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, 1994
Filed:
Sep. 15, 1992
Makoto Usami, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A video camera apparatus having a solid state imager for generating video signals and a black level balance adjusting circuit for automatically adjusting black levels of the video signals. The video camera apparatus comprises an incident light control device, an electronic shutter control circuit, a comparator and a processor. The incident light control device controls the amount of light incident to the solid state imager. The electronic shutter control circuit varies the mode of the solid state imager between at least a first mode and a second mode. The effective accumulating period of the solid state imager in the first mode is different from the corresponding period in the second mode. The comparator compares the voltage level of the video signal obtained in the first mode with that obtained in the second mode. The processor controls the electronic shutter control circuit and the comparator, and activates the black level balance adjusting circuit when the voltage levels of the video signals obtained in the first and the second modes are substantially the same.