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:
Apr. 19, 1988
Filed:
Nov. 03, 1986
Mitsuo Seki, Daito, JP;
Keiichi Tanii, Ibaraki, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A circuit for performing white balance correction using two color temperature sensors includes an image sensor for converting an image of an object to a color image signal, a luminance signal/color signal separator for separating an output of the image sensor into a luminance signal and a color signal, and at least one level correction means for correcting a level of the color signal output from the luminance signal/color signal separator, based on a first white balance correction signal or a second white balance correction signal supplied through a switching or disabling means. A first white balance correction signal generator is provided independently of the image sensor and generates the first white balance correction signal correlating to a color temperature of the object. A second white balance correction signal generator generates the second white balance correction signal correlating to the color temperature of the object, based on the luminance signal output from the luminance signal/color signal separator and the color signal having the level corrected by the level correction means.