×

Method for manufacturing a wide band polarization film

  • US 6,252,640 B1
  • Filed: 12/04/1998
  • Issued: 06/26/2001
  • Est. Priority Date: 01/10/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for manufacturing a polarization film having wide band characteristics, comprising:

  • (a) forming two or more photopolymerized, cholesteric liquid crystal films having selective light-reflecting central wavelengths different from one another comprising, (1) forming a coated liquid crystal layer by coating cholesteric liquid crystals having selective light-reflecting central wavelengths different from one another on respective substrates, (2) adding photopolymerization initiator to the coated liquid crystal layer, and (3) irradiating the coated liquid crystal layer; and

    (b) binding together the two or more liquid crystal films so that the selective light-reflecting central wavelengths of the films do not neighbor one another;

    wherein the cholesteric liquid crystals are produced by adding nematic liquid crystals to the cholesteric liquid crystals with a definite selective light-reflecting central wavelength at predetermined mixing ratios, and wherein the cholesteric liquid crystal are coated on the substrate after being dissolved in non-polar solvent.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×