Patents by Inventor Yijing Fu

Yijing Fu 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).

  • Patent number: 11002969
    Abstract: A light projection system includes a light source configured to emit image light and an optical assembly configured to provide positive optical power to the image light and optically correct the image light. The optical assembly comprises a plurality of optical elements configured to correct differential distortion related to the image light across a field of view (FOV) within a threshold amount. The differential distortion is corrected based in part on asymmetry of the plurality of optical elements relative to an optical axis shared by the plurality of optical elements.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: May 11, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Michael Patrick Schaub, Byron Taylor, Yijing Fu
  • Publication number: 20210133440
    Abstract: Systems and methods for adjusting an image based on pupil size are disclosed. Particularly, a system for adjusting an image being presented on a display includes a processor. The processor is configured to identify a size of a pupil of a user viewing an image presented on the display, determine an intensity map based at least on the size of the pupil, and adjust the intensity values of at least a portion of the image using the intensity map. The intensity map indicates an amount of adjustment to intensity values of at least a portion of the image being displayed.
    Type: Application
    Filed: November 4, 2019
    Publication date: May 6, 2021
    Inventors: Barry David Silverstein, Bo Zhang, Yijing Fu
  • Patent number: 10962777
    Abstract: A device includes a first light source device configured to transmit a first light in a first direction and a second light source device configured to transmit a second light in a second direction. The device also includes a first set of one or more lenses configured for directing the first light from the first light source device and the second light from the second light source device toward a first eye of a user. Also disclosed is a method that includes transmitting a first light and a second light through a first set of one or more lenses and directing the first light and the second light toward a first eye of a user. Further disclosed is a method for adjusting a distance between an eye and a lens of the first set of one or more lenses.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: March 30, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Brian Wheelwright, Jacques Gollier, Ying Geng, Yijing Fu
  • Patent number: 10948723
    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.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: March 16, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Wanli Chi, Yijing Fu, Pasi Saarikko
  • Patent number: 10914953
    Abstract: A tunable waveguide display includes a source waveguide, a first tunable lens (FTL), an output waveguide, and a second tunable lens (STL). The source waveguide receives light, expands the light in a first dimension, and outputs the expanded light. The FTL adjusts a wavefront of the expanded light to form adjusted light. The output waveguide receives the adjusted light, expands the adjusted light in a second dimension to form image light, and outputs the image light. The STL adjusts a wavefront of the image light. The FTL and the STL control an image plane of the image light.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: February 9, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Wai Sze Tiffany Lam, Yijing Fu, Lu Lu, Pasi Saarikko
  • Publication number: 20210033856
    Abstract: A near-eye display (NED) using a pupil expander to expand an eyebox of the NED may suffer from local variations of throughput and color reproduction introduced by the pupil expander of the display. To offset or compensate these variations, the pupil expander, e.g. a pupil-replicating waveguide, may be characterized at a plurality of non-uniformly spaced grid of test points, with the test points disposed more densely at areas of high spatial variation of the throughput or color shift introduced by the pupil expander. The throughput or color shift may be integrated over at least a portion of the field of view of the NED. To determine the areas of high spatial variation, an initial test may be performed at uniformly spaced test grid locations.
