| abstract |
N driver units (102, 102, ..., 102) convert the respective ones of n digital values (D1, D2, ..., Dn) to the respective ones of n voltages (VS1, VS2, ..., VSn). N amplifiers (103, 103, ..., 103) amplify the respective ones of n voltages (VS1, VS2, ..., VSn) to generate the respective ones of n drive voltages (VD1, VD2, ..., VDn). An amplifier voltage supplying unit (14) supplies an amplifier voltage (VAMP) for driving the amplifiers (103, 103, ..., 103). An amplifier voltage control unit (15) detects the largest one of a plurality of digital values (Din, Din, ..., Din) and further sets the amplifier voltage (VAMP) to a voltage value that is in accordance with the largest digital value. |