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:
Jun. 23, 2020
Filed:
May. 22, 2017
Applicant:
Barco NV, Kortrijk, BE;
Inventor:
Dirk Maes, Bissegem, BE;
Assignee:
BARCO NV, Kortrijk, BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/602 (2014.01); G03B 21/604 (2014.01); G03B 35/20 (2006.01); H04N 9/31 (2006.01); G03B 21/60 (2014.01); G03B 21/10 (2006.01); G03B 21/58 (2014.01); G03B 21/62 (2014.01); G03B 21/56 (2006.01);
U.S. Cl.
CPC ...
G03B 21/602 (2013.01); G03B 21/10 (2013.01); G03B 21/56 (2013.01); G03B 21/58 (2013.01); G03B 21/60 (2013.01); G03B 21/604 (2013.01); G03B 21/62 (2013.01); G03B 35/20 (2013.01); H04N 9/3147 (2013.01);
Abstract
A projection screen with micro lenses or micro mirrors for the purpose of suppressing ambient light by means of a patterned layer stack including at least a polarizer and a quarter wave retarder. The projection screen has a surface structure where light from a projector is focussed at positions where the light can escape from the structure and is optionally diffused. The location of the focus positions depends upon the incident angle of the light coming from the projector, and therefore the screen is tailored for a certain projector configuration and projector light direction.