Title:
OPTICAL WAVEGUIDE APPARATUS FOR DIFFRACTION DISPLAY, AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/134670
Kind Code:
A1
Abstract:
An optical waveguide apparatus (10), comprising a waveguide substrate (10a), and a coupling-in grating (11) and a coupling-out grating (12) which are disposed on the waveguide substrate (10a). The coupling-in grating (11) is configured to couple, into the waveguide substrate (10a), an input light beam from the outside of the waveguide substrate (10a) to be propagated to the coupling-out grating (12) by means of total reflection. The coupling-in grating (11) has a grating vector direction (G) pointing to the coupling-out grating (12). The coupling-out grating (12) comprises a one-dimensional region (12B, 12C) where one-dimensional gratings are formed and a two-dimensional region (12A) where a two-dimensional grating is formed. The coupling-out grating (12) based on the one-dimensional gratings and the two-dimensional grating which are mixed can not only realize two-dimensional expansion of light in a plane, but also effectively improve the light utilization/coupling efficiency of the optical waveguide apparatus (10).
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Inventors:
FAN ZHENTAO (CN)
ZHAO XINGMING (CN)
TIAN KEHAN (CN)
ZHAO XINGMING (CN)
TIAN KEHAN (CN)
Application Number:
PCT/CN2023/071570
Publication Date:
July 20, 2023
Filing Date:
January 10, 2023
Export Citation:
Assignee:
JIAXING UPHOTON OPTOELECTRONICS TECH CO LTD (CN)
International Classes:
G02B6/10
Foreign References:
| CN114545549A | 2022-05-27 | |||
| CN113777707A | 2021-12-10 | |||
| CN111065953A | 2020-04-24 | |||
| CN111830715A | 2020-10-27 | |||
| CN213690119U | 2021-07-13 | |||
| US10429645B2 | 2019-10-01 |
Attorney, Agent or Firm:
BEIJING FANGKE LAW FIRM (CN)
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