CN112735322A - 一种gip电路及驱动方法 - Google Patents

一种gip电路及驱动方法 Download PDF

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CN112735322A
CN112735322A CN202110087585.5A CN202110087585A CN112735322A CN 112735322 A CN112735322 A CN 112735322A CN 202110087585 A CN202110087585 A CN 202110087585A CN 112735322 A CN112735322 A CN 112735322A
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张桂瑜
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Fujian Huajiacai Co Ltd
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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
    • 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3225Control 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
    • 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3266Details of drivers for scan electrodes
    • 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
    • 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • 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
    • 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3674Details of drivers for scan electrodes
    • G09G3/3677Details of drivers for scan electrodes suitable for active matrices only

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Abstract

本发明公布一种GIP电路及驱动方法,GIP电路包括晶体管T1、晶体管T2、晶体管T3、晶体管T4、晶体管T5、晶体管T6、晶体管T7、晶体管T8、晶体管T9、晶体管T10、晶体管T11、晶体管T12、晶体管T13和电容;晶体管T1连接晶体管T12、晶体管T2、晶体管T7、晶体管T4、晶体管T3和电容的第二极板;晶体管T6连接电容的第一极板;晶体管T2连接晶体管T8和晶体管T10;电压信号VGL1连接晶体管T12、晶体管T2、晶体管T11和晶体管T10;电压信号VGL2连接晶体管T5、晶体管T13和晶体管T3;上述技术方案中,通过电压信号VGL1和电压信号VGL2来控制容易发生漏电的晶体管,这样Q点就不受漏电的影响。

Description

一种GIP电路及驱动方法
技术领域
本发明涉及显示技术领域,尤其涉及一种GIP电路及驱动方法。
背景技术
近年来,显示面板目前已进入产品多元化,由于产品的多样化应用与客端需求,显示面板在向着轻、薄、低功耗与低成本方面发展。其中,低成本与低功耗是相对重要得课题,为达到此需求,通常是导入金属氧化物(MOX)晶体管来达到此目的。
金属氧化物(MOX)晶体管相较于硅材料的晶体管来说,金属氧化物(MOX)晶体管的优势在于高电子迁移率。当金属氧化物(MOX)晶体管和硅材料的晶体管在相同的充电能力下,因为金属氧化物晶体管的尺寸会比硅材料的晶体管的尺较小,因此金属氧化物晶体管的功耗比硅材料的晶体管的功耗低。但是,金属氧化物晶体管的临限电压Vth特性比硅材料的晶体管的Vth特性偏负些,金属氧化物晶体管的临限电压Vth的数值也有可能为负值。
