OPTICAL FILM, OPTICAL MULTILAYER BODY AND LIQUID CRYSTAL DISPLAY DEVICE

Title:

OPTICAL FILM, OPTICAL MULTILAYER BODY AND LIQUID CRYSTAL DISPLAY DEVICE

Document Type and Number:

WIPO Patent Application WO/2020/012889

Kind Code:

A1

Abstract:

An optical film which is a stretched film formed from a thermoplastic norbornene resin, and which is configured such that: the thermoplastic norbornene resin has a stress birefringence CR of more than 2,900 × 10-12 Pa-1 and a glass transition temperature Tg of 125°C or higher; and the ratio of the retardation Rth in the thickness direction to the thickness d of the optical film, namely Rth/d is 3.5 × 10- 3 or more. The present invention also provides: an optical multilayer body which is provided with this optical film; and a liquid crystal display device which is provided with this optical multilayer body.

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Inventors:

NISHIOKA HIROYA (JP)
FUJII KENSAKU (JP)

Application Number:

PCT/JP2019/024151

Publication Date:

January 16, 2020

Filing Date:

June 18, 2019

Export Citation:

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Assignee:

ZEON CORP (JP)

International Classes:

G02B5/30; B32B7/023; B32B27/28; C08J5/18; G02F1/1335; G02F1/13363; G09F9/30

Foreign References:

JP2003238705A	2003-08-27
JP2008046147A	2008-02-28
JP2009139685A	2009-06-25
JP2000235185A	2000-08-29
US6646701B2	2003-11-11

Attorney, Agent or Firm:

SAKAI INTERNATIONAL PATENT OFFICE (JP)

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