Title:
PARTIAL REFLECTOR FOR CORRECTING COLOR SHIFT
Document Type and Number:
WIPO Patent Application WO/2019/069214
Kind Code:
A3
Abstract:
A partial reflector including a plurality of optical repeat units where each optical repeat unit includes first and second polymer layers is described. A refractive index difference between the first and second polymer layers along a first axis may be Any, a refractive index difference between the first and second polymer layers along an orthogonal second axis may be Δηχ, where |Δηχ| is at least 0.1 and |Δny| is no more than 0.04. The optical repeat units may have a smallest optical thickness Tl proximate a first side of the optical stack and a largest optical thickness T2 proximate an opposite second side of the optical stack, where (T2-T1)/(T2+T1) is in a range of 0.05 to 0.2, and T2 is at least 350 nm and no more 1250 nm. The partial reflector may be used in a circular polarizer for correcting color shift with view angle in a display.
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Inventors:
HAAG ADAM D (US)
PARK SUN YONG (KR)
NEVITT TIMOTHY J (US)
NIESON BRIANNA N (US)
HUSTON JODY L (US)
PARK SUN YONG (KR)
NEVITT TIMOTHY J (US)
NIESON BRIANNA N (US)
HUSTON JODY L (US)
Application Number:
PCT/IB2018/057624
Publication Date:
May 16, 2019
Filing Date:
October 02, 2018
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
International Classes:
G02B5/30; G02B1/08
Foreign References:
| US20160077266A1 | 2016-03-17 | |||
| US20100002296A1 | 2010-01-07 | |||
| KR101633133B1 | 2016-06-23 | |||
| JP3996940B2 | 2007-10-24 | |||
| JP5271575B2 | 2013-08-21 |
Attorney, Agent or Firm:
IDEN, Daniel J. et al. (US)
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