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Black image insertion for capacitive sensing

  • US 9,223,449 B2
  • Filed: 03/14/2013
  • Issued: 12/29/2015
  • Est. Priority Date: 03/14/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • transmitting a first display image for display on a first portion of a display screen of a display device;

    transmitting a black image for display on the first portion of the display screen after outputting the first display image, wherein the black image comprises a plurality of contiguous display lines of the display screen;

    identifying a transmitter electrode located substantially within the first portion of the display screen; and

    driving, using a processor, a signal used for capacitive sensing on the identified transmitter electrode to determine positional information only upon determining that the black image is displayed in the first portion of the display screen.

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