Patent ID: 8072404

Claim:
A liquid crystal display device comprising: a liquid crystal display panel including a plurality of pixel, a plurality of scanning signal line, and a plurality of video signal line; and a plurality of driving circuit which drive the liquid crystal display panel, the driving circuits comprising a first driving circuit forming in a step similar to a step for forming transistor of pixel regions provided to the liquid crystal display panel, a second driving circuit which is connected to the liquid crystal display panel after formation of the liquid crystal display panel, and electrically connecting with the first driving circuit in series, and a third driving circuit provided on the liquid crystal display panel and supplying a scanning voltage in one horizontal scanning period; wherein the second driving circuit supplies more than one different gray scale voltage signal from one output thereof in one horizontal scanning period to the first driving circuit and converts a voltage level of a control signal that controls the first driving circuit, and the first driving circuit changes electrical connections between one output of the second driving circuit and a plurality of video signal lines in one horizontal scanning period.