Patents by Inventor Wanli Chi
Wanli Chi 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).
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Publication number: 20230244185Abstract: According to examples, a method for phase plate fabrication may be described herein. The method may include providing an interferometer configuration to generate a hologram of a plurality of pinholes. In some examples, the interferometer configuration includes a substrate for photopolymer attachment, a photopolymer having a predetermined thickness, and an exposure mask with a plurality of pinholes. The method may also include exposing the photopolymer with collimated light, via a laser source, through the exposure mask with a plurality of pinholes, wherein the collimated light passes through the exposure mask itself to create a collimated beam, and the plurality of pinholes of the exposure mask to create a spherical wavefront. The collimated beam and the spherical wavefront may help generate the hologram on the photopolymer for use as a phase plate for improved light transmissivity in display systems.Type: ApplicationFiled: January 24, 2023Publication date: August 3, 2023Applicant: Meta Platforms Technologies, LLCInventors: Wai Sze Tiffany LAM, Jian XU, Ying GENG, Wanli CHI
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Patent number: 11714282Abstract: A light source includes a first set of source elements and a second set of source elements. A respective set of source elements is disposed on a respective substrate and electrically coupled to a respective set of circuit pads formed on a respective top surface of the respective substrate by respective bond wires. At least a portion of the respective top surfaces face each other and are spaced apart from each other to accommodate at least some of the first set of source elements, at least some of the second set of source elements, and at least some of the bond wires. The display device that includes a light source configured to output image light, an optical assembly configured to collimate the image light, a scanning assembly configured to steer the image light, and an output device configured to output the image light for displaying images is also disclosed.Type: GrantFiled: July 9, 2019Date of Patent: August 1, 2023Assignee: META PLATFORMS TECHNOLOGIES, LLCInventors: Wanli Chi, Chadwick Brian Martin, Scott Charles McEldowney, Maxwell Parsons, Stephen James McNally, Daniel Guenther Greif
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Publication number: 20230236415Abstract: According to examples, a system for image generation and delivery in a display device using two-dimensional (2D) field of view (FOV) expander is described. In addition, the system may include a first lens a first lens assembly having a first projector to propagate first display light associated with a first image and a first two-dimensional (2D) expander including a first waveguide for propagating the first display light to a first eye of a user and a second lens assembly having a second projector to propagate second display light associated with a second image and a second two-dimensional (2D) expander having a second waveguide for propagating the second display light to a first eye of a user.Type: ApplicationFiled: January 26, 2022Publication date: July 27, 2023Applicant: Meta Platforms Technologies, LLCInventors: Yang YANG, Wai Sze Tiffany LAM, Dominic MEISER, Wanli CHI
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Patent number: 11709358Abstract: A waveguide display includes a waveguide and a staircase structure coupled to the waveguide. The waveguide includes a first substrate, a second substrate, and a holographic material layer between the first substrate and the second substrate. The holographic material layer includes a first grating and a second grating. The staircase structure is positioned on top of at least a portion of the first grating but not on top of the second grating. The staircase structure includes an input grating that is on top of the first grating and is configured to couple display light into the waveguide. The first grating is configured to redirect the display light coupled into the waveguide by the input grating towards the second grating.Type: GrantFiled: February 24, 2021Date of Patent: July 25, 2023Assignee: META PLATFORMS TECHNOLOGIES, LLCInventors: Yang Yang, Wanli Chi, Wai Sze Tiffany Lam, Dominic Meiser
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Publication number: 20230213761Abstract: According to examples, a display system may include a wearable eyewear arrangement that may include a lens assembly having a projector to propagate display light associated with an image. The lens assembly may also include a waveguide for propagating the display light to an eyebox, in which the waveguide may include a plurality of gratings through which the first display light is sequentially propagated and in which at least one of the plurality of gratings is oriented to propagate the display light to a next grating while reducing an appearance of a ghost image of the image on the eyebox.Type: ApplicationFiled: January 5, 2022Publication date: July 6, 2023Applicant: Meta Platforms Technologies, LLCInventors: Wai Sze Tiffany LAM, Yang Yang, Dominic Meiser, Wanli Chi
