Patent ID: 8692753

Claim:
A liquid crystal display device formed in a structure in which a liquid crystal is sandwiched between a first substrate and a second substrate, the first substrate including a plurality of pixels arranged in each area sectioned by a plurality of data lines and a plurality of gate lines, each of the pixels having a first switching device, a second switching device, a pixel capacitance, and a storage capacitance, wherein: the pixel capacitance and the storage capacitance are connected to the data line via the first switching device; the pixel capacitance and the storage capacitance are connected to a black signal supplying wiring via the second switching device; the first switching device is controlled by two of the gate lines that are different from each other; the second switching device is controlled by the two different gate lines; the two different gate lines have consecutive four periods constituting one frame period, including two periods in which potential levels of the two gate lines are same with respect to each other and two periods in which the potential levels are different from each other; the first switching device becomes electrically conductive in one of the four periods; and the second switching device becomes electrically conductive in one of the four periods, which is different from the period where the first switching device becomes electrically conductive, one of the two periods within the one frame period for which the potential levels are different from each other is equal to a period during which a video signal supplied by the data line is written to the liquid crystal display device, and the other one of the two periods within the one frame period for which the potential levels are different from each other is equal to a period during which a black signal supplied by the black signal supplying wiring is written to the liquid crystal display device.