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. 15, 1985
Filed:
Jan. 26, 1983
Paul W Bond, Kingston, NY (US);
James D Rockrohr, Kingston, NY (US);
International Business Corporation, Armonk, NY (US);
Abstract
The initiation of the flyback interval of a variable format CRT display system is controlled by a frequency independent closed loop compensation circuit. The termination point of a sawtooth pulse, which is initiated at the start of the horizontal sync for the CRT display system, determines the point for the initiation of the flyback interval. The termination point of the sawtooth is compared with the center of the flyback interval. So long as the flyback pulse is perfectly centered on the termination point, the timing is proper. However, if it is off-centered, circuitry results in delaying or advancing the turning off of the horizontal yoke driver to modify the initiation of the flyback interval in a manner to compensate for the change in delay.