Liquid crystal display device having an improved gray-scale voltage generating circuit

摘要

A liquid crystal display device includes a liquid crystal panel having plural pixels and a video signal line driver circuit for supplying a video signal voltage to each of the pixels via a corresponding one of plural video lines in accordance with a P-bit display data. The video signal line driver circuit includes a power supply circuit for supplying Q different gray-scale voltages, plural selector circuits corresponding to the video lines, each of the selector circuits for outputting one of first and second pairs of voltages in accordance with the display data, the first pair being two voltages equal to a same one selected from among the Q different gray-scale voltages, the second pair being two different voltages selected from among the Q different gray-scale voltages, and plural amplifiers corresponding to the video lines, each of the amplifiers for outputting the video signal voltage to a corresponding one of the video lines based upon one of the first and second pairs of voltages or a voltage intermediate between the second pair of voltages and produced from the second pair of voltages in the amplifiers.