Title:
OPTICAL FILM, CIRCULARLY POLARIZING PLATE AND ORGANIC ELECTROLUMINESCENT DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/175136
Kind Code:
A1
Abstract:
The objective of the present invention is to provide: an optical film which is substantially capable of providing λ/4 retardation, while being suppressed in changes in the optical performance due to humidity changes, and which also has a function as a polarizing plate protective film; a circularly polarizing plate which is provided with this optical film; and an organic electroluminescent display device which is provided with this circularly polarizing plate as an anti-reflection member.
An optical film of the present invention is characterized by containing a cellulose derivative and having an in-plane retardation (Ro550) of the film as measured at a light wavelength of 550 nm in an environment at 23°C and at a relative humidity of 55% within a specific range and a ratio of the in-plane retardation (Ro450) to the in-plane retardation (Ro550) of the film as measured respectively at light wavelengths of 450 nm and 550 nm within a specific range. This optical film is also characterized in that: a substituent of the glucose skeleton of the cellulose derivative satisfies a specific condition; and a compound (A) which has a specific orientation is contained in this optical film.
Inventors:
FUJISAWA RIE (JP)
KIUCHI HIROYOSHI (JP)
FUKUSAKA KIYOSHI (JP)
SUZUKI TAKATUGU (JP)
KITA HIROSHI (JP)
KIUCHI HIROYOSHI (JP)
FUKUSAKA KIYOSHI (JP)
SUZUKI TAKATUGU (JP)
KITA HIROSHI (JP)
Application Number:
PCT/JP2014/060808
Publication Date:
October 30, 2014
Filing Date:
April 16, 2014
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B5/30; C07C233/80; C07D213/69; C07D231/12; C07D249/08; C07D271/06; C08B3/16; C08B13/00; C08K5/20; C08K5/3432; C08K5/3445; C08K5/3472; C08K5/353; C08L1/08; H01L51/50; H05B33/02
Domestic Patent References:
| WO2014050578A1 | 2014-04-03 |
Foreign References:
| JP2013024903A | 2013-02-04 | |||
| JP2006091807A | 2006-04-06 | |||
| JP2005154342A | 2005-06-16 | |||
| JPH05140045A | 1993-06-08 | |||
| JPH07207169A | 1995-08-08 |
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Mitsuaki international patent firm (JP)
Patent business corporation Mitsuaki international patent firm (JP)
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