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Active-matrix touchscreen

  • US 10,170,535 B2
  • Filed: 09/15/2017
  • Issued: 01/01/2019
  • Est. Priority Date: 09/25/2014
  • Status: Active Grant
First Claim
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1. An active-matrix touchscreen having a touch area in which the active-matrix touchscreen is responsive to touches, the touchscreen comprising:

  • a substrate;

    a system controller;

    a plurality of spatially separated independent touch elements disposed in a two-dimensional array within the touch area on and in contact with the substrate, each touch element comprising;

    a mutual-capacitive touch sensor comprising at least two electrical conductors in a common layer on and in contact with the substrate, the two electrical conductors forming a capacitor; and

    a touch controller circuit on and in contact with the substrate for providing one or more sensor-control signals to the touch sensor and for receiving a sense signal responsive to the one or more sensor-control signals from the touch sensor, wherein each touch sensor operates independently of any other touch sensor of the plurality of touch elements, wherein the two electrical conductors of each touch element are electrically separate from the two electrical conductors of any other touch element,wherein the touch controller circuit of one or more of the plurality of spatially separated independent touch elements is disposed between the respective touch sensors of two or more of the plurality of spatially separated independent touch elements over the substrate.

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