为了降低显示面板的制造成本并借以实现窄边框的目的,在制造过程中通常采用GIP(Gate in Panel,门面板)技术,直接将栅极电路(即GIP电路)集成于平板显示面板上。当GIP电路中晶体管的临限电压Vth为负值时,会造成元件发生漏电,Q点受漏电影响后会无法保持(holding)电压准位。当栅源电压VGS比临限电压Vth大则有漏电产生,差值越大则漏电越大。
发明内容
为此,需要提供一种GIP电路及驱动方法,解决GIP电路无法通过栅极线G(n)正常输出信号的问题。
为实现上述目的,本实施例提供了一种GIP电路,包括晶体管T1、晶体管T2、晶体管T3、晶体管T4、晶体管T5、晶体管T6、晶体管T7、晶体管T8、晶体管T9、晶体管T10、晶体管T11、晶体管T12、晶体管T13和电容;
所述晶体管T1的栅极连接栅极线G(n-1),所述晶体管T1的漏极连接电压信号Vfwd,所述晶体管T1的源极连接所述晶体管T2的栅极、所述晶体管T4的栅极和所述晶体管T12的栅极;
所述晶体管T2的源极连接电压信号VGL1,所述晶体管T2的漏极连接所述晶体管T3的栅极、所述晶体管T8的源极、所述晶体管T10的漏极和所述晶体管T6的栅极;
所述晶体管T3的漏极连接到所述晶体管T1的源极与所述晶体管T4的栅极相连接的线路上,所述晶体管T3的源极连接电压信号VGL2;
所述晶体管T4的漏极连接时钟信号CK,所述晶体管T4的源极连接所述晶体管T5的漏极;
所述晶体管T5的栅极连接所述晶体管T12的漏极,所述晶体管T5的源极连接电压信号VGL2;
所述晶体管T6的漏极连接所述电容的第一极板,所述晶体管T6的源极连接电压信号VGL2,栅极线G(n)连接到晶体管T4的源极和晶体管T5的漏极相连接的线路上;
所述电容的第二极板连接到所述晶体管T1的源极与所述晶体管T4的栅极相连接的线路上;
所述晶体管T7的栅极连接栅极线G(n+1),所述晶体管T7的漏极连接电压信号Vbwd,所述晶体管T7的源极连接所述晶体管T2的栅极、所述晶体管T4的栅极和所述晶体管T12的栅极;
控制信号V2连接所述晶体管T8的栅极、所述晶体管T8的漏极和所述晶体管T11的栅极;
控制信号V1连接所述晶体管T9的栅极、所述晶体管T9的漏极和所述晶体管T10的栅极,所述晶体管T9的源极连接到所述晶体管T5的栅极与所述晶体管T12的漏极相连接的线路上;
所述晶体管T10的源极连接电压信号VGL1;
所述晶体管T11的漏极连接到所述晶体管T5的栅极与所述晶体管T12的漏极相连接的线路上,所述晶体管T11的源极连接电压信号VGL1;
所述晶体管T12的源极连接电压信号VGL1;
所述晶体管T13的栅极连接到所述晶体管T5的栅极与所述晶体管T12的漏极相连接的线路上,所述晶体管T13的漏极连接到所述晶体管T1的源极与所述晶体管T4的栅极相连接的线路上,所述晶体管T13的源极连接电压信号VGL2。
进一步地,所述GIP电路通过所述栅极线G(n)连接显示面板上的画素。
进一步地,所述GIP电路为多个,所述画素为多个,多个的画素阵列排布在显示面板上,每个画素均连接一个所述GIP电路的栅极线G(n)。
进一步地,所述晶体管T1、所述晶体管T2、所述晶体管T3、所述晶体管T4、所述晶体管T5、所述晶体管T6、所述晶体管T7、所述晶体管T8、所述晶体管T9、所述晶体管T10、所述晶体管T11、所述晶体管T12和所述晶体管T13均为金属氧化物晶体管。
进一步地,还包括显示面板;
所述晶体管T1、所述晶体管T2、所述晶体管T3、所述晶体管T4、所述晶体管T5、所述晶体管T6、所述晶体管T7、所述晶体管T8、所述晶体管T9、所述晶体管T10、所述晶体管T11、所述晶体管T12、所述晶体管T13和所述电容设置在显示面板上。
进一步地,所述显示面板为LCD显示面板。
本实施例还提供一种GIP电路驱动方法,应用于上述任意一项实施例所述的GIP电路,包括如下步骤:
在第一阶段,控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入低电位,栅极线G(n-1)写入高电位,栅极线G(n)写入低电位,栅极线G(n+1)写入低电位;
在第二阶段,控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入高电位,栅极线G(n-1)写入低电位,栅极线G(n)写入高电位,栅极线G(n+1)写入低电位;
