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:
Sep. 27, 2022
Filed:
Jul. 19, 2021
Applicant:
Reald Spark, Llc, Beverly Hills, CA (US);
Inventors:
Graham J. Woodgate, Henley-on-Thames, GB;
Michael G. Robinson, Boulder, CO (US);
Jonathan Harrold, Upper Heyford, GB;
Robert A. Ramsey, Boulder, CO (US);
Ben Ihas, Boulder, CO (US);
Assignee:
RealD Spark, LLC, Beverly Hills, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/137 (2006.01); G02F 1/13363 (2006.01); G02F 1/1335 (2006.01); G02F 1/01 (2006.01); G02F 1/1337 (2006.01);
U.S. Cl.
CPC ...
G02F 1/137 (2013.01); G02F 1/0136 (2013.01); G02F 1/1337 (2013.01); G02F 1/13363 (2013.01); G02F 1/133536 (2013.01); G02F 2413/01 (2013.01);
Abstract
A switchable privacy display apparatus comprises a spatial light modulator, a light control film, and a polar control retarder that comprises plural retarders 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 public mode of operation and high image security to an off-axis snooper in privacy mode of operation.