Phase difference film, phase difference film composite and liquid crystal display device using the same
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United States of America Patent
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Oct 28, 2003
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N/A
app pub date -
Mar 29, 2001
filing date -
Jul 29, 1999
priority date (Note) -
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Abstract
A retardation film that can compensate for the optical properties of the liquid crystal cells of a liquid crystal display device and thereby enhance image quality. The retardation film consists of a single polymer film, which has a wavelength range in which the retardation value is positive and a wavelength range in which it is negative in a wavelength range of 400-800 nm, and which satisfies the following inequality (1) and/or (2) and has a water absorption of no greater than 1% by mass. .vertline.R(400).vertline..gtoreq.10 nm (1) .vertline.R(700).vertline..gtoreq.10 nm (2)
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