Patent ID: 7411585
Filing Date: 2008-08-12
Classification: G09G

Abstract:
1. A driving voltage generation device, comprising: a first selector section for receiving a plurality of first supply voltages and outputting one of the first supply voltages; a second selector section for receiving a plurality of second supply voltages and outputting one of the second supply voltages; first to fourth switches connected in series between the first selector section and the second selector section; a first specified voltage supply section for supplying a first specified voltage to a first interconnection node between the first switch and the second switch; and a second specified voltage supply section for supplying a second specified voltage to a second interconnection node between the third switch and the fourth switch, wherein: the first switch is connected between the first selector section and the second switch; the second switch is connected between the first switch and the third switch; the third switch is connected between the second switch and the fourth switch; the fourth switch is connected between the third switch and the second selector section; the first specified voltage supply section does not supply the first specified voltage when the first switch is on; the second specified voltage supply section does not supply the second specified voltage when the fourth switch is on; an output of the first specified voltage supply section has a lower impedance than that of the second selector section; and an output of the second specified voltage supply section has a lower impedance than that of the first selector section.