Patent ID: 7425940

Claim:
A liquid crystal pixel memory comprising: first and second power terminals that are set at potentials of opposite polarities, respectively, each of the potentials having a predetermined level difference relative to a reference potential; first and second pixel electrodes that retain charges supplied from the first and second power terminals, respectively, and apply a potential difference obtained by the retained charges to a liquid crystal layer as a liquid crystal drive voltage that creates within the liquid crystal layer a lateral electric field that is substantially horizontal to a plane of a substrate; an input transistor having source and drain electrodes and a gate electrode connected to a video signal line; a pair of first switch transistors that are connected between the first pixel electrode and the first power terminal and between the second pixel electrode and the second power terminal, respectively, to precharge the first and second pixel electrodes at the potentials of the first and second power terminals; and a pair of second switch transistors that are connected between the source electrode of the input transistor the first pixel electrodes and between the drain electrode of the input transistor and the second pixel electrode, respectively, to redistribute the charges retained in the first and second pixel electrodes in accordance with a value of a video signal that is input to the gate electrode of the input transistor.