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Method and machine for producing optical compensation sheet

  • US 20030214059A1
  • Filed: 05/09/2003
  • Published: 11/20/2003
  • Est. Priority Date: 05/13/2002
  • Status: Active Grant
First Claim
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1. A method for producing an optical compensation sheet from a continuous film, which is constructed of a transparent film base and a transparent polymer layer formed on said film base, comprising steps of:

  • (a) transporting said film;

    (b) blowing a first air onto said polymer layer of said film upon transporting said film, said first air having dry bulb temperature between 30°

    C. and 60°

    C. and relative humidity between 55% and 80%;

    (c) rubbing a surface of said polymer layer to form alignment on said polymer layer after step (b); and

    (d) coating said polymer layer with a solution containing liquid crystal after step (c), so as to obtain said optical compensation sheet.

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