在第三阶段,控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入低电位,栅极线G(n-1)写入低电位,栅极线G(n)写入低电位,栅极线G(n+1)写入高电位;
在第四阶段,控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入高电位,栅极线G(n-1)写入低电位,栅极线G(n)写入低电位,栅极线G(n+1)写入低电位;
其中,第一阶段、第二阶段、第三阶段和第四阶段为依次连续的四个阶段,在这四个阶段中,电压信号Vfwd均写入高电位,电压信号VBwd均写入低电位。
上述技术方案具有如下优点:
第一,通过电压信号VGL1和电压信号VGL2来控制容易发生漏电的晶体管(如晶体管T3和晶体管T13),这样Q点就不受漏电的影响,GIP电路仍可正常工作。
第二,可以改善显示面板的显示品质,提升显示面板的观感,进而提高显示面板的竞争力。
第三,GIP电路的结构简单,成本低,可以提升产品的品质与良率,具有广泛适用性。
附图说明
图1为本实施例所述GIP电路的结构示意图;
图2为本实施例所述GIP电路的时序图;
图3为本实施例设定临限电压Vth为负值,电压信号VGL2=-10V时,晶体管T3和晶体管T13的栅源电压VGS和电压信号VGL1之间的曲线图;
图4为本实施例所述GIP电路的模拟仿真结果;
图5为本实施例所述GIP电路正扫的时序图之一;
图6为本实施例所述GIP电路正扫的时序图之二;
图7为本实施例所述GIP电路反扫的时序图之一;
图8为本实施例所述GIP电路反扫的时序图之二。
具体实施方式
为详细说明技术方案的技术内容、构造特征、所实现目的及效果,以下结合具体实施例并配合附图详予说明。
请参阅图1,本实施例一种GIP电路,GIP电路也称作栅极电路,包括晶体管T1、晶体管T2、晶体管T3、晶体管T4、晶体管T5、晶体管T6、晶体管T7、晶体管T8、晶体管T9、晶体管T10、晶体管T11、晶体管T12、晶体管T13和电容。所述晶体管T1的栅极连接栅极线G(n-1),所述晶体管T1的漏极连接于电压信号Vfwd,所述晶体管T1的源极连接所述晶体管T2的栅极、所述晶体管T4的栅极和所述晶体管T12的栅极。所述晶体管T2的源极连接电压信号VGL1,所述晶体管T2的漏极连接所述晶体管T3的栅极、所述晶体管T8的源极、所述晶体管T10的漏极和所述晶体管T6的栅极。所述晶体管T3的漏极连接到所述晶体管T1的源极与所述晶体管T4的栅极相连接的线路上,所述晶体管T3的源极连接电压信号VGL2。所述晶体管T4的漏极连接时钟信号CK,所述晶体管T4的源极连接所述晶体管T5的漏极。所述晶体管T5的栅极连接所述晶体管T12的漏极,所述晶体管T5的源极连接电压信号VGL2。所述晶体管T6的漏极连接所述电容的第一极板。电容的第一极板还连接到晶体管T4的源极和晶体管T5的漏极相连接的线路上。所述晶体管T6的源极连接电压信号VGL2,栅极线G(n)连接到晶体管T4的源极和晶体管T5的漏极相连接的线路上。所述电容的第二极板连接到所述晶体管T1的源极与所述晶体管T4的栅极相连接的线路上。所述晶体管T7的栅极连接栅极线G(n+1),所述晶体管T7的漏极连接电压信号Vbwd,电压信号Vbwd可以连接电压信号VGL2,所述晶体管T7的源极连接所述晶体管T2的栅极、所述晶体管T4的栅极和所述晶体管T12的栅极。控制信号V2连接所述晶体管T8的栅极、所述晶体管T8的漏极和所述晶体管T11的栅极。控制信号V1连接所述晶体管T9的栅极、所述晶体管T9的漏极和所述晶体管T10的栅极,所述晶体管T9的源极连接到所述晶体管T5的栅极与所述晶体管T12的漏极相连接的线路上。所述晶体管T10的源极连接电压信号VGL1。所述晶体管T11的漏极连接到所述晶体管T5的栅极与所述晶体管T12的漏极相连接的线路上,所述晶体管T11的源极连接电压信号VGL1。所述晶体管T12的源极连接电压信号VGL1。所述晶体管T13的栅极连接到所述晶体管T5的栅极与所述晶体管T12的漏极相连接的线路上。所述晶体管T13的漏极连接到所述晶体管T1的源极与所述晶体管T4的栅极相连接的线路上,所述晶体管T13的源极连接电压信号VGL2。
