Single layer transcapacitive sensing
First Claim
1. A transcapacitive sensor device comprising:
- a sensor substrate;
a first set of sensor electrodes disposed on a first surface of said sensor substrate, wherein individual sensor electrodes of said first set of sensor electrodes are substantially parallel to a first axis, and wherein said individual sensor electrodes of said first set of sensor electrodes are substantially identical to one another;
a second set of sensor electrodes disposed on said first surface of said sensor substrate, said second set of sensor electrodes comprising a rotated mirror symmetric version of said first set of sensor electrodes, said second set of sensor electrodes disposed parallel to said first axis;
a third set of sensor electrodes disposed on said first surface of said sensor substrate between sensor electrodes of said first set and said second set of sensor electrodes, wherein at least one sensor electrode of said third set of sensor electrodes comprises a rectangular shape with a long side aligned parallel to said first axis,wherein said first set and said third set of sensor electrodes are configured for providing a first capacitive coupling therebetween that varies substantially along said first axis, wherein said second set and said third set of sensor electrodes are configured for providing a second capacitive coupling therebetween that varies substantially inversely to said first capacitive coupling along said first axis, and wherein said first set, second set and third set of sensor electrodes are all disposed in a single layer; and
a processing system coupled to said first set of sensor electrodes, said second set of sensor electrodes, and said third set of sensor electrodes, wherein said processing system is configured for;
acquiring a first capacitive measurement by emitting a first electrical signal with at least one sensor electrode of said first set of sensor electrodes and receiving said first electrical signal with at least one sensor electrode of said third set of sensor electrodes;
acquiring a second capacitive measurement by emitting a second electrical signal with said second set of sensor electrodes and receiving said second electrical signal with said at least one sensor electrode of said third set of sensor electrodes; and
determining positional information related to an external input object based on said first capacitive measurement and said second capacitive measurement, wherein said positional information comprises at least a position of said input object along said first axis.
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Accused Products
Abstract
First, second, and third sets of sensor electrodes are disposed in a single layer on a first surface of a substrate of a transcapacitive sensor device. Sensor electrodes of the first set are substantially parallel to a first axis and are substantially identical to one another. The second set comprises a rotated mirror symmetric version of the first set, disposed parallel to the first axis. The third set is disposed between sensor electrodes of said first set and said second set, and includes a sensor electrode comprising a rectangular shape with a long side aligned paralleling the first axis. The first and third sets of sensor electrodes are configured for providing a first capacitive coupling therebetween that varies substantially along the first axis. The second and third sets are configured for providing a second capacitive coupling therebetween that varies substantially inversely to the first capacitive coupling along the first axis.
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Citations
16 Claims
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1. A transcapacitive sensor device comprising:
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a sensor substrate; a first set of sensor electrodes disposed on a first surface of said sensor substrate, wherein individual sensor electrodes of said first set of sensor electrodes are substantially parallel to a first axis, and wherein said individual sensor electrodes of said first set of sensor electrodes are substantially identical to one another; a second set of sensor electrodes disposed on said first surface of said sensor substrate, said second set of sensor electrodes comprising a rotated mirror symmetric version of said first set of sensor electrodes, said second set of sensor electrodes disposed parallel to said first axis; a third set of sensor electrodes disposed on said first surface of said sensor substrate between sensor electrodes of said first set and said second set of sensor electrodes, wherein at least one sensor electrode of said third set of sensor electrodes comprises a rectangular shape with a long side aligned parallel to said first axis, wherein said first set and said third set of sensor electrodes are configured for providing a first capacitive coupling therebetween that varies substantially along said first axis, wherein said second set and said third set of sensor electrodes are configured for providing a second capacitive coupling therebetween that varies substantially inversely to said first capacitive coupling along said first axis, and wherein said first set, second set and third set of sensor electrodes are all disposed in a single layer; and a processing system coupled to said first set of sensor electrodes, said second set of sensor electrodes, and said third set of sensor electrodes, wherein