| 摘要 |
PURPOSE:To reduce electric power consumption, and downsize an electric power supply circuit by inputting an output pulse of a reactive power recovery circuit formed by using an inductance to one electric power supply terminal. CONSTITUTION:An output 3 of a reactive power recovery circuit 6 is connected to a high electric potential side electric power supply terminal 9 of a driver IC 10 composed of a complementary type MOS transistor. Respective outputs of this drive IC 10 are further connected to a scanning electrode of an XY matrix panel and a data electrode. When the third P type MOS transistor is turned on by controlling an input terminal, an output pulse created in the reactive power recovery circuit 6 is impressed on the electrode of the XY matrix panel. Though there exists a capacitance in the electrode of this panel, a charging/discharging electric power can be recovered by means of the reactive power recovery circuit 6. When the third N type MOS transistor is turned on, the output is fixed in low.
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