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US 12,755,711 B2Granted
Display device, method of driving the display device, and electronic device including the display device
AssigneeSamsung Display Co., Ltd.
InventorsJongdeuk Moon, Seung-Woon Shin, Ho Lee, Kyoungsoo Kim, Woon-Rok Jang
Life of this patent
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Abstract
A display device senses a driving current of each of pixels to determine a temperature of a display panel, and performs a stain compensation based on the temperature of the display panel. The display device determines whether the display panel has transitioned from a first deterioration state to a second deterioration state and an average grayscale of input image data is less than a grayscale threshold value, such that the display device reduces a sensing period of the sensing current.
Claims20
A display device, comprising:
- a display panel comprising pixels grouped into blocks;
- and
- a display panel driver configured to:
- sense a driving current of each of the pixels during a sensing period;
- determine a block temperature for each of the blocks based on a magnitude of the sensed driving current;
- determine whether after the display panel enters a first deterioration state in which a difference between a maximum value of the block temperature and an average value of the block temperature is greater than a first temperature threshold value, the display panel enters a second deterioration state in which the difference between the maximum value of the block temperature and the average value of the block temperature is less than a second temperature threshold value different from the first temperature threshold value, and an average grayscale of input image data is less than a grayscale threshold value;
- and
- output a data voltage compensated based on the block temperature to the pixels,
- wherein, based on a determination that the display panel has transitioned from the first deterioration state to the second deterioration state, and that the average grayscale of the input image data is less than the grayscale threshold value, the display panel driver is configured to reduce a time length of a next sensing period after the sensing period, to be less than a time length of the sensing period, and output the data voltage compensated based on the block temperature and the reduced time length of the next sensing period to the pixels.
6 more elements
A method of driving a display device, the method comprising:
- sensing a driving current of each of pixels included in a display panel during a sensing period, the pixels being grouped into blocks;
- determining a block temperature for each of the blocks based on the sensed driving current;
- determining whether the display panel enters a first deterioration state in which a difference between a maximum value of the block temperature and an average value of the block temperature is greater than a first temperature threshold value;
- determining whether the display panel enters a second deterioration state in which the difference between the maximum value of the block temperature and the average value of the block temperature is less than a second temperature threshold value different from the first temperature threshold value, and an average grayscale of input image data is less than a grayscale threshold value;
- and
- based on a determination that the display panel has transitioned from the first deterioration state to the second deterioration state, and the average grayscale of the input image data is less than the grayscale threshold value, reducing a time length of a next sensing period after the sensing period to be less than a time length of the sensing period, and outputting a data voltage compensated based on the block temperature and the reduced time length of the next sensing period to the pixels.
3 more elements
An electronic device, comprising:
- a display panel comprising pixels grouped into blocks;
- a display panel driver configured to:
- sense a driving current of each of the pixels during a sensing period;
- determine a block temperature for each of the blocks based on a magnitude of the sensed driving current;
- determine whether after the display panel enters a first deterioration state in which a difference between a maximum value of the block temperature and an average value of the block temperature is greater than a first temperature threshold value, the display panel enters a second deterioration state in which the difference between the maximum value of the block temperature and the average value of the block temperature is less than a second temperature threshold value different from the first temperature threshold value, and an average grayscale of input image data is less than a grayscale threshold value;
- and
- output a data voltage compensated based on the block temperature to the pixels;
- and
- a processor configured to control the display panel driver,
- wherein, based on a determination that the display panel has transitioned from the first deterioration state to the second deterioration state, and that the average grayscale of the input image data is less than the grayscale threshold value, the display panel driver is configured to reduce a time length of a next sensing period after the sensing period, to be less than a time length of the sensing period, and output the data voltage compensated based on the block temperature and the reduced time length of the next sensing period to the pixels.
7 more elements
Dependencies are inferred from the claim text.