Patent ID: 7002568

Claim:
A signal drive circuit for driving a plurality of signal lines of an electro-optical device which includes a plurality of pixels defined by a plurality of scan lines and the signal lines crossing each other, based on image data comprising: a line latch for latching the image data for a horizontal scan period; a drive voltage generating section for generating drive voltages of the signal lines based on the image data latched by the line latch; a signal line drive section for driving the signal lines based on the drive voltages generated by the drive voltage generating section; and a partial display data holding section for holding partial display data which indicates propriety of output of the drive voltages to the signal lines on a block basis, each block constituting a predetermined number of signal lines, wherein the signal line drive section includes: an impedance conversion section for subjecting drive voltages generated by the drive voltage generating section to impedance conversion to output the impedance-converted drive voltages to the signal lines; and a non-display level voltage supplying section for generating predetermined non-display level voltages on the signal lines, and wherein each of the signal lines is driven by one of the impedance conversion section and the non-display level voltage supplying section on a block basis based on the partial display data.