Title:
REFLECTIVE POLARIZER AND OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/056372
Kind Code:
A1
Abstract:
An optical system (200) includes an emissive display (220) and a reflective polarizer (100) disposed on the display (220). The display (220) includes a blue pixel (222b) emitting light having a peak at a wavelength λb. For substantially normally incident light: for the wavelength λb, the reflective polarizer (100) reflects at least 30% of the incident light having a first polarization state (b) and transmits at least 75% of the incident light having an orthogonal second polarization state(a); and for at least one wavelength λ1 greater than λb, λ1-λb ≤ 50 nm, the reflective polarizer (100) transmits at least 75% of the incident light for each of the first and second polarization states. For the wavelength λb, the reflective polarizer (100) has a maximum optical transmittance Tmax for light incident at a first incident angle, and an optical transmittance Tmax/2 for light incident at a second incident angle greater than the first incident angle by less than about 50 degrees.
Inventors:
XU FUGUO (CN)
HAAG ADAM (US)
DENKER MARTIN E (US)
NEVITT TIMOTHY (US)
HAAG ADAM (US)
DENKER MARTIN E (US)
NEVITT TIMOTHY (US)
Application Number:
PCT/CN2019/108348
Publication Date:
April 01, 2021
Filing Date:
September 27, 2019
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
XU FUGUO (CN)
XU FUGUO (CN)
International Classes:
G02B5/30; G02B27/28; G02F1/1335; G09F9/00
Domestic Patent References:
| WO2018163009A1 | 2018-09-13 |
Foreign References:
| CN104823299A | 2015-08-05 | |||
| CN103207426A | 2013-07-17 | |||
| CN101124510A | 2008-02-13 | |||
| CN1776505A | 2006-05-24 | |||
| CN101124510A | 2008-02-13 |
Attorney, Agent or Firm:
TEE&HOWE INTELLECTUAL PROPERTY ATTORNEYS (CN)
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