所述晶体管T3的漏极、所述晶体管T1的源极、所述晶体管T4的栅极相连接的线路上设置有Q点,Q点还可以连接到晶体管T13的漏极。所述晶体管T2的漏极、所述晶体管T3的栅极、所述晶体管T8的源极、所述晶体管T10的漏极和所述晶体管T6的栅极相连接的线路上设置有P1点。所述晶体管T5的栅极、所述晶体管T12的漏极和所述晶体管T9的源极相连接的线路上设置有P2点,P2点还可以连接到晶体管T11的漏极和晶体管T13的栅极。需要说明的是,下文的P点均可指代P1点或者P2点。
需要说明的是,控制信号V1和控制信号V2二者为交替工作,即在一帧时间内,控制信号V1写入高电位,控制信号V2写入低电位,而在下一帧时间内,控制信号V1写入低电位,控制信号V2写入高电位。
需要说明的是,电压信号Vfwd写入的是高电位,我们可以设定电压信号Vfwd写入的高电位为15伏(V),这相当于电压信号VGH为15伏(V)。而电压信号Vbwd写入的是低电位,我们可以设定电压信号Vbwd写入的低电位为-10伏(V)。
当GIP电路中晶体管的临限电压Vth为负值时,会造成元件发生漏电,Q点受漏电影响后会无法保持(holding)电压准位。当栅源电压VGS比临限电压Vth大则有漏电产生,差值越大则漏电越大。
上述技术方案具有如下优点:
第一,通过电压信号VGL1和电压信号VGL2来控制容易发生漏电的晶体管(如晶体管T3和晶体管T13),这样Q点就不受漏电的影响,GIP电路仍可正常工作。
第二,可以改善显示面板的显示品质,提升显示面板的观感,进而提高显示面板的竞争力。
第三,GIP电路的结构简单,成本低,可以提升产品的品质与良率,具有广泛适用性。
在本实施例中,本申请的GIP电路是作用于显示面板的画素,每个画素一般为红蓝绿中的任意一种。所述电路通过所述栅极线G(n)连接显示面板上的画素。所述画素为多个,多个的画素阵列排布在显示面板上。
上述晶体管T1、晶体管T2、晶体管T3、晶体管T4、晶体管T5、晶体管T6、晶体管T7、晶体管T8、晶体管T9、晶体管T10、晶体管T11、晶体管T12、晶体管T13和电容可以作为一个GIP单元,所述GIP电路包括多个GIP单元级联。每个画素均连接一个所述GIP单元的栅极线G(n),每个GIP单元通过时钟信号线CK、STV线等和驱动ic连接。驱动ic是显示面板成像系统的主要部分,是集成了电阻,调节器,比较器和功率晶体管等部件,驱动ic主要给画素提供补偿电流的作用。
在本实施例中,晶体管作为开关来控制线路的导通与否。所述晶体管T1、所述晶体管T2、所述晶体管T3、所述晶体管T4、所述晶体管T5、所述晶体管T6、所述晶体管T7、所述晶体管T8、所述晶体管T9、所述晶体管T10、所述晶体管T11、所述晶体管T12和所述晶体管T13均为薄膜晶体管。薄膜晶体管来驱动液晶像素点可以达到高速度、高亮度、高对比度的显示屏幕信息。在某些实施例中,上述晶体管(T1至T13)还可以为MOS管(即金属-氧化物-半导体场效应管)、结场效应管……
在此以底栅结构的薄膜晶体管为例,薄膜晶体管包括栅极、源极、漏极和有源层。栅极上设置有栅极绝缘层,栅极绝缘层上设置有有源层,有源层上设置有源极和漏极,源极和漏极位于有源层上的两侧,源极和漏极不在有源层的中部,这样有源层与源极、漏极之间形成导电沟道。其中,有源层的材料可以是铟镓锌氧化物(indiumgallium zinc oxide,IGZO)、铟锌锡氧化物(indium zinc tin oxide,IZTO)、铟镓锌钛氧化物(indium galliumzinc tioxide,IGZTO)或其他具有相似特性的材料。
在优选的实施例中,所述晶体管T1、所述晶体管T2、所述晶体管T3、所述晶体管T4、所述晶体管T5、所述晶体管T6、所述晶体管T7、所述晶体管T8、所述晶体管T9、所述晶体管T10、所述晶体管T11、所述晶体管T12和所述晶体管T13均为金属氧化物晶体管。因为金属氧化物晶体管的架构的尺寸会比硅材料的晶体管的尺较小,其功耗低,金属氧化物晶体管被广泛地应用于显示面板领域中。
在本实施例中,所述晶体管T1、所述晶体管T2、所述晶体管T3、所述晶体管T4、所述晶体管T5、所述晶体管T6、所述晶体管T7、所述晶体管T8、所述晶体管T9、所述晶体管T10、所述晶体管T11、所述晶体管T12、所述晶体管T13和所述电容设置在电路板上。而后,承载有所述晶体管T1、所述晶体管T2、所述晶体管T3、所述晶体管T4、所述晶体管T5、所述晶体管T6、所述晶体管T7、所述晶体管T8、所述晶体管T9、所述晶体管T10、所述晶体管T11、所述晶体管T12、所述晶体管T13和所述电容的电路板是设置在显示面板上。显示面板具有显示图像或者触控功能,显示面板可被用作手机、平板、电脑、车载显示屏、摄影机等各个领域中。
