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Electrophoretic display and novel process for its manufacture

  • US 6,867,898 B2
  • Filed: 05/23/2003
  • Issued: 03/15/2005
  • Est. Priority Date: 03/03/2000
  • Status: Expired due to Term
First Claim
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1. A process for the preparation of an electrophoretic display, which process comprises the steps of:

  • a) filling the microcups with a dispersion of a thermoplastic precursor in an electrophoretic fluid which fluid comprises charged pigment particles dispersed in a dielectric solvent wherein said thermoplastic precursor has a specific gravity lower than that of the dielectric solvent and the charged pigment particles; and

    b) sealing the filled microcups by hardening a supernatant layer formed from said thermoplastic precursor at the top of the electrophoretic fluid.

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