Apparatus for object information detection and methods of using same
First Claim
1. A method for detecting an object on a sensor sensitive to capacitive coupling, the method comprising:
- simultaneously transmitting signals on at least two electrodes of the sensor, wherein at least one of the signals transmitted on each of the at least two electrodes has a frequency that is different from a frequency of at least one other signal transmitted on another electrode of the at least two electrodes;
sampling a signal on at least one other electrode crossing the at least two electrodes, wherein the signal is responsive to capacitive coupling formed between the at least two electrodes and the at least one other crossing electrode; and
detecting at least one object from the sampled signals.
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Abstract
A method for detecting an object on a sensor sensitive to capacitive coupling comprises simultaneously transmitting signals on at least two electrodes of the sensor, wherein at least one of the signals transmitted on each of the at least two electrodes has a frequency that is different from a frequency of at least one other signal transmitted on another electrode of the at least two electrodes, sampling a signal on at least one other electrode crossing the at least two electrodes, wherein the signal is responsive to capacitive coupling formed between the at least two electrodes and the at least one other crossing electrode, and detecting at least one object from the sampled signals.
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Citations
31 Claims
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1. A method for detecting an object on a sensor sensitive to capacitive coupling, the method comprising:
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simultaneously transmitting signals on at least two electrodes of the sensor, wherein at least one of the signals transmitted on each of the at least two electrodes has a frequency that is different from a frequency of at least one other signal transmitted on another electrode of the at least two electrodes; sampling a signal on at least one other electrode crossing the at least two electrodes, wherein the signal is responsive to capacitive coupling formed between the at least two electrodes and the at least one other crossing electrode; and detecting at least one object from the sampled signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus including a sensor sensitive to capacitive coupling comprising:
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a sensor including an array of active electrodes and an array of passive electrodes, the active and passive array forming a grid; a switching apparatus operative to simultaneously transmit signals on at least two active electrodes, wherein at least one of the signals simultaneously transmitted on each of the at least two active electrodes has a frequency that is different from a frequency of a signal transmitted on another electrode of the at least two active electrodes; and sensor electronics configured to sample an output signal on at least one passive electrode crossing the at least two active electrodes, wherein the output signal is responsive to capacitive coupling formed between the at least two active electrodes and the at least one passive electrode; wherein the output signal provides information regarding at least one object located on the sensor. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification