Patents by Inventor Hee-Yoon Lee

Hee-Yoon Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210141130
    Abstract: A waveguide display includes an image light source for emitting polychromatic image light, and a waveguide of high-index material for transmitting polychromatic image light to an eyebox. The waveguide has an input grating and an offset output grating. The output grating is configured so that ambient light diffracted by the output grating is directed away from the eyebox or out of at least a central portion of the field of view so as to lessen the appearance of visual artifacts.
    Type: Application
    Filed: November 12, 2019
    Publication date: May 13, 2021
    Inventors: Hee Yoon Lee, Pasi Saarikko
  • Publication number: 20210143596
    Abstract: The present invention relates to a connection having a joint with a limited range of motion, the connector including: a connection connector including a connection signal pin, a connection dielectric surrounding the connection signal pin, and a connection ground electrically insulated from the connection signal pin by the connection dielectric; and a first fixed connector into which one side of the connection connector is inserted and which allows a joint of the connection connector to move on the basis of the inserted one side of the connection connector, wherein the connection ground includes a connection protruding portion formed so that one end of the connection ground protrudes outward, a connection limiting portion which is adjacent to the connection protruding portion, has a thickness smaller than a thickness of the connection protruding portion, and comes in contact with an inner side of the first fixed connector to limit a range of motion of the joint of the connection connector, a connection elastic
    Type: Application
    Filed: September 30, 2020
    Publication date: May 13, 2021
    Inventors: Kyung Hun JUNG, Sun Hwa CHA, Hwa Yoon SONG, Chang Hyun YANG, Jae Jun LEE, Sang Min SEO, Hee seok JUNG
  • Publication number: 20210124108
    Abstract: A display waveguide configured for conveying polychromatic image light to a viewer includes a substrate and a higher-index layer supported by the substrate. The high-index layer supports the transmission of the longer-wavelength color channel of the image light in at least a portion of the field of view.
    Type: Application
    Filed: January 10, 2020
    Publication date: April 29, 2021
    Inventor: Hee Yoon Lee
  • Publication number: 20210124170
    Abstract: A display waveguide configured for conveying image light to a viewer has a waveguide body which refractive index varies in the thickness direction to include a high-index region between lower-index regions. Multi-layer and gradient index implementations are described. The waveguide transmits a portion of image light within the high-index region of the waveguide to provide a wider field of view.
    Type: Application
    Filed: January 10, 2020
    Publication date: April 29, 2021
    Inventor: Hee Yoon Lee
  • Patent number: 10989880
    Abstract: An optical waveguide is disclosed. The optical waveguide includes a plate of transparent material comprising opposed first and second surfaces for guiding an optical beam between the surfaces by at least one of reflection or diffraction. A diffraction grating is disposed at the first surface for spreading the optical beam by diffracting portions thereof into a non-zero diffraction order to propagate inside the plate. The first diffraction grating includes an array of parallel grooves structured to provide a spatial variation of optical phase of the portions of the optical beam diffracted by the first diffraction grating into the non-zero diffraction order.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: April 27, 2021
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventor: Hee Yoon Lee
  • Patent number: 10976555
    Abstract: A waveguide display is used for presenting media to a user. The waveguide display includes a light source assembly, an output waveguide, and a controller. The light source assembly projects an image light at least along one dimension. The output waveguide includes a waveguide body with two opposite surfaces. The output waveguide includes an input area, an output area, a first diffractive element on the first side, and a second diffractive element on the second side of the output waveguide. The output area is located between the input area and the first and second diffractive elements. The first and second diffractive elements reflect a second portion of the expanded image light back toward the output area for outcoupling to the eyebox. The controller controls the scanning of the light source assembly to form a two-dimensional image.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: April 13, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Wanli Chi, Hee Yoon Lee
  • Patent number: 10948873
    Abstract: A system for making a holographic medium includes a light source configured to provide light and a beam splitter configured to separate the light into a first portion of the light and a second portion of the light that is spatially separated from the first portion of the light. The system also includes a first set of optical elements configured to transmit the first portion of the light for providing a first wide-field beam onto an optically recordable medium, a second set of optical elements configured to transmit the second portion of the light through for providing a second wide-field beam, and a plurality of lenses optically coupled with the second set of optical elements configured to receive the second wide-field beam and project a plurality of separate light patterns onto the optically recordable medium for forming the holographic medium.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: March 16, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Ganghun Kim, Andrew Maimone, Alexander Jobe Fix, Robert Dale Cavin, Hee Yoon Lee, Matthieu Charles Raoul Leibovici, Brian Wheelwright, Douglas Robert Lanman
  • Patent number: 10942378
    Abstract: A pupil-replicating waveguide suitable for operation with a coherent light source is disclosed. A waveguide body has opposed surfaces for guiding a beam of image light. An out-coupling element is disposed in an optical path of the beam for out-coupling portions of the beam at a plurality of spaced apart locations along the optical path. Electrodes are coupled to at least a portion of the waveguide body for modulating an optical path length of the optical path of the beam to create time-varying phase delays between the portions of the beam out-coupled by the out-coupling element.
