Title:
PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/204032
Kind Code:
A1
Abstract:
Disclosed is a projection device (1). The projection device comprises a lens (10), a lens rear shell (20) and an OFF light processing structure (40). The lens rear shell (20) is provided with an image light outlet (22) and an OFF light outlet (23), and the lens (10) is mounted at the image light outlet (22). The OFF light processing structure (40) is mounted at the OFF light outlet (23), and the OFF light processing structure (40) comprises a bottom surface (412), at least two first reflecting members (43) and a plurality of second reflecting members (45). The bottom surface (412) seals and blocks the OFF light outlet (23); the at least two first reflecting members (43) and the plurality of second reflecting members (45) extend from the bottom surface (412) to the interior of the lens rear shell (20); and the height of each first reflecting member (43) extending out of the bottom surface (412) is greater than the height of the second reflecting member (45) extending out of the bottom surface (412). The projection device (1) reduces OFF light incident on the lens (10), thereby improving the image contrast and imaging quality of the projection device (1).
Inventors:
ZHANG XIANGXIONG (CN)
CHEN CHEN (CN)
ZHANG KUO (CN)
JIANG YINGZHE (CN)
HU FEI (CN)
CHEN CHEN (CN)
ZHANG KUO (CN)
JIANG YINGZHE (CN)
HU FEI (CN)
Application Number:
PCT/CN2021/084193
Publication Date:
October 14, 2021
Filing Date:
March 30, 2021
Export Citation:
Assignee:
APPOTRONICS CORP LTD (CN)
International Classes:
G03B21/14
Foreign References:
| CN211956087U | 2020-11-17 | |||
| JP2008292953A | 2008-12-04 | |||
| CN203859378U | 2014-10-01 | |||
| CN209299423U | 2019-08-23 | |||
| CN207164452U | 2018-03-30 | |||
| CN209311283U | 2019-08-27 |
Download PDF: