Indicia display for electro-optic devices wherein the indicia comprises a dielectric material extending at least partially into the electro-optic medium

  • US 5,189,537 A
  • Filed: 01/28/1991
  • Issued: 02/23/1993
  • Est. Priority Date: 01/28/1991
  • Status: Expired due to Fees
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First Claim
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1. An electro-optic device comprising:

  • a pair of optically transparent substrates positioned in spaced relation to one another, each substrate having an inner surface facing the inner surface of the other substrate, an opposing outer surface and a perimeter edge, said inner surfaces defining a space between said substrates;

    an electro-optic medium confined in said space and having a light transmittance which is variable by the application of an electric field;

    a seal extending between said substrates near their respective perimeter edges, circumscribing said space between said substrates, and confining said electro-optic medium in said space;

    electrical means for applying an electric field to said electro-optic medium; and

    a dielectric material forming indicia on at least one of said inner surfaces, said indicia extending from said one surface toward the other of said surfaces and extending at least partially into said electro-optic medium.

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