Multi-line scanning display for near-eye displays
AssigneeFacebook Technologies, LLC
InventorsWanli Chi, Yijing Fu, Pasi Saarikko
Life of this patent
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Abstract
A scanning display includes a light source and a scanning assembly. The light source is configured to emit source light from a plurality of rows of emitters that are arranged parallel to a first dimension. The scanning assembly includes at least one optical element that conditions the source light. The scanning assembly is configured to scan the conditioned source light along a second dimension that is orthogonal to the first dimension. The scanning assembly configured to output the scanned light over a portion of a target area of an output waveguide. And a brightness of the scanned image light offsets dimming caused by the output waveguide expanding the scanned light in at least one dimension.
Claims19
A scanning display comprising:
- a light source configured to emit source light from a plurality of rows of emitters parallel to a first dimension;
- a scanning assembly configured to:
- condition the source light,
- scan the conditioned source light along a second dimension orthogonal to the first dimension by dynamically adjusting directions of the conditioned source light using an optical element of the scanning assembly having a plurality of lenses to form scanned image light, a pupil of the optical element located from the optical element at a non-zero distance of less than 250 microns, and
- output the scanned image light;
- and
- a waveguide configured to:
- in-couple the scanned image light,
- expand the scanned image light in at least one dimension to form expanded image light, and
- decouple the expanded image light from the waveguide.
A method comprising:
- emitting source light from a plurality of rows of emitters parallel to a first dimension;
- conditioning the source light;
- scanning, by a scanning assembly, the conditioned source light along a second dimension orthogonal to the first dimension by dynamically adjusting directions of the conditioned source light using an optical element of the scanning assembly having a plurality of lenses to form scanned image light, a pupil of the optical element located from the optical element at a non-zero distance of less than 250 microns;
- outputting the scanned image light from the scanning assembly;
- in-coupling the scanned image light at a waveguide;
- expanding, by the waveguide, the scanned image light in at least one dimension to form expanded image light;
- and
- decoupling the expanded image light from the waveguide.
A headset comprising:
- a light source configured to emit source light from a plurality of rows of emitters parallel to a first dimension;
- a scanning assembly configured to:
- condition the source light,
- scan the conditioned source light along a second dimension orthogonal to the first dimension by dynamically adjusting directions of the conditioned source light using an optical element of the scanning assembly having a plurality of lenses to form scanned image light, a pupil of the optical element located from the optical element at a non-zero distance of less than 250 microns, and
- output the scanned image light;
- and
- a waveguide configured to:
- in-couple the scanned image light,
- expand the scanned image light in at least one dimension to form expanded image light, and
- decouple the expanded image light from the waveguide to an eyebox of the headset.
Dependencies are inferred from the claim text.