Patent ID: 7385581

Claim:
A driving voltage control device operating in a first mode and in a second mode, and comprising a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and an output section, wherein in the first mode: the first capacitor receives a first voltage and stores an amount of charge according to a voltage value of the first voltage; the second capacitor receives a second voltage and stores an amount of charge according to a voltage value of the second voltage; and the output section supplies either one of a voltage according to the amount of charge stored in the first capacitor and a voltage according to the amount of charge stored in the second capacitor to a first output node according to a predetermined timing, and in the second mode: the third capacitor receives a third voltage and stores an amount of charge according to a voltage value of the third voltage; the fourth capacitor receives a fourth voltage and stores an amount of charge according to a voltage value of the fourth voltage; and the output section supplies either one of a voltage according to the amount of charge stored in the third capacitor and a voltage according to the amount of charge stored in the fourth capacitor to a second output node according to a predetermined timing.