Retardation film and liquid crystal display device using the same
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United States of America Patent
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Jan 11, 2011
Grant Date -
Jun 18, 2009
app pub date -
Feb 24, 2009
filing date -
Aug 25, 2006
priority date (Note) -
Expired
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Abstract
A retardation film, formed by stretching a film including a norbornene-based, ring-opening polymer containing a structural unit (A) represented by a formula (1), has high transparency, excellent wavelength dispersion characteristics in a single layer, is capable of providing specific retardation to broadband light, is extremely adhesive to other materials, is capable of attaining optical characteristics that are unique among negative birefringence characteristics, and is capable of providing a reverse dispersion of birefringence wavelength dispersion characteristics. The present invention also provides a liquid crystal display device using the foregoing film.
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