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:
May. 12, 1998
Filed:
Aug. 15, 1996
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A white balance control device is provided for use in a video camera or a still video camera in which white balance control signals are controlled so that an object may be photographed without the occurrence of color failure. A user selects the light source to be employed. A microcomputer of the white balance control device detects a difference between integral averaged values for two color difference signals R-Y and B-Y and a reference value. The integral averaged values are to be equalized until this difference is within a predetermined value. The integral averaged values are also to be maintained within a variable region in accordance with the selected light source. Use of the variable region insures that deterioration of the reproduced color does not occur even when there is a difference between a selected light source and an actual color temperature.