在本实施例中,所述晶体管T1、所述晶体管T2、所述晶体管T3、所述晶体管T4、所述晶体管T5、所述晶体管T6、所述晶体管T7、所述晶体管T8、所述晶体管T9、所述晶体管T10、所述晶体管T11、所述晶体管T12、所述晶体管T13和所述电容设置在显示面板上。
在本实施例中,所述显示面板为OLED显示面板或者LCD显示面板。要说明的是,OLED(OrganicLight-Emitting Diode)又称为有机电激光显示、有机发光半导体,OLED显示面板比LCD显示面板具有更轻薄、亮度高、功耗低、响应快、清晰度高、柔性好、发光效率高等特点,能满足消费者对显示技术的新需求。而LCD(Liquid Crystal Display)称作液晶显示器,LCD显示面板的优势是体积小、功耗低和高亮度。
请参阅图2至图8,本实施例还提供一种GIP电路驱动方法,应用于上述任意一项实施例所述的一种GIP电路,包括如下步骤:
在第一阶段(即预充阶段),控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入低电位,栅极线G(n-1)写入高电位,栅极线G(n)写入低电位,栅极线G(n+1)写入低电位。
在第二阶段(即输出阶段),控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入高电位,栅极线G(n-1)写入低电位,栅极线G(n)写入高电位,栅极线G(n+1)写入低电位。在第一阶段和第二阶段中,Q点的电位都是比较高的电位,Q点不受晶体管T3和晶体管T13的影响,使得晶体管T4可以较好地通过栅极线G(n)输出资料到画素中。
在第三阶段(即复位阶段),控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入低电位,栅极线G(n-1)写入低电位,栅极线G(n)写入低电位,栅极线G(n+1)写入高电位。
在第四阶段(即复位完成阶段),控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入高电位,栅极线G(n-1)写入低电位,栅极线G(n)写入低电位,栅极线G(n+1)写入低电位。
其中,第一阶段、第二阶段、第三阶段和第四阶段为依次连续的四个阶段,在这四个阶段中,电压信号Vfwd均写入高电位,电压信号VBwd均写入低电位。
当GIP电路的临限电压Vth为负值时,为使Q点不被晶体管T3和晶体管T13的电压信号VGL下拉,故要满足:晶体管T3和晶体管T13的栅源电压VGS<临限电压Vth,因为晶体管T3和晶体管T13为要解决问题的源头。其中,晶体管T3和晶体管T13的栅源电压VGS为P点的电压减去VGL2的电压。因此设计两组电压信号VGL(电压信号VGL1和电压信号VGL2)来对GIP电路进行驱动,确保栅极线G(n)可以输出信号资料。
电压信号VGL1、电压信号VGL2和晶体管之间的关系如下所示:
(1)电压信号VGL1连接晶体管T2、晶体管T12、晶体管T10和晶体管T11,电压信号VGL2通过Q点下拉P点(P点可指代P1点或P2点)的电位,电压信号VGL2通过控制信号V1或者控制信号V2来下拉P点(P点可指代P1点或P2点)的电位。
(2)电压信号VgL2连接晶体管T3、晶体管T13、晶体管T5、晶体管T6、电压信号Vbwd、时钟信号CK,电压信号VgL2下拉Q点的电位和栅极线G(n)的电位,且还必须满足:电压信号VGL1的电压小于电压信号VGL2的电压。这样GIP电路上的晶体管T3和晶体管T13不会发生漏电,GIP电路通过栅极线G(n)输出资料到画素上,画素不会发生异常。上述技术方案可以改善显示面板的显示品质,提升显示面板的观感,进而提高显示面板的竞争力。
请参阅图3和图4,依照上述方法来进行仿真实验,根据仿真实验得出来的结果如下:
请参阅图3,当设定临限电压Vth为负值,电压信号VGL2=-10V时,晶体管T3和晶体管T13的栅源电压VGS和电压信号VGL1之间的关系:因为晶体管T3和晶体管T13会拉低Q点的电位,当电压信号VGL1在(-12)V~(-14)V时,晶体管T3和晶体管T13的栅源电压VGS<0,晶体管T3和晶体管T13不工作,GIP电路可以通过栅极线G(n)稳定地输出资料到画素上,使得显示面板可以正常显示画面。