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: March 9, 2021
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventors: Andrew Maimone, Andrew Ouderkirk, Hee Yoon Lee, Ningfeng Huang, Maxwell Parsons, Scott Charles McEldowney, Babak Amirsolaimani, Pasi Saarikko, Wanli Chi, Giuseppe Calafiore, Alexander Koshelev, Barry David Silverstein, Lu Lu, Wai Sze Tiffany Lam, Gang Li, Stephan Lutgen, Francois Olivier, David Massoubre
  • Patent number: 10942489
    Abstract: A method includes providing light from a light source and separating the light into a first portion of the light and a second portion of the light that is spatially separated from the first portion of the light. The method also includes transmitting the first portion of the light through a first set of optical elements to provide a first wide-field beam, transmitting the second portion of the light through a second set of optical elements to provide a second wide-field beam that is spatially separated from the first wide-field beam, and transmitting the second wide-field beam through a third set of optical elements to provide a plurality of separate light patterns. The method further includes concurrently projecting the first wide-field beam and the plurality of separate light patterns onto an optically recordable medium to form a holographic medium.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: March 9, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Ganghun Kim, Andrew Maimone, Alexander Jobe Fix, Robert Dale Cavin, Hee Yoon Lee, Matthieu Charles Raoul Leibovici, Brian Wheelwright, Douglas Robert Lanman
  • Patent number: 10942320
    Abstract: An optical device (e.g., a pupil expander) includes a waveguide with a slanted facet. The optical device includes a reflector on the slanted facet and a prism, or a grating at the slanted facet. The prism or the grating compensates for the dispersion of an image light from a display, which reduces smearing of displayed images. The waveguide can be configured for pupil replication in one-dimension or two-dimensions.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: March 9, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Wanli Chi, Hee Yoon Lee
  • Publication number: 20210055460
    Abstract: A pupil replication waveguide for a projector display includes a slab of transparent material for propagating display light in the slab via total internal reflection. A diffraction grating is supported by the slab. The diffraction grating includes a plurality of tapered slanted fringes in a substrate for out-coupling the display light from the slab by diffraction into a blazed diffraction order. A greater portion of the display light is out-coupled into the blazed diffraction order, and a smaller portion of the display light is out-coupled into a non-blazed diffraction order. The tapered fringes result in the duty cycle of the diffraction grating varying along the thickness direction of the diffraction grating, to facilitate suppressing the portion of the display light out-coupled into the non-blazed diffraction order.
    Type: Application
    Filed: August 23, 2019
    Publication date: February 25, 2021
    Inventors: Hee Yoon Lee, Ningfeng Huang, Pasi Saarikko, Yu Shi, Giuseppe Calafiore, Nihar Ranjan Mohanty
  • Publication number: 20210055689
    Abstract: Techniques disclosed herein relate to modifying refractive index modulation in a holographic optical element, such as a holographic grating. According to certain embodiments, a holographic optical element or apodized grating includes a polymer layer comprising a first region characterized by a first refractive index and a second region characterized by a second refractive index. The holographic optical element or apodized grating includes a plurality of nanoparticles dispersed in the polymer layer. The nanoparticles have a higher concentration in either the first region or the second region. In some embodiments, the nanoparticles may be configured to increase the refractive index modulation. In some embodiments, the nanoparticles may be configured to apodize the grating by decreasing the refractive index modulation proximate to sides of the grating. The refractive index may be modulated by applying a monomer reservoir buffer layer to the polymer layer, either before or after hologram fabrication.
