METHOD FOR MANUFACTURING RETARDATION FILM

WIPO Patent Application WO/2018/180492

A1

The present invention provides a method for manufacturing a retardation film capable of suppressing the axial displacement distribution of a liquid crystal compound. The method for manufacturing a retardation film comprises: a step of forming a first coating film by applying and drying an alignment-layer forming material on a continuous film support being conveyed; a step of forming an alignment layer by irradiating the first coating film with polarized ultraviolet light; a step of forming a second coating film by applying and drying a liquid-crystal layer forming material on the alignment layer; and a step of forming a liquid crystal layer by aligning and setting the liquid crystal compound in the second coating film. The continuous film support whereon the first coating film is formed is wound around a temperature controllable backup roll when forming the alignment layer to irradiate the continuous film support with polarized ultraviolet light. The light output from a rod-shaped light source is polarized with a wire grid polarizer to create the polarized ultraviolet light. The wire grid of the wire grid polarizer is arranged at an angle θ that is perpendicular to or not parallel to the longitudinal direction of the backup roll and a louver is positioned between the rod-shaped light source and the wire grid polarizer.

NAGANO SATOSHI (JP)
OI YUKI (JP)
HASEGAWA MASATAKA (JP)

PCT/JP2018/009934

October 04, 2018

March 14, 2018

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FUJIFILM CORP (JP)

G02B5/30

JP2013148635A	2013-08-01
JP2014170238A	2014-09-18
JP2014026133A	2014-02-06
JP2004144884A	2004-05-20

NAKASHIMA Junko et al. (JP)

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