Display device and electronic appliance

摘要

A display device with low manufacturing cost, a display device with low power consumption, a display device capable of being formed over a large substrate, a display device with a high aperture ratio of a pixel, and a display device with high reliability are provided. The display device includes a transistor electrically connected to a light-transmitting pixel electrode and a capacitor. The transistor includes a gate electrode, a gate insulating film, and a first multilayer film including an oxide semiconductor layer. The capacitor includes the pixel electrode and a second multilayer film overlapping with the pixel electrode, positioned at a predetermined distance from the pixel electrode, and having the same layer structure as the first multilayer film. A channel formation region of the transistor is at least one layer, which is not in contact with the gate insulating film, of the first multilayer film.

主权项

1. A display device comprising:
a driver circuit comprising a transistor, the transistor comprising:
a first oxide layer;a second oxide layer over the first oxide layer; anda third oxide layer over the second oxide layer; an insulating layer over the third oxide layer; and a pixel portion comprising a liquid crystal element, the liquid crystal element comprising:
a first electrode comprising a fourth oxide layer;the insulating layer over the first electrode;a second electrode over the insulating layer; anda liquid crystal layer over the first electrode and the second electrode, wherein the third oxide layer and the fourth oxide layer are provided in the same layer, and wherein the second oxide layer comprises a channel formation region of the transistor.