| 摘要 |
When charging at a voltage with a polarity different from that of a voltage charged in the capacitive display element, by turning the switch ON, after carrying out a charging/discharging to modulate both electrodes of the capacitive display element to the ground potential, the same is charged at a voltage with another polarity. As compared with the case where the charging/discharging between the positive power supply voltage + V M and the negative power supply voltage - V M is made directly, the electric power consumption can be reduced to 1/2 when the same is once modulated to the ground potential 0V. The electric power consumption can be further reduced by modulating the intermediate potential in a plurality of steps.
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