FRONT-END SIGNAL COMPENSATION
First Claim
1. A touch sensor panel for generating compensated touch signals, comprising:
- a plurality of first electrodes including one or more touch-sensitive first electrodes and one or more touch-insensitive first electrodes; and
a plurality of second electrodes;
wherein the plurality of second electrodes include one or more shielding portions configured for substantially covering an entirety of the one or more touch-insensitive first electrodes.
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Accused Products
Abstract
A touch surface device having improved sensitivity and dynamic range is disclosed. In one embodiment, the touch surface device includes a touch-sensitive panel having at least one sense node for providing an output signal indicative of a touch or no-touch condition on the panel; a compensation circuit, coupled to the at least one sense node, for generating a compensation signal that when summed with the output signal removes an undesired portion of the output signal so as to generated a compensated output signal; and an amplifier having an inverting input coupled to the output of the compensation circuit and a non-inverting input coupled to a known reference voltage.
12 Citations
20 Claims
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1. A touch sensor panel for generating compensated touch signals, comprising:
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a plurality of first electrodes including one or more touch-sensitive first electrodes and one or more touch-insensitive first electrodes; and a plurality of second electrodes; wherein the plurality of second electrodes include one or more shielding portions configured for substantially covering an entirety of the one or more touch-insensitive first electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for generating compensated touch signals, comprising:
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forming a plurality of first electrodes including one or more touch-sensitive first electrodes and one or more touch-insensitive first electrodes; forming a plurality of second electrodes; and substantially covering an entirety of the one or more touch-insensitive first electrodes with one or more shielding portions of the plurality of second electrodes. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A touch sensor panel for generating compensated touch signals, comprising:
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a plurality of first electrodes; a plurality of second electrodes; and means for rendering one or more of the first electrodes touch-insensitive. - View Dependent Claims (19, 20)
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Specification