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Publication number: 20230213772Abstract: According to examples, a display system may include a disparity sensing detector, collection optics, and a first lens assembly. The first lens assembly may include a first projector to output a first display light associated with a first image and a first waveguide for propagating the first display light to the collection optics, in which the collection optics is to direct the first display light to the disparity sensing detector. The display system may also include a second lens assembly including a second projector to output a second display light associated with a second image and a second waveguide for propagating the second display light to the collection optics, in which the collection optics is to direct the second display light to the disparity sensing detector.Type: ApplicationFiled: March 13, 2023Publication date: July 6, 2023Applicant: Meta Platforms Technologies, LLCInventors: Wai Sze Tiffany Lam, Yang Yang, Dominic Meiser, Wanli Chi
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Publication number: 20230209032Abstract: According to examples, a system for detection, analysis and correction of disparities in display systems utilizing one or more disparity sensing port is described. The system may include a processor and a memory storing instructions. In addition, the system may include a first lens including a first waveguide for displaying a first image and a second lens including a second waveguide for displaying a second image. Furthermore, the system may include a first projector associated with the first lens to propagate first display light associated with the first image, a second projector associated with the second lens to propagate second display light associated with the second image and a disparity sensing port to receive the first display light and the second display light to determine a disparity associated with the first image and the second image.Type: ApplicationFiled: December 23, 2021Publication date: June 29, 2023Applicant: Meta Platforms Technologies, LLCInventors: Yang YANG, Wai Sze Tiffany LAM, Dominic MEISER, Wanli CHI
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Publication number: 20230194925Abstract: Embodiments of the present disclosure relate to a high performance backlight device with photonic integrated circuits. The backlight device includes a light source assembly, a multi-mode slab waveguide, and an out-coupling assembly. The light source assembly includes one or more light sources that generate light in accordance with emission instructions, and a de-speckling mechanism that conditions the generated light to mitigate speckle. The multi-mode slab waveguide in-couples the conditioned light and expands the in-coupled conditioned light in two dimensions to form a homogenous area of conditioned light within a region of the multi-mode slab waveguide. The out-coupling assembly out-couples the conditioned light from the region in a direction normal to the two dimensions, wherein a light modulation layer forms an image from the out-coupled conditioned light.Type: ApplicationFiled: November 10, 2022Publication date: June 22, 2023Inventors: Zhimin Shi, James Ronald Bonar, Wanli Chi
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Publication number: 20230176380Abstract: A pupil-replicating lightguide includes a slab of transparent material for guiding image light in the slab, and an out-coupling structure supported by the slab for out-coupling portions of the image light from the slab. The portions are laterally offset from one another along a path of the image light in the slab. The out-coupling grating structure has a switchable distribution of out-coupling efficiency for redirecting the portions of out-coupled light to a desired location such as a current location of an eye of the viewer determined by an eye tracking system. The out-coupling grating structure may include a plurality of diffraction gratings having different local slant angles of grating fringes.Type: ApplicationFiled: March 18, 2022Publication date: June 8, 2023Inventors: Sihui He, Jacques Gollier, Maxwell Parsons, Babak Amirsolaimani, Wanli Chi, Daniel Guenther Greif, Renate Eva Klementine Landig, Xiayu Feng, Zhimin Shi, Nicholas John Diorio, Yang Yang, Giuseppe Calafiore, Fenglin Peng, Tanya Malhotra, Andrew John Ouderkirk
