Liquid crystal display device and driving method of the same
First Claim
1. A liquid crystal display device comprising:
- a data line configured to be supplied with an image signal;
a pixel comprising a liquid crystal element and a transistor which is electrically connected to the liquid crystal element and the data line;
a gate line capable of switching the transistor between an on state and an off state; and
a protection circuit electrically connected to the data line,wherein the protection circuit is configured to supply a first potential to the data line when the transistor is in the on state and to supply a second potential to the data line when the transistor is in the off state, andwherein the first potential is lower than a minimum potential of the image signal and the second potential is substantially the same as the minimum potential of the image signal.
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Accused Products
Abstract
Provided is a liquid crystal display device having a pixel including a transistor and a liquid crystal element and a protection circuit electrically connected to one of a source and a drain of the transistor through a data line. The protection circuit includes a first terminal supplied with a first power supply potential and a second terminal supplied with a second power supply potential higher than the first power supply potential. In a moving image display mode, an image signal is input from the data line to the liquid crystal element through the transistor, and the first power supply potential is set at the first potential. In a still image display mode, supply of the image signal is stopped, and the first power supply potential is set at the second potential. The second potential is substantially the same as the minimum value of the image signal.
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Citations
12 Claims
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1. A liquid crystal display device comprising:
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a data line configured to be supplied with an image signal; a pixel comprising a liquid crystal element and a transistor which is electrically connected to the liquid crystal element and the data line; a gate line capable of switching the transistor between an on state and an off state; and a protection circuit electrically connected to the data line, wherein the protection circuit is configured to supply a first potential to the data line when the transistor is in the on state and to supply a second potential to the data line when the transistor is in the off state, and wherein the first potential is lower than a minimum potential of the image signal and the second potential is substantially the same as the minimum potential of the image signal. - View Dependent Claims (2, 3, 4, 5)
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6. A driving method of a liquid crystal display device comprising:
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judging whether the liquid crystal display device displays a moving image or a still image; switching a transistor in a pixel of the liquid crystal display device to an off state if the liquid crystal display device is judged to display the still image, wherein the transistor is configured to control supply of an image signal from a data line to a liquid crystal element in the liquid crystal display device; and supplying a first potential to the data line while maintaining the off state of the transistor, wherein the first potential is substantially the same as a minimum potential of the image signal. - View Dependent Claims (7, 8, 9)
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10. A liquid crystal display device comprising a plurality of pixels each of which comprises a liquid crystal element, the liquid crystal display device comprising:
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means for judging whether the liquid crystal display device displays a moving image or a still image; means for stopping supplying an image signal from a data line to the liquid crystal element when the liquid crystal display device is judged to display the still image; and means for holding the image signal in the liquid crystal element when the liquid crystal display device is judged to display the still image, wherein the means for holding the image signal is capable of supplying a potential to the data line when the liquid crystal display device is judged to display the still image, and wherein the potential is substantially the same as a minimum potential of the image signal. - View Dependent Claims (11, 12)
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Specification