TOUCHSCREEN APPARATUS AND METHOD OF SENSING TOUCH
First Claim
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1. A touchscreen apparatus comprising:
- a panel unit including a plurality of first electrodes and a plurality of second electrodes intersecting with the plurality of first electrodes; and
a calculating unit obtaining a plurality of pieces of digital data generated from capacitance of node capacitors formed in intersections between the plurality of first electrodes and the plurality of second electrodes,wherein the calculating unit calculates a noise reference level of a current frame using a plurality of pieces of digital data of the current frame and a plurality of pieces of digital data of a previous frame.
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Abstract
A touchscreen apparatus may include: a panel unit including a plurality of first electrodes and a plurality of second electrodes intersecting with the plurality of first electrodes, and a calculating unit obtaining a plurality of pieces of digital data generated from capacitance of node capacitors formed in intersections between the plurality of first electrodes and the plurality of second electrodes. The calculating unit calculates a noise reference level of a current frame using a plurality of pieces of digital data of the current frame and a plurality of pieces of digital data of a previous frame.
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Citations
22 Claims
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1. A touchscreen apparatus comprising:
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a panel unit including a plurality of first electrodes and a plurality of second electrodes intersecting with the plurality of first electrodes; and a calculating unit obtaining a plurality of pieces of digital data generated from capacitance of node capacitors formed in intersections between the plurality of first electrodes and the plurality of second electrodes, wherein the calculating unit calculates a noise reference level of a current frame using a plurality of pieces of digital data of the current frame and a plurality of pieces of digital data of a previous frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of sensing a touch, the method comprising:
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obtaining a plurality of pieces of digital data; calculating a standard deviation value for digital data having a first threshold or above, to lower than a second threshold among the plurality of pieces of digital data; and calculating a noise reference level of a current frame using the standard deviation value of the current frame and the standard deviation value of a previous frame. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification