Method for driving display device and liquid crystal display device
First Claim
1. A method for driving a display device comprising the steps of:
- supplying an image signal of a still image from a display control circuit to a driver circuit portion;
writing a data of the image signal from the driver circuit portion into a pixel;
after writing the data of the image signal, holding the data written into the pixel by stopping a supply of a signal for operating the driver circuit portion from the display control circuit to the driver circuit portion for a period; and
after the period, restarting the supply of the signal for operating the driver circuit portion from the display control circuit to the driver circuit portion to write the data of the image signal of the still image from the driver circuit portion into the pixel;
wherein a length of the period from a step of stopping the supply of the signal for operating the driver circuit portion to a step of restarting the supply of the signal for operating the driver circuit portion is set in accordance with a temperature of the display device detected by a temperature detection circuit in the display device, andwherein the pixel is configured to display the still image in the period.
1 Assignment
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Accused Products
Abstract
The still image display mode includes a first period of writing the data of the image signal from the driver circuit portion into the pixel; after the first period, a second period of stopping supply of a signal or voltage for operating the driver circuit portion to the driver circuit portion; and after the second period, a third period of restarting the supply of a signal or voltage for operating the driver circuit portion to the driver circuit portion and writing the data of the image signal into the pixel from the driver circuit portion, so that the pixel keeps displaying a still image. A length of a period from the stop of the supply of the signal for operating the driver circuit portion to the driver circuit portion to the restart is set in accordance with a temperature of the display device.
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Citations
22 Claims
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1. A method for driving a display device comprising the steps of:
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supplying an image signal of a still image from a display control circuit to a driver circuit portion; writing a data of the image signal from the driver circuit portion into a pixel; after writing the data of the image signal, holding the data written into the pixel by stopping a supply of a signal for operating the driver circuit portion from the display control circuit to the driver circuit portion for a period; and after the period, restarting the supply of the signal for operating the driver circuit portion from the display control circuit to the driver circuit portion to write the data of the image signal of the still image from the driver circuit portion into the pixel; wherein a length of the period from a step of stopping the supply of the signal for operating the driver circuit portion to a step of restarting the supply of the signal for operating the driver circuit portion is set in accordance with a temperature of the display device detected by a temperature detection circuit in the display device, and wherein the pixel is configured to display the still image in the period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A liquid crystal display device comprising:
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a display panel comprising a driver circuit portion and a pixel; and a display control circuit configured to receive an image signal, a first control signal, a power supply voltage and a second control signal, and selectively start or stop an output of a start signal, an output of a clock signal, and an output of the power supply voltage to the display control circuit sequentially on a basis of the first control signal and the second control signal, wherein the driver circuit portion is configured to receive the output of the image signal, the start signal, the clock signal, and the power supply voltage from the display control circuit, wherein the pixel is configured to receive the image signal from the driver circuit portion, wherein the first control signal is a signal based on the image signal, and wherein the second control signal is a signal based on a temperature of the liquid crystal display device. - View Dependent Claims (10, 11, 12)
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13. A liquid crystal display device comprising:
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a display panel comprising a driver circuit portion and a pixel; a memory circuit configured to sequentially store a data of a first image signal and a data of a second image signal; a comparison circuit configured to compare the data of the first image signal and the data of the second image signal to generate a first control signal; a selection circuit configured to read out the data of a third image signal on a basis of the first control signal to output the data of the third image signal; a correction circuit configured to detect a temperature of the liquid crystal display device to generate a second control signal; and a display control circuit configured to receive a power supply voltage, the first control signal, the second control signal, and the third image signal, and selectively start or stop an output of the third image signal, an output of a start signal, an output of a clock signal, and an output of the power supply voltage to the driver circuit portion sequentially on a basis of the first control signal and the second control signal , wherein the driver circuit portion is configured to receive the output of the third image signal, the start signal, the clock signal, and the power supply voltage from the display control circuit, wherein the pixel is configured to display an image corresponding to the third image signal, wherein the first image signal and the second image signal are image signals in successive frame periods, and wherein the third image signal is the first image signal or the second image signal. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A liquid crystal display device comprising:
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a display panel comprising a driver circuit portion and a pixel; a memory circuit configured to sequentially store a data of a first image signal and a data of a second image signal; a comparison circuit configured to compare the data of the first image signal and the data of the second image signal to generate a first control signal; a selection circuit configured to read out the data of the first image signal to output the first image signal; a correction circuit configured to detect a temperature of the liquid crystal display device to generate a second control signal; and a display control circuit configured to receive a power supply voltage, the first control signal, the second control signal, and the first image signal, and sequentially stop an output of a start signal, an output of a clock signal, and an output of the power supply voltage to the driver circuit portion, wherein the driver circuit portion is configured to stop an operation while the display control circuit stops at least one of the output of the start signal, the output of the clock signal, and the output of the power supply voltage to the driver circuit portion, wherein the pixel is configured to display an image corresponding to the first image signal while the display control circuit stops the output of the start signal, the output of the clock signal, and the output of the power supply voltage to the driver circuit portion, and wherein the first image signal and the second image signal are image signals in successive frame periods. - View Dependent Claims (20)
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21. A method for driving a display device comprising an image processing circuit, a display control circuit, a correction circuit, a driver circuit and a pixel, the method comprising the steps of:
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outputting a first signal from the image processing circuit, the first signal including data for displaying a still image; outputting a second signal from the correction circuit, the second signal including data of a length of a holding period of the still image; inputting the first signal and the second signal to the display control circuit; outputting a third signal from the display control circuit, the third signal including data for displaying the still image, inputting the third signal to the driver circuit, outputting a fourth signal from the driver circuit, the fourth signal including data for displaying the still image, inputting the fourth signal to the pixel and then holding the fourth signal input to the pixel during the holding period whereby the still image is displayed during the holding period, wherein the display control circuit stops a supply of a power supply voltage to the driver circuit during the holding period, and wherein the length of the holding period is set based on a temperature of the display device detected by the correction circuit. - View Dependent Claims (22)
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Specification