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. 23, 1991
Filed:
Aug. 01, 1989
Fumihide Murao, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A holding circuit holds and outputs an output value of ratio signal generating means corresponding to the maximum value of illuminance of light which is emitted from a light source. A flashing light source detecting circuit detects the number of flashing times of the light source, to output a first signal when the number of flashing times exceeds a prescribed number, while outputting a second signal when the former is less than the latter. A switch circuit outputs an output of the holding circuit in response to the first signal from the flashing light source detecting circuit, while outputting an output of the ratio signal generating means in response to the second signal. A white balance adjusting circuit performs white balance adjustment in accordance with an output from the switch circuit. Thus, when the light source is a flashing one which flashes over the prescribed number of times, no white balance adjustment is performed on the basis of a signal in an OFF state of the light source.