Touch sensor detector system and method
First Claim
1. A method, comprising:
- generating multiple currents along multiple current paths in response to sensing a touch; and
collecting the multiple currents in a common electrical sink.
1 Assignment
0 Petitions
Accused Products
Abstract
A touch sensor detector system and method incorporating an interpolated sensor array is disclosed. The system and method utilize a touch sensor array (TSA) configured to detect proximity/contact/pressure (PCP) via a variable impedance array (VIA) electrically coupling interlinked impedance columns (IIC) coupled to an array column driver (ACD), and interlinked impedance rows (IIR) coupled to an array row sensor (ARS). The ACD is configured to select the IIC based on a column switching register (CSR) and electrically drive the IIC using a column driving source (CDS). The VIA conveys current from the driven IIC to the IIC sensed by the ARS. The ARS selects the IIR within the TSA and electrically senses the IIR state based on a row switching register (RSR). Interpolation of ARS sensed current/voltage allows accurate detection of TSA PCP and/or spatial location.
133 Citations
19 Claims
-
1. A method, comprising:
- generating multiple currents along multiple current paths in response to sensing a touch; and
collecting the multiple currents in a common electrical sink. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- generating multiple currents along multiple current paths in response to sensing a touch; and
-
8. A touch sensor, comprising:
-
an array of drive electrodes including a first electrode coupled to a drive circuitry and a second electrode coupled to the first electrode by way of a voltage divider; an array of sense electrodes including a third electrode connected to a current sink by way of a first path and a fourth electrode connected to the current sink by way of a different second path; a first sense element connected to the first and third electrodes; and a second sense element connected to the second and the fourth electrodes;
wherein,the first and the second electrodes are configured to power on simultaneously; and the third and the fourth electrodes are configured to simultaneously output currents to the current sink in response to the first and the second elements sensing a touch. - View Dependent Claims (9, 10, 11, 12, 13)
-
-
14. A touch sensor, comprising:
-
a sensing area including a plurality of drive electrodes including a first electrode connected to a drive circuitry and a second electrode connected to the first electrode by way of a first voltage divider, and including a plurality of sense electrodes connected to a first current sink; the plurality of drive electrodes including a third electrode connected to the drive circuitry and a fourth electrode connected to the third electrode by way of a second voltage divider, and including a plurality of sense electrodes connected to a second current sink; a first plurality of sense elements connected to the first and the second electrodes, wherein the first plurality of sense elements are configured to simultaneously generate multiple currents along multiple paths connected to the first electrical sink in response to sensing a touch; and a second plurality of sense elements connected to the third and the fourth electrodes, wherein the second plurality of sense elements are configured to simultaneously generate multiple currents along multiple paths connected to the second electrical sink in response to sensing a touch. - View Dependent Claims (15, 16, 17, 18, 19)
-
Specification