DISPLAY DEVICE, SEMICONDUCTOR DEVICE, AND DRIVING METHOD THEREOF
First Claim
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1. A semiconductor device comprising:
- a first transistor;
a second transistor; and
a third transistor,wherein one of a source and a drain of the first transistor is electrically connected to a first line, and the other of the source and the drain of the first transistor is electrically connected to a second line,wherein one of a source and a drain of the second transistor is electrically connected to the second line, the other of the source and the drain of the second transistor is electrically connected to a gate of the first transistor, and a gate of the second transistor is electrically connected to the first line,wherein one of a source and a drain of the third transistor is electrically connected to a third line, the other of the source and the drain of the third transistor is electrically connected to the gate of the first transistor, and a gate of the third transistor is electrically connected to the third line, andwherein each channel region of the second transistor and the third transistor is formed using an oxide semiconductor.
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Abstract
An object is to provide a semiconductor device with improved operation. The semiconductor device includes a first transistor, and a second transistor electrically connected to a gate of the first transistor. A first terminal of the first transistor is electrically connected to a first line. A second terminal of the first transistor is electrically connected to a second line. The gate of the first transistor is electrically connected to a first terminal or a second terminal of the second transistor.
134 Citations
26 Claims
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1. A semiconductor device comprising:
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a first transistor; a second transistor; and a third transistor, wherein one of a source and a drain of the first transistor is electrically connected to a first line, and the other of the source and the drain of the first transistor is electrically connected to a second line, wherein one of a source and a drain of the second transistor is electrically connected to the second line, the other of the source and the drain of the second transistor is electrically connected to a gate of the first transistor, and a gate of the second transistor is electrically connected to the first line, wherein one of a source and a drain of the third transistor is electrically connected to a third line, the other of the source and the drain of the third transistor is electrically connected to the gate of the first transistor, and a gate of the third transistor is electrically connected to the third line, and wherein each channel region of the second transistor and the third transistor is formed using an oxide semiconductor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A semiconductor device comprising:
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a first transistor; a second transistor; and a third transistor, wherein one of a source and a drain of the first transistor is electrically connected to a first line, and the other of the source and the drain of the first transistor is electrically connected to a second line, wherein one of a source and a drain of the second transistor is electrically connected to the second line, the other of the source and the drain of the second transistor is electrically connected to a gate of the first transistor, and a gate of the second transistor is electrically connected to the first line, wherein one of a source and a drain of the third transistor is electrically connected to a third line, the other of the source and the drain of the third transistor is electrically connected to the gate of the first transistor, and a gate of the third transistor is electrically connected to the third line, and wherein each channel region of the first to third transistors is formed using an oxide semiconductor. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A driving method of a semiconductor device comprising a first transistor, a second transistor, and a third transistor,
wherein one of a source and a drain of the first transistor is electrically connected to a first line, and the other of the source and the drain of the first transistor is electrically connected to a second line, wherein one of a source and a drain of the second transistor is electrically connected to the second line, the other of the source and the drain of the second transistor is electrically connected to a gate of the first transistor, and a gate of the second transistor is electrically connected to the first line, wherein one of a source and a drain of the third transistor is electrically connected to a third line, the other of the source and the drain of the third transistor is electrically connected to the gate of the first transistor, and a gate of the third transistor is electrically connected to the third line, and wherein each channel region of the second transistor and the third transistor is formed using an oxide semiconductor, the driving method comprising the steps of: -
turning on the first transistor, thereby establishing electrical continuity between the first line and the second line in a first period; turning on the third transistor, thereby establishing electrical continuity between the third line and a gate of the first transistor in the first period; turning on the first transistor, thereby establishing electrical continuity between the first line and the second line in a second period; turning on the first transistor, thereby establishing electrical continuity between the first line and the second line in a third period; turning on the second transistor, thereby establishing electrical continuity between the second line and the gate of the first transistor in the third period; and turning on the first transistor, thereby establishing electrical continuity between the first line and the second line in a fourth period. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A driving method of a semiconductor device comprising a first transistor, a second transistor, and a third transistor,
wherein one of a source and a drain of the first transistor is electrically connected to a first line, and the other of the source and the drain of the first transistor is electrically connected to a second line, wherein one of a source and a drain of the second transistor is electrically connected to the second line, the other of the source and the drain of the second transistor is electrically connected to a gate of the first transistor, and a gate of the second transistor is electrically connected to the first line, wherein one of a source and a drain of the third transistor is electrically connected to a third line, the other of the source and the drain of the third transistor is electrically connected to the gate of the first transistor, and a gate of the third transistor is electrically connected to the third line, and wherein each channel region of the second transistor and the third transistor is formed using an oxide semiconductor, the driving method comprising the steps of: -
turning on the first transistor, thereby establishing electrical continuity between the first line and the second line in a first period; turning on the third transistor, thereby establishing electrical continuity between the third line and a gate of the first transistor in the first period; turning off the second transistor, thereby breaking electrical continuity between the second line and the gate of the first transistor in the first period; turning on the first transistor, thereby establishing electrical continuity between the first line and the second line in a second period; turning off the third transistor, thereby breaking electrical continuity between the third line and the gate of the first transistor in the second period; turning off the second transistor, thereby breaking electrical continuity between the second line and the gate of the first transistor in the second period; turning on the first transistor, thereby establishing electrical continuity between the first line and the second line in a third period; turning off the third transistor, thereby breaking electrical continuity between the third line and the gate of the first transistor in the third period; turning on the second transistor, thereby establishing electrical continuity between the second line and the gate of the first transistor in the third period; turning on the first transistor, thereby establishing electrical continuity between the first line and the second line in a fourth period; turning off the third transistor, thereby breaking electrical continuity between the third line and the gate of the first transistor in the fourth period; and turning off the second transistor, thereby breaking electrical continuity between the second line and the gate of the first transistor in the fourth period. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification