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. 19, 1985
Filed:
Sep. 23, 1982
Applicant:
Inventor:
Takaaki Hashimoto, Noda, JP;
Assignee:
Nippon Kogaku K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 29 ; 358 40 ;
Abstract
A white balancing apparatus for color television cameras, which varies the response of color temperature compensation in accordance with the rate of change of the color temperature of the light illuminating an object to be shot by the camera. The apparatus includes a variable time constant circuit and a time constant control circuit which are connected between a color temperature detecting circuit and the chromaticity signal circuit of the TV camera, whereby the time constant is decreased and the response of color temperature compensation is made fast when the output variation of the color temperature detecting circuit deviates from a predetermined offset range.