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. 24, 1992
Filed:
Apr. 25, 1989
Kazunori Suemoto, Tokyo, JP;
Makoto Tsugita, Tokyo, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A white balance control device used in an electronic image forming device having a color image sensor for providing color image signals includes a color balance correcting circuit that is provided to detect a color temperature of the light based on an output from a visible light sensor and to provide a correction signal according to the determined color temperature. Thereby the image signals may be corrected in white balance. The color balance correcting circuit may be operated in a fluorescent light mode or a natural light mode. A light source determining circuit cooperates with the color balance correcting circuit to determine whether the light source is a fluorescent light source in response to an output from an infrared light sensor and an actuating signal is provided that causes the white balance correcting circuit to operate in the fluorescent light mode when the light source is a fluorescent light source.