    Type: Application
    Filed: July 29, 2019
    Publication date: February 4, 2021
    Inventors: Bo Zhang, Yijing Fu
  • 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: 10712579
    Abstract: A vortex polarizer converts light having azimuthal polarization emitted at a light emitting surface of a light emitting diode (LED) into a converted light having linear polarization. The vortex polarizer includes a distribution of fast axes that vary as a function of azimuth angle. Each fast axis rotates a portion of the light having the azimuthal polarization to a portion of the converted light having linear polarization. The vortex polarizer may include linear photoalignment polymer (LPP) aligned to define the distribution of fast axes.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: July 14, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Christopher Percival, Yijing Fu
  • Patent number: 10712572
    Abstract: A light field camera capturing one or more light field frames including intensity and angle information of received light. The light field camera includes an array of pixels, a liquid crystal layer overlaying the array of pixels, and a controller. The controller controls, at each time instant, one or more voltages applied to the liquid crystal layer. The controller adjusts, based on the one or more voltages, the liquid crystal layer to control amounts of light at one or more angles transmitted through the liquid crystal layer and captured by the array of pixels as a light field frame. The controller can determine depth information based on the captured one or more light field frames.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: July 14, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Xinqiao Liu, Yijing Fu, Lu Lu
  • Patent number: 10714520
    Abstract: A method for monolithically fabricating a light field sensor with an array of microlens. Each microlens is formed directly on a surface including a plurality of pixels of the light field sensor formed on a wafer. The manufacturing system performs a preparation of the surface including the plurality of pixels formed on the wafer. The manufacturing system deposits a layer of photoresist on the surface of the wafer. The manufacturing system performs a patterning on the deposited layer to form one or more blocks of cured photoresists. The manufacturing system performs a thermal curing of the one or more blocks of uncured photoresists to form an array of microlens of the light field sensor. Each microlens covers at least one of the plurality of pixels of the light field sensor formed on the wafer.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: July 14, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Xinqiao Liu, Yijing Fu
  • Patent number: 10705341
    Abstract: A waveguide display includes a source assembly, an output waveguide, and a controller. The source assembly includes a light source and an optics system. The light source includes source elements arranged in a 1D or 2D array that emit image light that is temporally incoherent and spatially coherent. In some embodiments, the light source includes an array of superluminous LEDs, an array of laser diodes, an array of resonant cavity LEDs, or some combination thereof. The optics system includes a scanning assembly that scans the image light to particular locations based on scanning instructions. The output waveguide receives the scanned image light from the scanning assembly and outputs an expanded image light. The controller generates the scanning instructions and provides the scanning instructions to the light source.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: July 7, 2020
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventors: Maxwell Parsons, Wanli Chi, Yijing Fu, Hee Yoon Lee, James Ronald Bonar, Pasi Saarikko, Scott Charles McEldowney
  • Patent number: 10690919
    Abstract: A waveguide display includes a light source, a scanning mirror assembly, an output waveguide, and a controller. The light source emits image light. The scanning mirror assembly scans the image light as scanned image light to particular locations in accordance with scanning instructions. The output waveguide includes an input area and an output area. The output waveguide receives the scanned image light emitted from the scanning mirror assembly at the input area, and output expanded image light from a portion of the output area, the location of the portion of the output area based in part on a direction of the scanned image light output from the scanning mirror assembly. The controller generates the scanning instructions and provides the scanning instructions to the scanning mirror assembly.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: June 23, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Yijing Fu, Wanli Chi, Pasi Saarikko, Xinqiao Liu, Hee Yoon Lee, Maxwell Parsons
  • Patent number: 10598941
    Abstract: A head-mounted display (HMD) presented herein comprises an electronic display, an optical assembly with a dynamic optical axis component (DOAC), an eye tracker and a controller. The electronic display is configured to emit image light. The eye tracker is configured to determine a gaze vector of a user wearing the HMD. The DOAC is positioned in front of the electronic display and refracts the image light received from the electronic display. The controller provides emission instructions to the DOAC to dynamically move an optical axis of the DOAC to align the optical axis with the determined gaze vector. The optical assembly directs the image light refracted by the DOAC to an eye box of the HMD corresponding to a location of an eye of the user. An optical error associated with the refracted image light directed to the eye box is reduced.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: March 24, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Wanli Chi, Pasi Saarikko, Lu Lu, Kevin James MacKenzie, Yijing Fu
  • Publication number: 20200058266
    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: Application
    Filed: August 14, 2018
    Publication date: February 20, 2020
    Inventors: Yijing Fu, Pasi Saarikko, Hee Yoon Lee, Wanli Chi
  • Publication number: 20200018962
    Abstract: A lens assembly includes two or more polarization-dependent lenses sensitive to either linear or circular polarization, and at least one switchable polarization converter. The switchable polarization converter is configured to rotate linearly polarized light or change the handedness of circularly polarized light when switched on. The lens assembly is configurable to project displayed images on two or more different image planes. For example, when the switchable polarization converter is switched off, the lens assembly projects a displayed image on a first image plane. When the switchable polarization converter is switched on, the lens assembly projects a displayed image on a second image plane different from the first image plane.
