CN102881268A - 一种液晶显示器驱动方法及液晶显示器 - Google Patents

一种液晶显示器驱动方法及液晶显示器 Download PDF

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CN102881268A
CN102881268A CN2012103315606A CN201210331560A CN102881268A CN 102881268 A CN102881268 A CN 102881268A CN 2012103315606 A CN2012103315606 A CN 2012103315606A CN 201210331560 A CN201210331560 A CN 201210331560A CN 102881268 A CN102881268 A CN 102881268A
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孟智明
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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Priority to EP13174229.8A priority patent/EP2706525A3/en
Priority to KR1020130084285A priority patent/KR101502222B1/ko
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
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    • G09G3/3685Details of drivers for data electrodes
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
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    • G09G3/36Control 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
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    • G09G3/3648Control of matrices with row and column drivers using an active matrix
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    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
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    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0421Structural details of the set of electrodes
    • G09G2300/0426Layout of electrodes and connections
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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    • G09G2310/06Details of flat display driving waveforms
    • G09G2310/067Special waveforms for scanning, where no circuit details of the gate driver are given
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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    • GPHYSICS
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    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
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    • G09G3/3614Control of polarity reversal in general

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Abstract

本发明公开了一种液晶显示器驱动方法及液晶显示器,液晶显示器包括栅极驱动电路、数据驱动电路、多个薄膜晶体管、多对栅线、多条数据线和多个像素电极组;每个像素电极组包含位于同一行的两个相邻像素电极,这两个相邻像素电极连接同一数据线并分别连接一对栅线中不同的栅线;液晶显示器有呈多行和多列状排列的像素,每个像素对应一像素电极,每个像素电极组对应的像素组成一像素组。该方法包括:在一帧画面中,各行像素按排列顺序依次驱动,在驱动任一行像素时,同一像素组的两像素先后驱动且驱动先后顺序在连续各帧画面中交替变化。因此,应用本发明,可使连接同一数据线的相邻像素电极对应的同一像素组的两像素充电均匀,从而提高画面质量。

