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Large Gas Panel Margin Compensation Circuit Disclosure Number: IPCOM000070183D
Original Publication Date: 1978-Aug-01
Included in the Prior Art Database: 2005-Feb-21

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Hoo, SK Steinmetz, MJ [+details]


One of the critical characteristics of a gaseous discharge display panel is the operating margin, i.e., the difference between the maximum sustain voltage (V(s)max.) and the minimum sustain voltage (V(s)min.). This margin varies with the number of lighted cells in a panel, and since panels are supplied with a fixed sustain voltage, the effective operating margin is thus reduced. A circuit adapted to compensate for the sustain margin shift in an operating gas panel adjusts the sustain voltage by tracking the sustain voltage and adjusting a sustain regulator as a function of the load line signals.