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CN105895044B - 液晶显示器及改善液晶显示器的大视角色偏的方法 - Google Patents

液晶显示器及改善液晶显示器的大视角色偏的方法 Download PDF

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CN105895044B
CN105895044B CN201610404582.9A CN201610404582A CN105895044B CN 105895044 B CN105895044 B CN 105895044B CN 201610404582 A CN201610404582 A CN 201610404582A CN 105895044 B CN105895044 B CN 105895044B
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gamma value
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corresponding gamma
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CN105895044A (zh
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曾德康
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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    • 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
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    • 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
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    • 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
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    • 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
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    • 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
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

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  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)

Abstract

提供一种液晶显示器及改善液晶显示器的大视角色偏的方法。所述液晶显示器包括：时序控制器，用于将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路；数据源驱动集成电路，用于根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压；液晶面板，基于提供给所述每个像素的灰阶电压来显示所述待显示的帧图像，其中，所述待显示的帧图像对应的伽马值不同于相邻的帧图像对应的伽马值。根据所述液晶显示器及改善液晶显示器的大视角色偏的方法，能够在不提高产品成本、不降低液晶面板的穿透率的情况下，降低大视角的色偏，从而增大液晶显示器的观看视角。

Description

液晶显示器及改善液晶显示器的大视角色偏的方法
技术领域
本发明总体说来涉及液晶显示器技术领域，更具体地讲，涉及一种改善大视角色偏的液晶显示器及方法。
背景技术
近年来，液晶显示器(LCD)以其体积小、重量轻、显示质量高等优点逐渐替代了以往的阴极射线显像管(CRT)显示器。然而，液晶显示器存在一个固有的缺陷，即当观看视角(view angle)变大时，每个像素的光学亮度曲线无法符合伽马(gamma)值为2.2，从而出现颜色漂移(color shift)的现象，观看视角越大，颜色漂移现象就越明显。图1示出在不同视角下的光学亮度曲线，可以看出，在0°视角时，像素的光学亮度曲线的gamma值为2.2，而在30°视角及60°视角时像素的光学亮度曲线的gamma值越来越远离2.2。
针对大视角色偏问题，目前一般通过下述方式解决：将液晶面板的显示矩阵(array)中的每个像素分为2个区，即主子像素区域(master area)和次子像素区域(slavearea)，通过在同一时刻对2个区提供不同的灰阶电压，使得2个区的液晶偏转角度不一样，从而光学亮度曲线的gamma值不同。当观看视角变大时，虽然会导致master区和slave区的光学亮度曲线的gamma值发生变化，但两者中和后会使得整个像素的光学亮度曲线的gamma值接近于2.2，从而改善大的观看视角下的色偏问题。虽然通过上述方式改善了色偏问题，但需要额外增加扫描线(scan line)、数据线(data line)和薄膜晶体管(TFT)，一方面产品成本增高，另一方面使得液晶面板的开口率变小，降低了液晶面板的穿透率。
发明内容
本发明的示例性实施例在于提供一种液晶显示器及改善液晶显示器的大视角色偏的方法，以克服现有的降低大视角色偏的方式提高了产品成本、降低了液晶面板的穿透率的问题。
