Driving method for full-screen gray scale correction of smectic liquid crystal display

Abstract

The invention discloses a driving method for full-screen gray scale correction of a smectic liquid crystal display. The driving method comprises the steps of: initializing; dividing row regions and subregions; generating a row region comparison table, a row region sub-field pulse pair number table, a row region sub-field frequency table, a subregion comparison table and a subregion gray scale value mapping table; selecting a scanning mode, and carrying out row scanning on the smectic liquid crystal display according to the row scanning sequence specified in the scanning sequence array corresponding to the scanning mode. According to the method disclosed by the invention, the output sub-field number, pulse pair number and frequency of row pulse voltage as well as the phase of line pulse voltage are modulated by full-screen region division and various tables which are generated according to the divided regions and are used for building the row and line pulse voltages, thereby realizing the correction on gray scale states of each pixel points on the full screen, improving the regional nonuniformity and inconsistency of the identical gray scale of image display of the display, and avoiding the image distortion phenomenon.

Description

technical field [0001] The invention relates to a scanning driving method, in particular to a full-screen gray scale correction driving method applied to a smectic liquid crystal display. Background technique [0002] At present, the scanning driving method for image refreshment of smectic liquid crystal display is to adopt the consistent scanning driving method row by row in the whole screen, from the first row closest to the column pulse voltage driving circuit to the furthest away from the column pulse voltage driving circuit. The last row of the row pulse voltage is applied sequentially. When a row is scanned, the set row pulse voltage is applied to the row electrode corresponding to the row. At the same time, according to the grayscale value of the image to be displayed in the row, the corresponding Corresponding column pulse voltages are respectively applied to the column electrodes. [0003] Although this progressive scan driving method is simple and easy to implemen...

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Problems solved by technology

If the row pulse of the same waveform is used to scan and drive all the rows of the display screen, the displayed image will have regional unevenness in the vertical direction

[0007] In addition, the optical characteristics of the display itself also have inhomogeneity. Therefore, in actual implementation, the above phenomenon and the optical characteristics of the display itself will lead to the actual driving state of multiple pixels with the same pre-displayed grayscale value at different positions on the display screen. There is a difference from the displayed grayscale effect, resulting in inconsistent display effects of the same grayscale in the full screen

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