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Publication number: 20230176368Abstract: A field of view of an imaging or ranging device may be increased multiple times by providing a switchable diffraction grating structure upstream of an imaging camera or ranging light source. The switchable diffraction grating changes the angle of propagating of incoming light by a fixed step, enabling the device to switch between several portions of a compound field of view. The switchable diffraction grating structure may be supported by a lightguide that guides the image light or ranging light by a series of reflections from opposed surfaces of the lightguide.Type: ApplicationFiled: March 22, 2022Publication date: June 8, 2023Inventors: Sihui He, Maxwell Parsons, Babak Amirsolaimani, Wanli Chi, Daniel Guenther Greif, Renate Eva Klementine Landig, Xiayu Feng, Zhimin Shi, Nicholas John Diorio, Yang Yang, Giuseppe Calafiore, Fenglin Peng, Tanya Malhotra, Andrew John Ouderkirk
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Publication number: 20230176274Abstract: An illuminator for a display panel includes a slab of transparent material for propagating illuminating light between outer surfaces of the slab, an out-coupler supported by the slab for out-coupling portions of the illuminating light along one of the outer surfaces of the slab, and a tunable microlens array for forming an array of light spots from the out-coupled illuminating light portions downstream of the focusing element for illuminating pixels of the display panel. The array of light spots may be repeated at a distance from the tunable microlens array due to Talbot effect. The display panel may be illuminated in a color-sequential manner, and the tunable microlens array may be used to adjust the focal plane position for each color channel individually.Type: ApplicationFiled: March 18, 2022Publication date: June 8, 2023Inventors: Sihui He, Jacques Gollier, Maxwell Parsons, Babak Amirsolaimani, Wanli Chi, Daniel Guenther Greif, Renate Eva Klementine Landig, Xiayu Feng, Zhimin Shi, Nicholas John Diorio, Yang Yang, Giuseppe Calafiore, Fenglin Peng, Tanya Malhotra, Andrew John Ouderkirk
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Publication number: 20230176370Abstract: A pupil-replicating lightguide includes a slab of transparent material, a switchable out-coupling grating for out-coupling portions of image light to propagate towards an eyebox, and a switchable tracking grating for redirecting tracking light carrying an eye image towards an eye tracking camera. One of the two gratings may be turned ON while the other is turned OFF, in a time-sequential manner, allowing the combined use of the pupil-replicating lightguide for carrying image light and eye tracking light.Type: ApplicationFiled: March 17, 2022Publication date: June 8, 2023Inventors: Sihui He, Jacques Gollier, Maxwell Parsons, Babak Amirsolaimani, Wanli Chi, Daniel Guenther Greif, Renate Eva Klementine Landig, Xiayu Feng, Zhimin Shi, Nicholas John Diorio, Yang Yang, Giuseppe Calafiore, Fenglin Peng, Tanya Malhotra, Andrew John Ouderkirk
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Publication number: 20230176444Abstract: A switchable grating may be used to redirect illuminating light for illuminating a user’s eye in an eye tracking system, to facilitate the determination of eye position and/or orientation. The eye tracking system may be used in a near-eye display. An eye tracking camera obtains an eye image, and a controller performs an initial determination of the eye position. The controller may switch the switchable grating to direct the illuminating light beam onto the eye, for a better position and/or eye orientation determination.Type: ApplicationFiled: March 17, 2022Publication date: June 8, 2023Inventors: Sihui He, Jacques Gollier, Maxwell Parsons, Babak Amirsolaimani, Wanli Chi, Daniel Guenther Greif, Renate Eva Klementine Landig, Xiayu Feng, Zhimin Shi, Nicholas John Diorio, Yang Yang, Giuseppe Calafiore, Fenglin Peng, Tanya Malhotra, Andrew John Ouderkirk
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Patent number: 11624917Abstract: A waveguide display includes a waveguide and a grating coupler configured to couple display light into or out of the waveguide. The grating coupler includes at least a first grating layer and a second grating layer arranged in a stack. The first grating layer is characterized by a first thickness and includes a first transmission VBG configured to diffract display light of a first wavelength from a first field of view. The second grating layer is characterized by a second thickness greater than the first thickness and includes a second transmission VBG configured to diffract display light of the first wavelength from a second field of view greater than the first field of view.Type: GrantFiled: April 3, 2020Date of Patent: April 11, 2023Assignee: META PLATFORMS TECHNOLOGIES, LLCInventors: Wanli Chi, Dominic Meiser, Yang Yang, Wai Sze Tiffany Lam, Pasi Saarikko