said processing system is configured for; acquiring a first capacitive measurement by emitting a first electrical signal with at least one sensor electrode of said first set of sensor electrodes and receiving said first electrical signal with at least one sensor electrode of said third set of sensor electrodes; acquiring a second capacitive measurement by emitting a second electrical signal with said second set of sensor electrodes and receiving said second electrical signal with said at least one sensor electrode of said third set of sensor electrodes; and determining positional information related to an external input object based on said first capacitive measurement and said second capacitive measurement, wherein said positional information comprises at least a position of said input object along said first axis. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of capacitive sensing in a transcapacitive sensor device, wherein said transcapacitive sensor device comprises a first set of transmitter sensor electrodes, a second set of transmitter sensor electrodes, and a set of receiver sensor electrodes, said method comprising:
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acquiring a first transcapacitive measurement by emitting a first electrical signal with said first set of transmitter sensor electrodes and receiving said first electrical signal with at least one receiver sensor electrode of said set of receiver sensor electrodes, wherein said first set of transmitter sensor electrodes and said set of receiver sensor electrodes are configured for providing a first capacitive coupling therebetween that varies substantially along a first axis; acquiring a second transcapacitive measurement by emitting a second electrical signal with said second set of transmitter sensor electrodes and receiving said second electrical signal with said at least one receiver sensor electrode of said set of receiver sensor electrodes, wherein said second set of transmitter sensor electrodes and said set of receiver sensor electrodes are configured for providing a second capacitive coupling therebetween that varies substantially inversely to said first capacitive coupling along said first axis, and wherein said first set of transmitter sensor electrodes, said second set of transmitter sensor electrodes, and said set of receiver sensor electrodes are all disposed in a single layer on a first surface of a sensor substrate; and determining positional information related to an external input object based on said first transcapacitive measurement and said second transcapacitive measurement, wherein said positional information comprises at least a position of said input object along said first axis. - View Dependent Claims (9, 10)
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11. A transcapacitive sensor device comprising:
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a sensor substrate; a first set of sensor electrodes disposed on a first surface of said sensor substrate, wherein individual sensor electrodes of said first set of sensor electrodes are substantially parallel to a first axis, and wherein said individual sensor electrodes of said first set of sensor electrodes are substantially identical to one another; a second set of sensor electrodes disposed on said first surface of said sensor substrate, said second set of sensor electrodes comprising a rotated mirror symmetric version of said first set of sensor electrodes, said second set of sensor electrodes disposed parallel to said first axis; a third set of sensor electrodes disposed on said first surface of said sensor substrate between sensor electrodes of said first set and said second set of sensor electrodes, wherein at least one sensor electrode of said third set of sensor electrodes comprises a rectangular shape with a long side aligned parallel to said first axis, wherein said first set and said third set of sensor electrodes are configured for providing a first capacitive coupling therebetween that varies substantially along said first axis, wherein said second set and said third set of sensor electrodes are configured for providing a second capacitive coupling therebetween that varies substantially inversely to said first capacitive coupling along said first axis, and wherein said first set, second set and third set of sensor electrodes are all disposed in a single layer; and a processing system coupled to said first set of sensor electrodes, said second set of sensor electrodes, and said third set of sensor electrodes, wherein said processing system is configured for; acquiring a first capacitive measurement by emitting a first electrical signal with at least one sensor electrode of said third set of sensor electrodes and receiving said first electrical signal with at least one sensor electrode of said first set of sensor electrodes; acquiring a second capacitive measurement by emitting a second electrical signal with said at least one sensor electrode of said third set of sensor electrodes and receiving said second electrical signal with at least one sensor electrode of said second set of sensor electrodes; and determining positional information related to an external input object based on said first capacitive measurement and said second capacitive measurement, wherein said positional information comprises at least a position of said input object along said first axis. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification