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:
Feb. 09, 2021
Filed:
Sep. 18, 2018
Applicant:
Delta Electronics, Inc., Taoyuan, TW;
Inventors:
Yu-Nien Lin, Taoyuan, TW;
Meng-Han Liu, Taoyuan, TW;
Assignee:
DELTA ELECTRONICS, INC., Taoyuan, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01); H04N 9/31 (2006.01);
U.S. Cl.
CPC ...
G02B 5/3083 (2013.01); H04N 9/3161 (2013.01);
Abstract
A projection device includes a laser source and a birefringent depolarizer. The birefringent depolarizer is a single wedge shape and is arranged in front of a projection lens. The laser source is configured to emit a laser beam to penetrate the birefringent depolarizer to be a projection beam having multiple polarization patterns different from polarization patterns of the laser beam. The projection beam is projected onto a projection screen through the projection lens. The polarization patterns are multiple different polarization directions.