Capacitive touch device, capacitive communication device and communication system
First Claim
1. A capacitive touch device, configured to perform a near field communication with an external touch panel, the capacitive touch device comprising:
- a touch panel comprising at least one sensing electrode configured to form a coupling electric field with the external touch panel, wherein the at least one sensing electrode is configured to output a detection signal according to the coupling electric field;
a detection circuit, coupled to the at least one sensing electrode, configured to modulate the detection signal respectively with two signals to generate two detection components; and
a processing unit configured to obtain a norm of vector according to the two detection components to accordingly identify a touch event, and obtain transmission data according to the two detection components by at least one of an amplitude demodulation, a phase demodulation and a frequency demodulation.
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Accused Products
Abstract
There is provided a capacitive touch device including a touch panel, a detection circuit and a processing unit. The touch panel includes a plurality of drive electrodes and a plurality of receiving electrodes configured to form a coupling electric field with an external touch panel, and the receiving electrodes are respectively configured to output a detection signal. The detection circuit is coupled to one of the receiving electrodes and configured to modulate the detection signal with two signals to generate two detection components. The processing unit is configured to obtain a phase value according to the two detection components to accordingly decode transmission data.
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Citations
20 Claims
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1. A capacitive touch device, configured to perform a near field communication with an external touch panel, the capacitive touch device comprising:
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a touch panel comprising at least one sensing electrode configured to form a coupling electric field with the external touch panel, wherein the at least one sensing electrode is configured to output a detection signal according to the coupling electric field; a detection circuit, coupled to the at least one sensing electrode, configured to modulate the detection signal respectively with two signals to generate two detection components; and a processing unit configured to obtain a norm of vector according to the two detection components to accordingly identify a touch event, and obtain transmission data according to the two detection components by at least one of an amplitude demodulation, a phase demodulation and a frequency demodulation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A communication system comprising:
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a first touch panel; and a second touch panel comprising; a plurality of drive electrodes and a plurality of receiving electrodes configured to form a coupling electric field with the first touch panel, wherein the receiving electrodes are respectively configured to output a second detection signal according to the coupling electric field; a second drive circuit, coupled to one of the drive electrodes, configured to output a phase-fixed drive signal or a modulated drive signal modulated by at least one of an amplitude modulation, a phase modulation and a frequency modulation to the drive electrode coupled thereto; a second detection circuit, coupled the receiving electrode associated with the drive electrode coupled to the second drive circuit, configured to modulate the second detection signal respectively with two signals to generate two detection components; and a second processing unit configured to obtain a norm of vector according to the two detection components to accordingly identify a touch event. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A capacitive communication device, configured to perform a near field communication with an external electric field, the capacitive communication device comprising:
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at least one receiving electrode, configured as a receiving antenna and configured to form a coupling electric field with the external electric field, wherein the receiving electrode is configured to output a detection signal according to the coupling electric field; a detection circuit, coupled to the at least one receiving electrode, configured to modulate the detection signal with at least one signal to generate at least one detection component; and a processing unit configured to obtain a phase value according to the at least one detection component to accordingly decode transmission data. - View Dependent Claims (19, 20)
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Specification