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:
Jan. 24, 2012
Filed:
May. 01, 2007
Applicant:
Shigeru Harada, Tokyo, JP;
Inventor:
Shigeru Harada, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/52 (2006.01); H04N 5/57 (2006.01); H04N 5/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image correction circuit capable of preventing a loss of gray levels in a luminance region at the time of the direct current level conversion of a luminance signal to improve the quality of a displayed image. The image correction circuit detects an average peak level of input image data in each image frame, and corrects the input image data to lower the luminance of input image data in an intermediate luminance region according to the average peak level while reducing the luminance of input image data at a predetermined rate in at least of a low luminance region.