US 12,681,315 B2 · Display devices with in-field calibration

Abstract

A head-mounted device may include a first display having a first projector and a first waveguide, a second display having a second projector and a second waveguide, first and second cameras, an optical sensor that couples the first waveguide to the second waveguide, and position sensors mounted to the first and second cameras and the optical sensor. The optical sensor may gather image sensor data from first image light propagating in the first waveguide and second image light propagating in the second waveguide. The cameras may capture real-world images. The position sensors may gather position measurements. Control circuitry may calibrate optical misalignment in the device by adjusting the first and/or second image light based on the image sensor data, the position measurements, and/or the world light.

Claims20

Dependent claims

An electronic device, comprising:

a housing having a frame with a nose bridge and having temples coupled to the frame by hinges;
a projector in the housing and configured to output light;
a waveguide in the housing and configured to propagate the light;
an optical coupler on the waveguide and configured to couple a first portion of the light out of the waveguide while passing a second portion of the light;
an optical sensor at the nose bridge and configured to generate sensor data in response to the second portion of the light;
and
an inertial measurement unit at the nose bridge, affixed to the optical sensor, and configured to measure orientation information, the projector being configured to adjust the light based on the sensor data and the orientation information.

4 more elements

A method of operating a head-mounted device comprising:

with a first projector in a first display in a first portion of a housing, producing first light that is coupled into a first waveguide in the first display;
with a second projector in a second display in a second portion of the housing, producing second light that is coupled into a second waveguide in the second display;
with a first camera in the first portion of the housing, capturing a first image of world light;
with a second camera in the second portion of the housing, capturing a second image of the world light;
with an optical sensor, receiving a portion of the first light from the first waveguide and a portion of the second light from the second waveguide and generating sensor data from the portion of the first light and the portion of the second light;
with a first inertial measurement unit at the first camera and in the first portion of the housing, gathering a first position measurement;
with a second inertial measurement unit at the second camera and in the second portion of the housing, gathering a second position measurement;
and
with one or more processors, adjusting the first light based on the sensor data, the first position measurement, and the second position measurement.

6 more elements

Dependencies are inferred from the claim text.

Display devices with in-field calibration

Life of this patent

Display devices with in-field calibration

Life of this patent

Abstract

Claims20