Rapid scanning driving method for smectic liquid crystal display screen

Abstract

The invention discloses a rapid scanning driving method for a smectic liquid crystal display screen, comprising the following steps: (1) initializing a smectic liquid crystal display screen: clearing the image displayed on the smectic liquid crystal display screen and enabling the smectic liquid crystal display screen to be white; (2) enabling the smectic liquid crystal display screen to display the image obscurely: carrying out the scanning driving from the first row to the Mth row in turn, applying a second high-frequency high-voltage positive and negative pulse to each row of row electrodes, and applying corresponding column driving pulse to all the column electrodes according to gray scale information of the image displaced by the row while applying the second high-frequency high-voltage positive and negative pulse to the row; and (3) enabling the smectic liquid crystal display screen to display the image clearly: respectively applying a pair of third high-frequency high-voltage positive and negative pulses with the same frequency, the same voltage amplitude and the reverse phases to the M row columns and the N column electrodes, and stopping applying the third high-frequency high-voltage positive and negative pulses after a preset time. Compared with the traditional progressive scanning driving way, the rapid scanning driving method for the smectic liquid crystal display screen can greatly improve the image refresh rate under the premise of realizing the same image display effect.

Description

technical field [0001] The invention relates to a scanning driving method, in particular to a fast scanning driving method applied to a smectic liquid crystal display. Background technique [0002] Liquid crystal display is one of the most promising flat panel display devices at present. Traditional liquid crystal displays are passive displays, that is, transmissive displays, which can only be displayed under the condition of an external backlight, but the power consumption of the backlight is the liquid crystal itself. More than hundreds of times the power consumption, very energy-consuming. With the development of liquid crystal technology, various liquid crystal materials emerge in an endless stream, among which the reflective liquid crystal that does not require a backlight has an absolute advantage due to its low power consumption characteristics. The smectic liquid crystal display in the Chinese utility model patent "a display control circuit" (patent number ZL2007201...

AI Technical Summary

Problems solved by technology

It can be seen from the formula T=M×KT×1 / FT that for a fixed display screen, M and FT sub> is fixed, therefore, the image refresh time T is limited by the number of pulse pairs KT

In order to refresh the image to the expected grayscale state, the number of pulse pairs KT must be kept above a certain number, so that the image refresh time T will be very large and the image refresh speed will be very slow

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