LIGHT-EMITTING DEVICE

摘要

A light-emitting device capable of suppressing variation in luminance among pixels is provided. A light-emitting device includes a pixel and first and second circuits. The first circuit has a function of generating a signal including a value of current extracted from the pixel. The second circuit has a function of correcting an image signal by the signal. The pixel includes at least a light-emitting element and first and second transistors. The first transistor has a function of controlling supply of the current to the light-emitting element by the image signal. The second transistor has a function of controlling extraction of the current from the pixel. A semiconductor film of each of the first and second transistors includes a first semiconductor region overlapping with a gate, a second semiconductor region in contact with a source or a drain, and a third semiconductor region between the first and second semiconductor regions.

主权项

1. A light-emitting device comprising: a wiring;
a first transistor comprising a first semiconductor film, and a first gate electrode and a second gate electrode overlapping with each other with the first semiconductor film therebetween; a second transistor comprising a second semiconductor film; a first capacitor configured to hold a potential difference between one of a first source electrode and a first drain electrode of the first transistor and the first gate electrode; a second capacitor configured to hold a potential difference between the one of the first source electrode and the first drain electrode of the first transistor and the second gate electrode; and a light-emitting element supplied with drain current of the first transistor; wherein the second transistor is configured to control conduction between the second gate electrode and the wiring, and wherein a semiconductor film of each of the first transistor and the second transistor comprises a semiconductor region overlapping with a gate electrode and having a carrier density less than or equal to 1×1017/cm3.