CN111833784A - 显示驱动装置 - Google Patents

显示驱动装置 Download PDF

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CN111833784A
CN111833784A CN202010304895.3A CN202010304895A CN111833784A CN 111833784 A CN111833784 A CN 111833784A CN 202010304895 A CN202010304895 A CN 202010304895A CN 111833784 A CN111833784 A CN 111833784A
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voltage
reference voltage
sensing line
display driving
limiter
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CN111833784B (zh
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金永福
金元
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LX Semicon Co Ltd
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Silicon Works Co Ltd
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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
    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • 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]
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    • 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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0289—Details of voltage level shifters arranged for use in a driving circuit
    • 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
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
    • 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
    • G09G2330/08—Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix

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Abstract

显示驱动装置包括感测线和电压限制器，其中，感测线配置为感测显示面板的像素信号，且电压限制器针对每个感测线而设置。电压限制器感测感测线的电压变化，并将感测线的电压电平限制为参考电压。

Description

显示驱动装置
技术领域
各种实施例大体上涉及显示装置，更具体地，涉及感测显示面板的像素信号的显示驱动装置。
背景技术
通常，显示装置包括显示面板、显示驱动装置和定时控制器。显示驱动装置将数字图像数据转换为源极驱动信号，并将源极驱动信号提供至显示面板。
根据退化程度，显示面板可能具有在像素之间不均匀的特性。为了补偿像素之间的这种特性偏差，显示驱动装置检测像素信号，将像素信号转换为作为数字信号的像素数据，并将像素数据提供至定时控制器。
然而，在现有技术中，当由于显示面板的某个像素中的缺陷而使大于正常通道的像素电流的过电流流动时，电流-电压转换器的输入和输出的电压变化突然增加，因此，相邻正常通道的数据值可能受到通道之间的寄生电容器的影响。
因此，在相关技术中，存在这样的问题，即由于缺陷通道对正常通道的数据的影响，无法正常执行对像素之间的特性偏差的补偿，因此在图像质量方面无法获得良好结果。
发明内容
各种实施例涉及一种显示驱动装置，其能够通过限制由于在缺陷像素中出现的过电流而引起的突然的电压变化来最小化缺陷像素对正常通道的感测数据的影响。
在一个实施例中，显示驱动装置可以包括：感测线，配置为感测显示面板的像素信号；以及电压限制器，针对每个所述感测线而设置。电压限制器可以感测感测线的电压变化，并将感测线的电压电平限制为参考电压。
根据实施例，可以通过限制由于在缺陷像素中出现的过电流而引起的突然的电压变化来最小化显示面板的缺陷像素对正常通道的感测数据的影响。
