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. 28, 2014
Filed:
Jan. 07, 2010
Akihiko Inoue, Osaka, JP;
Akihiko Inoue, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A gradation change detection circuit determines whether a gradation value has been changed from a previous frame. In at least one example embodiment, a first frame memory stores, when the gradation value is changed, a gradation value before change. A hold count calculation circuit determines a hold count indicating the number of frames inputted after the change of the gradation value. A second frame memory stores the determined hold counts. An emphasis conversion circuit performs a process of emphasizing a change in gradation value on a video signal, and makes a degree of emphasis smaller with a larger hold count. A liquid crystal panel is driven based on a video signal obtained by an overdrive circuit. By this, double optical responsivity occurring due to overdrive drive is prevented.