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Printing of liquid crystal droplet laser resonators on a wet polymer solution and product made therewith

  • US 9,720,173 B2
  • Filed: 09/15/2016
  • Issued: 08/01/2017
  • Est. Priority Date: 05/25/2012
  • Status: Active Grant
First Claim
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1. A method of manufacturing a security feature for identifying objects or documents of value, the method comprising:

  • encoding information in a pattern; and

    ink jet printing a chiral nematic liquid crystal material from a reservoir using a print head on to a substrate in the pattern to form a patterned array of chiral nematic liquid crystal material deposits, wherein the print head, or the reservoir, or both, is heated to a temperature above the clearing point of the chiral nematic liquid crystal material, and wherein the chiral axes of the chiral nematic liquid crystal material deposits are aligned substantially perpendicular to the substrate such that a predetermined portion of the electromagnetic spectrum is selectively reflected over other regions of the electromagnetic spectrum by the chiral nematic liquid crystal material deposits.

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