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:
Mar. 14, 1995
Filed:
Jul. 10, 1992
Yuichiro Hattori, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A filter member which can alternatively arrange a proper one of a plurality of kinds of color temperature converting filters onto an optical axis of an image pickup device is provided and the driver of the filter member is controlled by using a plurality of color signals which are generated from the image pickup device, so that a proper color temperature converting filter can always be used. An adjusting mechanism for adjusting relative gains of a plurality of color signals which are generated from the image pickup device is further provided. By also adjusting the adjusting mechanism by using a plurality of color signals which are generated from the image pickup device, an automatic white balance control in a wide color temperature range can be accomplished.