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. 18, 2014
Filed:
Sep. 12, 2012
Kazunari Tomizawa, Osaka, JP;
Tomohiko Mori, Osaka, JP;
Shun Ueki, Osaka, JP;
Takao Muroi, Osaka, JP;
Kazunari Tomizawa, Osaka, JP;
Tomohiko Mori, Osaka, JP;
Shun Ueki, Osaka, JP;
Takao Muroi, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A signal conversion circuit is disclosed which is suitably used in a multiprimary liquid crystal display device, and a multiprimary liquid crystal display device having such a signal conversion circuit. A signal conversion circuit according to one embodiment of the present invention is for use in a multiprimary liquid crystal display device, and converts an input video signal to a multiprimary signal corresponding to four or more primary colors. When generating a multiprimary signal for displaying dark skin, the signal conversion circuit according to an embodiment of the present invention applies a conversion to the video signal so that a color difference Δu'v′=((u′−u′)+(v′−v′)) is 0.03 or less, the color difference Δu′v′ being defined by CIE1976 chromaticity coordinates (u′, v′) representing a chromaticity when the pixel is viewed from the frontal direction and CIE1976 chromaticity coordinates (u′, v′) representing a chromaticity when the pixel is viewed from a 60° oblique direction.