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:
Sep. 06, 1988
Filed:
Apr. 23, 1987
Applicant:
Inventor:
John W Stoughton, Indianapolis, IN (US);
Assignee:
RCA Licensing Corporation, Princeton, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358161 ; 358169 ;
Abstract
In a television receiver, a contrast control signal for controlling the amplitude of a video signal is a function of a manual contrast control component provided by a viewer, and an automatic contrast control component provided by a light sensitive circuit responsive to ambient light conditions. A 'soft' limiter limits the value of the extinguished due to excessive video signal attenuation in response to the control signal. The manual control component is provided by means including a duty cycle control device such as a binary rate multiplier or pulse width modulator.