Display device
First Claim
Patent Images
1. A display device comprising:
- a display element;
a first transistor electrically connected to a first electrode of the display element; and
a second transistor electrically connected to a second electrode of the display element,wherein each of the first transistor and the second transistor comprises an oxide semiconductor layer,wherein an off current per micrometer in channel width of each of the first transistor and the second transistor is lower than 10 zA/μ
m at room temperature and lower than 100 zA/μ
m at 85°
C.
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Abstract
A driver circuit portion of a display device has a function in which image signals are written to a selected pixel successively so as to display an image on a screen and a function in which writing operation of an image signal is stopped and a transistor is turned off so as to maintain one image written to the screen when the one image is continuously displayed on the screen. Such functions are achieved by a transistor whose off current per micrometer in channel width is reduced to an extremely low value that is lower than 10 zA/μm at room temperature and lower than 100 zA/μm at 85° C.
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Citations
28 Claims
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1. A display device comprising:
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a display element; a first transistor electrically connected to a first electrode of the display element; and a second transistor electrically connected to a second electrode of the display element, wherein each of the first transistor and the second transistor comprises an oxide semiconductor layer, wherein an off current per micrometer in channel width of each of the first transistor and the second transistor is lower than 10 zA/μ
m at room temperature and lower than 100 zA/μ
m at 85°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A display device comprising:
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a display element in a pixel portion; a first transistor electrically connected to a first electrode of the display element, the first transistor provided in the pixel portion; and a second transistor electrically connected to a second electrode of the display element, the second transistor provided outside the pixel portion, wherein each of the first transistor and the second transistor comprises an oxide semiconductor layer, wherein an off current per micrometer in channel width of each of the first transistor and the second transistor is lower than 10 zA/μ
m at room temperature and lower than 100 zA/μ
m at 85°
C. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A display device comprising:
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a display element; a transistor electrically connected to an electrode of the display element, wherein the transistor comprises an oxide semiconductor layer, wherein an off current per micrometer in channel width of the transistor is lower than 10 zA/μ
m at room temperature and lower than 100 zA/μ
m at 85°
C. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification