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Capacitive stereoscopic image sensing

  • US 9,898,148 B2
  • Filed: 05/27/2015
  • Issued: 02/20/2018
  • Est. Priority Date: 05/27/2015
  • Status: Active Grant
First Claim
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1. An input device, comprising:

  • a plurality of near-field receiver electrodes;

    a plurality of far-field receiver electrodes;

    a plurality of transmitter electrodes, wherein the near-field receiver electrodes, the far-field receiver electrodes, and the transmitter electrodes are disposed on one or more substrates and configured to sense input objects in a sensing region; and

    a processing system configured to;

    drive a sensing signal onto the transmitter electrodes;

    generate a near-field capacitive image of the sensing region based on resulting signals received from the near-field receiver electrodes,generate a far-field capacitive image of the sensing region based on resulting signals received from the far-field receiver electrodes,in response to detecting moisture in the sensing region, stop compensating for noise when processing the resulting signals received from the far-field receiver electrodes and increase a noise compensation level used when processing the resulting signals received from the near-field receiver electrodes, anddetermine a state of an input object interacting with the sensing region by comparing the near-field capacitive image describing the input object with the far-field capacitive image describing the input object.

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