Title:
ONE-WAY HOMOGENEOUS BEAM EXPANDING SCREEN AND THREE-DIMENSIONAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/027959
Kind Code:
A1
Abstract:
An one-way homogeneous beam expanding screen (20) and a three-dimensional display device. The one-way homogeneous beam expanding screen (20) comprises a lenticular grating (22) and at least one linear Fresnel lens (21); the linear Fresnel lens (21) is located between a projection unit (10) and the lenticular grating (22); the linear Fresnel lens (21) comprises a plurality of tooth-shaped structures (211) extending in a second direction (x); the linear Fresnel lens (21) is used for deflecting a light beam emitted by the projection unit (10) and enabling the deflected light beam to be normally incident to the lenticular grating (22); a grating line (221) of the lenticular grating (22) extends along the second direction (x); the lenticular grating (22) is used for uniformly expanding a light beam emitted by the linear Fresnel lens (21) along a first direction (y), wherein the first direction (y) intersects with the second direction (x).
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Inventors:
LU ZENGXIANG (CN)
Application Number:
PCT/CN2021/078851
Publication Date:
February 10, 2022
Filing Date:
March 03, 2021
Export Citation:
Assignee:
FAITH BILLION TECH DEVELOPMENT LIMITED (CN)
International Classes:
G02B30/29
Foreign References:
| CN111929914A | 2020-11-13 | |||
| CN108761819A | 2018-11-06 | |||
| CN1725103A | 2006-01-25 | |||
| CN105445833A | 2016-03-30 | |||
| CN105988225A | 2016-10-05 | |||
| US20110222151A1 | 2011-09-15 | |||
| CN202010789272A | 2020-08-07 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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