Patent ID: 8120565
Filing Date: 2012-02-21
Classification: G09G

Abstract:
1. A drive circuit for driving a display device comprising electro-optical material disposed between a common electrode and an array of pixel electrodes, said drive circuit comprising: pixel drive circuits connected to respective ones of the pixel electrodes and operable to generate respective pixel drive signals alternating between a first high voltage and a first low voltage differing in voltage by less than or equal to a process-limited maximum; and a common drive circuit connected to the common electrode and operable to generate a common drive signal alternating between a second high voltage and a second low voltage differing in voltage by more than the process-limited maximum, the common drive signal being asymmetrically bipolar with respect to the first low voltage, wherein the first low voltage and the second low voltage differ in voltage by less than or equal to a threshold voltage at which an electro-optical response is produced by the electro-optical material.