Liquid crystal display device and electronic device
First Claim
1. A transistor comprising an oxide semiconductor layer, wherein characteristics of the transistor comprises:
- an off-current being less than or equal to 10 aA/μ
m at room temperature; and
an off-current being less than or equal to 100 aA/μ
m at a temperature of 85°
C.
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Accused Products
Abstract
To reduce power consumption and suppress display degradation of a liquid crystal display device. To suppress display degradation due to an external factor such as temperature. A transistor whose channel formation region is formed using an oxide semiconductor layer is used for a transistor provided in each pixel. Note that with the use of a high-purity oxide semiconductor layer, off-state current of the transistor at a room temperature can be 10 aA/μm or less and off-state current at 85° C. can be 100 aA/μm or less. Consequently, power consumption of a liquid crystal display device can be reduced and display degradation can be suppressed. Further, as described above, off-state current of the transistor at a temperature as high as 85° C. can be 100 aA/μm or less. Thus, display degradation of a liquid crystal display device due to an external factor such as temperature can be suppressed.
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Citations
12 Claims
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1. A transistor comprising an oxide semiconductor layer, wherein characteristics of the transistor comprises:
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an off-current being less than or equal to 10 aA/μ
m at room temperature; andan off-current being less than or equal to 100 aA/μ
m at a temperature of 85°
C. - View Dependent Claims (2, 3, 4)
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5. A liquid crystal display device comprising:
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a transistor comprising an oxide semiconductor layer; a liquid crystal element electrically connected to the transistor; and a capacitor configured to store voltage applied to the liquid crystal element, wherein characteristics of the transistor comprises; an off-current being less than or equal to 10 aA/μ
m at room temperature; andan off-current being less than or equal to 100 aA/μ
m at a temperature of 85°
C. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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Specification