Patent ID: 8633885

Claim:
A display panel driving apparatus for receiving an image signal and driving a display panel having a plurality of scanning lines extending horizontally and a plurality of source lines extending vertically across a two-dimensional screen with display cells functioning as pixels located at intersections of the source and scanning lines, the display panel driving apparatus comprising: a latch unit for receiving a load signal, latching pixel data responsive to the load signal, and outputting the latched pixel data, the pixel data being obtained from the image signal; a pixel driving potential generating unit for generating first pixel driving potentials higher than a reference potential and second pixel driving potentials lower than the reference potential from the latched pixel data output by the latch unit; a switching unit for switching among a first state, a second state and a third state, the switching unit switchably interconnecting the pixel driving potential generating unit to the source lines in the first and second states, the switching unit periodically switching between the first state and the second state, the first pixel driving potentials being supplied to a first group of the source lines and the second pixel driving potentials being supplied to a second group of the source lines in the first state, the first pixel driving potentials being supplied to the second group of the source lines and the second pixel driving potentials being supplied to the first group of the source lines in the second state, the first and second groups of source lines being mutually exclusive, the switching unit electrically disconnecting the source lines from the pixel driving potential generating unit in the third state so that no driving potentials are supplied from the driving potential generating unit to the first and second groups of the source lines; and a control unit for supplying the load signal to the latch unit and controlling the switching unit, the control unit placing the switching unit in the third state for a predetermined interval following supply of the load signal to the latch unit.