Description

一种液晶显示器驱动方法及液晶显示器
技术领域
本发明涉及显示技术领域,特别是一种液晶显示器驱动方法及液晶显示器。
背景技术
近年来,显示技术发展迅速,平板显示装置具有完全平面化、质量轻、厚度薄以及省电等特点,符合未来图像显示装置的发展趋势。目前主要的平板显示装置包括等离子显示板(Plasma Display Panel,PDP)、液晶显示器(LiquidCrystal Display,LCD)、场发射显示器(Field Emission Display,FED)、有机发光二极管(Organic Light-Emitting Diode,OELD)显示装置等等,其中,LCD是发展最快、技术最成熟、应用最广泛的平板显示装置。
目前,多数LCD包括栅极驱动器和源极驱动器,分别用以提供扫描信号和数据信号,在进行画面显示时,在扫描信号的控制下,将一帧画面对应的扫描行逐行顺序打开,在一扫描行打开时,将相应的数据信号输入该扫描行,当该扫描行关闭时,将在打开时所输入的数据信息存入该扫描行的所有像素。现有的双栅结构的LCD驱动方法,在显示各帧画面时,同一行像素电极所对应的一对栅极(Gate)线的驱动顺序始终保持不变,从而会由于数据线的信号输出波形以及极性转换方式,造成像素电极充电不足,使得位于同一条数据线两侧的相邻像素电极充电不均匀,从而使画面在视觉上出现连续的垂直亮暗线,严重影响显示画面的质量。
发明内容
本发明实施例提供一种液晶显示器驱动方法及液晶显示器,用以使得双栅结构的液晶显示器在进行画面显示时,连接同一数据线的同一像素电极组中的两像素电极所对应的两像素充电均匀,从而提高显示画面的质量。
本发明实施例提供一种液晶显示器驱动方法,所述液晶显示器包括栅极驱动电路、数据驱动电路、多个薄膜晶体管、多对栅线、多条数据线和多个像素电极组;其中,每对所述栅线包括相邻的一奇数行栅线和一偶数行栅线,每个所述像素电极组包含位于同一行的两个相邻像素电极,同一像素电极组的两个像素电极分别通过薄膜晶体管连接同一条数据线并分别连接在一对栅线中不同的栅线上;所述液晶显示器上形成有呈多行和多列状排列的像素,每个像素对应一像素电极,每个像素电极组对应的像素组成一个像素组;
该方法包括:
在一帧画面中,各行像素按排列顺序依次驱动,在驱动任一行像素时,同一像素组的两像素先后驱动;同一像素组的两像素的驱动先后顺序在连续的各帧画面中交替变化。
所述同一像素电极组的两个像素电极位于对应数据线的两侧。
在连续的各帧画面中,各像素驱动信号的极性正负交替变化,以实现真正的点反转。
进一步地,所述栅极驱动电路有两个,所述栅线的两端分别与一个所述栅极驱动电路连接,对一条栅线所述两个栅极驱动电路同步施加驱动信号,从而缓解了画面延迟现象,进一步提高了画面质量。
本发明实施例提供一种液晶显示器,该液晶显示器包括:
栅极驱动电路;
数据驱动电路;
多个薄膜晶体管;
多对栅线,每对所述栅线包括相邻的一奇数行栅线和一偶数行栅线;
多条数据线;
多个像素电极组,每个所述像素电极组包含位于同一行的两个相邻像素电极,同一像素电极组的两个像素电极分别通过薄膜晶体管连接同一条数据线并分别连接在一对栅线中不同的栅线上;
所述液晶显示器上形成有呈多行和多列状排列的像素,每个像素对应一像素电极,每个像素电极组对应的像素组成一个像素组;
所述栅极驱动电路和所述数据驱动电路在一帧画面中按排列顺序依次驱动各行像素,在驱动任一行像素时,同一像素组的两像素先后驱动;同一像素组的两像素的驱动先后顺序在连续的各帧画面中交替变化。
通过以上技术方案可知,在本发明实施例中,在显示各帧画面时,各行像素按排列顺序依次驱动,在驱动任一行像素时,同一像素组的两像素先后驱动且驱动先后顺序在连续的各帧画面中交替变化,从而有效避免了因连接同一条数据线的同一像素电极组中的两像素电极所对应的两像素充电不均匀而造成画面中出现垂直亮暗线的现象。因此,本发明实施例可以使得双栅结构的液晶显示器在进行画面显示时,连接同一数据线的同一像素电极组中的两像素电极所对应的两像素充电均匀,消除画面中的垂直亮暗线,从而提高显示画面的质量。
附图说明
图1为画面连续显示时的多行像素驱动的示意图;
图2为图1中的左侧画面逐行扫描后的各像素极性的示意图;
图3为图1中的右侧画面逐行扫描后的各像素极性的示意图。
具体实施方式
本发明双栅结构的液晶显示器包括栅极驱动电路、数据驱动电路、多个薄膜晶体管、多对栅线、多条数据线和多个像素电极组;其中,每对所述栅线包括相邻的一奇数行栅线和一偶数行栅线,每个所述像素电极组包含位于同一行的两个相邻像素电极,同一像素电极组的两个像素电极分别通过薄膜晶体管连接同一条数据线并分别连接在一对栅线中不同的栅线上;所述液晶显示器上形成有呈多行和多列状排列的像素,每个像素对应一像素电极,每个像素电极组对应的像素组成一个像素组。
