The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 2003
Filed:
Feb. 10, 2000
Hideo Sato, Hitachi, JP;
Yoshiro Mikami, Hitachiota, JP;
Makoto Tsumura, Hitachi, JP;
Genshiro Kawachi, Mobara, JP;
Tatsuya Ohkubo, Akashi, JP;
Shigeo Shimomura, Mobara, JP;
Kenkichi Suzuki, Mobara, JP;
Masanao Yamamoto, Mobara, JP;
Other;
Abstract
A drive circuit for a liquid crystal display apparatus and a large-sized liquid crystal display apparatus integrated with the drive circuit and having a reduced area occupied by the circuits. The drive circuit includes sample/hold circuits for sampling the input voltage at a predetermined timing, comparator circuits for comparing the output of the sample/hold circuits with the voltage of the signal line VD(i), switches for controlling the output voltage of the signal line, a voltage supply circuit constituted as an image signal control circuit for supplying a voltage to the switches, and control circuits for controlling the switches in accordance with the output of the comparator circuits. For the liquid crystal display panel drive circuit configured as described above, the signal line is controlled by the switches, and therefore the area occupied by the drive circuits can be reduced.