Title:
CIRCULARLY POLARIZING PLATE, LONG BROADBAND λ/4 PLATE, ORGANIC ELECTROLUMINESCENCE DISPLAY DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/124456
Kind Code:
A1
Abstract:
This circularly polarizing plate comprises, in the following order: a polarizing film; a λ/2 plate having a slow axis in a direction forming an angle of θh with respect to a transmission axis of the polarizing film; and a λ/4 plate having a slow axis in a direction forming an angle of θq with respect to the transmission axis of the polarizing film, wherein: the angle θh of the λ/2 plate and the angle θq of the λ/4 plate satisfy the following equation (A1) and inequalities (A2) and (A3) (where, (A1): θq±10°=2θh+45°, (A2): 25°<θh<45°, and (A3): 95°<θq<135°); the degree of wavelength dispersion of the λ/2 plate is different from the degree of wavelength dispersion of the λ/4 plate; and the NZ coefficient NZq of the λ/4 plate satisfies NZq≤0.0.
Inventors:
OSATO KAZUHIRO (JP)
Application Number:
PCT/JP2018/046846
Publication Date:
June 27, 2019
Filing Date:
December 19, 2018
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
G02B5/30; G02F1/1335; G02F1/13363; G09F9/00; G09F9/30; H01L27/32; H01L51/50; H05B33/02
Domestic Patent References:
| WO2016047517A1 | 2016-03-31 | |||
| WO2008001582A1 | 2008-01-03 | |||
| WO2016043124A1 | 2016-03-24 | |||
| WO2017170360A1 | 2017-10-05 | |||
| WO2018159297A1 | 2018-09-07 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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