Ultrasonic hologram generation
AssigneeMeta Platforms Technologies, LLC
InventorsYoumin Wang, Yatong An, Yuri Toride
Life of this patent
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Abstract
Embodiments described include a head mounted display (HMD) including an ultrasound array configured to emit ultrasound signals to dynamically arrange micro-particles into a hologram. The hologram includes an image that is viewable when the micro-particles are illuminated by a light source. In some embodiments, the image included in the hologram is viewable from an eyebox region of a head mounted display.
Claims17
A head mounted display comprising:
- an ultrasound array configured to emit ultrasound signals to dynamically arrange micro-particles into a hologram that includes an image when the micro-particles are illuminated with illumination light within a wavelength band, wherein the ultrasound array is disposed in a lens element of the head mounted display;
- and
- a light source configured to illuminate the dynamically arranged micro-particles with the illumination light within the wavelength band so that the image included in the hologram is viewable from an eyebox region of the head mounted display.
A method comprising:
- dynamically arranging micro-particles into a hologram that includes an image, wherein dynamically arranging the micro-particles into the hologram includes manipulating an orientation or position of the micro-particles using ultrasound signals from an ultrasound array, and manipulating the orientation or position of the micro-particles includes manipulating micro-particles within a holographic medium included in a layer in a lens of a head mounted device;
- and
- illuminating the dynamically arranged micro-particles with illumination light within a wavelength band to make the image of the hologram viewable by an eye.
A non-transitory machine-accessible storage medium that provides instructions that, when executed by a machine, will cause the machine to perform operations comprising:
- causing an ultrasound array to transmit signals to dynamically arrange micro-particles into a hologram that includes an image, wherein to dynamically arrange the micro-particles into the hologram includes manipulating an orientation or position of the micro-particles using ultrasound signals from an ultrasound array;
- causing a light source to illuminate the dynamically arranged micro-particles with illumination light within a wavelength band to make the image of the hologram viewable by an eye;
- and
- adjusting an intensity of the light source according to a distance of the hologram from a head mounted device (HMD).
Dependencies are inferred from the claim text.