Patent ID: 7505019

Claim:
A drive circuit for driving matrix lines of a matrix line group of a liquid crystal device, comprising: a driver group having a plurality of drivers, each of which outputs a drive signal; a first switch group having a plurality of first switches, each of which has conductive and non-conductive states, the first switch connecting an output of the driver to the matrix line in the conductive state and disconnecting the output of the driver from the matrix line in the non-conductive state; a second switch group having a plurality of second switches, each of which has conductive and non-conductive states, the second switch connecting the matrix line to a precharge power supply in the conductive state and disconnecting the precharge power supply in the non-conductive state; and a switch control circuit which controls the conductive states of the first and second switch groups, wherein the switch control circuit sets the second switches to the conductive state when detecting all first switches of the first switch group have been made non-conductive states, and sets the first switches to the conductive state when detecting all second switches of the second switch group have been made non-conductive states.