US 11,940,627 B2
Opaque waveguide optical engine assembly for head-mounted device
Stephen Pombo, Campbell, CA (US); and Christopher Parkinson, Richland, WA (US)
Assigned to RealWear, Inc., Vancouver, WA (US)
Filed by RealWear, Inc., Vancouver, WA (US)
Filed on Nov. 30, 2021, as Appl. No. 17/538,712.
Claims priority of provisional application 63/220,237, filed on Jul. 9, 2021.
Prior Publication US 2023/0010198 A1, Jan. 12, 2023
Int. Cl. G02B 27/01 (2006.01); G02B 27/09 (2006.01); G02B 6/00 (2006.01); G02B 6/34 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 27/0101 (2013.01); G02B 27/0972 (2013.01); G02B 6/00 (2013.01); G02B 6/34 (2013.01); G02B 2027/0118 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0125 (2013.01); G02B 27/017 (2013.01); G02B 2027/0178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A waveguide optical engine assembly comprising:
a housing;
a waveguide having a display surface and a rear surface, the rear surface having an input portion;
a light shield configured to prevent light from passing through the light shield;
a microprojector configured to project a source image; and
a prism assembly adapted to transfer the source image projected from the microprojector to the input portion of the waveguide,
wherein the source image received by the input portion of the waveguide is displayed in the display surface of the waveguide,
wherein the light shield is positioned adjacent to the rear surface of the waveguide such that a portion of the rear surface is covered by the light shield, and
wherein the waveguide, the light shield, the microprojector, and the prism assembly are at least partially enclosed within the housing.