Patterned phase difference film and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-9720154-B2
Application number	US-201615228288-A
Country	US
Kind code	B2
Filing date	Aug 4, 2016
Priority date	Oct 14, 2011
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A pattern phase difference film is manufactured by a process including a laminate body formation step of applying a pattern alignment layer composition on a substrate to form a laminate body, a heat-drying layer formation step of heat-drying the composition to form a heat-dried layer, a pattern alignment layer formation step of irradiating a polarization pattern onto the heat-dried layer to form a pattern alignment layer, and a phase difference layer formation step of forming a phase difference layer including a rod-shaped compound on the pattern alignment layer. During the steps between the heat-drying layer formation step and the phase difference layer formation step, the heat-dried layer and the pattern alignment layer are exposed to the air for four hours or less.

First claim

The invention claimed is:

1. A patterned phase difference film comprising:
a substrate;
a pattern alignment layer which is formed on the substrate and in which an alignment pattern is formed of a photo-alignment material exhibiting a photo-alignment property through irradiation of polarized light; and
a phase difference layer which is formed on the pattern alignment layer and contains a polymerizable liquid crystal composition comprising a rod-like compound having a polymerizable functional group in a molecule and exhibiting liquid crystal characteristics,
wherein black luminance at an extinction position of polarizing plates at a crossed-nicols state is in a range of from 4 cd/cm 2 to 10 cd/cm 2 .

2. An optical laminate comprising the patterned phase difference film according to claim 1 .

Assignees

• Dainippon Printing Co Ltd

Inventors

• Inomata Yuya
• Kambara kumiko
• Fukuda Masanori
• Usuki Hideki
• Kashima Keiji
• Yamada Kazuki

Classifications

• G03F7/0005

  Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor · CPC title

• G02B5/3016 Primary

  involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528) · CPC title

• G02B30/25

  using polarisation techniques · CPC title

• G02F1/133528

  Polarisers · CPC title

• G02F1/13363

  Birefringent elements, e.g. for optical compensation · CPC title