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Phase difference plate comprising polymer film containing compound having rod-shaped molecular structure

  • US 7,943,210 B2
  • Filed: 02/13/2009
  • Issued: 05/17/2011
  • Est. Priority Date: 03/14/2001
  • Status: Expired due to Fees
First Claim
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1. A phase difference plate comprising a cellulose ester film which comprises a compound represented by the following formula (I):


  • Ar1-L1-Ar2



    (I)in which each of Ar1 and Ar2 is independently phenyl or phenyl substituted with an alkyl group selected from the group consisting of methyl, ethyl, propyl, butyl, pentyl, heptyl and octyl; and

    L1 is —

    O—

    CO-alkylene-CO—

    O—

    or —

    CO—

    O-alkylene-O—

    CO—

    , said alkylene having a chain structure and having 1 to 6 carbon atoms.

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