Patent ID: 7142203

Claim:
A semiconductor device comprising: a plurality of switching elements; a plurality of pixel electrodes; an opposing electrode; and a frame rate conversion portion, wherein: an image signal is written into the frame rate conversion portion; the image signal written is read out twice from the frame rate conversion portion; the image signal which is read out twice from the frame rate conversion portion is then input to a source signal line driver circuit to make a display signal; the display signal is input to the plurality of pixel electrodes through the plurality of switching elements; all of the display signals input to the plurality of pixel electrodes have the same polarity within each frame period, with the electric potential of the opposing electrode as a reference; the frame rate conversion portion operates in synchronous with the display signals; among two arbitrary, adjacent frame periods, the display signal input to the plurality of pixels in the latter frame period to appear has an electric potential which is an inversion of the display signal input to the plurality of pixels in the former frame period, with the electric potential of the opposing electrode as a reference; and a same image is displayed in a pixel portion in the two arbitrary, adjacent frame periods.