Patterned phase difference film and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-9638848-B2
Application number	US-201214351346-A
Country	US
Kind code	B2
Filing date	Oct 1, 2012
Priority date	Oct 14, 2011
Publication date	May 2, 2017
Grant date	May 2, 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 method for manufacturing a patterned phase difference film comprising:
forming a laminate by coating a substrate with a pattern alignment layer composition for forming a pattern alignment layer containing a photo-alignment material exhibiting a photo-alignment property through irradiation of polarized light;
forming a heat-dried layer by heating and drying the pattern alignment layer composition after the forming of the laminate and then immediately winding the laminate in a roll shape without taking a pause in time;
within four hours of winding the laminate in a roll shape, extracting the laminate in a sheet shape and immediately forming a pattern alignment layer having a different photo-alignment property by irradiating the heat-dried layer with a polarized light pattern; and
forming a phase difference layer containing a rod-like compound having a polymerizable functional group in a molecule exhibiting liquid crystal characteristics on the pattern alignment layer after the forming of the pattern alignment layer.

2. The method for manufacturing a patterned phase difference film according to claim 1 , wherein the patterned phase difference film has a black luminance at an extinction position of polarizing plates at a crossed-nicols state of 6 cd/cm 2 or less.

3. The method for manufacturing a patterned phase difference film according to claim 2 , wherein the photo-alignment material has both a photodimerization portion and a thermal crosslinked portion.

4. The method for manufacturing a patterned phase difference film according to claim 3 , wherein the substrate is a substrate subjected to antiglare treatment.

5. The method for manufacturing a patterned phase difference film according to claim 2 , wherein the substrate is a substrate subjected to antiglare treatment.

6. The method for manufacturing a patterned phase difference film according to claim 1 , wherein the photo-alignment material has both a photodimerization portion and a thermal crosslinked portion.

7. The method for manufacturing a patterned phase difference film according to claim 6 , wherein the substrate is a substrate subjected to antiglare treatment.

8. The method for manufacturing a patterned phase difference film according to claim 1 , wherein the substrate is a substrate subjected to antiglare treatment.

Assignees

• Dainippon Printing Co Ltd

Inventors

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

Classifications

• G02F1/13363

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

• G03F7/0005

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

• G02B30/25

  using polarisation techniques · 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

• G02F1/133528

  Polarisers · CPC title