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US 2018/0004353 A1Published application
Method and Circuit for Driving Touch Sensor and Display Device Using the Same
AssigneeLG Display Co., Ltd.
InventorSunkyung SHIN
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Abstract
A method and a circuit for driving a touch sensor measuring noise and a display device using the same are disclosed. The method of driving the touch sensor includes connecting sensor lines of a plurality of touch sensors to a sensing unit during a noise measurement portion, and driving the sensing unit at previously selected noise measurement frequencies in a state where the sensor lines are connected to the sensing unit or applying a signal of the noise measurement frequencies to the sensor lines to measure a noise of the touch sensors at each of the noise measurement frequencies.
Claims20
A method of driving a touch sensor comprising:
- connecting sensor lines of a plurality of touch sensors to a sensing unit during a noise measurement portion;
- and
- driving the sensing unit at previously selected noise measurement frequencies in a state where the sensor lines are connected to the sensing unit or applying a signal of the noise measurement frequencies to the sensor lines to measure a noise of the touch sensors at each of the noise measurement frequencies,
- wherein the noise measurement portion includes a plurality of sub-noise measurement portions,
- wherein noise measurement frequencies in at least two of the sub-noise measurement portions are different from each other, and
- wherein one cycle, in which a same frequency among the noise measurement frequencies is repeated, is equal to or greater than one frame period of a display device.
3 more elements
A method of driving a display device comprising:
- writing data of an input image to pixels of a display panel during a display period;
- and
- driving a sensing unit at previously selected noise measurement frequencies or applying a signal of the noise measurement frequencies to the sensor lines in a state where sensor lines of touch sensors are connected to the sensing unit to measure a noise of the touch sensors at each of the noise measurement frequencies during a noise measurement portion,
- wherein noise measurement frequencies in at least two of sub-noise measurement portions are different from each other, and
- wherein one cycle, in which a same frequency among the noise measurement frequencies is repeated, is equal to or greater than one frame period of the display device.
2 more elements
A touch sensor circuit comprising:
- a touch sensor driver configured to drive a sensing unit at previously selected noise measurement frequencies or apply a signal of the noise measurement frequencies to the sensor lines in a state where sensor lines of touch sensors are connected to the sensing unit during a noise measurement portion and measure a noise of the touch sensors at each of the noise measurement frequencies,
- wherein the noise measurement portion includes a plurality of sub-noise measurement portions,
- wherein noise measurement frequencies in at least two of the sub-noise measurement portions are different from each other, and
- wherein one cycle, in which the same frequency among the noise measurement frequencies is repeated, is equal to or greater than one frame period of the display device.
1 more element
A display device comprising:
- a display panel on which touch sensors and pixels are disposed;
- a display panel driver configured to write data of an input image to the pixels of the display panel during a display period;
- and
- a touch sensor driver configured to drive a sensing unit at previously selected noise measurement frequencies or apply a signal of the noise measurement frequencies to the sensor lines in a state where sensor lines of the touch sensors are connected to the sensing unit during a noise measurement portion and measure a noise of the touch sensors at each of the noise measurement frequencies,
- wherein the noise measurement portion includes a plurality of sub-noise measurement portions,
- wherein noise measurement frequencies in at least two of the sub-noise measurement portions are different from each other, and
- wherein one cycle, in which the same frequency among the noise measurement frequencies is repeated, is equal to or greater than one frame period of the display device.
4 more elements
Dependencies are inferred from the claim text.