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:
Oct. 17, 1978
Filed:
Jul. 07, 1976
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358169 ; 358243 ; 358176 ;
Abstract
In a television receiver having a peak value type AGC circuit for maintaining the amplitude difference between a carrier zero level and the peak value of a composite video signal amplified by a high frequency amplifier and a video intermediate frequency amplifier at a constant magnitude, an automatic brightness limiter (ABL) circuit is provided which controls the AGC circuit such that when the beam current exceeds a predetermined value and the carrier zero level approaches the peak value, a composite video signal of reduced amplitude is produced.