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Threshold addressing of electrophoretic displays

  • US 6,693,620 B1
  • Filed: 05/03/2000
  • Issued: 02/17/2004
  • Est. Priority Date: 05/03/1999
  • Status: Expired due to Term
First Claim
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1. A method of addressing an electrophoretic display, the method comprising the steps of:

  • (a) providing an electrophoretic display comprising a plurality of display elements, each of the display elements comprising;

    an encapsulating wall;

    a plurality of particles disposed within the encapsulating wall, at least one of the plurality of particles responsive to an applied electric field; and

    a carrier medium disposed within the encapsulating wall; and

    (b) providing a first voltage across at least one of said display elements, thereby to change a viscosity of the carrier medium; and

    (c) providing a second voltage across at least one of said display elements, thereby to cause at least one particle to move within the element, wherein the particles are substantially immobile under the second voltage without application of the first voltage.

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