    Type: Application
    Filed: July 11, 2018
    Publication date: January 16, 2020
    Inventors: Lu Lu, Yijing Fu, Oleg Yaroshchuk, Kevin James MacKenzie, Mengfei Wang, Alireza Moheghi, John Cooke, Andrew John Ouderkirk
  • Patent number: 10534209
    Abstract: A near-eye display (NED) includes a source assembly that emits image light, a waveguide-based display assembly, and a controller coupled to the waveguide-based display assembly, and an optical assembly. The waveguide-based display assembly includes a liquid crystal (LC) waveguide, an input area, and an output area. The LC waveguide comprising a first glass layer, a second glass layer, and a LC layer between the first and second glass layers. The LC waveguide propagates the image light in-coupled via the input area in accordance with emission instructions toward the output area that out-couples the image light to a user's eye. The controller generates the emission instructions and provides the emission instructions to the LC waveguide for generating the image light of substantially uniform brightness.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: January 14, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Yijing Fu, Lu Lu, Pasi Saarikko
  • Patent number: 10534156
    Abstract: A head-mounted display device includes a first light element configured to transmit a first light having a first color; a second light element configured to transmit a second light having a second color; a first lens configured for directing the first light in a first direction and directing the second light in a second direction; and a first set of one or more lenses configured for directing the first light and the second light from the first lens toward a first eye of a user. Also disclosed is a method that includes transmitting a first light and a second light through a first lens and a first set of one or more lenses and directing the first light and the second light toward a first eye of a user. Further disclosed is a method for adjusting a position of one or more lenses.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: January 14, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Yijing Fu, Brian Wheelwright, Jacques Gollier, Ying Geng
  • Patent number: 10373936
    Abstract: A head-mounted display (HMD) presents viewable media to a user. The HMD includes a light source and an optical block. The light source includes a first sub-pixel mounted on a first set of microbumps at a first height from a substrate and emits light within a first optical band, and a second sub-pixel mounted on a second set of microbumps at a second height from the substrate that is different from the first height, and emits light over a second optical band that is different than the first optical band. The optical block receives the image light from the light source, and directs the image light to an eyebox, wherein the first height and the second height mitigates longitudinal chromatic aberration and field curvature in the optical block.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: August 6, 2019
    Assignee: Facebook Technologies, LLC
    Inventors: Yijing Fu, Wanli Chi, Patrick Joseph Hughes
  • Publication number: 20190227322
    Abstract: A light projection system includes a light source configured to emit image light and an optical assembly configured to provide positive optical power to the image light and optically correct the image light. The optical assembly comprises a plurality of optical elements configured to correct differential distortion related to the image light across a field of view (FOV) within a threshold amount. The differential distortion is corrected based in part on asymmetry of the plurality of optical elements relative to an optical axis shared by the plurality of optical elements.
    Type: Application
    Filed: January 8, 2019
    Publication date: July 25, 2019
    Inventors: Michael Patrick Schaub, Byron Taylor, Yijing Fu
  • Patent number: 10359627
    Abstract: An apparatus for use in replicating an image associated with an input-pupil to an output-pupil includes a planar optical waveguide including a bulk-substrate, and also including an input-coupler, an intermediate-component and an output-coupler. The input-coupler couples light corresponding to the image into the bulk-substrate and towards the intermediate-component. The intermediate-component performs horizontal or vertical pupil expansion and directs the light corresponding to the image towards the output-coupler. The output-coupler performs the other one of horizontal or vertical pupil expansion and couples light corresponding to the image, which travels from the input-coupler to the output-coupler, out of the waveguide. The apparatus further includes an adjacent planar optical component to provide a more uniform intensity distribution compared to if the adjacent planar optical component were absent.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: July 23, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: R. Andrew Wall, Scott Woltman, Steven John Robbins, Xinye Lou, Gangok Lee, Yarn Chee Poon, Tuomas Vallius, Pasi Kostamo, Tapani Levola, Yijing Fu