Display system and electrical appliance
First Claim
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1. 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, anda 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.
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Abstract
A display system in which the luminance of light-emitting elements in a light-emitting device is adjusted based on information on an environment. A sensor obtains information on an environment as an electrical signal. A CPU converts, based on comparison data set in advance, the information signal into a correction signal for correcting the luminance of EL elements. Upon receiving this correction signal, a voltage changer applies a predetermined corrected potential to the EL elements. Thus, this display system enables control of the luminance of the EL elements.
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Citations
18 Claims
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1. An electrical appliance comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electrical appliance comprising:
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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; an interlayer insulating film over the second insulating film, the second insulating film and the interlayer insulating film have a contact hole; an EL element over the interlayer insulating film, the EL element comprising; a first electrode over the interlayer insulating film; an EL layer over the first electrode; and a second electrode over the EL layer, and a contact hole protective portion between the first electrode and the EL layer, 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, and wherein the contact hole protective portion fills the contact hole. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification