Circuits and methods for compensating voltage drop in the common electrode for active matrix liquid crystal displays

摘要

Thin film transistor-liquid crystal displays (TFT-LCDs) are driven to compensate for voltage drops on a common electrode, and to thereby reduce or eliminate crose-talk. The TFT-LCD includes a plurality of liquid crystal cells and a plurality of thin film transistors, a respective pair of which is serially connected between a common electrode and a plurality of drivers. A sensor senses a voltage drop on the common electrode. A compensator is responsive to the sensor, to provide at least one driver signal level to the plurality of drivers, which are a function of the sensed voltage drop on the common electrode. Distortions in the liquid crystal cells which are caused by the voltage drop on the common electrode may thereby be reduced or eliminated. Improved TFT-LCDs and driving circuits and methods are thereby provided.