Sequential control circuit for reducing flickering of liquid crystal panel and relevant method of sequential control circuit

Abstract

The invention relates to a sequential control circuit for reducing flickering of a liquid crystal panel. The sequential control circuit comprises a sensing unit and a data mapping unit, wherein the sensing unit is used for sensing a picture rate corresponding to an input signal; when the picture rate corresponding to the input signal is switched into a second picture rate from a first picture rate, the data mapping unit obtains a second brightness corresponding to the second picture rate and approximate to a first brightness corresponding to the first picture rate according to a dithering method and an information mapping table; and after the data mapping unit obtains the second brightness, the liquid crystal panel displays a picture according to the second brightness and the second picture rate.

Description

technical field [0001] The present invention relates to a timing control circuit, especially a timing control circuit for reducing the flickering of a liquid crystal panel according to a color dithering method and a data mapping table. Background technique [0002] Please refer to figure 1 and figure 2 , figure 1 is a schematic diagram illustrating a pixel 100 in a liquid crystal panel, and figure 2 It is a schematic diagram illustrating the difference in actual luminance of different frame rates when the frame rate is switched between 60Hz and 40Hz. Such as figure 1 As shown, the pixel 100 includes a switch 102, a storage capacitor CS and a liquid crystal capacitor CLC, wherein the switch 102 is coupled to a data line DL, a scan line SL, the storage capacitor CS and the liquid crystal capacitor CLC; the storage capacitor CS is coupled to Connected to a common electrode line, switch 102, and liquid crystal capacitor CLC; the liquid crystal capacitor CLC is coupled to ...

AI Technical Summary

Problems solved by technology

[0011] After the LCD panel enables the function of Seamless Display Refresh Rate Switching (SDRRS), if the frame rate is switched from 60Hz to 40Hz, due to the difference in charging time of the CS capacitor (T 60 40 ), so that the charging voltage of the CS capacitor is different (V 60 40 ), resulting in differences in actual luminance when displaying pictures on the LCD panel (such as figure 2 Shown) and there is a flickering problem

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