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. 06, 2024
Filed:
Jun. 28, 2020
Applicant:
Appotronics Corporation Limited, Guangdong, CN;
Inventors:
Lin Wang, Guangdong, CN;
Xiaofeng Tang, Guangdong, CN;
Wei Sun, Guangdong, CN;
Yi Li, Guangdong, CN;
Assignee:
APPOTRONICS CORPORATION LIMITED, Guangdong, CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/60 (2014.01); G03B 21/56 (2006.01); G03B 21/58 (2014.01); G03B 21/62 (2014.01); G03B 21/625 (2014.01);
U.S. Cl.
CPC ...
G03B 21/60 (2013.01); G03B 21/56 (2013.01); G03B 21/58 (2013.01); G03B 21/62 (2013.01); G03B 21/625 (2013.01);
Abstract
Provided is a projection screen, the taper angles of a plurality of triangular pyramid units arranged in an array are designed to gradually change according to a predetermined relationship, so that the image light emitted from the projector is reflected by a microstructure layer with a triangular pyramid unit and then converges to a range centered on the human eye, which reduces the difference in brightness at different viewing positions, so as to ensure that the projection screen has high brightness uniformity and high gain.