Liquid crystal display apparatus

申请公布号：

US2003156089(A1)

申请号：

US20030366762

申请日期：

2003.02.14

申请公布日期：

2003.08.21

申请人：

MINOLTA CO., LTD.

发明人：

YAMAKAWA EIJI;MASAZUMI NAOKI

分类号：

G02F1/139;G02F1/133;G02F1/1333;G02F1/1347;G02F1/137;G09G3/20;G09G3/36;(IPC1-7):G09G3/36

主分类号：

G02F1/139

摘要：

This invention is directed to a liquid crystal display apparatus which comprises a liquid crystal display element, and a driving device for driving the display element by simple matrix driving. The display element includes a liquid crystal layer exhibiting a cholesteric phase, and has scanning electrodes and signal electrodes. The driving device is configured such that a driving voltage of single polarity including a selection signal voltage is applied to the scanning electrodes in each frame, and the polarity of the driving voltage is reversed in every frame. The scanning electrodes are successively brought to a selected state by applying the selection signal voltage to each scanning electrode in a scanning period set for the scanning electrode, while a rewriting signal voltage corresponding to each scanning electrode in the selected state is applied to each signal electrode. An application period of the selection signal voltage to the scanning electrode is ½ the scanning period.