明现有的源极驱动器所使用的CS模式的波形图。
如图所示，CS模式在源极驱动器的实际的输出时间结束之后，到下一个显示数据的输出时间前为止的待机状态(a)中，将输出电平维持在液晶驱动电压(AVDD)和接地(GND)电平的中间电平。从而，从源极驱动器输出的显示数据电平变换为正(a)或负区域(B)时，减小电压电平的变换宽度，由此，也可以减少消耗功率。
但是，最近，对源极驱动器应用了CS模式的现有的技术的消耗功率减少程度不能完全满足消费者要求的液晶显示装置的消耗功率减少要求。
发明内容
从而，本发明是为了解决如前所述的现有技术内在的问题而提出的，其目的在于提供一种在源极驱动器的待机状态时，对电压电平进行调节，并输出显示数据时，通过减少电压电平的变换宽度，可以使液晶显示装置的消耗功率最小化的液晶显示装置的源极驱动器驱动方法。
为了实现所述目的，根据本发明的一方面，提供一种接收极性信号(POL)和具有各个电平的多个伽马基准电压，对每一帧输出具有相反极性的显示数据，具有在当前帧中输出下一帧的显示数据时不输出显示数据的待机状态的液晶显示装置的源极驱动器驱动方法，该方法的特征在于，在所述源极驱动器的待机状态中，将所述源极驱动器的输出级与所述多个伽马基准电压中、具有任意的电平的伽马基准电压连接，所述输出级具有一定的电平。
根据本发明的其它一方面，在所述待机状态中，在下一帧的显示数据具有正区域的电压电平的情况下，将所述源极驱动器的输出级与具有正区域的中间电平的所述基准电压连接，在所述待机状态下，下一帧的显示数据具有负区域的电压电平的情况下，将所述源极驱动器的输出级与具有负区域的中间电平的所述伽马基准电压连接。
根据本发明的如前所述的结构，在源极驱动器的待机状态时，通过将输出级与伽马基准电压连接，可以得到消耗功率的降低、由液晶单元的充电时间缩短带来的响应速度的改善以及从源极驱动器输出的显示数据的输出延迟的抑制。
虽然与特定的实施方式相关联图示以及说明了本发明，但本发明不限于此，在不超出通过权利要求范围设置的本发明的精神或领域的范围内，本发明可以进行各种改造以及变形，这一点本领域具有普通常识的人可以容易地理解。
附图说明
图1是用于说明现有的源极驱动器所使用的CS模式的波形图。
图2是本发明的源极驱动器的方框结构图。
图3是输入本发明的源极驱动器的控制信号的波形图。
图4是本发明的源极驱动器的输出波形图。
具体实施方式
以下，参考附图对本发明的优选实施方式进行详细叙述。
图2图示本发明的源极驱动器的方框结构图。
本发明的源极驱动器包括：移位寄存器10、数据寄存器11、数据锁存器12、电位移位器(level shifter)13、DA转换器14、输出缓冲器15以及切换部件16。
移位寄存器10对数据寄存器11供给边缘采样时钟，数据寄存器11根据从移位寄存器10供给的所述边缘采样时钟，载入从定时控制装置(未图示)提供的RGB数据。然后，RGB数据存储为一个水平线的所有的显示数据，并被移动到接收极性信号(POL)的数据锁存器12。
DA转换器14从数据锁存器12接收显示数据以及伽马基准电压(GMA1～10)，使用根据灰度级别的伽马基准电压(GMA1～10)对各个显示数据赋予电压值。