请参阅图4,图4的横坐标的单位为秒,纵坐标的单位为电压。通过仿真实验设定临限电压Vth为负值时,栅极线G(201)的电压在1.903ms时从-10v左右提高到13v左右,栅极线G(201)表示第201级的gout输出的电压;电压信号VgL1一直稳定在-10v左右;电压信号VgL2一直稳定在-13v左右;Q点的电压在1.846ms左右从-10v提高到12v左右,而后逐渐下降,但是又在1.903ms时提高到27v左右。在电压信号VgL1和电压信号VgL2控制下,Q点的电压不会被晶体管T3和晶体管T13下拉。
请参阅图5和图6,图5和图6列举了GIP电路的正扫时序图。GIP电路包括16个联级,第一级GIP单元通过栅极线G(n,此时n=1)连接画素和第二级GIP单元,第二级GIP单元通过栅极线G(n,此时n=2)连接画素和第三级GIP单元。CK1为GIP电路中第1级GIP单元的CK线,时钟信号CK2为GIP电路中第2级GIP单元的CK线,依此类推,共计是16phase,总共16个ck。Stv1线是GIP电路中第一级GIP单元和第三级GIP单元的stv线,Stv2线是GIP电路中第二级GIP单元和第四级GIP单元的stv线。Stv3线是GIP电路中第五级GIP单元和第七级GIP单元的stv线。Stv4线是GIP电路中第六级GIP单元和第八级GIP单元的stv线,依此类推。
驱动ic驱动STV1线、STV2线、STV3线……依次写入高电位,例如STV1线、STV2线、STV3线……均写入7H时长的高电位。驱动ic驱动时钟信号线CK1、时钟信号线CK2、时钟信号线CK3……依次写入高电位,例如时钟信号线CK1、时钟信号线CK2、时钟信号线CK3……均写入2H时长的高电位。
请参阅图7和图8,图7和图8列举了GIP电路的反扫时序图,GIP电路的反扫的顺序和GIP电路的正扫的顺序是相反的。例如图5中是第十六级GIP电路作为GIP电路联级的最后一级,那么GIP电路在反扫中,时钟信号线CK16先写入高电位,接着时钟信号线CK15、时钟信号线CK14、时钟信号线CK13……依次写入高电位。同理,STV3线、STV2线、STV1线为自先而后的顺序写入高电位。
需要说明的是,尽管在本文中已经对上述各实施例进行了描述,但并非因此限制本发明的专利保护范围。因此,基于本发明的创新理念,对本文所述实施例进行的变更和修改,或利用本发明说明书及附图内容所作的等效结构或等效流程变换,直接或间接地将以上技术方案运用在其他相关的技术领域,均包括在本发明的专利保护范围之内。

Claims (7)

1.一种GIP电路,其特征在于,包括晶体管T1、晶体管T2、晶体管T3、晶体管T4、晶体管T5、晶体管T6、晶体管T7、晶体管T8、晶体管T9、晶体管T10、晶体管T11、晶体管T12、晶体管T13和电容;
所述晶体管T1的栅极连接栅极线G(n-1),所述晶体管T1的漏极连接电压信号Vfwd,所述晶体管T1的源极连接所述晶体管T2的栅极、所述晶体管T4的栅极和所述晶体管T12的栅极;
所述晶体管T2的源极连接电压信号VGL1,所述晶体管T2的漏极连接所述晶体管T3的栅极、所述晶体管T8的源极、所述晶体管T10的漏极和所述晶体管T6的栅极;
所述晶体管T3的漏极连接到所述晶体管T1的源极与所述晶体管T4的栅极相连接的线路上,所述晶体管T3的源极连接电压信号VGL2;
所述晶体管T4的漏极连接时钟信号CK,所述晶体管T4的源极连接所述晶体管T5的漏极;
所述晶体管T5的栅极连接所述晶体管T12的漏极,所述晶体管T5的源极连接电压信号VGL2;
所述晶体管T6的漏极连接所述电容的第一极板,所述晶体管T6的源极连接电压信号VGL2,栅极线G(n)连接到晶体管T4的源极和晶体管T5的漏极相连接的线路上;
所述电容的第二极板连接到所述晶体管T1的源极与所述晶体管T4的栅极相连接的线路上;
所述晶体管T7的栅极连接栅极线G(n+1),所述晶体管T7的漏极连接电压信号Vbwd,所述晶体管T7的源极连接所述晶体管T2的栅极、所述晶体管T4的栅极和所述晶体管T12的栅极;
控制信号V2连接所述晶体管T8的栅极、所述晶体管T8的漏极和所述晶体管T11的栅极;