此外，根据实施例，由于可以预期正常补偿，所以可以改善图像质量方面的性能。
此外，根据实施例，可以通过最小化在出现少量的缺陷像素时所引起的图像质量退化来预期可靠性或生产率的改善。
附图说明
图1是示出根据实施例的显示驱动装置的示例的表示的框图。
图2是示出根据实施例的显示驱动装置的示例的表示的框图，其中图1的电压限制器由二极管配置。
图3是示出根据实施例的显示驱动装置的示例的表示的框图，其中图1的电压限制器由比较器配置。
具体实施方式
实施例提供了一种显示驱动装置，其能够通过在缺陷像素中出现过电流时限制相应通道的电压变化来最小化显示面板的缺陷像素对正常通道的感测数据的影响。
在实施例中，在开始感测操作之前，可将参考电压设定为等于或近似于感测线的初始值的值。
在实施例中，可以将第一参考电压和第二参考电压设定为二极管的阈值电压。
在实施例中，初始化周期可以被定义为用于在从显示面板感测到像素信号之前将感测线初始化位参考电压的周期。
虽然实施例示出在缺陷像素中发送过电流的情况，但应注意，实施例不限于此。即使在由于静电放电而通过感测焊盘将过电流引入感测线的情况下，实施例也可以将感测线的电压电平限制为参考电压。
在下文中，将参考附图详细描述本公开的实施例。本文和权利要求中使用的术语不应被解释为限于一般的或字典的含义，并且应被解释为与本公开的技术方面相对应的含义和概念。
在此描述的实施例和在附图中示出的配置是本公开的优选实施例，但是不代表本公开的全部技术特征。因此，可以在提交本申请时对其进行各种等同配置和修改。
图1是示出根据实施例的显示驱动装置100的示例的表示的框图。
参照图1，根据本实施例的显示驱动装置100包括向显示面板200提供源极驱动信号的源极驱动器(SD-IC)。为了便于说明，图1示出了源极驱动器(SD-IC)内部的一部分。图1示出了感测来自显示面板200的像素信号以用于显示面板200的外部补偿的组件。
作为显示面板200，可以使用液晶面板、有机发光二极管(OLED)面板等。
显示面板200可以包括矩阵形式的像素阵列。像素阵列可以包括R(红色)、G(绿色)和B(蓝色)像素，或者还包括用于改善亮度的W(白色)像素。每个像素可以包括像素电路，该像素电路向发光元件提供与从显示驱动装置100提供的源极驱动信号相对应的电流。
像素电路可以包括驱动晶体管，该驱动晶体管向发光元件提供对应于源极驱动信号的电流。驱动晶体管的特性(诸如阈值电压和迁移率)或者发光元件的特性(诸如阈值电压)根据像素的位置可以是不均匀的，或者随着驱动时间的推移，由于驱动晶体管和发光元件的退化而发生亮度不均匀现象。
为了补偿像素的这种特性，显示驱动装置100可以感测表示显示面板200的像素特性的像素信号，可以将像素信号转换为作为数字信号的像素数据，并且可以将像素数据提供至控制器(未示出)。例如，显示驱动装置100可以配置为感测作为像素信号的电流或电压。图1的实施例示出了一种配置，其中电流被感测为像素信号，然后被转换为电压。
像素信号可用于计算像素电路中的驱动晶体管的特性，诸如阈值电压和迁移率，以及发光元件的退化特性，诸如阈值电压。由于流经发光元件的像素电流根据驱动晶体管的阈值电压和迁移率以及发光元件的阈值电压而变化，所以像素电流可以用于计算像素的上述特性的值。此外，像素的特性值可用于补偿数字图像数据。
在显示面板200的像素中出现缺陷且存在过电流Idamage流动的情况下，正常通道的感测数据可能受到缺陷通道与正常通道之间的寄生电容器Cpara的影响。
因此，本公开公开了如下一种显示驱动装置100，其能够通过限制由于在显示面板的缺陷像素中出现的过电流而引起的突然的电压变化，来最小化缺陷通道对正常通道的感测数据的影响。
为此，显示驱动装置100可以在用于感测显示面板200的像素信号的每个感测线SL中包括电压限制器10。这种电压限制器10可以检测感测线SL的电压变化，并且可以将电压变化限制为参考电压。
上述显示驱动装置100可以包括针对各个感测线SL设置的电压限制器10和电流-电压转换器20，以及模数转换器30。
作为用于感测显示面板200的像素信号的布线，每个感测线SL电连接感测焊盘12和电流-电压转换器20。感测焊盘12可以是用于从显示面板200读取像素信号的读取焊盘，且像素信号可例示为每个像素的电流IPXL。
电流-电压转换器20可以将与通过感测线SL传送的像素信号对应的电流IPXL转换为电压，并且可以将该电压提供至模数转换器30。例如，电流-电压转换器20可以由将电流转换为电压的积分电路来配置。
模数转换器30将与每个像素的电流IPXL对应的电压转换为作为数字信号的像素数据，并将像素数据提供至定时控制器。例如，模数转换器30可以包括采样电路，该采样电路以预定顺序对各个像素的电压进行采样。
可以为用于感测显示面板200的感测通道CH的像素信号的每个感测线SL设置电压限制器10。
这种电压限制器10可以感测感测线SL的电压变化，并且可以将电压变化限制为参考电压。在开始感测操作之前，可将参考电压设定为等于或近似于初始值的值。
