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:
Jul. 14, 1987
Filed:
Aug. 01, 1985
Applicant:
Inventors:
Assignee:
Nippon Hoso Kyokai, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
358224 ; 358227 ; 358 37 ;
Abstract
The picture signal to be displayed on the viewfinder is corrected so as to be adaptive to the spatial frequency performance of visual system at close viewing distance of about three times of the viewing screen height. As a result, the luminance or the coloring of edge portions of the viewed picture is clearly emphasized and hence accurate and rapid focusing of pickup lens provided in any kind of TV camera is facilitated without conventional trial and error.