根据本发明的示例性实施例，提供一种液晶显示器，其特征在于，包括：时序控制器，用于将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路；数据源驱动集成电路，用于根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压；液晶面板，用于基于提供给所述每个像素的灰阶电压来显示所述待显示的帧图像，其中，所述待显示的帧图像对应的伽马值不同于相邻的帧图像对应的伽马值。
可选地，所述待显示的帧图像对应的伽马值不同于所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值，并且，所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值相同。
可选地，数据源驱动集成电路包括：接收器，用于从时序控制器接收包括待显示的帧图像对应的伽马值的数据并解析出所述待显示的帧图像对应的伽马值；伽马模块，根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压；数模转换器，将生成的用于提供给所述每个像素的灰阶电压转换成模拟电压。
可选地，时序控制器利用信号传输协议将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路。
可选地，所述信号传输协议是P2P传输协议。
根据本发明的另一示例性实施例，提供一种改善液晶显示器的大视角色偏的方法，其特征在于，包括：(A)时序控制器将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路；(B)数据源驱动集成电路根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压；(C)液晶面板基于提供给所述每个像素的灰阶电压来显示所述待显示的帧图像，其中，所述待显示的帧图像对应的伽马值不同于相邻的帧图像对应的伽马值。
可选地，所述待显示的帧图像对应的伽马值不同于所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值，并且，所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值相同。
可选地，步骤(B)包括：(b1)接收器从时序控制器接收包括待显示的帧图像对应的伽马值的数据并解析出所述待显示的帧图像对应的伽马值；(b2)伽马模块根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压；(b3)数模转换器将生成的用于提供给所述每个像素的灰阶电压转换成模拟电压。
可选地，时序控制器利用信号传输协议将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路。
可选地，所述信号传输协议是P2P传输协议。
根据本发明示例性实施例的液晶显示器及改善液晶显示器的大视角色偏的方法，能够在不提高产品成本、不降低液晶面板的穿透率的情况下，降低大视角的色偏，从而增大液晶显示器的观看视角。
将在接下来的描述中部分阐述本发明总体构思另外的方面和/或优点，还有一部分通过描述将是清楚的，或者可以经过本发明总体构思的实施而得知。
附图说明
图1示出在不同视角下的光学亮度曲线；
图2示出根据本发明示例性实施例的液晶显示器的结构框图；
图3示出根据本发明示例性实施例的数据源驱动集成电路的结构框图；
图4示出根据本发明示例性实施例的改善液晶显示器的大视角色偏的方法的流程图；
图5示出根据本发明示例性实施例的生成灰阶电压的方法的流程图。
具体实施方式
现将详细参照本发明的实施例，所述实施例的示例在附图中示出，其中，相同的标号始终指的是相同的部件。以下将通过参照附图来说明所述实施例，以便解释本发明。
图2示出根据本发明示例性实施例的液晶显示器的结构框图。如图2所示，根据本发明示例性实施例的液晶显示器包括：时序控制器10、数据源驱动集成电路20和液晶面板30。
这里，应该理解，根据本发明示例性实施例的液晶显示器除具有时序控制器10、数据源驱动集成电路20和液晶面板30之外，还可具有其作为液晶显示器执行其自身功能所必须的其他器件，本发明对此不作限制。
具体说来，时序控制器10(Timing controller,TCON)用于将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路20。
作为示例，时序控制器10可利用信号传输协议将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路20。优选地，所述信号传输协议可以是P2P传输协议。例如，所述P2P传输协议可以是三星主导的USI-T协议、LG主导的ISP协议、Novatek主导的PHI协议等。
数据源驱动集成电路20(Source IC)用于根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板30的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压，其中，所述待显示的帧图像对应的伽马值不同于相邻的帧图像对应的伽马值。即，所述待显示的帧图像对应的伽马值与其上一帧图像所对应的伽马值和其下一帧图像所对应的伽马值均不同。
优选地，所述待显示的帧图像对应的伽马值不同于所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值，并且，所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值相同。具体说来，从第一帧图像开始，奇数帧图像对应的伽马值相同(例如，为第一伽马值)，偶数帧图像对应的伽马值相同(例如，为第二伽马值)，但第一伽马值和第二伽马值不同。这里，第一伽马值和第二伽马值可根据实际情况进行设置，例如，可根据实际测量和调试情况来设置第一伽马值和第二伽马值，例如，第一伽马值可为1.8、第二伽马值可为2.3。
液晶面板30用于基于提供给所述每个像素的灰阶电压来显示所述待显示的帧图像。
图3示出根据本发明示例性实施例的数据源驱动集成电路的结构框图。如图3所示，根据本发明示例性实施例的数据源驱动集成电路20可包括：接收器201、伽马模块202和数模转换器203。
