CN105913823A - 高解析度解复用器驱动电路 - Google Patents

高解析度解复用器驱动电路 Download PDF

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CN105913823A
CN105913823A CN201610472865.7A CN201610472865A CN105913823A CN 105913823 A CN105913823 A CN 105913823A CN 201610472865 A CN201610472865 A CN 201610472865A CN 105913823 A CN105913823 A CN 105913823A
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drive circuit
demultiplexer
res
sub
control signal
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林建宏
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to CN201610472865.7A priority Critical patent/CN105913823A/zh
Priority to PCT/CN2016/090581 priority patent/WO2017219420A1/zh
Priority to US15/119,726 priority patent/US10297214B2/en
Publication of CN105913823A publication Critical patent/CN105913823A/zh
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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
    • G09G3/3614—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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] 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
    • 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
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
    • 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
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • 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

Abstract

本发明涉及一种高解析度解复用器驱动电路。该高解析度解复用器驱动电路包括：分别连接对应行的子像素的行扫描线，分别连接对应列的子像素的数据线，以及多个复用模块；每个复用模块包括两个薄膜晶体管，所述两个薄膜晶体管的栅极分别电性连接第一分路控制信号和第二分路控制信号，源极均电性连接同一数据信号，漏极分别电性连接临近的两同色子像素列的数据线；通过控制各数据信号的极性，控制除首尾的各子像素列在水平方向按照正正与负负交替的极性分布进行显示。本发明的高解析度解复用器驱动电路在省电模式下数据信号不需变换电压，因此可以有很大的省电效益，进一步可以省去控制信号数目，更可以降低控制信号的频率，更进一步达到省电的效果。

