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. 22, 1991
Filed:
Dec. 27, 1990
Kirk D Oliver, Forest Park, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
A horizontal deflection and high voltage regulation system for CRT displays and television receivers utilizes a single horizontal output transistor driving a conventional deflection yoke and high voltage transformer. A diode modulator and pulse width modulating system is coupled to the horizontal deflection yoke to provide control of horizontal scan size. A separate diode modulator and pulse width modulator is coupled to the horizontal transformer. A comparator is coupled to a resistive high voltage divider to produce an error voltage indicative of CRT anode voltage. The error voltage thus developed is applied to the diode modulator and pulse width modulator operative upon the high voltage transformer to control high voltage in response to changes of CRT beam current loading imposed thereon.