DISPLAY DEVICE
First Claim
1. A display device comprising:
- a scan line and a signal line intersecting with each other over a substrate;
a pixel portion in which pixel electrodes are arranged in matrix; and
a non-linear element provided over the substrate in a region outside the pixel portion,wherein the pixel portion comprises a thin film transistor in which a channel formation region is formed in a first oxide semiconductor layer,wherein the non-linear element comprises;
a gate electrode;
a first oxide semiconductor layer formed over the gate electrode; and
a first wiring layer and a second wiring layer each of which is formed by stacking a conductive layer and a second oxide semiconductor layer and whose end portions overlap with the gate electrode,wherein the gate electrode is connected to the scan line or the signal line, andwherein one of the first wiring layer and the second wiring layer of the non-linear element is directly connected to a third wiring layer formed with the same layer as the gate electrode.
1 Assignment
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Accused Products
Abstract
A display device including an oxide semiconductor, a protective circuit and the like having appropriate structures and a small occupied area is necessary. The protective circuit is formed using a non-linear element which includes a gate insulating film covering a gate electrode; a first oxide semiconductor layer which is over the gate insulating layer and overlaps with the gate electrode; and a first wiring layer and a second wiring layer each of which is formed by stacking a conductive layer and a second oxide semiconductor layer and whose end portions are over the first oxide semiconductor layer and overlap with the gate electrode. The gate electrode of the non-linear element is connected to a scan line or a signal line, the first wiring layer or the second wiring layer of the non-linear element is directly connected to the gate electrode layer so as to apply potential of the gate electrode.
143 Citations
15 Claims
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1. A display device comprising:
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a scan line and a signal line intersecting with each other over a substrate; a pixel portion in which pixel electrodes are arranged in matrix; and a non-linear element provided over the substrate in a region outside the pixel portion, wherein the pixel portion comprises a thin film transistor in which a channel formation region is formed in a first oxide semiconductor layer, wherein the non-linear element comprises; a gate electrode; a first oxide semiconductor layer formed over the gate electrode; and a first wiring layer and a second wiring layer each of which is formed by stacking a conductive layer and a second oxide semiconductor layer and whose end portions overlap with the gate electrode, wherein the gate electrode is connected to the scan line or the signal line, and wherein one of the first wiring layer and the second wiring layer of the non-linear element is directly connected to a third wiring layer formed with the same layer as the gate electrode. - View Dependent Claims (2, 3, 4, 5)
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6. A display device comprising:
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a scan line and a signal line intersecting with each other over a substrate; a pixel portion in which pixel electrodes are arranged in matrix; and a non-linear element provided over the substrate in a region outside the pixel potion; wherein the pixel portion comprises a thin film transistor in which a channel formation region is formed in a first oxide semiconductor layer, wherein the thin film transistor comprises; a gate electrode which is connected to the scan line; a first wiring layer which is connected to the signal line and the first oxide semiconductor layer; and a second wiring layer which is connected to a pixel electrode and the first oxide semiconductor layer, wherein the non-linear element comprises; a gate electrode; a first oxide semiconductor layer formed over the gate electrode; and a first wiring layer and a second wiring layer each of which is formed by stacking a conductive layer and a second oxide semiconductor layer and whose end portions overlap with the gate electrode, wherein the gate electrode of the non-linear element is connected to the scan line or the signal line, and wherein one of the first wiring layer and the second wiring layer of the non-linear element is directly connected to a third wiring layer formed with the same layer as the gate electrode of the non-linear element. - View Dependent Claims (7, 8, 9, 10)
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11. A display device comprising:
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a scan line and a signal line intersecting with each other over a substrate; a pixel portion in which pixel electrodes are arranged in matrix; and a protective circuit over the substrate and in a region outside the pixel portion, the protective circuit connecting the scan line and a common wiring, wherein the pixel portion comprises a thin film transistor in which a channel formation region is formed in a first oxide semiconductor layer, wherein the thin film transistor comprises; a gate electrode which is connected to the scan line; a first wiring layer which is connected to the signal line and the first oxide semiconductor layer; and a second wiring layer which is connected to a pixel electrode and the first oxide semiconductor layer, wherein the protective circuit includes a non-linear element, the non-linear element comprising; a gate electrode; a first oxide semiconductor layer formed over the gate electrode; and a first wiring layer and a second wiring layer each of which is formed by stacking a conductive layer and a second oxide semiconductor layer and whose end portions overlap with the gate electrode, wherein the gate electrode of the non-linear element is connected to the scan line or the signal line, and wherein one of the first wiring layer and the second wiring layer of the non-linear element is directly connected to a third wiring layer formed with the same layer as the gate electrode of the non-linear element. - View Dependent Claims (12, 13, 14, 15)
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Specification