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US 8,941,790 B2Granted
Liquid crystal display device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHajime Kimura, Atsushi Umezaki, Shunpei Yamazaki
Life of this patent
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Abstract
A semiconductor device or the like with low off-state current is provided. A semiconductor device or the like for displaying images accurately is provided. A display device or the like with a wide viewing angle is provided. A display device or the like in which image burn-in is suppressed is provided. In order to achieve any of the above objects, a circuit is formed using a transistor including an oxide semiconductor (OS), particularly a thin film MOS transistor including an oxide semiconductor. The oxide semiconductor is a substantially intrinsic semiconductor. Thus, the off-state current of the transistor is extremely low.
Claims18
A liquid crystal display device comprising:
- a pixel including a first transistor, a second transistor, a first liquid crystal element, a second liquid crystal element, a first capacitor, a second capacitor, and a third capacitor,
- wherein a first terminal of the first transistor is electrically connected to a first wiring,
- wherein a second terminal of the first transistor is electrically connected to the first liquid crystal element,
- wherein a gate of the first transistor is electrically connected to a second wiring,
- wherein a first terminal of the second transistor is electrically connected to the first wiring,
- wherein a second terminal of the second transistor is electrically connected to the second liquid crystal element,
- wherein a gate of the second transistor is electrically connected to the second wiring,
- wherein a first terminal of the first capacitor is electrically connected to the first liquid crystal element,
- wherein a second terminal of the first capacitor is electrically connected to a third wiring,
- wherein a first terminal of the second capacitor is electrically connected to the second liquid crystal element,
- wherein a second terminal of the second capacitor is electrically connected to a fourth wiring,
- wherein a first terminal of the third capacitor is electrically connected to the first liquid crystal element, and
- wherein a second terminal of the third capacitor is electrically connected to the second liquid crystal element,
- wherein the third wiring is supplied with a first pulse signal,
- wherein the fourth wiring is supplied with a second pulse signal, and
- wherein the first transistor and the second transistor include a channel region including an oxide semiconductor.
13 more elements
A liquid crystal display device comprising:
- a pixel including a first transistor, a second transistor, a third transistor, a first liquid crystal element, a second liquid crystal element, a first capacitor, a second capacitor, and a third capacitor,
- wherein a first terminal of the first transistor is electrically connected to a first wiring,
- wherein a second terminal of the first transistor is electrically connected to the first liquid crystal element,
- wherein a gate of the first transistor is electrically connected to a second wiring,
- wherein a first terminal of the second transistor is electrically connected to the first wiring,
- wherein a second terminal of the second transistor is electrically connected to the second liquid crystal element,
- wherein a gate of the second transistor is electrically connected to the second wiring,
- wherein a first terminal of the first capacitor is electrically connected to the first liquid crystal element,
- wherein a second terminal of the first capacitor is electrically connected to a third wiring,
- wherein a first terminal of the second capacitor is electrically connected to the second liquid crystal element,
- wherein a second terminal of the second capacitor is electrically connected to a fourth wiring,
- wherein a first terminal of the third transistor is electrically connected to the second liquid crystal element,
- wherein a second terminal of the third transistor is electrically connected to a first terminal of the third capacitor, and
- wherein a second terminal of the third capacitor is electrically connected to a fifth wiring.
11 more elements
A liquid crystal display device comprising:
- a pixel including a first transistor, a second transistor, a third transistor, a first liquid crystal element, a second liquid crystal element, a first capacitor, a second capacitor, and a third capacitor,
- wherein a first terminal of the first transistor is electrically connected to a first wiring,
- wherein a second terminal of the first transistor is electrically connected to the first liquid crystal element,
- wherein a gate of the first transistor is electrically connected to a second wiring,
- wherein a first terminal of the second transistor is electrically connected to the first wiring,
- wherein a second terminal of the second transistor is electrically connected to the second liquid crystal element,
- wherein a gate of the second transistor is electrically connected to the second wiring,
- wherein a first terminal of the first capacitor is electrically connected to the first liquid crystal element,
- wherein a second terminal of the first capacitor is electrically connected to a third wiring,
- wherein a first terminal of the second capacitor is electrically connected to the second liquid crystal element,
- wherein a second terminal of the second capacitor is electrically connected to a fourth wiring,
- wherein a first terminal of the third capacitor is electrically connected to the second liquid crystal element,
- wherein a second terminal of the third capacitor is electrically connected to a first terminal of the third transistor, and
- wherein a second terminal of the third transistor is electrically connected to a fifth wiring.
11 more elements
Dependencies are inferred from the claim text.