To provide a low-priced reflection type liquid crystal display device where a contrast ratio is high and flicker is reduced in display characteristics, and also a leakage current is small and temperature stability is high.

This display device is constituted of a TFT arranged in a one-dimensional or two-dimensional matrix state through insulated film 2 on a substrate 1 which consists of conductive material, an electrode 17 connected to the drain 4 of the TFT, a picture element electrode 10, a transparent electrode 20 arranged opposed to the picture element electrode 10 through liquid crystal, a gate 3 controlling the continuity or noncontinuity of the TFT and a signal line adding a modulation signal to the picture element electrode 10 through the TFT. Thus, a stabilized display picture where a heat radiating characteristic is excellent, the leakage current is small and the contrast ratio is large is obtained.