Liquid crystal display device and electronic apparatus having the same
First Claim
1. A liquid crystal display device comprising:
- a display panel comprising;
a driver circuit portion comprising a driver circuit; and
a pixel portion comprising a plurality of pixels; and
a display control circuit capable of stopping supply of an image signal and a control signal to the display panel during displaying a still image in the pixel portion,wherein each pixel of the plurality of pixels comprises;
a first transistor comprising;
an insulating layer; and
an oxide semiconductor layer over the insulating layer; and
a liquid crystal element,wherein the oxide semiconductor layer comprises indium, gallium, and zinc, andwherein an off-state current per micrometer of a channel width of the first transistor is 1×
10−
16 A/μ
m or lower at a drain voltage of 6V and a gate voltage of −
5V or −
10V.
1 Assignment
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Accused Products
Abstract
A liquid crystal display device includes: a driver circuit portion; a pixel portion; a signal generation circuit for generating a control signal for driving the driver circuit portion and an image signal which is supplied to the pixel portion; a memory circuit; a comparison circuit for detecting a difference of image signals for a series of frame periods among image signals stored for respective frame periods in the memory circuit; a selection circuit which selects and outputs the image signals for the series of frame periods when the difference is detected in the comparison circuit; and a display control circuit which supplies the control signal and the image signals output from the selection circuit, to the driver circuit portion when the difference is detected in the comparison circuit, and stops supplying the control signal to the driver circuit portion when the difference is not detected in the comparison circuit.
245 Citations
32 Claims
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1. A liquid crystal display device comprising:
-
a display panel comprising; a driver circuit portion comprising a driver circuit; and a pixel portion comprising a plurality of pixels; and a display control circuit capable of stopping supply of an image signal and a control signal to the display panel during displaying a still image in the pixel portion, wherein each pixel of the plurality of pixels comprises; a first transistor comprising; an insulating layer; and an oxide semiconductor layer over the insulating layer; and a liquid crystal element, wherein the oxide semiconductor layer comprises indium, gallium, and zinc, and wherein an off-state current per micrometer of a channel width of the first transistor is 1×
10−
16 A/μ
m or lower at a drain voltage of 6V and a gate voltage of −
5V or −
10V. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A liquid crystal display device comprising:
-
a display panel comprising; a driver circuit portion comprising a driver circuit; and a pixel portion comprising a plurality of pixels; and a display control circuit capable of stopping supply of an image signal and a control signal to the display panel during displaying a still image in the pixel portion, wherein each pixel of the plurality of pixels comprises; a first transistor comprising; an insulating layer; and an oxide semiconductor layer over the insulating layer; a liquid crystal element, and a storage capacitor, wherein the oxide semiconductor layer comprises indium, gallium, and zinc, and wherein an off-state current per micrometer of a channel width of the first transistor is 1×
10−
16 A/μ
m or lower at a drain voltage of 6V and a gate voltage of −
5V or −
10V. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification