| US 7,468,719 B2 | ||
| Liquid crystal pixel memory, liquid crystal display, and methods of driving the same | ||
| Genshiro Kawachi, Yokohama (Japan) | ||
| Assigned to Advanced LCD Technologies Development Center Co., Ltd., Yokohama (Japan) | ||
| Filed on Jan. 28, 2005, as Appl. No. 11/44,350. | ||
| Claims priority of application No. 2004-032440 (JP), filed on Feb. 09, 2004. | ||
| Prior Publication US 2005/0174313 A1, Aug. 11, 2005 | ||
| Int. Cl. G09G 3/36 (2006.01) | ||
| U.S. Cl. 345—98 [345/55; 345/204; 345/205] | 15 Claims |
| 1. A liquid crystal pixel memory, comprising:
first and second power terminals;
first and second pixel electrodes that apply a liquid crystal drive voltage to a liquid crystal layer to create a substantially
lateral electric field in the liquid crystal layer;
first and second drive transistors that have gate electrodes that receive a video signal, that are connected between the first
power terminal and the first pixel electrode and between the second power terminal and the second pixel electrode, respectively,
and that cause the liquid crystal drive voltage determined by conductances that vary in accordance with the video signal,
to be retained in a liquid crystal capacitance between the first and second pixel electrodes; and
a switch section that is driven to change voltages applied to the first and second power terminals such that a polarity of
the liquid crystal drive voltage is cyclically reversed.
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