Patent ID: 7164403

Claim:
A liquid crystal display device comprising: a plurality of pixels arranged in a matrix; a plurality of video signal lines for supplying video signal voltages to said plurality of pixels; a drive circuit which selects a voltage level of a gray scale voltage varying periodically as one of said video signal voltages corresponding to display data to be supplied to one of said plurality of pixels; and a plurality of time control signal lines for supplying time control signals varying in synchronism with said gray scale voltage to said drive circuit, wherein said drive circuit has a plurality of series combinations of plural processing circuits; wherein each of said plurality of series combinations of plural processing circuits corresponds to one of said plurality of video signal lines; wherein each of said plural processing circuits comprises a parallel combination of a first switching element and a second switching element; wherein each of said first and second switching elements has a first electrode, a second electrode, and a gate electrode, said first electrodes of said first and second switching elements are connected together, said second electrodes of said first and second switching elements are connected together; wherein each of said display data is input to said gate electrode of said second switching element of a corresponding one of said plural processing circuits of each of said plurality of series combinations; wherein each of said time control signals is input to said gate electrode of said first switching element of a corresponding one of said plural processing circuits of each of said plurality of series combinations; wherein said first switching element is made operative or inoperative as a switch in accordance with said display data, and said second switching element is made operative or inoperative as a switch in accordance with a corresponding one of said time control signals; and wherein a respective one of said plurality of series combinations of said plural processing circuits determines a time to select said voltage level by a combination of said switch-operative ones of said first switching elements in said respective one of said plurality of series combinations of plural processing circuits.