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Gamma curve adjusting method and device of TFT-LCD

An adjustment method and a technology for adjusting devices, which are applied to instruments, static indicators, etc., can solve problems such as unsteady Gamma curves, display color shift brightness, abnormalities, etc., to improve color shift phenomena or brightness abnormalities, improve stability, Eliminates the effect of slope polarity changes

Active Publication Date: 2014-04-30
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The unsteady Gamma curve obtained after correction will cause color cast or abnormal brightness on the display

Method used

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  • Gamma curve adjusting method and device of TFT-LCD
  • Gamma curve adjusting method and device of TFT-LCD
  • Gamma curve adjusting method and device of TFT-LCD

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Embodiment Construction

[0032] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0033] Such as Figure 4a and 4b , which shows the principle of eliminating the uneven areas that appear in the Gamma curve.

[0034] Firstly, the acquisition of the Gamma curve is introduced. according to figure 1 In the method shown, the grayscale voltage value (V 0 ~V n ) to the source drive circuit 102 (Source IC), and the source drive circuit 102 drives the TFT-LCD to display the corresponding gray...

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Abstract

The invention discloses a Gamma curve adjusting method and device of a TFT-LCD. The method includes the following steps that gray scale images displayed by the TFT-LCD to be measured under a series of specific gray scale voltages are captured; gray scale information corresponding to the images is calculated according to the captured gray scale images, and then a Gamma curve is obtained; uneven areas in the Gamma curve are determined based on the gray scale information of every two adjacent gray scale voltages; the depth of the uneven areas is calculated; the amplitude of any of every two adjacent gray scale voltages or the amplitude of every two adjacent gray scale voltages is further adjusted based on the depth, and then the Gamma curve between every two adjacent gray scale voltages is made to be even. By the adoption of the Gamma curve adjusting method and device, the stable degree of the Gamma curve can be improved and adjusted, and therefore the display color cast phenomenon or the brightness abnormal phenomenon is eliminated.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a method and device for adjusting a Gamma curve of a TFT-LCD liquid crystal screen. Background technique [0002] For liquid crystal displays (Liquid Crystal Display, LCD), the input voltage signal will produce brightness output on the screen, but the brightness of the liquid crystal is not proportional to the input voltage signal, there is a distortion, if the input is a black and white image signal, this distortion It will make the middle tone of the displayed image darker, so that the overall image is darker than the original scene. Gamma is the measurement parameter of this distortion. However, no matter what brand of liquid crystal, due to the consistency of physical principles, its gamma value is almost a constant. [0003] Due to the existence of Gamma distortion, the image represented by the input voltage signal will be darker than the original image when ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3611G09G3/2007G09G2320/0242G09G2320/0276
Inventor 许神贤
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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