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Gamma curve adjustment method and its gamma voltage generator and display device

A technology for display devices and adjustment methods, applied to instruments, static indicators, etc., can solve problems such as poor image quality, and achieve the effect of increasing contrast and image quality

Active Publication Date: 2016-12-28
深圳易加仁技术有限公司
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Problems solved by technology

[0009] However, since the grayscale values ​​of multiple sub-pixels of the picture may be concentrated in a specific range of values, if the gamma curve or the gamma reference voltage V cannot be dynamically adjusted GMA_1 ~V GMA_N , will sacrifice the contrast of the picture, and make the image quality less good

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  • Gamma curve adjustment method and its gamma voltage generator and display device
  • Gamma curve adjustment method and its gamma voltage generator and display device
  • Gamma curve adjustment method and its gamma voltage generator and display device

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Embodiment Construction

[0038] [Example of Gamma Curve Adjustment Method]

[0039] Please refer to image 3 , image 3 It is a flowchart of a gamma curve adjustment method according to an embodiment of the present invention. The gamma curve adjustment method is used in a display control system, which is implemented by means of hardware or software and hardware, and the display control system is used in a backlight or self-luminous display device, such as a liquid crystal display device or an organic light emitting diode display device.

[0040] First, in step S301, the gray scale value distribution of each pixel of the screen is analyzed by the control circuit of the display control system (such as a timing controller) or the front-end operating system to obtain the gray scale value distribution of each sub-pixel of each color, That is, the statistical quantity and the statistical ratio of the sub-pixel grayscale values ​​of the frame falling within each preset interval are counted. For example, t...

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Abstract

The invention discloses a gamma curve adjustment method and its gamma voltage generator and a display device. The method is used in a display control system of the display device, and includes the following steps: analyzing the gray levels of each sub-pixel of each color of the screen Value distribution; and adjusting at least one gamma reference voltage according to the distribution of sub-pixel grayscale values ​​of the color, so that the plurality of sub-pixel grayscales in at least one preset interval of the one with a relatively larger statistical number or a relatively larger ratio The number of grayscales and grayscale voltages corresponding to the value is increased, and the number of grayscales and grayscales corresponding to multiple subpixel grayscale values ​​in at least one preset interval of the one whose statistical quantity is relatively small or the ratio is relatively small The number of voltages is reduced.

Description

technical field [0001] The present invention relates to a display device, and in particular to a gamma curve adjustment method and a gamma voltage generator for a display control system. Background technique [0002] Currently, display technology is developing rapidly, and liquid crystal display (LCD) devices are widely used as image output devices of various electronic devices. The liquid crystal molecules in the liquid crystal display device are deflected by the applied voltage to control the light transmittance of the corresponding sub-pixels. [0003] Please refer to figure 1 , figure 1 It is a partial block diagram of a traditional display control system. At figure 1 Among them, the gamma voltage generator 11 in the traditional display control system receives a system voltage AVDD, and generates a plurality of gamma reference voltages V GMA_1 ~V GMA_N . Next, the grayscale and grayscale voltage generator 122 of the source driver circuit 12 in the conventional dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20
Inventor 刘鸿达
Owner 深圳易加仁技术有限公司
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