A frequency amplitude variation driving method for smectic liquid crystal screen

Abstract

The invention discloses a frequency-amplitude variation driving method for a smectic phase liquid crystal screen. The method uses voltage amplitudes of a pair of row and column pulse signals loaded on two conductive electrode layers of a smectic phase liquid crystal screen. And / or frequency design, so that the smectic phase liquid crystal screen displays an image, the display speed is fast and the power consumption is low. Among them, the frequency of the n pulse groups of the row pulse signal changes in a way of gradually increasing and then decreasing, the voltage amplitude changes in a way of gradually decreasing and then increasing, the frequency of the column pulse signal and the row pulse signal are the same, the pulse The number of pairs is the same, the phases are opposite, the voltage amplitudes are the same or different, and the voltage amplitudes of the n pulse groups of the column pulse signal also change in a gradually decreasing and then increasing manner.

Description

technical field [0001] The invention relates to a driving method for a smectic liquid crystal screen, especially a fast and low power consumption driving method applied to a display screen made of a smectic liquid crystal by adjusting frequency and voltage. Background technique [0002] At present, smectic liquid crystal screens have great application demands in construction, automobile, electronics and other fields. The smectic liquid crystal screen mainly uses smectic liquid crystal mixed with additives with conductive properties, and controls the liquid crystal molecules to show different alignment states through electrical signals, so that the screen as a whole switches between foggy shading and fully transparent states, even in Switch between various progressive states of different gray scales, and this kind of screen can maintain the state at power-on in the power-off state, that is, the multi-stable characteristic. [0003] For the above-mentioned smectic phase liqui...

AI Technical Summary

Problems solved by technology

However, for the driving of the emptying operation or the grinding operation, the traditional driving method adopts fixed voltage amplitude and fixed voltage frequency (a certain frequency in the high frequency during the emptying operation, and a certain frequency in the low frequency during the grinding operation) ) signal drive mode, so in order to achieve the desired display effect, problems such as too long drive time and excessive drive power consumption often occur

Images