| 摘要 |
PROBLEM TO BE SOLVED: To reduce power consumption for preparing a counter potential to be supplied to a counter electrode at the time of a standby state performing the display of a still picture in a counter potential generating circuit for supplying the counter potential to a planar display device. SOLUTION: In a first display period (normal display state), a power source voltage VDD is supplied to a voltage dividing circuit 6 by turning switches SW1, SW2 ON with a switch control circuit 7 and a counter potential is made to be generated by inputting the setting voltage of the counter potential which is divided in this voltage dividing circuit 6 to an output amplifier circuit 1 and in a second display period (still picture display state), a current is made so as not to be supplied from the power source voltage VDD to the circuit 6 by turning the switches SW1, SW2 OFF with the circuit 7 and a counter potential is made to be generated by inputting the setting voltage of the counter potential stored in a capacitor C to the output amplifier circuit 1.
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