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:
Feb. 07, 2012
Filed:
Oct. 02, 2007
Daisaburou Nakai, Kanagawa, JP;
Yoshiharu Hashimoto, Kanagawa, JP;
Daisaburou Nakai, Kanagawa, JP;
Yoshiharu Hashimoto, Kanagawa, JP;
Renesas Electronics Corporations, Kanagawa, JP;
Abstract
In a drive circuit of a display apparatus in which a plurality of scanning lines and a plurality of data lines are orthogonalized, a first data latch circuit latches image data for every line in response to a horizontal signal. A decoder circuit decodes the latched image data. A gradation voltage selecting circuit selects voltage lines based on the decoded image data, to connect each of the plurality of data lines with any of the voltages lines. A data determining circuit generates determination signals based on the selected voltage lines such that each of a plurality of gradation amplifiers is selectively set to an inactive state based on the determination signal. A gradation amplifier circuit includes the plurality of gradation amplifiers, each of which amplifies a corresponding one of gradation voltages when being in an active state and does not amplify the corresponding gradation voltage when being in an inactive state, and the amplified gradation voltage being outputted on a corresponding one of the voltage lines. An output circuit drives the plurality of data lines based on the amplified gradation voltages on the voltage lines.