Liquid crystal display device, driving method of the same, and electronic appliance including the same

摘要

An object is to provide a liquid crystal display device in which low power consumption can be achieved. A first substrate includes a terminal portion, a switching transistor, and a pixel circuit including a pixel electrode is provided. A second substrate includes a counter electrode. A liquid crystal element is interposed between the pixel electrode and the counter electrode. A potential to be input to the counter electrode is supplied from a terminal portion through the switching transistor. A semiconductor layer included in the switching transistor is an oxide semiconductor layer.

主权项

1. A liquid crystal display device comprising:
a first substrate provided with:
a terminal portion including a first connection terminal and a second connection terminal;a switching transistor; anda pixel circuit including a pixel, the pixel including a pixel transistor and a pixel electrode electrically connected to the pixel transistor; a second substrate provided with a counter electrode; and a liquid crystal interposed between the pixel electrode and the counter electrode, wherein the terminal portion is located outside of the pixel circuit, wherein the terminal portion and the second substrate do not overlap each other, wherein the counter electrode is electrically connected to one of a source and a drain of the switching transistor, wherein each of the pixel transistor and the switching transistor includes an oxide semiconductor layer, wherein the other of the source and the drain of the switching transistor is electrically connected to the first connection terminal, and wherein a gate of the switching transistor is electrically connected to the second connection terminal.