DISPLAY DEVICE
First Claim
1. A display device comprising:
- a pixel portion at least comprising a first thin film transistor including a first oxide semiconductor layer; and
a driver circuit at least comprising a second thin film transistor including a second oxide semiconductor layer and a third thin film transistor including a third oxide semiconductor layer,wherein a wiring in direct contact with a gate electrode of the second thin film transistor provided below the second oxide semiconductor layer is provided above the third oxide semiconductor layer, andwherein the wiring is a source wiring or a drain wiring of the third thin film transistor electrically connected to the third oxide semiconductor layer.
1 Assignment
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Accused Products
Abstract
With an increase in the definition of a display device, the number of pixels is increased, and thus the numbers of gate lines and signal lines are increased. Due to the increase in the numbers of gate lines and signal lines, it is difficult to mount an IC chip having a driver circuit for driving the gate and signal lines by bonding or the like, which causes an increase in manufacturing costs. A pixel portion and a driver circuit for driving the pixel portion are formed over one substrate. At least a part of the driver circuit is formed using an inverted staggered thin film transistor in which an oxide semiconductor is used. The driver circuit as well as the pixel portion is provided over the same substrate, whereby manufacturing costs are reduced.
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Citations
20 Claims
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1. A display device comprising:
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a pixel portion at least comprising a first thin film transistor including a first oxide semiconductor layer; and a driver circuit at least comprising a second thin film transistor including a second oxide semiconductor layer and a third thin film transistor including a third oxide semiconductor layer, wherein a wiring in direct contact with a gate electrode of the second thin film transistor provided below the second oxide semiconductor layer is provided above the third oxide semiconductor layer, and wherein the wiring is a source wiring or a drain wiring of the third thin film transistor electrically connected to the third oxide semiconductor layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A display device comprising:
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a pixel portion at least comprising a first thin film transistor including a first oxide semiconductor layer; and a driver circuit at least comprising a second thin film transistor including a second oxide semiconductor layer and a third thin film transistor including a third oxide semiconductor layer, wherein a wiring in direct contact with a gate electrode of the second thin film transistor provided below the second oxide semiconductor layer is provided above the third oxide semiconductor layer, wherein the wiring is a source wiring or a drain wiring of the third thin film transistor electrically connected to the third oxide semiconductor layer, and wherein a fourth oxide semiconductor layer having smaller thickness and higher conductivity than the third oxide semiconductor layer is provided between the source wiring and the third oxide semiconductor layer or between the drain wiring and the third oxide semiconductor layer. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification