Touch Sensor Device and Method
First Claim
1. A capacitive touch sensor device comprising:
- a substrate layer; and
a plurality of resonant circuits, each comprising at least one respective electrode, the electrodes of the plurality of resonant circuits being distributed on the substrate layer, andeach of the plurality of resonant circuits having a respective resonance frequency that is unique within the plurality of resonant circuits.
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Accused Products
Abstract
A common capacitive touch sensor may have a two dimensional array of transparent conductive strips going from edge to edge on a substrate layer or sheet of a touch sensor. According to some aspects, there is provided a capacitive touch sensor device including a substrate layer and a plurality of resonant circuits. Each resonant circuit includes an electrode, and each resonant circuit has a respective resonance frequency that is unique within the plurality of resonant circuits. The electrodes of the resonant circuits are distributed on the substrate layer. A controller for a touch sensor is also provided that includes a signal generator to drive at least one plurality of resonant circuits, where each resonant circuit has a respective resonance frequency. The signal generator is tunable to generate input signals at each of the resonance frequencies. The controller also includes a detector.
33 Citations
25 Claims
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1. A capacitive touch sensor device comprising:
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a substrate layer; and a plurality of resonant circuits, each comprising at least one respective electrode, the electrodes of the plurality of resonant circuits being distributed on the substrate layer, and each of the plurality of resonant circuits having a respective resonance frequency that is unique within the plurality of resonant circuits. - 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. A method for a capacitive touch sensor comprising at least one plurality of resonant circuits, each plurality of resonant circuits having a respective plurality of resonance frequencies, the method comprising:
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for each said at least one plurality of resonant circuits; sequentially generating signals at each of the respective plurality of resonance frequencies for driving the plurality of resonant circuits; and measuring an output of the plurality of resonant circuits. - View Dependent Claims (20)
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21. A controller for a capacitive touch sensor comprising at least one plurality of resonant circuits, each plurality of resonant circuits having a respective plurality of resonance frequencies, the controller comprising:
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a signal generator to drive the at least one plurality of resonant circuits, the signal generator being tunable to selectively generate signals at each of the resonance frequencies for driving the at least one plurality of resonant circuits; and a detector to measure output the at least one plurality of resonant circuits. - View Dependent Claims (22, 23, 24, 25)
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Specification