Description

高解析度解复用器驱动电路
技术领域
本发明涉及液晶显示技术领域，尤其涉及一种高解析度解复用器驱动电路。
背景技术
在液晶显示装置(LCD)与有机发光二极管显示装置(OLED)等平板显示装置中均包括多个阵列式排布的像素，每个像素通常包括红、绿、蓝三种颜色的子像素，每个子像素均受控于一条栅极线与一条数据线，栅极线用于控制子像素的开启和关闭，数据线通过向子像素施加不同的数据电压信号，使子像素显示不同的灰阶，从而实现全彩画面的显示。
近年来针对高PPI(每英寸像素数)面板上的开发越来越火热，当面板设计为越高的解析度上时相对因为负载变重及频率升高，因此会耗损更多的电力(Power)，而其中占很大的能量耗损会来自于解复用器(Demux)的设计，而当设计为越高解析度时，其解复用器因为充电时间变很短因此会由1推多变成1推2的方式，例如在小尺寸面板，解析度达4K以上时，就可能会用到1推2的解复用器设计，而由于PPI够高所以可以开启一些省电模式，可将Y方向信号线的解析度减半，来降低电力的损耗。
参见图1，其为现有的1推2的解复用器电路示意图。图1基于现有RGB三基色显示面板来说明1推2解复用器电路，显示面板部分的电路为常规设计，行扫描线G1，G2……分别连接对应行的子像素，数据线D1，D2……分别连接对应列的子像素，每一子像素通过相应薄膜晶体管电性连接该子像素所在行对应的扫描线和该子像素所在列对应的数据线；解复用器电路部分包括多个复用模块，以复用模块10为例，复用模块10包括两个薄膜晶体管，该两个薄膜晶体管的栅极分别电性连接第一分路控制信号Demux1和第二分路控制信号Demux2，源极均电性连接同一数据信号Data1(+)，也就是来自数据芯片(Data IC)信号的同一级性的电压，漏极分别电性连接一数据线D1和D3。
参见图2及图3，图2为现有1推2的解复用器电路的省电模式信号及电路示意图，图3为现有1推2的解复用器电路省电模式下的驱动信号图。若开启省电模式，此指将两个像素(pixel)当成一个最小单元(图2中每个像素包括RGB三个子像素)，因此在Y方向的解析度将减半，如图2两虚线方框为一个最小单元，并点R/G/B各色的色阶(Level)为L240/L127/L30，色阶是表示图像亮度强弱的指数标准，通常的8位色的RGB空间数字图像，分别用256个阶度表示红绿蓝，每个颜色的取值范围都是[0，255]，图2中红绿蓝各色的色阶分别为240，127及30。此时相关信号如图3所示，图示了G1(Gate signal，栅极信号)，数据信号Data1(+)，Data2(-)及Data3(+)，以及第一分路控制信号Demux1和第二分路控制信号Demux2。虽然邻近的同色(以两个pixel为最小单位)其色阶一样，但数据(Data)的信号仍需要有压差的变化，仍会有很大的电力损耗。
发明内容
因此，本发明的目的在于提供一种高解析度解复用器驱动电路，提升省电模式下的省电效益。
为实现上述目的，本发明提供了一种高解析度解复用器驱动电路，包括：分别连接对应行的子像素的行扫描线，分别连接对应列的子像素的数据线，以及多个复用模块；每个复用模块包括两个薄膜晶体管，所述两个薄膜晶体管的栅极分别电性连接第一分路控制信号和第二分路控制信号，源极均电性连接同一数据信号，漏极分别电性连接临近的两同色子像素列的数据线；通过控制各数据信号的极性，控制除首尾的各子像素列在水平方向按照正正与负负交替的极性分布进行显示。
其中，该驱动电路连接并驱动RGB三基色显示面板。
其中，当该驱动电路工作于省电模式下时，R/G/B子像素各色的色阶分别为240，127及30。
其中，当该驱动电路工作于省电模式下时，第一分路控制信号和第二分路控制信号不同。
其中，当该驱动电路工作于省电模式下时，第一分路控制信号和第二分路控制信号相同。
其中，每个栅极信号时间内，所述复用模块开关一次。
其中，每个栅极信号时间内，所述复用模块开关两次。
其中，除首尾的所述各子像素列在水平方向按照先正正后负负交替的极性分布进行显示。
其中，除首尾的所述各子像素列在水平方向按照先负负后正正交替的极性分布进行显示。
其中，所述各数据信号的极性按照正负交替的方式分布。
综上所述，本发明的高解析度解复用器驱动电路在省电模式下数据信号不需变换电压，因此可以有很大的省电效益，进一步可以省去控制信号数目，更可以降低控制信号的频率，更进一步达到省电的效果。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其他有益效果显而易见。
附图中，
图1为现有的1推2的解复用器电路示意图；
图2为现有1推2的解复用器电路的省电模式信号及电路示意图；
图3为现有1推2的解复用器电路省电模式下的驱动信号图；
图4为本发明高解析度解复用器驱动电路一较佳实施例的电路结构示意图；
图5为该较佳实施例的电路结构的省电模式信号及电路示意图；
图6为该较佳实施例的电路结构在省电模式下的第一驱动信号图；
图7为该较佳实施例的电路结构在省电模式下的第二驱动信号图；
图8为该较佳实施例的电路结构在省电模式下的第三驱动信号图。
具体实施方式
参见图4，其为本发明高解析度解复用器驱动电路一较佳实施例的电路结构示意图。该高解析度解复用器驱动电路的较佳实施例主要包括：分别连接对应行的子像素的行扫描线G1，G2……，分别连接对应列的子像素的数据线D1，D2……，以及多个复用模块20；每个复用模块20包括两个薄膜晶体管，所述两个薄膜晶体管的栅极分别电性连接第一分路控制信号Demux1和第二分路控制信号Demux2，源极均电性连接同一数据信号，漏极分别电性连接临近的两同色子像素列的数据线，实现由同一数据信号进行1推2，对于处于首尾位置的复用模块的漏极找不到临近的同色子像素列时可以设置为悬空；通过控制各数据信号Data0，Data1……的极性，控制除首尾的各子像素列在水平方向按照正正与负负交替的极性分布进行显示。子像素阵列所构成的显示面板可以为现有RGB三基色显示面板，显示面板部分的电路可以为常规设计。
本发明在1推2的解复用器设计中，Data IC信号同一级性的电压透过两个TFT元件开关分给显示区邻近的两个同色的数据线，并形成水平方向为++――++――……的极性显示方式，并在频率减半显示情况下，其中两组解复用器可为同一个信号，可变成共用，或为分开不同的信号。利用新的解复用器排列方式，将同色且邻近的两个信号线由同一组IC信号来控制，本发明在省电模式下(Y方向解析度减半)，因为同色的信号需求信号是一致的，因此可以用同一组IC信号电压控制，电压不需要做变换，达到省电的目的。
参见图5，其为该较佳实施例的电路结构的省电模式信号及电路示意图。结合图4，可发现其中有两个邻近的同色画素是由同一组IC信号提供(Data1～Data4)，因此在省电模式下(Y方向解析度减半)，如图5中两虚线方框所示为一个最小单元，并点R/G/B各色的色阶为L240/L127/L30。
参见图6，其为该较佳实施例的电路结构在省电模式下的第一驱动信号图。可发现数据信号不需要改变电压，其中解复用器为非共用方式，由Demux 1 and Demux 2组成。
参见图7，其为该较佳实施例的电路结构在省电模式下的第二驱动信号图。图7中Demux1与Demux2共用，为同样的信号，但每个Gate时间内，还是开关两次。
参见图8，其为该较佳实施例的电路结构在省电模式下的第三驱动信号图。图8中Demux1与Demux2共用，也为同样信号，但其每个Gate时间内，只开关一次。
本发明高解析度解复用器驱动电路的新的设计，在省电模式下(Y方向解析度减半)，其Data信号不需变换电压，因此可以有很大的省电效益，而在图7和图8中可以省去IC所提供解复用器的控制信号数目，而且图8更可以降低解复用器控制信号的频率，更进一步达到省电的效果。
综上所述，本发明的高解析度解复用器驱动电路在省电模式下数据信号不需变换电压，因此可以有很大的省电效益，进一步可以省去控制信号数目，更可以降低控制信号的频率，更进一步达到省电的效果。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (10)

