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:
Mar. 01, 2011
Filed:
Jul. 11, 2007
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 generation circuit generates gray scale voltages having a plurality of levels for positive polarity and gray scale voltages having a plurality of levels for negative polarity; wherein said generation circuit, in the mode in which the number of colors to be displayed on a display panel is small, 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 said plurality of levels, in comparison to a current flowing in the other mode; and wherein said selection circuit, in the mode in which the number of colors to be displayed on said display panel is small, selects said gray scale voltage according to said display data, from the two gray scale voltages of said most lowest level gray scale voltage and said most highest level gray scale voltage which are generated from said generation circuit.