Retardation film and utilization thereof
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United States of America Patent
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May 26, 2020
Grant Date -
Mar 22, 2018
app pub date -
Apr 15, 2016
filing date -
Apr 17, 2015
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Abstract
The retardation film according to the present invention is characterized by: including a polymer material that includes at least one cellulose derivative which includes specific monomer units: having an in-plane retardation Re(550) of 105-160 nm, reverse wavelength dispersion property, Re(450)/Re(550), of 0.80-0.89, and a thickness of 20-50 μm; and containing inorganic particles. In particular, the present invention exhibits the effect of reducing the photoelastic coefficient.
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