输出缓冲器15由驱动液晶面板的运算放大器构成，如数据输出控制脉冲(LOAD)被起动(enable)则对液晶单元施加显示数据。
切换部件16接收所述伽马基准电压(GMA3、GMA8)，并选择性地与输出缓冲器15的输出级连接。
具有如前所述的结构的源极驱动器根据输入的极性信号(POL)，对每一帧生成具有相反的极性的显示数据，并与所述输出控制信号(LOAD)同步对液晶单元施加显示数据。此外，源极驱动器在不输入所述输出控制脉冲(LOAD)时，具有不输出显示数据的待机状态。此时，切换部件16将伽马基准电压(GMA3、GMA8)选择性地与源极驱动器的输出级连接，将输出级的电压电平维持在伽马基准电压(GMA3、GMA8)电平。
如参照图2以及图3考察本发明的源极驱动器的动作，则输入数据寄存器11的极性信号(POL)以脉冲形态被输入期间，根据输入输出缓冲器15的输出控制脉冲(LOAD)的输入定时而改变显示数据的极性。即，在极性信号(POL)的‘高电平’区间期间，输出控制脉冲(LOAD)在‘高电平’起动，则输出到源极驱动器的显示数据具有正的值。另一方面，极性信号(POL)的‘低电平’区间期间，输出到源极驱动器的显示数据具有负的值。
如前所述，源极驱动器在一帧期间输出正或负区域的显示数据，在到输出具有相反的极性的显示数据为止的待机状态下，通过切换部件16将伽马基准电压(GMA3、GMA8)选择性地与源极驱动器的输出级连接。这里，伽马基准电压‘GMA8’的电压电平为负区域的中间电平，伽马基准电压‘GMA3’的电压电平为正区域的中间电平。
首先，源极驱动器输出正区域的显示数据，在处于待机状态的情况下，切换部件16将伽马基准电压‘GMA8’与源极驱动器输出级连接。换言之，通过使源极驱动器输出级的电压电平移动到负区域的中间电平，在下一个负区域的显示数据被输出时，将电压电平变动宽度最小化。
接着，源极驱动器输出负区域的显示数据，在处于待机状态的情况下，切换部件16将伽马基准电压‘GMA3’与源极驱动器输出级连接。这是由于与将伽马基准电压‘GMA8’连接到源极驱动器输出级相反，使源极驱动器输出级的电压电平移动到正区域的中间电平的缘故。
图4表示本发明的源极驱动器的输出波形图，如图所示，在源极驱动器的实际的输出时间结束之后，到下一个显示数据的输出时间前为止的待机状态(a)下，将输出电平维持在正(a)或负(B)区域的中间电平。从而，从源极驱动器输出的显示数据电平变换为正(a)或负区域(B)时，将电压电平的变换宽度仅减小“C”区域，将源极驱动器具有的输出缓冲器15的驱动区域最小化。如前所述，最小化的电压电平变换宽度与图1中图示的现有的源极驱动器所使用的CS模式相比较，通过将输出缓冲器15的驱动区域缩小为1/2，可以高效地减少消耗功率。
从而，本发明不仅可以期待单纯的消耗功率的降低，而且通过将液晶单元的充电开始地点设定为中间电平，可以缩短液晶单元的充电时间，并可以期待液晶面板的电阻性以及寄生分量引起的从源极驱动器输出的显示数据波形的延迟抑制效果。

