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:
Feb. 01, 2000
Filed:
Jul. 11, 1996
Tsuyako Matsushita, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A colorimetric device, particularly suitable for a camera, that provides reliable color data so that a subject field is photographed with appropriate color balance. A CPU reads out sensor data D.sub.B, D.sub.R corresponding to red (R) and blue (B) light components of an incident light from the subject field a light sensor or photometric element disposed in the camera. Next, the CPU compares the sensor data D.sub.B of the B color component, and the sensor data D.sub.R of the R color component, with a predetermined standard value K1, and when it is determined that either of the sensor data D.sub.B of the B color component, or the sensor data D.sub.R of the R color component, is below the standard value K1, a 'measurement impossible' display is performed for a color temperature T and a balance value LB. On the other hand, if both sensor data D.sub.B, D.sub.R are greater than the standard value K1, the color temperature T and the light balance value LB are calculated by a calculation circuit. The color temperature T and the light balance value LB are displayed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile