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Concurrent input sensing and display updating

  • US 10,073,550 B2
  • Filed: 12/20/2012
  • Issued: 09/11/2018
  • Est. Priority Date: 09/20/2012
  • Status: Active Grant
First Claim
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1. A processing system for a display device integrated with a capacitive sensing device, the processing system comprising:

  • a driver module comprising driver circuitry, the driver module coupled to a sub-pixel with a first source line and a first common electrode, wherein the first common electrode is directly coupled to the sub-pixel, and wherein the driver module is configured to;

    update the sub-pixel by driving the first source line with a first voltage; and

    drive, while the first voltage is driven onto the sub-pixel, the first common electrode for capacitive sensing by modulating the first common electrode between a second voltage and a third voltage, wherein the first voltage driven on the first source line is selected based on voltage transitions used to modulate the first common electrode;

    a receiver module coupled to a plurality of receiver electrodes configured to receive resulting signals from the receiver electrodes while the first common electrode is modulated between the second voltage and the third voltage; and

    a determination module configured to determine positional information based on the resulting signals.

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