Patent ID: 8743028

Claim:
An electrical appliance comprising: a light-emitting device, the light-emitting device comprising: a first insulating film over a substrate; a transistor over the first insulating film, the transistor comprising: a source region and a drain region over the first insulating film; a channel forming region between the source region and the drain region; and a drain wiring over the drain region, a second insulating film over the transistor, the second insulating film having a contact hole over the drain wiring; an EL element over the second insulating film, the EL element comprising: a first electrode over the second insulating film; an EL layer over the first electrode; and a second electrode over the EL layer, and a film over the EL element, a sensor obtaining an information signal of an environment; and a CPU controlling a luminance of the EL element based on the information signal, wherein the first electrode is in contact with the drain wiring through the contact hole.