Title:
DIFFRACTION WAVEGUIDE DEVICE, DISPLAY DEVICE, AND MANUFACUTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/082216
Kind Code:
A1
Abstract:
A diffraction waveguide device comprises an optical waveguide substrate (1) and a coupling grating (2). The coupling grating (2) is disposed at an end face of a side of the substrate. The coupling grating (2) comprises at least two surface-relief grating layers (20, 21, 22) stacked together. Two adjacent ones of the surface-relief grating layers (20, 21, 22) are supported, in a spaced-apart manner, by an intermediate layer (23) therebetween. The at least two surface-relief grating layers (20, 21, 22) are configured to each diffract a corresponding ray in the light such that the diffracted rays all propagate in the optical waveguide substrate (1). The diffraction waveguide device has a reduced thickness by means of omitting two additional optical waveguide substrates. Accordingly, the invention is helpful for achieving small-sized and low-cost diffraction waveguide devices.
Inventors:
WANG ZHE (CN)
YANG JILIN (CN)
ZOU QUANBO (CN)
ZHAO DONGFENG (CN)
YANG JILIN (CN)
ZOU QUANBO (CN)
ZHAO DONGFENG (CN)
Application Number:
PCT/CN2018/111257
Publication Date:
April 30, 2020
Filing Date:
October 22, 2018
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
G02B27/42; G02B5/18; G02B6/00; G02B27/01; G02B27/02
Foreign References:
| CN1637459A | 2005-07-13 | |||
| CN104903774A | 2015-09-09 | |||
| CN102709419A | 2012-10-03 | |||
| CN107797287A | 2018-03-13 | |||
| CN102119415A | 2011-07-06 | |||
| US20110242661A1 | 2011-10-06 |
Attorney, Agent or Firm:
BEYOND TALENT PATENT AGENT FIRM (CN)
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