Touch sensor having jumpers
First Claim
1. A touch sensor, comprising:
- a plurality of electrodes forming a transmit electrode array and a receive electrode array;
drive circuitry configured to drive the transmit electrode array;
receive circuitry coupled to at least the receive electrode array;
one or more jumpers electrically coupling respective pairs of the electrodes, the one or more jumpers having an electrical resistance that varies with applied force; and
a controller configured to determine, based on output from the receive circuitry, a location of a touch input and an applied force of the touch input based on a capacitance associated with the output and on a resistance associated with the output,where an impedance of a capacitive path induced by driving the transmit electrode array is substantially equal to an impedance of a resistive path of the one or more jumpers.
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Accused Products
Abstract
Examples are disclosed herein that relate to sensing touch input and applied force at a common sensor using a common controller. One example provides a touch sensor with (1) a plurality of electrodes forming a transmit electrode array and a receive electrode array; (2) drive circuitry configured to drive the transmit electrode array; (3) receive circuitry coupled to at least the receive electrode array; (4) and one or more jumpers electrically coupling respective pairs of the electrodes, the one or more jumpers having an electrical resistance that varies with applied force. The touch sensor may include a controller configured to determine, based on output from the receive circuitry, a location of a touch input and an applied force of the touch input based on a capacitance associated with the output and on a resistance associated with the output.
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Citations
19 Claims
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1. A touch sensor, comprising:
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a plurality of electrodes forming a transmit electrode array and a receive electrode array; drive circuitry configured to drive the transmit electrode array; receive circuitry coupled to at least the receive electrode array; one or more jumpers electrically coupling respective pairs of the electrodes, the one or more jumpers having an electrical resistance that varies with applied force; and a controller configured to determine, based on output from the receive circuitry, a location of a touch input and an applied force of the touch input based on a capacitance associated with the output and on a resistance associated with the output, where an impedance of a capacitive path induced by driving the transmit electrode array is substantially equal to an impedance of a resistive path of the one or more jumpers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of input sensing, comprising:
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driving a transmit electrode array; receiving output from a receive electrode array, the transmit and receive electrode arrays formed by a plurality of electrodes; and determining from the output a location of a touch input based on a capacitance associated with the output, and an applied force of the touch input based on a resistance associated with the output, where one or more jumpers electrically couple respective pairs of electrodes, the one or more jumpers having an electrical resistance that varies with the applied force, and where an impedance of a capacitive path induced by driving the transmit electrode array is substantially equal to an impedance of a resistive path of the one or more jumpers. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A touch sensor, comprising:
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a plurality of electrodes forming a transmit electrode array and a receive electrode array; drive circuitry coupled to at least some of the electrodes; receive circuitry coupled to at least some of the electrodes; the drive circuitry being configured to drive one or more electrodes of the transmit electrode array to induce, via capacitive coupling to the receive electrode array, an output on one or more electrodes of the receive electrode array that is processed by the receive circuitry to determine a location of a touch input; and one or more jumpers electrically coupling jumpered pairs of the plurality of electrodes, the one or more jumpers having a resistance that varies with applied force, where for a given jumpered pair of the electrodes, the drive circuitry is configured to drive one electrode of the jumpered pair to induce an output on the other electrode of the jumpered pair, such output being processed at the receive circuitry to determine an applied force of the touch input, and where an impedance of a capacitive path induced by driving the transmit electrode array is substantially equal to an impedance of a resistive path of the one or more jumpers. - View Dependent Claims (18, 19)
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Specification