Title:
MULTILAYER DIFFRACTIVE OPTICAL WAVEGUIDE DEVICE AND NEAR-EYE DISPLAY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/126015
Kind Code:
A1
Abstract:
A multilayer diffractive optical waveguide device and a near-eye display apparatus, the multi-layer diffractive optical waveguide device comprising: a plurality of waveguides (110, 120) and a plurality of diffractive microstructure layers (210, 220, 230), the plurality of waveguides (110, 120) being arranged at intervals. The plurality of diffractive microstructure layers (210, 220, 230) comprise: a first diffractive microstructure layer (210) and a second diffractive microstructure layer (220). The first diffractive microstructure layer (210) is arranged on the incident side of the outermost waveguide (110); and the second diffractive microstructure layer (220) is arranged between adjacent waveguides (110, 120). The first diffractive microstructure layer (210) and the second diffractive microstructure layer (220) are positioned in the same region in the direction of thickness of the plurality of waveguides (110, 120), and the areas of the first diffractive microstructure layer (210) and the second diffractive microstructure layer (220) progressively decrease or increase along the direction of beam expansion. The present invention solves the problem of single-layer optical waveguides having a low rate of energy utilisation due to some optical signals being transmitted to the outside in the in-coupling region, and the problem of uneven brightness and sparse exit pupil expansion when the waveguide displays a solid colour image due to the attenuation of energy in the out-coupling region.
Inventors:
LAN FUYANG (CN)
GUAN JIAN (CN)
SHAO CHENDI (CN)
ZHOU XING (CN)
XU SONG (CN)
GUAN JIAN (CN)
SHAO CHENDI (CN)
ZHOU XING (CN)
XU SONG (CN)
Application Number:
PCT/CN2023/074660
Publication Date:
July 06, 2023
Filing Date:
February 06, 2023
Export Citation:
Assignee:
ZHUHAI MOJIE TECH CO LTD (CN)
International Classes:
G02B27/01; G02B6/00
Foreign References:
| CN114200570A | 2022-03-18 | |||
| CN110908125A | 2020-03-24 | |||
| CN111562644A | 2020-08-21 | |||
| CN111308598A | 2020-06-19 | |||
| CN113168003A | 2021-07-23 | |||
| US10534176B1 | 2020-01-14 |
Attorney, Agent or Firm:
JOHNSON INTELLECTUAL PROPERTY AGENCY (SHENZHEN) (CN)
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