控制信号V1连接所述晶体管T9的栅极、所述晶体管T9的漏极和所述晶体管T10的栅极,所述晶体管T9的源极连接到所述晶体管T5的栅极与所述晶体管T12的漏极相连接的线路上;
所述晶体管T10的源极连接电压信号VGL1;
所述晶体管T11的漏极连接到所述晶体管T5的栅极与所述晶体管T12的漏极相连接的线路上,所述晶体管T11的源极连接电压信号VGL1;
所述晶体管T12的源极连接电压信号VGL1;
所述晶体管T13的栅极连接到所述晶体管T5的栅极与所述晶体管T12的漏极相连接的线路上,所述晶体管T13的漏极连接到所述晶体管T1的源极与所述晶体管T4的栅极相连接的线路上,所述晶体管T13的源极连接电压信号VGL2。
2.根据权利要求1所述的一种GIP电路,其特征在于,所述GIP电路通过所述栅极线G(n)连接显示面板上的画素。
3.根据权利要求2所述的一种GIP电路,其特征在于,所述GIP电路为多个,所述画素为多个,多个的画素阵列排布在显示面板上,每个画素均连接一个所述GIP电路的栅极线G(n)。
4.根据权利要求1所述的一种GIP电路,其特征在于,所述晶体管T1、所述晶体管T2、所述晶体管T3、所述晶体管T4、所述晶体管T5、所述晶体管T6、所述晶体管T7、所述晶体管T8、所述晶体管T9、所述晶体管T10、所述晶体管T11、所述晶体管T12和所述晶体管T13均为金属氧化物晶体管。
5.根据权利要求1所述的一种GIP电路,其特征在于,还包括显示面板;
所述晶体管T1、所述晶体管T2、所述晶体管T3、所述晶体管T4、所述晶体管T5、所述晶体管T6、所述晶体管T7、所述晶体管T8、所述晶体管T9、所述晶体管T10、所述晶体管T11、所述晶体管T12、所述晶体管T13和所述电容设置在显示面板上。
6.根据权利要求5所述的一种GIP电路,其特征在于,所述显示面板为LCD显示面板。
7.一种GIP电路驱动方法,其特征在于,应用于权利要求1至6任意一项所述的GIP电路,包括如下步骤:
在第一阶段,控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入低电位,栅极线G(n-1)写入高电位,栅极线G(n)写入低电位,栅极线G(n+1)写入低电位;
在第二阶段,控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入高电位,栅极线G(n-1)写入低电位,栅极线G(n)写入高电位,栅极线G(n+1)写入低电位;
在第三阶段,控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入低电位,栅极线G(n-1)写入低电位,栅极线G(n)写入低电位,栅极线G(n+1)写入高电位;
在第四阶段,控制信号V1写入高电位,控制信号V2写入低电位,时钟信号CK写入高电位,栅极线G(n-1)写入低电位,栅极线G(n)写入低电位,栅极线G(n+1)写入低电位;
其中,第一阶段、第二阶段、第三阶段和第四阶段为依次连续的四个阶段,在这四个阶段中,电压信号Vfwd均写入高电位,电压信号VBwd均写入低电位。
CN202110087585.5A 2021-01-22 2021-01-22 一种gip电路及驱动方法 Pending CN112735322A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113870787A (zh) * 2021-09-29 2021-12-31 华映科技(集团)股份有限公司 一种解决Vth为负值时无法动作的GIP电路及其驱动方法
CN114170989A (zh) * 2022-01-11 2022-03-11 福建华佳彩有限公司 一种提高显示屏稳定性的gip电路及其驱动方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113870787A (zh) * 2021-09-29 2021-12-31 华映科技(集团)股份有限公司 一种解决Vth为负值时无法动作的GIP电路及其驱动方法
CN114170989A (zh) * 2022-01-11 2022-03-11 福建华佳彩有限公司 一种提高显示屏稳定性的gip电路及其驱动方法

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