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Gas Panel Brightness Control Disclosure Number: IPCOM000067095D
Original Publication Date: 1979-Jun-01
Included in the Prior Art Database: 2005-Feb-20

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Pearson, KA Zucker, LR [+details]


One of the desirable features of a plasma display device would be that of brightness control. Since the brightness of a plasma display is a function of, among other things, the number of discharges per second, which in turn is a function of the sustain frequency, one obvious method of varying the intensity is to vary the sustain frequency. However, from a systems standpoint, this is undesirable since the sustain frequency is one of the constants upon which the drive selection circuits and gas panel characteristics are based. An alternative method of changing the number of discharges per second is to interrupt the sustain signal with a variable delay which is adjusted in accordance with the brightness desired.