US 12,282,182 B2
Reflector orientation of geometrical and mixed waveguide for reducing grating conspicuity for near-eye displays
Wai Sze Tiffany Lam, Lynnwood, WA (US); Wanli Chi, Sammamish, WA (US); Yang Yang, Redmond, WA (US); and Dominic Meiser, Bothell, WA (US)
Assigned to META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Dec. 9, 2022, as Appl. No. 18/063,913.
Prior Publication US 2024/0192427 A1, Jun. 13, 2024
Int. Cl. F21V 8/00 (2006.01); G02B 27/01 (2006.01); G06F 1/16 (2006.01)
CPC G02B 6/0035 (2013.01) [G02B 6/0016 (2013.01); G02B 27/0172 (2013.01); G06F 1/163 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0178 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A waveguide display system comprising:
a waveguide;
an input coupler configured to couple display light into the waveguide;
a first pupil expander; and
a second pupil expander,
wherein the first pupil expander is configured to deflect, at a first plurality of locations along a first direction, the display light towards the second pupil expander,
wherein the second pupil expander is configured to deflect, at a second plurality of locations along a second direction different from the first direction, the display light from the first pupil expander towards an eyebox of the waveguide display system, and
wherein at least one of the first pupil expander or the second pupil expander includes transflective mirrors that are tilted within the waveguide such that the transflective mirrors are inconspicuous when viewed from an oblique angle.