Invention Grant
- Patent Title: Image display apparatus and alternative current drive method
- Patent Title (中): 图像显示装置和替代电流驱动方法
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Application No.: US11043259Application Date: 2005-01-27
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Publication No.: US07733317B2Publication Date: 2010-06-08
- Inventor: Toshiharu Murai , Kazuhiro Fujita , Kenji Kameyama , Toshiaki Tokita , Yasuyuki Takiguchi
- Applicant: Toshiharu Murai , Kazuhiro Fujita , Kenji Kameyama , Toshiaki Tokita , Yasuyuki Takiguchi
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2004-025175 20040202
- Main IPC: G09G3/36
- IPC: G09G3/36

Abstract:
A reliable image display apparatus is provided that is capable of preventing a direct current from being applied to liquid crystal of a spatial light modulating element so that damage such as burns in the liquid crystal and screen flicker may be prevented and a high resolution image with high image quality may be displayed. The image display apparatus is configured to divide a frame into 2i sub frames (i corresponding to a natural number) and sequentially display the sub frames using the liquid crystal spatial light modulating element. The image display apparatus includes a polarity switching unit configured to reverse the polarity of a drive voltage for a pixel of the spatial light modulating element for every j sub frame(s) (j corresponding to a natural number that is less than 2i) and for every n frame(s)(n corresponding to a natural number).
Public/Granted literature
- US20050168455A1 Image display apparatus and alternative current drive method Public/Granted day:2005-08-04
Information query
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