例如，在由于在显示面板200的通道CH中的某一通道CH的像素中出现缺陷而使得过电流Idamage流经感测线SL的情况下，电压限制器10可以将感测线SL的电压变化限制为参考电压，在感测操作开始之前，该参考电压被设定为等于或近似于初始值的值。
图2是示出根据实施例的显示驱动装置的示例的表示的框图，其中图1的电压限制器10由二极管配置。
参照图2，电压限制器10可以包括第一二极管D1和第二二极管D2。
在第一二极管D1中，阳极端子可以连接到感测线SL，并且阴极端子可以连接到参考电压VREF。
在第二二极管D2中，阴极端子可以连接到感测线SL，并且阳极端子可以连接到参考电压VREF。
在开始感测操作之前，可将参考电压VREF设定为等于或近似于初始值的值。
当感测线SL的电压变化大于第一二极管D1和第二二极管D2的阈值电压时，电压限制器10可以将感测线SL的电压变化限制为参考电压VREF。
以这种方式包括电压限制器10的显示驱动装置100可以在由于显示面板200的像素中出现缺陷而导致过电流Idamage流经的情况下，通过使第一二极管D1和第二二极管D2导通将感测线SL的电压电平限制为参考电压VREF。
因此，即使在由于像素中出现缺陷而导致过电流流经的情况下，包括上述电压限制器10的显示驱动装置100也可以最小化对相邻正常通道的数据值所施加的影响。
虽然这些实施例示出了由于在显示面板200的像素中出现缺陷而使过电流流经感测线SL的情况，但是应当注意，这些实施例不限于此。
即便是在由于静电放电而通过感测焊盘12将过电流引入感测线SL的情况下，根据本实施例的显示驱动装置100也可以通过使第一二极管D1和第二二极管D2导通将感测线SL的电压电平限制为参考电压VREF。
图3是示出根据实施例的显示驱动装置100的示例的表示的框图，其中图1的电压限制器10由比较器配置。
参照图3，电压限制器10可以包括第一比较器14、第二比较器16和运算器。例如，运算器可以包括或门(OR)元件18。
第一比较器14比较感测线SL的电压和第一参考电压VREFH，并向OR元件18提供第一比较信号。
第二比较器16比较感测线SL的电压和第二参考电压VREFL，并向OR元件18提供第二比较信号。
例如，第一参考电压VREFH和第二参考电压VREFL可以被设置为二极管的阈值电压。第一比较器14和第二比较器16可以通过感测感测线SL的电压具有小于二极管的阈值电压的电压变化幅度来输出逻辑低信号，并且可以在感测线SL的电压改变为等于或大于阈值电压的情况下输出逻辑高信号。
作为另一示例，第一参考电压VREFH和第二参考电压VREFL可以设置为小于二极管的阈值电压的电平。电压限制器10可以感测感测线SL的电压改变为等于或大于第一参考电压VREFH和第二参考电压VREFL的情况，从而可以输出复位信号，其中所述第一参考电压VREFH和第二参考电压VREFL被设定为小于二极管的阈值电压的电平。以这种方式，在该实施例中，电压限制器10可以配置为感测小于二极管的阈值电压的电压变化幅度。OR元件18可以对第一比较信号和第二比较信号执行OR逻辑函数，并且可以将复位信号SW_RST输出到复位电路19。
复位电路19响应于复位信号SW_RST将感测线SL初始化为复位电压。在开始感测操作之前，可将复位电压设定为等于或近似于初始值的值。例如，复位电路19可以使用电流-电压转换器20中的电路和复位电压。
在感测线SL的电压达到第一参考电压VREFH或第二参考电压VREFL以上的情况下，第一比较器14和第二比较器16使第一比较信号或第二比较信号为逻辑高。
响应于第一比较信号或第二比较信号，OR元件18使复位信号SW_RST为逻辑高。
复位电路19可响应于复位信号SW_RST将感测线SL初始化为复位电压。
以这种方式，在包括电压限制器10的显示驱动装置100中，在由于显示面板200的像素中出现缺陷而导致过电流Idamage流经的情况下，复位信号SW_RST可以被使能以在感测操作开始之前将感测线SL的电压电平初始化为等于或近似于初始值的值。
同时，显示驱动装置100可以包括内部电压产生电路(未示出)，该内部电压产生电路产生第一参考电压VREFH和第二参考电压VREFL。内部电压产生电路可产生多个内部电压，且可选择针对限制内部电压中的电压变化的操作而优化的内部电压作为第一参考电压VREFH和第二参考电压VREFL。
例如，内部电压产生电路可以通过使用解码器、电压参考和控制信号(诸如包)在多个内部电压之中选择适于显示面板200的特性的电压作为第一参考电压和第二参考电压。显示面板200的特性可以包括根据像素的诸如阈值电压和迁移率等特性的、感测线的正常电压变化幅度。
从以上描述中可以明显看出，在根据实施例的显示驱动装置100中，可以通过限制由于缺陷像素中出现的过电流而引起的突然的电压变化来最小化显示面板200的缺陷像素对正常通道的感测数据的影响。
此外，在根据实施例的显示驱动装置100中，由于可以预期正常补偿，所以可以改善图像质量方面的性能。
此外，在根据实施例的显示驱动装置100中，可以通过最小化在出现少量的缺陷像素时引起的图像质量下降来预期可靠性或生产率的提高。
虽然上面已经描述了各种实施例，但是本领域的技术人员将理解，所描述的实施例仅仅是示例性的。因此，不应基于所描述的实施例来限制本文所描述的公开内容。

