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:
Apr. 12, 1977
Filed:
Mar. 30, 1976
Applicant:
Inventors:
Tony Nick Criscimagna, Woodstock, NY (US);
Michael J Steinmetz, Hurley, NY (US);
Assignee:
IBM Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; H05B / ; H05B / ;
U.S. Cl.
CPC ...
3151 / ; 3151 / ;
Abstract
A circuit for supplying sustain voltage pulses to the orthogonal conductors of a gas display panel including voltage sensors to sense any change in sustain voltage amplitude with aging of the circuits and a voltage controlled oscillator to shift the operating frequency of sustain pulses as the amplitude changes. In that manner, the operating point of sustain voltage vs. frequency is shifted to take advantage of the slope in a graphical representation of sustain voltage margin to allow for shifting of the margin due to panel aging.