POLYMER FILM, METHOD FOR PRODUCING THE SAME, RETARDATION FILM USING THE SAME, POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a polymer film which is useful as an optical compensation film of a liquid crystal display device, and which is free from coloring.

SOLUTION: The polymer film contains at least one polymer as a main component and at least one compound satisfying relational formulae (1) and (2) in an amount of 0.2-20 mass% with respect to at least the one polymer, wherein in-plane retardation Re(λ) at a wavelength of λ nm and thickness-direction retardation Rth(λ) at a wavelength of λ nm respectively satisfy relational formulae (3)-(6): (1) 360 nm≤λmax≤400 nm; (2) λ1/2-λmax≤20 nm (in the relational formulae, λmax represents a maximum absorption wavelength (in nm) of the compound, and λ1/2represents a wavelength with absorption intensity equal to a half of that at λmax (where λmax<λ1/2)); (3): Re(450)-Re(550)≤0 nm; (4) Rth(450)-Rth(550)≥0 nm; (5): 60 nm≤Re(550)≤100 nm; and (6) 40 nm≤Rth(550)≤80 nm.

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