Claims (2)

1.一种液晶显示装置的源极驱动器驱动方法，接收极性信号(POL)和具有各个电平的多个伽马基准电压，对每一帧输出具有相反极性的显示数据，具有在当前帧中输出下一帧的显示数据时不输出显示数据的待机状态，其特征在于，
在所述源极驱动器的待机状态中，将所述源极驱动器的输出级与所述多个伽马基准电压中、具有任意的电平的伽马基准电压连接，使所述输出级具有一定的电平。
2.如权利要求1所述的液晶显示装置的源极驱动器驱动方法，其特征在于，在所述待机状态中，在下一帧的显示数据具有正区域的电压电平的情况下，将所述源极驱动器的输出级与具有正区域的中间电平的所述基准电压连接，
在所述待机状态下，在下一帧的显示数据具有负区域的电压电平的情况下，将所述源极驱动器的输出级与具有负区域的中间电平的所述伽马基准电压连接。
CNA2005101248594A 2005-01-10 2005-11-23 液晶显示装置的源极驱动器驱动方法 Pending CN1804985A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020050002063A KR20060081572A (ko) 2005-01-10 2005-01-10 액정표시장치의 소스 드라이버 구동방법
KR2063/05 2005-01-10

Publications (1)

Publication Number Publication Date
CN1804985A true CN1804985A (zh) 2006-07-19

Family

ID=36652760

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2005101248594A Pending CN1804985A (zh) 2005-01-10 2005-11-23 液晶显示装置的源极驱动器驱动方法

Country Status (5)

Country Link
US (1) US20060152466A1 (zh)
JP (1) JP2006195430A (zh)
KR (1) KR20060081572A (zh)
CN (1) CN1804985A (zh)
TW (1) TW200625263A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017156812A1 (zh) * 2016-03-17 2017-09-21 武汉华星光电技术有限公司 显示驱动电路及显示面板

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI337451B (en) * 2006-04-03 2011-02-11 Novatek Microelectronics Corp Method and related device of source driver with reduced power consumption
TWI380271B (en) * 2007-11-22 2012-12-21 Ili Technology Corp Driving circuit and related method of a display apparatus
TW201040908A (en) * 2009-05-07 2010-11-16 Sitronix Technology Corp Source driver system having an integrated data bus for displays
TW201044347A (en) * 2009-06-08 2010-12-16 Sitronix Technology Corp Integrated and simplified source driver system for displays
JP5596477B2 (ja) * 2010-09-15 2014-09-24 ラピスセミコンダクタ株式会社 表示パネルの駆動装置
CN104217691B (zh) 2014-08-28 2017-04-12 京东方科技集团股份有限公司 数据驱动电路、显示面板驱动方法及显示装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7298352B2 (en) * 2000-06-28 2007-11-20 Lg.Philips Lcd Co., Ltd. Apparatus and method for correcting gamma voltage and video data in liquid crystal display
CN100583216C (zh) * 2000-12-07 2010-01-20 株式会社日立制作所 半导体集成电路以及液晶显示系统
JP2003323160A (ja) * 2002-04-30 2003-11-14 Sony Corp 液晶表示装置およびその駆動方法、ならびに携帯端末

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017156812A1 (zh) * 2016-03-17 2017-09-21 武汉华星光电技术有限公司 显示驱动电路及显示面板

Also Published As

Publication number Publication date
JP2006195430A (ja) 2006-07-27
US20060152466A1 (en) 2006-07-13
TW200625263A (en) 2006-07-16
KR20060081572A (ko) 2006-07-13

Similar Documents

Publication Publication Date Title
US6977635B2 (en) Image display device
CN103021351B (zh) 显示装置及其消除偏移的方法
US7079103B2 (en) Scan-driving circuit, display device, electro-optical device, and scan-driving method
US11081040B2 (en) Pixel circuit, display device and driving method
US20100149171A1 (en) Source driver for driving a panel and related method for controlling a display
EP2017817A1 (en) Liquid crystal display device and driving method thereof
CN100529860C (zh) 可通过电荷分享来降低能量消耗的液晶显示装置
US8963909B2 (en) Data driving method for driving display panel, data driving circuit for performing the same, and display apparatus having the data driving circuit
CN1892782A (zh) 可移动液晶显示器及其驱动方法
CN1804985A (zh) 液晶显示装置的源极驱动器驱动方法
CN1888952A (zh) 液晶显示器及相应驱动方法
WO2017101573A1 (zh) 像素电路及其驱动方法、驱动电路、显示装置
KR101366851B1 (ko) 액정표시장치
US20090009503A1 (en) Liquid-crystal display
CN1909054A (zh) 液晶显示器以及驱动该液晶显示器的方法
KR102050850B1 (ko) 표시 패널의 구동 방법 및 이를 수행하는 표시 장치
CN103165063A (zh) 主动矩阵式多稳态显示装置与其显示面板的驱动方法
CN1917027A (zh) 用于驱动液晶显示面板的驱动电路
US20140368562A1 (en) Display device having improved contrast ratio
CN101968951A (zh) 时序控制器、显示器及其电荷分享功能控制方法
CN101551983B (zh) 应用于显示器的源极驱动电路的缓冲器与其控制方法
CN1648730A (zh) 可消除影像残留的方法及其液晶显示器
US20110084948A1 (en) Lcd driver circuit and driving method thereof
US8736595B2 (en) Driving device and driving method for image display device
CN102054416A (zh) 源极驱动器及其电荷分享功能控制方法

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication