TOUCH SENSING APPARATUS AND METHOD
First Claim
1. A touch sensing method, comprising:
- sensing a first sensing value including an offset component per touch node using a read out signal of a touch sensor, the touch sensor not being supplied with a driving pulse, in a first sensing period;
sensing a second sensing value including the offset component of the touch node and a mutual capacitive component based on whether a touch is performed, using a read out signal of the touch sensor, the touch sensor being supplied with a driving pulse, in a second sensing period; and
acquiring touch data from which the offset component is removed via a differential operation of the second sensing value and the first sensing value.
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Abstract
A touch sensing apparatus and method for correctly sensing a touch signal by removing an offset per touch node via differential sensing are discussed. The touch sensing method includes sensing a first sensing value including an offset component per touch node using a read out signal of a touch sensor, the touch sensor not being supplied with a driving pulse, in a first sensing period; sensing a second sensing value including the offset component of the touch node and a mutual capacitive component based on whether a touch is performed, using a read out signal of the touch sensor, the touch sensor being supplied with a driving pulse, in a second sensing period; and acquiring touch data from which the offset component is removed via a differential operation of the second sensing value and the first sensing value.
47 Citations
7 Claims
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1. A touch sensing method, comprising:
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sensing a first sensing value including an offset component per touch node using a read out signal of a touch sensor, the touch sensor not being supplied with a driving pulse, in a first sensing period; sensing a second sensing value including the offset component of the touch node and a mutual capacitive component based on whether a touch is performed, using a read out signal of the touch sensor, the touch sensor being supplied with a driving pulse, in a second sensing period; and acquiring touch data from which the offset component is removed via a differential operation of the second sensing value and the first sensing value. - View Dependent Claims (2, 3)
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4. A touch sensing apparatus comprising:
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a touch sensor for outputting a read out signal indicating capacitance change based on a presence of touch; and a touch controller for sensing a first sensing value including an offset component per touch node using a read out signal of the touch sensor, the touch sensor not being supplied with a driving pulse in a first sensing period, sensing a second sensing value including the offset component of the touch node and a mutual capacitive component based on whether a touch is performed, using a read out signal of the touch sensor, the touch sensor being supplied with a driving pulse, in a second sensing period, and acquiring touch data from which the offset component is removed via a differential operation of the second sensing value and the first sensing value. - View Dependent Claims (5, 6, 7)
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Specification