1.一种高解析度解复用器驱动电路，其特征在于，包括：分别连接对应行的子像素的行扫描线，分别连接对应列的子像素的数据线，以及多个复用模块；每个复用模块包括两个薄膜晶体管，所述两个薄膜晶体管的栅极分别电性连接第一分路控制信号和第二分路控制信号，源极均电性连接同一数据信号，漏极分别电性连接临近的两同色子像素列的数据线；通过控制各数据信号的极性，控制除首尾的各子像素列在水平方向按照正正与负负交替的极性分布进行显示。
2.如权利要求1所述的高解析度解复用器驱动电路，其特征在于，该驱动电路连接并驱动RGB三基色显示面板。
3.如权利要求2所述的高解析度解复用器驱动电路，其特征在于，当该驱动电路工作于省电模式下时，R/G/B子像素各色的色阶分别为240，127及30。
4.如权利要求1所述的高解析度解复用器驱动电路，其特征在于，当该驱动电路工作于省电模式下时，第一分路控制信号和第二分路控制信号不同。
5.如权利要求1所述的高解析度解复用器驱动电路，其特征在于，当该驱动电路工作于省电模式下时，第一分路控制信号和第二分路控制信号相同。
6.如权利要求5所述的高解析度解复用器驱动电路，其特征在于，每个栅极信号时间内，所述复用模块开关一次。
7.如权利要求5所述的高解析度解复用器驱动电路，其特征在于，每个栅极信号时间内，所述复用模块开关两次。
8.如权利要求1所述的高解析度解复用器驱动电路，其特征在于，除首尾的所述各子像素列在水平方向按照先正正后负负交替的极性分布进行显示。
9.如权利要求1所述的高解析度解复用器驱动电路，其特征在于，除首尾的所述各子像素列在水平方向按照先负负后正正交替的极性分布进行显示。
10.如权利要求1所述的高解析度解复用器驱动电路，其特征在于，所述各数据信号的极性按照正负交替的方式分布。
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