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Methods for controlling electro-optic displays

  • US 7,545,358 B2
  • Filed: 03/01/2006
  • Issued: 06/09/2009
  • Est. Priority Date: 08/19/2003
  • Status: Active Grant
First Claim
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1. An electro-optic display comprising:

  • a layer of a bistable electro-optic medium;

    a plurality of pixel electrodes disposed on one side of the layer of electro-optic medium, at least one of the pixel electrodes being a sensor pixel electrode;

    at least one non-linear element associated with each pixel electrode;

    pixel drive means arranged to apply voltages to the pixel electrodes via the non-linear elements, the pixel drive means being arranged to apply a predetermined voltage to the input of the non-linear element associated with the at least one sensor pixel electrode;

    a common electrode on the opposed side of the layer of electro-optic medium from the pixel electrodes; and

    measuring means arranged to receive the predetermined voltage and the voltage on the at least one sensor pixel electrode and to determine the difference therebetween.

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