    Type: Application
    Filed: August 23, 2019
    Publication date: February 25, 2021
    Inventors: Matthieu Charles Raoul LEIBOVICI, Austin LANE, Wanli CHI, Hee Yoon LEE
  • Patent number: 10930187
    Abstract: A waveguide display includes a light source, a conditioning lens assembly, a scanning mirror assembly, and a controller. The light source includes a plurality of source elements that are configured to emit image light in accordance with scanning instructions. The conditioning lens assembly transmits conditioned light based in part on the image light. The scanning mirror assembly scans the conditioned image light to particular locations as scanned image light in accordance with scanning instructions. The output waveguide includes an input area and an output area, receives the scanned image light emitted from the scanning mirror assembly at the input area, and outputs the expanded image light from a portion of the output area based in part on a direction of the expanded light output from the scanning mirror assembly. The controller generates the scanning instructions and provides the scanning instructions to the light source and the scanning mirror assembly.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: February 23, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Wanli Chi, Pasi Saarikko, Hee Yoon Lee
  • Patent number: 10928635
    Abstract: A headset includes a display assembly. The display assembly has a primary portion and a peripheral portion. The primary portion of the display assembly is configured to emit a first portion of image light, and has a first field of view (FOV). The peripheral portion of the display assembly is configured to emit a second portion of the image light over a second FOV, and the peripheral portion is canted relative to the primary portion. The emitted first portion of image light and the emitted second portion of image light create a composite FOV from the perspective of an eyebox, and a seam between the first FOV and the second FOV is located in a peripheral region of the composite FOV.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: February 23, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Nicholas Daniel Trail, Andrew John Ouderkirk, Pasi Saarikko, Sharvil Shailesh Talati, Hee Yoon Lee, Behnam Bastani
  • Patent number: 10914956
    Abstract: A headset includes a first waveguide display and a second waveguide display. The first waveguide display is configured to emit a first portion of image light, the first waveguide display having a first field of view (FOV). The second display assembly is configured to emit a second portion of the image light, and the second display assembly has a second FOV. The first waveguide display and the second display assembly are tiled such that the emitted first portion of image light and the emitted second portion of image light create a tiled FOV from a perspective of an eyebox. And a seam between the first FOV and the second FOV is located in a peripheral region of the tiled FOV.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: February 9, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Nicholas Daniel Trail, Andrew John Ouderkirk, Pasi Saarikko, Sharvil Shailesh Talati, Hee Yoon Lee, Behnam Bastani, Hagar Edelstain
  • Patent number: 10911743
    Abstract: A display system is presented for displaying a color stereoscopic image comprising first and second images for user's left and right eyes respectively. A first display is configured for displaying first and second color channels of the first image to the left eye, such that a field of view of the first color channel of the first image is offset from a field of view of the second color channel of the first image in a first direction. A second display is configured for displaying first and second color channels of the second image to the right eye, such that a field of view of the first color channel of the second image is offset from a field of view of the second color channel of the second image in a second direction opposite to the first direction.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: February 2, 2021
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventors: Ningfeng Huang, Hee Yoon Lee
  • Publication number: 20210017150
    Abstract: A system for making a holographic medium for use in generating light patterns for eye tracking includes a light source configured to provide light and a beam splitter configured to separate the light into a first portion of the light and a second portion of the light that is spatially separated from the first portion of the light. The system also includes a first set of optical elements configured to transmit the first portion of the light for providing a first wide-field beam onto an optically recordable medium and one or more diffractive optical elements configured to receive the second portion of the light and project a plurality of separate light patterns onto the optically recordable medium for forming the holographic medium.
    Type: Application
    Filed: October 6, 2020
    Publication date: January 21, 2021
    Inventors: Ganghun KIM, Andrew MAIMONE, Alexander Jobe FIX, Robert Dale CAVIN, Hee Yoon LEE, Matthieu Charles Raoul LEIBOVICI, Brian WHEELWRIGHT, Douglas Robert LANMAN
  • Patent number: 10877280
    Abstract: A near-eye display includes a light source assembly, a first waveguide, an output waveguide, and a controller. The light source assembly emits image light including light within a first band and a second band. The first waveguide receives the image light, expands the received image light in at least one dimension, and outputs an image light. The output waveguide includes an output area and a plurality of input areas. Each input area receives the image light from the first waveguide. The output waveguide includes a holographic Bragg grating and the output waveguide expands the image light at least along two dimensions to form an expanded image light, and outputs the expanded image light toward an eyebox. The controller controls the scanning of the light source assembly and the first waveguide.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: December 29, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Hee Yoon Lee, Wanli Chi, Pasi Saarikko
  • Patent number: 10861415
    Abstract: A wearable display device and a calibration method for the wearable display device are provided. The wearable display device or its component(s) may exhibit optical throughput dependent on beam angle or beam coordinate at the eyebox. The linear or angular dependencies of throughput may be accounted for when generating an image to be displayed, to lessen or offset these dependencies during operation of the wearable display.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: December 8, 2020
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventors: Yijing Fu, Pasi Saarikko, Hee Yoon Lee, Wanli Chi
  • Patent number: 10845596
    Abstract: A waveguide display includes a substrate having two opposite surfaces, and a slanted grating at a first surface of the two opposite surfaces of the substrate. The slanted grating includes a plurality of ridges and is characterized by a grating period in one direction. The plurality of ridges is tilted at a slant angle with respect to a surface normal of the first surface and is characterized by a height. The height of the plurality of ridges, the grating period, and the slant angle are configured to cause destructive interference between ambient light diffracted by the slanted grating. In some embodiments, a difference between the height of the plurality of ridges and an integer multiple of the grating period divided by the tangent of the slant angle is less than a threshold value.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: November 24, 2020
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventors: Hee Yoon Lee, Ningfeng Huang, Giuseppe Calafiore, Pasi Saarikko