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:
Mar. 18, 2025
Filed:
May. 01, 2024
Applicant:
Reald Spark, Llc, Boulder, CO (US);
Inventors:
Jonathan Harrold, Leamington Spa, GB;
Michael G Robinson, Boulder, CO (US);
Graham J. Woodgate, Henley-on-Thames, GB;
Robert Ramsey, Boulder, CO (US);
Ben Ihas, Boulder, CO (US);
Assignee:
RealD Spark, LLC, Boulder, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/13 (2006.01); G02F 1/133 (2006.01); G02F 1/1335 (2006.01); G02F 1/1343 (2006.01);
U.S. Cl.
CPC ...
G02F 1/1323 (2013.01); G02F 1/13306 (2013.01); G02F 1/133528 (2013.01); G02F 1/13439 (2013.01);
Abstract
A switchable privacy display device comprises a spatial light modulator and a switchable diffractive view angle control retarder arrangement arranged between a display polariser of the spatial light modulator and an additional polariser. The display achieves high image visibility to an off-axis user in a share mode of operation and high image security to an off-axis snooper in privacy mode of operation.