CAPACITANCE SENSING APPARATUS AND TOUCH SCREEN APPARATUS
First Claim
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1. A capacitance sensing apparatus, comprising:
- a driving circuit unit applying a driving signal having a predetermined cycle to a first capacitor; and
a sensing circuit unit sensing a change in capacitance generated in the first capacitor based on the driving signal,wherein a portion of a plurality of switches included in the sensing circuit unit operate at a first cycle, the same as the cycle of the driving signal, and remaining switches among the plurality of switches operate at a second cycle, different from the first cycle.
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Abstract
There is provided a capacitance sensing apparatus including a driving circuit unit applying a driving signal to a first capacitor at a predetermined interval; and a sensing circuit unit sensing a change in capacitance generated by the first capacitor based on the driving signal, in which a portion of a plurality of switches included in the sensing circuit unit operate at a first interval, the same as the interval of the driving signal, and remaining switches among the plurality of switches operate at a second interval, different from the first interval.
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Citations
14 Claims
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1. A capacitance sensing apparatus, comprising:
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a driving circuit unit applying a driving signal having a predetermined cycle to a first capacitor; and a sensing circuit unit sensing a change in capacitance generated in the first capacitor based on the driving signal, wherein a portion of a plurality of switches included in the sensing circuit unit operate at a first cycle, the same as the cycle of the driving signal, and remaining switches among the plurality of switches operate at a second cycle, different from the first cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A touch screen apparatus, comprising:
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a panel unit including a plurality of driving electrodes and a plurality of sensing electrodes; a driving circuit unit applying driving signals to the plurality of driving electrodes, respectively; a sensing circuit unit sensing changes in capacitance generated in intersections between the plurality of sensing electrodes and the driving electrodes to which the driving signals are applied; and a controller controlling operations of the driving circuit unit and the sensing circuit unit, wherein a portion of a plurality of switches included in the sensing circuit unit operate at a first cycle, the same as the cycle of the driving signals, and remaining switches among the plurality of switches operate at a second cycle, different from the first cycle. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification