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Systems and methods for voltage gradient sensor devices

  • US 9,052,782 B2
  • Filed: 07/29/2011
  • Issued: 06/09/2015
  • Est. Priority Date: 07/29/2011
  • Status: Expired due to Fees
First Claim
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1. A processing system for an input device, the processing system comprising:

  • a transmitter module including transmitter circuitry, the transmitter module configured to drive a first end of a transmitter electrode such that the transmitter electrode exhibits a first voltage gradient extending from the first end of the transmitter electrode toward a second end of the transmitter electrode;

    a receiver module including receiver circuitry, the receiver module configured to receive a first resulting signal with a first receiver electrode and a second resulting signal with a second receiver electrode, wherein the first receiver electrode and the second receiver electrode are proximate to corresponding discrete regions of the transmitter electrode; and

    a determination module configured to compute a first measurement of a change in capacitive coupling between the transmitter electrode and the first receiver electrode based on the first resulting signal, compute a second measurement of a change in capacitive coupling between the transmitter electrode and the second receiver electrode based on the second resulting signal, and determine a button response for an input object based on at least one of the first measurement and the second measurement.

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