Touch sensing device and touchscreen device
First Claim
1. A touch sensing device comprising:
- a plurality of driving electrodes extended in a first axial direction;
a plurality of sensing electrodes extended in a second axial direction intersecting with the first axial direction;
an integrating circuit unit generating a first analog signal by integrating a change in capacitance generated in a first sensing electrode among the plurality of sensing electrodes and generating a second analog signal from a change in capacitance generated in a second sensing electrode adjacent to the first sensing electrode; and
a subtracting unit calculating a difference in levels between the first and second analog signals, wherein in the first and second analog signals having opposing polarities, the integrating circuit unit inverts the polarities of the first and second analog signals by changing a positive polarity to a negative polarity for the first analog signal and changing a negative polarity to a positive polarity for the second analog signal in response to a reset section of the integrating circuit unit.
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Accused Products
Abstract
There are provided a touch sensing device and a touchscreen device, the touch sensing device including a plurality of driving electrodes extended in a first axial direction, a plurality of sensing electrodes extended in a second axial direction intersecting with the first axial direction, an integrating circuit unit generating a first analog signal by integrating a change in capacitance generated in a first sensing electrode among the plurality of sensing electrodes and generating a second analog signal from a change in capacitance generated in a second sensing electrode adjacent to the first sensing electrode, and a subtracting unit calculating a difference in levels between the first and second analog signals.
8 Citations
11 Claims
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1. A touch sensing device comprising:
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a plurality of driving electrodes extended in a first axial direction; a plurality of sensing electrodes extended in a second axial direction intersecting with the first axial direction; an integrating circuit unit generating a first analog signal by integrating a change in capacitance generated in a first sensing electrode among the plurality of sensing electrodes and generating a second analog signal from a change in capacitance generated in a second sensing electrode adjacent to the first sensing electrode; and a subtracting unit calculating a difference in levels between the first and second analog signals, wherein in the first and second analog signals having opposing polarities, the integrating circuit unit inverts the polarities of the first and second analog signals by changing a positive polarity to a negative polarity for the first analog signal and changing a negative polarity to a positive polarity for the second analog signal in response to a reset section of the integrating circuit unit. - View Dependent Claims (2, 3, 4)
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5. A touchscreen device comprising:
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a panel unit including a plurality of driving electrodes, a plurality of sensing electrodes, and a plurality of node capacitors formed in intersections between the plurality of driving electrodes and the plurality of sensing electrodes; a driving circuit unit applying a driving signal having a predetermined driving period to each of the plurality of driving electrodes; a sensing circuit unit connected to the plurality of sensing electrodes to detect changes in capacitance in the plurality of node capacitors; and a signal processing unit converting an output of the sensing circuit unit into a digital signal to determine a touch input, wherein the sensing circuit unit calculates a difference between a first analog signal and second analog signal generated in changes in capacitance in node capacitors formed in the sensing electrodes adjacent to each other among the plurality of node capacitors, wherein in the first and second analog signals having opposing polarities, the integrating circuit unit inverts the polarities of the first and second analog signals by changing a positive polarity to a negative polarity for the first analog signal and changing a negative polarity to a positive polarity for the second analog signal in response to a reset section of the sensing circuit unit. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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Specification