Patent ID: 8797252

Claim:
A liquid crystal display apparatus comprising: plural gate wirings formed on a substrate; source wirings intersecting with the gate wirings through an insulating film; switching elements connected to the source wirings; pixel electrodes connected to the source wirings through the switching elements, to which pixel potentials are inputted according to a driving voltage for driving liquid crystals; and common electrodes, disposed opposite to the pixel electrodes and adapted so that a common potential is inputted thereto, a voltage supply circuit includes a plurality of resistors connected to the source wiring and is configured to have a plurality of voltage outputs and at least two switched states; and a driving circuit for inputting the pixel potentials to the source wirings according to a gradation voltage, wherein a scanning signal is inputted to the gate wirings so that one horizontal period of the liquid crystal display apparatus has a write time, in which the pixel potential is written to the pixel electrode, and a non-write time in which the pixel potential is not written to the pixel electrode, wherein the pixel potential is inputted to the source wiring in the write time, and an electric potential being closer to the common potential than the pixel potential is inputted to the source wiring in the non-write time, wherein in a first switched state during the write time, the voltage supply circuit is configured to generate an analog voltage based on a reference voltage and ratios among the plurality of resistors and supply a plurality of gradation voltages to the driving circuit according to a supplied reference voltage and resistances of the plurality of resistors, the pixel potential being generated based on the analog voltage of the voltage supply circuit, wherein in a second switched state the voltage supply circuit provides on each of the plurality of outputs the electric potential, which is closer to the common potential than the pixel potential, wherein each gradation voltage is associated with a respective combination of resistances of the plurality of resistors, and wherein the liquid crystal display apparatus is an in-plane switching liquid crystal display apparatus, which drives liquid crystals horizontally to the substrate according to an electric field generated by the pixel potential of the pixel electrode and the common potential of the common electrode.