Optical film and method of producing the same, optical element, and image display device
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United States of America Patent
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Dec 28, 2004
Grant Date -
Jul 3, 2003
app pub date -
Nov 1, 2002
filing date -
Nov 2, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical film containing polyaryletherketone and a method of producing the optical film, the optical film being excellent in the heat resistance and uniformity, and the film having a negative birefringence. The optical film compensates birefringence of a liquid crystal display, thereby providing an optical element or an image display device that has desired color tones and viewing-angle characteristics. The optical film having a negative birefringence of 0.001 to 0.6 is produced by coating a solution containing polyaryletherketone on a substrate and subsequently drying the coating.
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