Projection TV
First Claim
Patent Images
1. A projection television set comprising a liquid crystal panel comprising:
- a substrate;
a pixel portion comprising;
a first thin film transistor comprising;
a active layer over the substrate;
a gate insulating layer over the active layer; and
a gate electrode over the gate insulating layer;
a capacitor element comprising;
a first electrode electrically connected to the active layer;
an insulating layer over the first electrode; and
a second electrode over the insulating layer; and
a liquid crystal element electrically connected to the active layer;
a signal line electrically connected to the first thin film transistor; and
a driver portion electrically connected to the signal line, comprising a second thin film transistor over the substrate, wherein the active layer comprises a crystalline silicon layer, and wherein the insulating layer comprising a silicon nitride.
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Abstract
Thin-film transistors constituting a liquid crystal module have a channel forming region that is a crystal structural body in which a plurality of rod-like or flat-rod-like crystals are arranged in a particular direction. In the thin-film transistors, deteriorations in device characteristics due to hot carrier injection or the like can be prevented effectively when the temperature is in a range of 80° C.-250° C. (preferably 100° C.-200° C.). Therefore, a projection TV that is very high in reliability can be realized.
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Citations
20 Claims
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1. A projection television set comprising a liquid crystal panel comprising:
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a substrate;
a pixel portion comprising;
a first thin film transistor comprising;
a active layer over the substrate;
a gate insulating layer over the active layer; and
a gate electrode over the gate insulating layer;
a capacitor element comprising;
a first electrode electrically connected to the active layer;
an insulating layer over the first electrode; and
a second electrode over the insulating layer; and
a liquid crystal element electrically connected to the active layer;
a signal line electrically connected to the first thin film transistor; and
a driver portion electrically connected to the signal line, comprising a second thin film transistor over the substrate, wherein the active layer comprises a crystalline silicon layer, and wherein the insulating layer comprising a silicon nitride. - View Dependent Claims (2, 3, 4, 5)
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6. A projection television set comprising a liquid crystal panel comprising:
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a substrate;
a pixel portion comprising;
a first thin film transistor comprising;
a first active layer over the substrate;
a first gate insulating layer over the first active layer; and
a first gate electrode over the gate insulating layer;
a capacitor element comprising;
a first electrode electrically connected to the first active layer;
an insulating layer over the first electrode; and
a second electrode over the insulating layer; and
a liquid crystal element electrically connected to the first active layer;
a signal line electrically connected to the first thin film transistor; and
a driver portion electrically connected to the signal line, comprising a second thin film transistor comprising;
a second active layer over the substrate;
a second gate insulating layer over the second active layer; and
a second gate electrode over the second gate insulating layer;
wherein each of the first active layer and second active layer comprises a crystalline silicon layer, and wherein the insulating layer comprising a silicon nitride. - View Dependent Claims (7, 8, 9, 10)
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11. A projection television set comprising a liquid crystal panel comprising:
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a substrate;
a pixel portion comprising;
a first thin film transistor comprising;
a active layer over the substrate;
a gate insulating layer over the active layer; and
a gate electrode over the gate insulating layer;
a capacitor element comprising;
a first electrode electrically connected to the active layer;
an insulating layer over the first electrode; and
a second electrode over the insulating layer; and
a liquid crystal element electrically connected to the active layer;
a signal line electrically connected to the first thin film transistor; and
a driver portion electrically connected to the signal line, comprising a second thin film transistor over the substrate, wherein the active layer comprises a crystalline silicon layer, wherein the insulating layer comprising a silicon nitride, and wherein the active layer has a channel forming region and a low-concentration impurity region adjacent to the channel forming region. - View Dependent Claims (12, 13, 14, 15)
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16. A projection television set comprising a liquid crystal panel comprising:
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a substrate;
a pixel portion comprising;
a first thin film transistor comprising;
a first active layer over the substrate;
a first gate insulating layer over the first active layer; and
a first gate electrode over the gate insulating layer;
a capacitor element comprising;
a first electrode electrically connected to the first active layer;
an insulating layer over the first electrode; and
a second electrode over the insulating layer; and
a liquid crystal element electrically connected to the first active layer;
a signal line electrically connected to the first thin film transistor; and
a driver portion electrically connected to the signal line, comprising a second thin film transistor comprising;
a second active layer over the substrate;
a second gate insulating layer over the second active layer; and
a second gate electrode over the second gate insulating layer;
wherein each of the first active layer and second active layer comprises a crystalline silicon layer, wherein the insulating layer comprising a silicon nitride and wherein each of the first active layer and the second active layer has a channel forming region and a low-concentration impurity region adjacent to the channel forming region. - View Dependent Claims (17, 18, 19, 20)
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Specification