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:
Jun. 05, 2007
Filed:
Jun. 21, 2005
Yasuyuki Kudo, Kamakura, JP;
Akihito Akai, Yokohama, JP;
Kazuo Ookado, Kokubunji, JP;
Kazunari Kurokawa, Mobara, JP;
Atsuhiro Higa, Yokohama, JP;
Yasuyuki Kudo, Kamakura, JP;
Akihito Akai, Yokohama, JP;
Kazuo Ookado, Kokubunji, JP;
Kazunari Kurokawa, Mobara, JP;
Atsuhiro Higa, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A display drive circuit for outputting a gray scale voltage according to display data includes a generation circuit generating gray scale voltages of a plurality of levels, and a selection circuit which selects a gray scale voltage according to the display data. When the number of colors to be displayed is small, the generation circuit decreases a current flowing into an internal circuit which generates a gray scale voltage of an intermediate level other than two gray scale voltages of a gray scale voltage of the most lowest level and a gray scale voltage of the most highest level among the gray scale voltages of the plurality of levels, and the selection circuit selects the gray scale voltage according to the display data from the most lowest level gray scale voltage and the most highest level gray scale voltage which are generated.