Touch sensor and a display device including the same
First Claim
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1. A touch sensor comprising:
- a plurality of driving electrodes;
a plurality of sensing electrodes that intersect the plurality of driving electrodes;
a driver configured to substantially simultaneously supply driving signals to at least some of the plurality of driving electrodes;
a sensing unit configured to detect sensing signals from the plurality of sensing electrodes; and
a touch controller configured to control the driver so that the number of driving electrodes to which the driving signals are supplied in a first driving period is different from the number of driving electrodes to which the driving signals are supplied in a second driving period,wherein the number of driving electrodes to which the driving signals are supplied in the second driving period is larger than the number of driving electrodes to which the driving signals are supplied in the first driving period,wherein the touch controller determines magnitudes of noises from the sensing signals and controls the driver so that the number of driving electrodes to which the driving signals are supplied varies in accordance with the determined magnitudes of the noises, andwherein, when the magnitudes of the noises are greater than or equal to a predetermined reference value, the touch controller increases the number of driving electrodes to which the driving signals are supplied.
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Abstract
A touch sensor includes a plurality of driving electrodes, a plurality of sensing electrodes that intersect the plurality of driving electrodes, a driver configured to substantially simultaneously supply driving signals to at least some of the plurality of driving electrodes, a sensing unit configured to detect sensing signals from the plurality of sensing electrodes, and a touch controller configured to control the driver so that the number of driving electrodes to which the driving signals are supplied in a first driving period is different from the number of driving electrodes to which the driving signals are supplied in a second driving period.
43 Citations
14 Claims
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1. A touch sensor comprising:
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a plurality of driving electrodes; a plurality of sensing electrodes that intersect the plurality of driving electrodes; a driver configured to substantially simultaneously supply driving signals to at least some of the plurality of driving electrodes; a sensing unit configured to detect sensing signals from the plurality of sensing electrodes; and a touch controller configured to control the driver so that the number of driving electrodes to which the driving signals are supplied in a first driving period is different from the number of driving electrodes to which the driving signals are supplied in a second driving period, wherein the number of driving electrodes to which the driving signals are supplied in the second driving period is larger than the number of driving electrodes to which the driving signals are supplied in the first driving period, wherein the touch controller determines magnitudes of noises from the sensing signals and controls the driver so that the number of driving electrodes to which the driving signals are supplied varies in accordance with the determined magnitudes of the noises, and wherein, when the magnitudes of the noises are greater than or equal to a predetermined reference value, the touch controller increases the number of driving electrodes to which the driving signals are supplied. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A display device comprising:
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a display unit configured to display an image using image data; and a touch sensor that overlaps the display unit, wherein the touch sensor comprises; a plurality of driving electrodes; a plurality of sensing electrodes that intersect the plurality of driving electrodes; a driver configured to substantially simultaneously supply driving signals to at least some of the plurality of driving electrodes; a sensing unit configured to detect sensing signals from the plurality of sensing electrodes; a touch controller configured to control the driver so that the number of driving electrodes to which the driving signals are supplied in a first driving period is different from the number of driving electrodes to which the driving signals are supplied in a second driving period; and a data analyzing unit configured to analyze the image data and to determine noise patterns, wherein the touch controller controls the driver so that the number of driving electrodes to which the driving signals are supplied varies in accordance with presence of the noise patterns, and wherein the data analyzing unit compares the image data in units of horizontal lines and determines the image data as the noise patterns when a comparison result is greater than or equal to a reference difference value. - View Dependent Claims (8, 9)
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10. A method of operating a touch sensor comprising a plurality of driving electrodes and a plurality of sensing electrodes that intersect the plurality of driving electrodes, the method comprising:
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detecting sensing signals from the plurality of sensing electrodes; determining magnitudes of noises from the sensing signals; determining whether the magnitudes of noises is less than a predetermined reference value; determining a select number of the plurality of driving electrodes to supply driving signals in response to determining whether the magnitude of noises is less than the predetermined reference value; and supplying the driving signals to the select number of the plurality of driving electrodes at substantially the same time, wherein the select number of the plurality of driving electrodes when it is determined that the magnitude of noises is less than the predetermined reference value is a first number, the select number of the plurality of driving electrodes when it is determined that the magnitude of noises is greater than or equal to the predetermined reference value is a second number, and the first number is less than the second number. - View Dependent Claims (11, 12, 13, 14)
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Specification