Invention Grant
- Patent Title: Projection screen and projection system using the same
- Patent Title (中): 投影屏幕和投影系统使用相同
-
Application No.: US14483978Application Date: 2014-09-11
-
Publication No.: US09280040B2Publication Date: 2016-03-08
- Inventor: Yu-Chang Wang
- Applicant: DELTA ELECTRONICS, INC.
- Applicant Address: TW
- Assignee: DELTA ELECTRONICS, INC.
- Current Assignee: DELTA ELECTRONICS, INC.
- Current Assignee Address: TW
- Agency: Hauptman Ham, LLP
- Priority: TW103121286A 20140620
- Main IPC: G03B21/625
- IPC: G03B21/625 ; G03B21/602
Abstract:
A projection screen includes a reflector and a plurality of compound lenses. The compound lenses are arranged at the same side of the reflector in an array manner. Each of the compound lenses has a first lens portion and a second lens portion. The first lens portion is disposed between the second lens portion and the reflector. A surface of the first lens portion opposite to the reflector has a first radius of curvature, and a surface of the second lens portion opposite to the reflector has a second radius of curvature. The first radius of curvature has a length greater than the second radius of curvature.
Public/Granted literature
- US20150370157A1 PROJECTION SCREEN AND PROJECTION SYSTEM USING THE SAME Public/Granted day:2015-12-24
Information query