这里，应该理解，根据本发明示例性实施例的数据源驱动集成电路20除具有接收器201、伽马模块202和数模转换器203之外，还可具有其作为液晶显示器的数据源驱动集成电路执行其自身功能所必须的其他器件，本发明对此不作限制。
具体说来，接收器201用于从时序控制器接收包括待显示的帧图像对应的伽马值的数据并从接收到的数据中解析出所述待显示的帧图像对应的伽马值。
伽马模块202根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板30的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压。
数模转换器203(DAC)将生成的用于提供给所述每个像素的灰阶电压转换成模拟电压。
在根据本发明的示例性实施例的液晶显示器中，时序控制器10在即将显示一帧图像时，将与该帧图像对应的伽马值发送到数据源驱动集成电路20，从而数据源驱动集成电路20可根据该帧图像对应的伽马值来向液晶面板30中的各个像素提供相应的灰阶电压以显示所述一帧图像。相应地，时序控制器10在即将显示所述一帧图像的下一帧图像时，将与该下一帧图像对应的伽马值发送到数据源驱动集成电路20，从而数据源驱动集成电路20可根据该下一帧图像对应的伽马值来向液晶面板30中的各个像素提供相应的灰阶电压以显示所述下一帧图像。由于所述一帧图像和所述下一帧图像所对应的伽马值不同，因此，液晶面板30在显示所述一帧图像和所述下一帧图像时，液晶面板30的同一位置处的像素的光学亮度曲线不同，而通过人眼视觉积分，正好将这两条光学亮度曲线中和出一条伽马值接近2.2的光学亮度曲线，从而降低了大视角色偏，并且，液晶面板30的刷新频率越高，降低大视角色偏的效果越明显。
此外，应该理解，上述器件在执行上述功能之外，还可执行其作为液晶显示器中的器件应该执行的其他功能。以时序控制器10为例，其除了将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路20之外，还可将所述待显示的帧图像中液晶面板30的每个像素对应的灰阶值发送到数据源驱动集成电路20。
根据本发明示例性实施例的液晶显示器，能够利用液晶显示器中现有的器件及P2P通信架构，无需增加额外的器件和技术支持，在不增加成本的同时，实现上更便捷。
图4示出根据本发明示例性实施例的改善液晶显示器的大视角色偏的方法的流程图。
如图4所示，在步骤S10，时序控制器将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路。
作为示例，时序控制器可利用信号传输协议将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路。优选地，所述信号传输协议可以是P2P传输协议。例如，所述P2P传输协议可以是三星主导的USI-T协议、LG主导的ISP协议、Novatek主导的PHI协议等。
在步骤S20，数据源驱动集成电路根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压，其中，所述待显示的帧图像对应的伽马值不同于相邻的帧图像对应的伽马值。即，所述待显示的帧图像对应的伽马值与其上一帧图像所对应的伽马值和其下一帧图像所对应的伽马值均不同。
优选地，所述待显示的帧图像对应的伽马值不同于所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值，并且，所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值相同。具体说来，从第一帧图像开始，奇数帧图像对应的伽马值相同(例如，为第一伽马值)，偶数帧图像对应的伽马值相同(例如，为第二伽马值)，但第一伽马值和第二伽马值不同。这里，第一伽马值和第二伽马值可根据实际情况进行设置，例如，可根据实际测量和调试情况来设置第一伽马值和第二伽马值，例如，第一伽马值可为1.8、第二伽马值可为2.3。
在步骤S30，液晶面板基于提供给所述每个像素的灰阶电压来显示所述待显示的帧图像。
图5示出根据本发明示例性实施例的生成灰阶电压的方法的流程图。
如图5所示，在步骤S201，接收器从时序控制器接收包括待显示的帧图像对应的伽马值的数据并解析出所述待显示的帧图像对应的伽马值。
在步骤S202，伽马模块根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压。
在步骤S203，数模转换器将生成的用于提供给所述每个像素的灰阶电压转换成模拟电压。
在根据本发明的示例性实施例的改善液晶显示器的大视角色偏的方法中，时序控制器在即将显示一帧图像时，将与该帧图像对应的伽马值发送到数据源驱动集成电路，从而数据源驱动集成电路可根据该帧图像对应的伽马值来向液晶面板中的各个像素提供相应的灰阶电压以显示所述一帧图像。相应地，时序控制器在即将显示所述一帧图像的下一帧图像时，将与该下一帧图像对应的伽马值发送到数据源驱动集成电路，从而数据源驱动集成电路可根据该下一帧图像对应的伽马值来向液晶面板中的各个像素提供相应的灰阶电压以显示所述下一帧图像。由于所述一帧图像和所述下一帧图像所对应的伽马值不同，因此，液晶面板在显示所述一帧图像和所述下一帧图像时，液晶面板的同一位置处的像素的光学亮度曲线不同，而通过人眼视觉积分，正好将这两条光学亮度曲线中和出一条伽马值接近2.2的光学亮度曲线，从而降低了大视角色偏，并且，液晶面板的刷新频率越高，降低大视角色偏的效果越明显。
根据本发明示例性实施例的改善液晶显示器的大视角色偏的方法，能够利用液晶显示器中现有的器件及P2P通信架构，无需增加额外的器件和技术支持，在不增加成本的同时，实现上更便捷。
根据本发明示例性实施例的液晶显示器及改善液晶显示器的大视角色偏的方法，能够在不提高产品成本、不降低液晶面板的穿透率的情况下，降低大视角的色偏，从而增大液晶显示器的观看视角。
虽然已表示和描述了本发明的一些示例性实施例，但本领域技术人员应该理解，在不脱离由权利要求及其等同物限定其范围的本发明的原理和精神的情况下，可以对这些实施例进行修改。

