| 摘要 |
PURPOSE:To reduce the rising the falling variation of driving pulses by varying and controlling the value of an inductor or capacitor so that the time constant of the resonance circuit composed of the inductor and floating capacitor is constant. CONSTITUTION:This circuit has plural changeover switches 14 which are each connected to a driving electrode of a matrix display panel 9 at one end and the variable inductor 15 which forms the resonance circuit together with the capacitor of the driving electrode while connected to the other-terminal sides of the parallel connected changeover switches 14, and the value of the variable inductor 15 is controlled matching variation in the composite value of the capacity of the driving electrodes by the switching of the changeover switches 14. Consequently, many driving electrodes connected of the matrix display panel 9 can be driven by a small number of recovery circuits and even if the number of the driving electrodes connected to the recovery circuits varies with time, the rising and falling time of the driving panel can be made constant. |
