Title:
PROJECTION SCREEN, PROJECTION SYSTEM, DIE AND DIE MASTER
Document Type and Number:
WIPO Patent Application WO/2024/022515
Kind Code:
A1
Abstract:
A projection screen (10), a projection system (100), a die (500), and a die master. The projection screen (10) comprises a surface layer (11), a reflective layer (13), and a Fresnel lens layer (12); a plurality of Fresnel microstructures (121) are provided on the side of the Fresnel lens layer (12) close to the reflective layer (13), and the centers of the plurality of Fresnel microstructures (121) are the same; each Fresnel microstructure (121) has a first surface (1211) and a second surface (1212) connected to each other; the first surface (1211) is obliquely arranged; and a first included angle (ɑ) formed by the first surface (1211) and the surface of the side of the surface layer (11) close to the Fresnel lens layer (12) is related to a first target coefficient and a second included angle, the first target coefficient is related to the radius of the Fresnel microstructures (121), and the second included angle is any value within a first range.
Inventors:
XIAO WEI (CN)
FENG YU (CN)
HOU RUI (CN)
FENG YU (CN)
HOU RUI (CN)
Application Number:
PCT/CN2023/109959
Publication Date:
February 01, 2024
Filing Date:
July 28, 2023
Export Citation:
Assignee:
HISENSE LASER DISPLAY CO LTD (CN)
International Classes:
G03B21/602; B29C59/02; G02B3/08
Foreign References:
| CN115343908A | 2022-11-15 | |||
| CN115343909A | 2022-11-15 | |||
| CN109917613A | 2019-06-21 | |||
| JP2015069110A | 2015-04-13 | |||
| CN113219779A | 2021-08-06 | |||
| CN115390353A | 2022-11-25 | |||
| CN111103640A | 2020-05-05 | |||
| JP2012252057A | 2012-12-20 |
Attorney, Agent or Firm:
BEIJING ZBSD PATENT & TRADEMARK AGENT LTD. (CN)
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