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Pressure-sensitive touch panel

  • US 10,739,926 B2
  • Filed: 08/07/2019
  • Issued: 08/11/2020
  • Est. Priority Date: 12/23/2015
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a touchscreen panel comprising;

    a plurality of first sensing electrodes disposed on a first face of a layer structure, the layer structure comprising at least a layer of piezoelectric material;

    a plurality of second sensing electrodes disposed on a second face of the layer structure, the second face opposed to the first face;

    a plurality of separated common electrodes disposed on the second face of the layer structure and interleaved with the second sensing electrodes; and

    a device connected to the touchscreen panel and further configured for connection to a capacitive touch controller wherein the capacitive touch controller is configured to measure mutual capacitance between the first sensing electrodes and the second sensing electrodes;

    the device comprising;

    a plurality of input/output terminals for the capacitive touch controller;

    a plurality of separation stages, each separation stage connecting a corresponding input/output terminal to at least one first sensing electrode or at least one second sensing electrode, wherein each separation stage is configured to pass signals to and/or from the capacitive touch controller;

    at least one amplification stage, each amplification stage having at least one input and an output configured to provide an amplified signal, wherein the number of amplification stages is less than or equal to the number of separation stages and each amplification stage input is connected to one or more of the first input/output terminals through at least one respective separation stage;

    wherein each amplification stage or each separation stage is configured to attenuate signals from the capacitive touch controller;

    wherein the apparatus is configured to measure, based on the amplified signals, pressure values between the first sensing electrodes and the separated common electrodes.

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