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Patent Searching and Data


Title:
PHASE DIFFERENCE FILM
Document Type and Number:
WIPO Patent Application WO/2019/004279
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a phase difference film capable of exhibiting a sufficient reverse wavelength dispersion property. The present invention relates to a phase difference film that comprises a copolymer containing at least one unit selected from a unit represented by general formula (1) and a unit represented by general formula (2), and a unit represented by general formula (3), and satisfies 20 nm < Re(548) < 300 nm, 0.5 < Re(446)/Re(548) < 1.0, and 1.0 < Re(629)/Re(548) < 2.0 where Re(446), Re(548), and Re(629) indicate in-plane retardations at wavelengths of 446 nm, 548 nm, and 629 nm, respectively.

Inventors:
UEHIRA SHIGEKI (JP)
MOROOKA NAOYUKI (JP)
NAKAYAMA TAKAFUMI (JP)
Application Number:
JP2018/024351
Publication Date:
January 03, 2019
Filing Date:
June 27, 2018
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/30; C08G64/02; C08G64/04; C08G64/16
Domestic Patent References:
WO2017146023A12017-08-31
WO2017146022A12017-08-31
Foreign References:
JP2009057322A2009-03-19
JP5079150B22012-11-21
JP5706071B22015-04-22
JP5668077B22015-02-12
JP4739636B22011-08-03
JP4010810B22007-11-21
JP3325560B22002-09-17
JP2015193809A2015-11-05
Attorney, Agent or Firm:
SIKS & CO. (JP)
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