Randomizing polarization of displays for fundamental improvement of color mura caused by birefringence

Most existing displays utilize polarization technologies to produce images and improve image quality. However, polarized light from displays causes color mura because of the birefringence of the polymer films used. Thus, eliminating color degradation remains a challenge despite the incorporation of...

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Bibliographic Details
Published in:Optics letters 2024-11, Vol.49 (22), p.6501
Main Authors: Sasaki, Shizuki, Koike, Yasuhiro
Format: Article
Language:English
Subjects:
Birefringence
Chromaticity
Color fading
Depolarization
Displays
Image quality
Light sources
Photodegradation
Polarization
Polarized light
Polymer films
Polymers
Position measurement
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Description
Summary:Most existing displays utilize polarization technologies to produce images and improve image quality. However, polarized light from displays causes color mura because of the birefringence of the polymer films used. Thus, eliminating color degradation remains a challenge despite the incorporation of complex polarization technologies such as retardation films. Our proposed random depolarization film (RDF) addresses this issue by randomizing the polarization of light from displays. Chromaticity measurements demonstrate that the RDF effectively compensates for color mura due to low-cost polymer films. Notably, the RDF compensation mechanism is independent of the RDF position and light source spectrum. Therefore, the RDF could be an innovative solution for color degradation in existing displays.
ISSN:0146-9592
1539-4794
1539-4794
DOI:10.1364/OL.544097