Patent ID: 11871161
Assignee: META PLATFORMS TECHNOLOGIES, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A display device comprising:
a projector for providing image light carrying an image in angular domain for displaying by the display device;
a pupil expander operably coupled to the projector for relaying the image light to an eyebox of the display device, wherein optical throughput of the pupil expander has a first dependence on a beam angle and a beam coordinate at the eyebox; and
a controller operably coupled to the projector and configured to:
obtain basis vectors and reconstruction coefficients representing a compressed approximation of the first dependence;
determine calibration data from the basis vectors and the reconstruction coefficients, for applying to the image to at least partially offset the first dependence; and
apply the calibration data to the image.