| 摘要 |
PROBLEM TO BE SOLVED: To realize a driving device of plasma display in which a display panel is stably driven without a malfunction even though the spacing between discharging cells is made narrower, and a high quality video is displayed. SOLUTION: A detecting circuit 4 detects the light emitting pixel ratio of one screen from R, G and B digital data of A/D converting circuits 1, 2 and 3 and inputs the ratio into a control pulse power supply 5 as a signal Vcont. The power supply 5 reduces the subfield reset voltage to a lower level for the low ratio picture and increases the voltage to a higher level for the high ratio picture in accordance with the light emitting pixel ratio. A signal processing circuit 7 executes the process required for the display against the R, G and B digital signals from the circuits 1, 2 and 3. A driving circuit 8 inserts control pulses, that are required for a display, into the signals from the circuit 7 from the power supply 5 and converts the signals into the voltage to turn on plasma display panel 9. Thus, even though the spacing between discharging cells is made narrower, the generation of bright spots on a dark screen is prevented, a reset discharge is surely executed on a bright screen, no malfunction occurs and the panel 9 is stably driven.
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