US 12,352,977 B2
Waveguide system for near eye optical displays
David Nicholas Crosby, Oxford (GB); Hutch Hayman Hutchison, Churt (GB); and Philip Andrew Greenhalgh, Battle (GB)
Assigned to Snap Inc., Santa Monica, CA (US)
Filed by Snap Inc., Santa Monica, CA (US)
Filed on Mar. 16, 2022, as Appl. No. 17/655,063.
Claims priority of provisional application 63/161,930, filed on Mar. 16, 2021.
Prior Publication US 2022/0299778 A1, Sep. 22, 2022
Int. Cl. G02B 27/01 (2006.01); B29D 11/00 (2006.01); G02B 6/42 (2006.01); G02C 11/00 (2006.01)
CPC G02B 27/0176 (2013.01) [B29D 11/00413 (2013.01); G02B 6/4251 (2013.01); G02C 11/10 (2013.01); G02B 2027/0178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An encapsulated waveguide system for a near eye optical display, comprising:
a first outer layer,
a second outer layer,
at least one waveguide substrate comprising an input area and an output area,
a first spacer, and
a sealing element,
wherein the at least one waveguide substrate is disposed between the first and second outer layers and spaced therefrom by the first spacer wherein the sealing element joins edges of the first and second outer layers so as to encapsulate the at least one waveguide substrate within a cavity formed by the first and second outer layers; and
wherein the formed cavity comprises a first cavity between the at least one waveguide substrate and the first outer layer and a second cavity between the at least one waveguide substrate and the second outer layer, the first cavity having an identical pressure to the second cavity.