The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Aug. 01, 2024
Applicant:
Reald Spark, Llc, Boulder, CO (US);
Inventors:
Michael G Robinson, Boulder, CO (US);
Graham J. Woodgate, Henley-on-Thames, GB;
Jonathan Harrold, Leamington Spa, GB;
Ben Ihas, Boulder, CO (US);
Assignee:
REALD SPARK, LLC, Boulder, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/13 (2006.01); G02F 1/1335 (2006.01); G02F 1/13363 (2006.01); G02F 1/1337 (2006.01); G02F 1/1343 (2006.01);
U.S. Cl.
CPC ...
G02F 1/1323 (2013.01); G02F 1/133531 (2021.01); G02F 1/133536 (2013.01); G02F 1/133638 (2021.01); G02F 1/133738 (2021.01); G02F 1/133742 (2021.01); G02F 1/133746 (2021.01); G02F 1/134363 (2013.01);
Abstract
A switchable privacy display device comprises a spatial light modulator comprising an in-plane display polariser, an out-of-plane polariser and a polarisation switch arranged between the in-plane display polariser and the out-of-plane polariser. The display achieves high image visibility to an off-axis user in a wide-angle mode and high image security to an off-axis snooper in privacy mode of operation.