为了消除现有技术中因同一条数据线两侧的同组像素电极充电不均匀而造成的显示画面中出现垂直亮暗线的现象,本发明实施例提供一种液晶显示器驱动方法,该方法包括:各行像素按排列顺序依次驱动,在驱动任一行像素时,同一像素组的两像素先后驱动;同一像素组的两像素的驱动先后顺序在连续的各帧画面中交替变化。
所述同一像素电极组的两个像素电极位于对应数据线的两侧。
一个实施例,位于同一条数据线两侧的同一像素电极组的两个像素电极分别连接一对栅线中的奇数行栅线和偶数行栅线。在显示第一帧画面时,将所述奇数行栅线先于所述偶数行栅线驱动,然后在显示第二帧画面时,将所述偶数行栅线先于所述奇数行栅线驱动,接着在显示第三帧画面时,将所述奇数行栅线先于所述偶数行栅线驱动,以此类推,使奇数行栅线和偶数行栅线的驱动先后顺序在连续的各帧画面中交替变化,从而使位于同一条数据线两侧的同一像素电极组的两个像素电极所对应的两个像素的驱动先后顺序在连续的各帧画面中交替变化,弥补了由于同一像素组的两个像素充电情况不同而引起的亮暗差别,消除了画面视觉上的垂直亮暗线。
图1为画面连续显示时的多行像素驱动的示意图。如图1所示,将同一个像素组中的位于对应数据线左侧和右侧的像素分别定义为左像素和右像素。在图1中的左侧画面进行显示时,同一像素组中的左像素先于右像素驱动,则从整帧画面的角度观察,位于同一条数据线两侧的多个像素组中的各像素的驱动顺序排列成“Z”型;在下一帧画面(即图1中的右侧画面)进行显示时,同一像素组中的右像素先于左像素驱动,则从整帧画面的角度观察,位于同一条数据线两侧的多个像素组中的各像素的驱动顺序排列成反“Z”型。
优选地,在连续的各帧画面中,各像素驱动信号的极性正负交替变化,但各像素本身的极性始终保持不变,由于同一像素组中的两个像素的驱动先后顺序在连续的各帧画面中不断地交替变化,因此,在各帧画面逐行扫描完成后,同一位置上的像素在相邻的两帧画面中的极性刚好相反,实现了真正意义上的点反转。
图2为图1中的左侧画面逐行扫描后的各像素极性的示意图,图3为图1中的右侧画面逐行扫描后的各像素极性的示意图。
以图1中的第一行像素中的位于最左侧的像素组为例进行详细地说明,该像素组包含像素R和像素G。在显示图1中的左侧画面时,先驱动像素R且极性为正,然后驱动像素G且极性为负,如图2所示;在显示图1中的右侧画面时,先驱动像素G且极性为正,然后驱动像素R且极性为负,如图3所示。将图2与图3进行比较可知,在连续显示各帧画面时,实现了真正意义的点反转,进一步提高了显示画面的质量。
优选地,所述栅极驱动电路有两个,所述栅线的两端分别与一个所述栅极驱动电路连接,对一条栅线所述两个栅极驱动电路同步施加驱动信号,可以有效提高显示速度,缓解了画面延迟现象,进一步提高了画面质量。
本发明实施例提供一种液晶显示器,所述液晶显示器包括:
栅极驱动电路;
数据驱动电路;
多个薄膜晶体管;
多对栅线,每对所述栅线包括相邻的一奇数行栅线和一偶数行栅线;
多条数据线;
多个像素电极组,每个所述像素电极组包含位于同一行的两个相邻像素电极,同一像素电极组的两个像素电极分别通过薄膜晶体管连接同一条数据线并分别连接在一对栅线中不同的栅线上;
所述液晶显示器上形成有呈多行和多列状排列的像素,每个像素对应一像素电极,每个像素电极组对应的像素组成一个像素组;
所述栅极驱动电路和所述数据驱动电路在一帧画面中按排列顺序依次驱动各行像素,在驱动任一行像素时,同一像素组的两像素先后驱动;同一像素组的两像素的驱动先后顺序在连续的各帧画面中交替变化。
这里,所述同一像素电极组的两个像素电极位于对应数据线的两侧。在连续的各帧画面中,各像素驱动信号的极性正负交替变化。
优选地,所述栅极驱动电路有两个,所述栅线的两端分别与一个所述栅极驱动电路连接,用于对一条栅线同步施加驱动信号。
本发明实施例中的液晶显示器在进行画面显示时,采用上述方法实施例中的驱动方法,使得位于同一条数据线两侧的同一个像素组中的两像素充电均匀,消除显示画面中的垂直亮暗线,提高显示画面的质量,另外,采用双边栅线Gate的方式,缓解了大尺寸屏幕中的画面延迟现象,从而进一步提高显示画面的质量。
通过以上技术方案可知,在本发明实施例中,在显示各帧画面时,各行像素按排列顺序依次驱动,在驱动任一行像素时,同一像素组的两像素先后驱动且驱动先后顺序在连续的各帧画面中交替变化,从而有效避免了因连接同一条数据线的同一像素电极组中的两像素电极所对应的两像素充电不均匀而造成画面中出现垂直亮暗线的现象。因此,本发明实施例可以使得双栅结构的液晶显示器在进行画面显示时,连接同一数据线的同一像素电极组中的两像素电极所对应的两像素充电均匀,消除画面中的垂直亮暗线,从而提高显示画面的质量。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若对本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (8)

