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US 10,571,696 B2Granted
Near-to-eye display device
AssigneeCY Vision Inc.
InventorsHakan Urey, Erdem Ulusoy
Life of this patent
Estimating the term…
Abstract
A near-to-eye display device includes a spatial light modulator. The spatial light modulator modulates an illumination wave to create a virtual-scene wave that is steered to a useful portion of an exit pupil plane. Higher diffraction orders and noise beams are filtered out by the user's pupil acting as a spatial filter.
Claims24
A head-worn display device comprising:
- a computer unit;
- at least one point light source mounted on the head-worn display device;
- and
- at least one spatial light modulator (SLM) mounted on the head-worn display device and operatively coupled to the computer unit;
- wherein light produced by the at least one point light source illuminates the SLM and gets modulated to produce modulated light, and the modulated light is directed on an exit pupil plane that includes a useful portion,
- wherein a light wave distribution within the useful portion is equal to a computed light distribution from a virtual scene,
- wherein the useful portion is steerable across the exit pupil plane to follow a motion of a user's eye pupil relative to user's eye when the head-worn display device is in use so that the user's eye pupil acts as a spatial filter,
- wherein the computer unit adds a controlled phase variation to the computed light distribution of the virtual scene such that speckle is reduced, and
- wherein the controlled phase variation includes a phase delay variation such that individual waves from the virtual scene points arrive to the useful portion in-phase to reduce speckle.
6 more elements
A head-worn display device comprising:
- a computer unit;
- at least one point light source mounted on the head-worn display device;
- and
- at least one spatial light modulator (SLM) mounted on the head-worn display device and operatively coupled to the computer unit;
- wherein light produced by the at least one point light source illuminates the SLM and gets modulated to produce modulated light, and the modulated light is directed on an exit pupil plane that includes a useful portion,
- wherein a light wave distribution within the useful portion is equal to a computed light distribution from a virtual scene,
- wherein the useful portion is steerable across the exit pupil plane to follow a motion of a user's eye pupil relative to user's eye when the head-worn display device is in use so that the user's eye pupil acts as a spatial filter,
- wherein the computer unit adds a controlled phase variation to the computed light distribution of the virtual scene such that speckle is reduced, and
- wherein the controlled phase variation includes a phase delay variation to produce a smoothly interpolated version of a plurality of points on a user's retina to reduce speckle.
6 more elements
A head-worn display device comprising:
- a computer unit;
- at least one point light source mounted on the head-worn display device;
- and
- at least one spatial light modulator (SLM) mounted on the head-worn display device and operatively coupled to the computer unit;
- wherein light produced by the at least one point light source illuminates the SLM and the computer unit controls the SLM to produce modulated light, and wherein the modulated light is directed on an exit pupil plane that includes a useful portion,
- wherein the computer unit computes a computed light distribution from a virtual scene that is equal to a light wave distribution within the useful portion,
- wherein the computer unit steers the useful portion across the exit pupil plane to follow a motion of a user's eye pupil relative to user's eye when the head-worn display device is in use so that the user's eye pupil acts as a spatial filter, and
- wherein the computer unit adds a controlled phase variation to the computed light distribution of the virtual scene such that speckle is reduced, wherein the controlled phase variation includes a phase delay variation to the virtual-scene points such that optical path lengths between the useful portion and the virtual-scene points differ by an integer multiple of a center wavelength of the at least one light source.
5 more elements
Dependencies are inferred from the claim text.