Claims (8)

1.一种液晶显示器，其特征在于，包括：
时序控制器，用于将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路；
数据源驱动集成电路，用于根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压；
液晶面板，用于基于提供给所述每个像素的灰阶电压来显示所述待显示的帧图像，
其中，所述待显示的帧图像对应的伽马值不同于相邻的帧图像对应的伽马值；
数据源驱动集成电路包括：
接收器，用于从时序控制器接收包括待显示的帧图像对应的伽马值的数据并解析出所述待显示的帧图像对应的伽马值；
伽马模块，根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压；
数模转换器，将生成的用于提供给所述每个像素的灰阶电压转换成模拟电压。
2.根据权利要求1所述的液晶显示器，其特征在于，所述待显示的帧图像对应的伽马值不同于所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值，并且，所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值相同。
3.根据权利要求1或2所述的液晶显示器，其特征在于，时序控制器利用信号传输协议将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路。
4.根据权利要求3所述的液晶显示器，其特征在于，所述信号传输协议是P2P传输协议。
5.一种改善液晶显示器的大视角色偏的方法，其特征在于，包括：
(A)时序控制器将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路；
(B)数据源驱动集成电路根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压；
(C)液晶面板基于提供给所述每个像素的灰阶电压来显示所述待显示的帧图像，
其中，所述待显示的帧图像对应的伽马值不同于相邻的帧图像对应的伽马值；
步骤(B)包括：
(b1)接收器从时序控制器接收包括待显示的帧图像对应的伽马值的数据并解析出所述待显示的帧图像对应的伽马值；
(b2)伽马模块根据所述待显示的帧图像对应的伽马值和所述待显示的帧图像中液晶面板的每个像素对应的灰阶值，生成用于提供给所述每个像素的灰阶电压；
(b3)数模转换器将生成的用于提供给所述每个像素的灰阶电压转换成模拟电压。
6.根据权利要求5所述的方法，其特征在于，所述待显示的帧图像对应的伽马值不同于所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值，并且，所述待显示的帧图像的上一帧图像对应的伽马值和所述待显示的帧图像的下一帧图像对应的伽马值相同。
7.根据权利要求5或6所述的方法，其特征在于，时序控制器利用信号传输协议将包括待显示的帧图像对应的伽马值的数据发送到数据源驱动集成电路。
8.根据权利要求7所述的方法，其特征在于，所述信号传输协议是P2P传输协议。
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CN105182649A (zh) * 2015-10-29 2015-12-23 深圳市华星光电技术有限公司 广视角面板和显示装置

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