Patent ID: 11863912
Assignee: META PLATFORMS TECHNOLOGIES, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 16:
17. A display device comprising:
a scanning image projector comprising a wavelength-tunable light source for providing a light beam coupled to a scanner for scanning the light beam; and
a pupil-replicating lightguide coupled to the scanning image projector for providing multiple offset portions of the scanned light beam to an eyebox of the display device, the pupil-replicating lightguide comprising a plurality of volume Bragg gratings; and
a controller operably coupled to the scanning image projector for scanning the light beam in coordination with varying optical power of the light beam to provide an angular domain image;
wherein the controller is configured to tune the wavelength-tunable light source in coordination with the scanning such that an instantaneous wavelength of the wavelength-tunable light source corresponds to a portion of the angular domain image being formed by the scanning.