GAS PANEL SYSTEM WITH INTERROGATION BY SELECTIVE SUSTAIN

摘要

Readout from a gas panel system is achieved by modifying the sustain drive circuitry, which normally applies a full sustain voltage to all cells simultaneously, so that only a partial sustain voltage is applied, and using address circuitry, also used e.g. for writing, to address one or more selected cells so that only those selected cells have the partial sustain voltage boosted to the full sustain voltage and go through a selective sustain cycle, different cells being selected during different cycles to provide sequential readout. During a sustain cycle a cell will ignite twice whose walls had been previously charged to represent data. Cell ignition is detected photoelectrically by detectors each common to a number of cells to provide readout.