Title:
CIRCULARLY POLARIZING PLATE, AND ORGANIC ELECTROLUMINESCENT DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/123725
Kind Code:
A1
Abstract:
The present invention provides: a circularly polarizing plate that when applied to a display device further suppresses reflection of ambient light and change in color during viewing from an oblique direction; and an organic electroluminescent display device. This circularly polarizing plate has a polarizer, a λ/2 plate, and a λ/4 plate in this order, and an angle formed between the absorption axis of the polarizer and an in-plane slow axis of the λ/4 plate is within a range of 20 to 70°. The Nz factor of the λ/4 plate is 0.30 to 0.70, and the absorption axis of the polarizer and the in-plane slow axis of the λ/2 plate are orthogonal or parallel. When the absorption axis of the polarizer and the in-plane slow axis of the λ/2 plate are orthogonal, the Nz factor of the λ/2 plate is 0.10 to 0.40, and when the absorption axis of the polarizer and the in-plane slow axis of the λ/2 plate are parallel, the Nz factor of the λ/2 plate is 0.60 to 0.90.
Inventors:
ATSUMI KUNIHIRO (JP)
SAITOH YUKITO (JP)
SAITOH YUKITO (JP)
Application Number:
PCT/JP2017/045509
Publication Date:
July 05, 2018
Filing Date:
December 19, 2017
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H05B33/02; G02B5/30; H01L27/32; H01L51/50
Domestic Patent References:
| WO2015166991A1 | 2015-11-05 | |||
| WO2017154817A1 | 2017-09-14 |
Foreign References:
| JP2003075635A | 2003-03-12 | |||
| JP2003029038A | 2003-01-29 | |||
| US20160266296A1 | 2016-09-15 |
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (JP)
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