1.一种液晶显示器驱动方法,其特征在于,所述液晶显示器包括栅极驱动电路、数据驱动电路、多个薄膜晶体管、多对栅线、多条数据线和多个像素电极组;其中,每对所述栅线包括相邻的一奇数行栅线和一偶数行栅线,每个所述像素电极组包含位于同一行的两个相邻像素电极,同一像素电极组的两个像素电极分别通过薄膜晶体管连接同一条数据线并分别连接在一对栅线中不同的栅线上;所述液晶显示器上形成有呈多行和多列状排列的像素,每个像素对应一像素电极,每个像素电极组对应的像素组成一个像素组;
该方法包括:
在一帧画面中,各行像素按排列顺序依次驱动,在驱动任一行像素时,同一像素组的两像素先后驱动;同一像素组的两像素的驱动先后顺序在连续的各帧画面中交替变化。
2.如权利要求1所述的方法,其特征在于,所述同一像素电极组的两个像素电极位于对应数据线的两侧。
3.如权利要求1或2所述的方法,其特征在于,在连续的各帧画面中,各像素驱动信号的极性正负交替变化。
4.如权利要求1所述的方法,其特征在于,
所述栅极驱动电路有两个,所述栅线的两端分别与一个所述栅极驱动电路连接,对一条栅线所述两个栅极驱动电路同步施加驱动信号。
5.一种液晶显示器,其特征在于,包括:
栅极驱动电路;
数据驱动电路;
多个薄膜晶体管;
多对栅线,每对所述栅线包括相邻的一奇数行栅线和一偶数行栅线;
多条数据线;
多个像素电极组,每个所述像素电极组包含位于同一行的两个相邻像素电极,同一像素电极组的两个像素电极分别通过薄膜晶体管连接同一条数据线并分别连接在一对栅线中不同的栅线上;
所述液晶显示器上形成有呈多行和多列状排列的像素,每个像素对应一像素电极,每个像素电极组对应的像素组成一个像素组;
所述栅极驱动电路和所述数据驱动电路在一帧画面中按排列顺序依次驱动各行像素,在驱动任一行像素时,同一像素组的两像素先后驱动;同一像素组的两像素的驱动先后顺序在连续的各帧画面中交替变化。
6.如权利要求5所述的液晶显示器,其特征在于,所述同一像素电极组的两个像素电极位于对应数据线的两侧。
7.如权利要求5或6所述的液晶显示器,其特征在于,在连续的各帧画面中,各像素驱动信号的极性正负交替变化。
8.如权利要求5所述的液晶显示器,其特征在于,所述栅极驱动电路有两个,所述栅线的两端分别与一个所述栅极驱动电路连接,用于对一条栅线同步施加驱动信号。
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