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Display sheet having memory using limited coalescence domains

  • US 6,556,262 B1
  • Filed: 01/06/2000
  • Issued: 04/29/2003
  • Est. Priority Date: 01/06/2000
  • Status: Expired due to Term
First Claim
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1. A light-modulating, electrically responsive sheet comprising:

  • (a) a substrate;

    (b) an electrically conductive layer formed over the substrate;

    (c) a light-modulating layer disposed over the electrically conductive layer and including at least one dispersible cholesteric liquid crystal light-modulating material and coalescence limiting colloidal material into which the dispersible light-modulating material(s) is provided so that such dispersible cholesteric liquid crystal light-modulating material coalesces to form a set of domains having sizes within a range of from 6 to 12 microns that exhibit different electrically responsive optical states.

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