TOUCH SENSING METHOD AND TOUCH SENSING APPARATUS
First Claim
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1. A touch sensing method comprising:
- calibrating an offset value;
obtaining sensed data from a panel unit;
performing a difference operation on the sensed data and the offset value to calculate valid data;
when the valid data is higher than a first threshold value, calculating a correlation value between the valid data and reference data; and
comparing the correlation value with a second threshold value to determine whether to update the offset value and whether to filter the valid data.
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Abstract
There are provided a touch sensing method and a touch sensing apparatus. The touch sensing method includes calibrating an offset value; obtaining sensed data from a panel unit, performing a difference operation on the sensed data and the offset value to calculate valid data, when the valid data is higher than a first threshold value, calculating a correlation value between the valid data and reference data, and comparing the correlation value with a second threshold value to determine whether to update the offset value and whether to filter the valid data.
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Citations
18 Claims
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1. A touch sensing method comprising:
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calibrating an offset value;
obtaining sensed data from a panel unit;performing a difference operation on the sensed data and the offset value to calculate valid data; when the valid data is higher than a first threshold value, calculating a correlation value between the valid data and reference data; and comparing the correlation value with a second threshold value to determine whether to update the offset value and whether to filter the valid data. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A touch sensing apparatus comprising:
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a reference data calculation unit calculating reference data applied to each of an offset value and sensed data obtained from a panel unit; a valid data calculation unit performing a difference operation on the sensed data and the offset value to calculate valid data; and a calculation unit calculating a correlation value between the valid data and the reference data when the valid data is higher than a first threshold value, wherein the calculation unit determines whether to update the offset value and whether to filter the valid data by comparing the correlation value with a second threshold value. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A touch sensing apparatus comprising:
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a plurality of first electrodes extending in a first axial direction; a plurality of second electrodes extending in a second axial direction intersecting the first axial direction; and a controller integrated circuit (IC) detecting a change in capacitance generated between the plurality of first electrodes and the plurality of second electrodes, wherein the controller IC obtains valid data by subtracting an offset value from sensed data generated from the change in capacitance, and when the valid data is higher than a first threshold value, the controller IC calculates a correlation value between the valid data and reference data, and determines whether to filter the valid data by comparing the correlation value with a second threshold value. - View Dependent Claims (15, 16, 17, 18)
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Specification