This invention relates to a digital/analog converter circuit, a level shift circuit, a shift-register containing this level shift circuit, a sampling latch circuit and a latch circuit as well as a liquid crystal display (LCD) device. The LCD device includes an integrated drive circuit integrated and a digital/analog converter circuit. The digital/analog converter circuit has a matrix of polysilicon thin film transistors positioned on the substrate, as switching devices for the pixels. The shift register includes a level shift circuit and a sampling latch circuit These circuits may be incorporated into a single scanning type structural circuit with the drive circuit-integrated LCD device to provide an LCD panel with a narrow picture frame, stable level shift operation, stable sampling & latch operation in a circuit having an extremely small number of components, low power consumption and a small surface area.