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:
Oct. 21, 2003
Filed:
Aug. 27, 2001
Hidetoshi Watanabe, Kobe, JP;
Takeo Kamiya, late of Kobe, JP;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The liquid crystal driving circuit device has AC generating means ( ) for generating an alternating current component of a drive signal, a capacitive element ( ) with one terminal connected with said AC generating means, current limitation means ( ) with one terminal connected with the other terminal of the capacitive element ( ), and DC generating means ( ), for generating a direct current component of the drive signal, said DC generating means having an output connected to another terminal of the current limitation means ( ). The capacitive element ( ) eliminates the direct current component of an output signal from the AC generating means ( ), and the current limitation means ( ) limits a current caused by a voltage difference between a voltage at the other terminal of the capacitive element ( ) and a voltage at the output. Further, an amplitude value of the alternating current component from the AC generating means and an amplitude of the alternating current component of a signal from the DC generating means ( ) are approximately the same.