Title:
RETARDATION FILM, POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/074102
Kind Code:
A1
Abstract:
This retardation film (RF) is a cellulose ester retardation film having an in-plane retardation Ro of 20 nm or more, and contains, as additives, an ultraviolet absorbent and an alignment inhibitor for making the distribution of the ultraviolet absorbent in the film uniform in the film thickness direction. This retardation film (RF) satisfies a specific conditional expression with respect to ratios S1 to S3 of the ultraviolet absorbent contents in a region R1 that is a portion of the film from one surface to the thickness of 5 μm, in a region R2 that is a portion of the film from the other surface to the thickness of 5 μm and in a region R3 that is a central portion of the film in the thickness direction having a thickness of 5 μm.
Inventors:
SAITO KOICHI (JP)
NANJIYOU TAKASHI (JP)
NANJIYOU TAKASHI (JP)
Application Number:
PCT/JP2017/032678
Publication Date:
April 26, 2018
Filing Date:
September 11, 2017
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B5/30; G02F1/1335; G02F1/13363
Domestic Patent References:
| WO2015076101A1 | 2015-05-28 | |||
| WO2015060167A1 | 2015-04-30 | |||
| WO2015111435A1 | 2015-07-30 |
Foreign References:
| JP2002120244A | 2002-04-23 | |||
| JP2005224754A | 2005-08-25 | |||
| JP2008050550A | 2008-03-06 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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