Claims (19)

1.显示驱动装置，包括：
感测线，配置为感测显示面板的像素信号；以及
电压限制器，设置在每个所述感测线中，
其中，所述电压限制器感测所述感测线的电压变化，并且将所述感测线的电压电平限制为参考电压。
2.根据权利要求1所述的显示驱动装置，其中，所述电压限制器包括：
第一二极管，具有连接到所述感测线的阳极端子和连接到第一端子的阴极端子；以及
第二二极管，具有连接到所述感测线的阴极端子和连接到第二端子的阳极端子；
其中，所述参考电压施加到所述第一端子和所述第二端子。
3.根据权利要求2所述的显示驱动装置，其中，当所述感测线的电压变化大于所述第一二极管和所述第二二极管的阈值电压时，所述电压限制器将所述感测线的所述电压电平限制为所述参考电压。
4.根据权利要求1所述的显示驱动装置，其中，所述电压限制器将所述参考电压设定为初始值，所述感测线在初始化周期期间被初始化为所述初始值。
5.根据权利要求1所述的显示驱动装置，其中，所述电压限制器包括：
第一比较器，配置为比较所述感测线的电压与第一参考电压，并输出第一比较信号；
第二比较器，配置为比较所述感测线的所述电压和第二参考电压，并输出第二比较信号；以及
运算器，配置为通过对所述第一比较信号和所述第二比较信号执行逻辑函数来输出复位信号。
6.根据权利要求5所述的显示驱动装置，其中，所述运算器包括或门OR元件。
7.根据权利要求5所述的显示驱动装置，其中，所述电压限制器还包括：
复位电路，配置为响应于所述复位信号将所述感测线初始化为所述参考电压。
8.根据权利要求7所述的显示驱动装置，其中，在所述感测线的电压改变为等于或大于所述第一参考电压或所述第二参考电压的情况下，所述电压限制器输出所述复位信号。
9.根据权利要求5所述的显示驱动装置，其中，所述电压限制器将所述第一参考电压的电平和所述第二参考电压的电平设定为低于二极管的阈值电压，以便感测小于所述二极管的阈值电压的电压变化。
10.显示驱动装置，包括：
感测线，配置为感测显示面板的像素信号；以及
电压限制器，对应于每个所述感测线，并且配置为感测所述感测线的电压变化并且将所述感测线的电压电平限制为参考电压；
所述电压限制器包括：
第一二极管，具有连接到所述感测线的阳极端子和连接到第一端子的阴极端子，所述第一端子被施加所述参考电压；以及
第二二极管，具有连接到第二端子的阳极端子和连接到所述感测线的阴极端子，所述第二端子被施加所述参考电压。
11.根据权利要求10所述的显示驱动装置，其中，当所述感测线的电压变化大于所述第一二极管和所述第二二极管的阈值电压时，所述电压限制器将所述感测线的电平限制为所述参考电压。
12.根据权利要求10所述的显示驱动装置，其中，所述电压限制器将所述参考电压设定为初始值，所述感测线在初始化周期期间被初始化为所述初始值。
13.显示驱动装置，包括：
感测线，配置为感测显示面板的像素信号；以及
电压限制器，对应于每个所述感测线，并且配置为感测所述感测线的电压变化并且将所述感测线的电压电平限制为参考电压；
所述电压限制器包括：
第一比较器，配置为比较所述感测线的电压与第一参考电压，并输出第一比较信号；
第二比较器，配置为比较所述感测线的电压和第二参考电压，并输出第二比较信号；以及
运算器，配置为通过对所述第一比较信号和所述第二比较信号执行逻辑函数来输出复位信号。
14.根据权利要求13所述的显示驱动装置，其中，所述运算器包括或门OR元件。
15.根据权利要求13所述的显示驱动装置，其中所述电压限制器还包括：
复位电路，配置为响应于所述复位信号将所述感测线初始化为所述参考电压。
16.根据权利要求15所述的显示驱动装置，其中，在所述感测线的电压改变为等于或大于所述第一参考电压或所述第二参考电压的情况下，所述电压限制器输出所述复位信号。
17.根据权利要求13所述的显示驱动装置，其中，所述电压限制器将所述第一参考电压和所述第二参考电压设定为低于二极管的阈值电压的电平，以便感测小于所述二极管的阈值电压的电压变化。
18.如权利要求13所述的显示驱动装置，还包括：
内部电压产生电路，配置为产生多个内部电压，并将所述多个内部电压提供至所述电压限制器，
其中，所述多个内部电压中的至少一个被设定为所述第一参考电压和所述第二参考电压。
19.根据权利要求18所述的显示驱动装置，其中，所述内部电压产生电路在所述多个内部电压中选择对应于所述显示面板的特性的电压作为所述第一参考电压和所述第二参考电压。
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