logo

For the Inventor, By the Inventor

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.:

US 11109014 B1

PDFFull Text
Date of Patent:
Aug. 31, 2021

Filed:

Nov. 05, 2018

Privacy display apparatus

Applicant:

Reald Spark, Llc, Beverly Hills, CA (US);

Inventors:

Michael G. Robinson, Boulder, CO (US);

Graham J. Woodgate, Henley on Thames, GB;

Jonathan Harrold, Leamington Spa, GB;

Robert A Ramsey, Boulder, CO (US);

Ben Ihas, Boulder, CO (US);

Assignee:

RealD Spark, LLC, Beverly Hills, CA (US);

Attorney:

Penny L. Lowry

Primary Examiner:

James A Dudek

Int. Cl.
CPC ...
G02F 1/13363 (2006.01); H04N 13/30 (2018.01); F21V 8/00 (2006.01); G02F 1/295 (2006.01); G02F 1/365 (2006.01); G02F 1/1335 (2006.01); G02F 1/13 (2006.01); G02F 1/1337 (2006.01); G02F 1/137 (2006.01); G02F 1/13357 (2006.01); G02F 1/1347 (2006.01);
U.S. Cl.
CPC ...
H04N 13/30 (2018.05); G02B 6/0048 (2013.01); G02B 6/0068 (2013.01); G02F 1/13 (2013.01); G02F 1/137 (2013.01); G02F 1/1323 (2013.01); G02F 1/1337 (2013.01); G02F 1/1347 (2013.01); G02F 1/13363 (2013.01); G02F 1/133524 (2013.01); G02F 1/133528 (2013.01); G02F 1/133536 (2013.01); G02F 1/133615 (2013.01); G02F 1/133753 (2013.01); G02F 1/295 (2013.01); G02F 1/365 (2013.01); G02B 6/0011 (2013.01); G02F 1/13478 (2021.01); G02F 1/13706 (2021.01); G02F 1/13712 (2021.01); G02F 1/133562 (2021.01); G02F 1/133567 (2021.01); G02F 1/133638 (2021.01); G02F 1/133738 (2021.01); G02F 1/133742 (2021.01); G02F 2203/12 (2013.01); H04N 2013/403 (2018.05);
Abstract

A privacy display comprises a liquid crystal spatial light modulator, a switchable retarder and a passive compensation retarder arranged between a pair of polarisers. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without change of image contrast, whereas off-axis light has reduced contrast to reduce the visibility of the display to off-axis snoopers over a wide polar angular range. In a wide angle mode of operation, the retardance of the switchable retarder is adjusted so that off-axis contrast is substantially unmodified.

Find Patent Forward Citations

Loading…