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Patent number: 11624926Abstract: According to examples, a display system may include a disparity sensing detector, collection optics, and a first lens assembly. The first lens assembly may include a first projector to output a first display light associated with a first image and a first waveguide for propagating the first display light to the collection optics, in which the collection optics is to direct the first display light to the disparity sensing detector. The display system may also include a second lens assembly including a second projector to output a second display light associated with a second image and a second waveguide for propagating the second display light to the collection optics, in which the collection optics is to direct the second display light to the disparity sensing detector.Type: GrantFiled: January 5, 2022Date of Patent: April 11, 2023Assignee: Meta Platforms Technologies, LLCInventors: Wai Sze Tiffany Lam, Yang Yang, Dominic Meiser, Wanli Chi
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Patent number: 11609424Abstract: Techniques disclosed herein relate to a near-eye display system. One example of an eye-tracking system includes a substrate transparent to visible light and infrared light and a reflective holographic grating conformally coupled to a surface of the substrate. The reflective holographic grating is configured to transmit the visible light and reflectively diffract infrared light in a first wavelength range for eye tracking. The refractive index modulation of the reflective holographic grating is apodized in a direction along a thickness of the reflective holographic grating to reduce optical artifacts in the visible light.Type: GrantFiled: July 8, 2019Date of Patent: March 21, 2023Assignee: Meta Platforms Technologies, LLCInventors: Gregory Olegovic Andreev, Gang Li, Erik Shipton, Yingfei Jiang, Wanli Chi, Andrew John Ouderkirk
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Patent number: 11604356Abstract: A near-eye display assembly presented herein includes an electronic display, an optical assembly, and scanning assembly. The electronic display has a first resolution. The optical assembly controls a field of view at an eye box and directs a plurality of light rays emitting from the electronic display toward the eye box. The scanning assembly shifts a direction of at least one of the light rays in accordance with emission instructions such that a virtual display is presented to the eye box, the virtual display having a second resolution greater than the first resolution. The display assembly can be implemented as a component of a head-mounted display of an artificial reality system.Type: GrantFiled: August 30, 2021Date of Patent: March 14, 2023Assignee: Meta Platforms Technologies, LLCInventors: Stephen John Holmes, Wanli Chi, Maxwell Parsons, Jasmine Soria Sears
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Publication number: 20230048367Abstract: There are provided a volume Bragg grating and a method and a system for fabricating it. For instance, there is provided a system that includes a set of spatial light modulators configured to receive a light input. The light input can include a set of input paths where each input path in the set of input paths corresponds to a respective spatial light modulator from the set of spatial light modulators. The system can further include an input light processing module configured to condition an input light beam to output the light input to the set of spatial light modulators. The system can further include an optics module configured to receive a pattern originating from the set of spatial light modulators.Type: ApplicationFiled: July 29, 2022Publication date: February 16, 2023Applicant: Facebook Technologies, LLCInventors: Jian Xu, Wen Xiong, Yang Yang, Wanli Chi
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Patent number: 11450250Abstract: 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. The optics system includes a scanning mirror assembly that scans the image light to particular locations based on scanning instructions. The output waveguide receives the scanned image light from the scanning mirror assembly and outputs an expanded image light. In some embodiments, the waveguide display includes a source waveguide and the 1D array of source elements. The source waveguide receives a conditioned image light from the source assembly. The controller generates the scanning instructions and provides the scanning instructions to the scanning mirror assembly. In some embodiments, the controller provides the scanning instructions to an actuator assembly of the source waveguide.Type: GrantFiled: August 3, 2021Date of Patent: September 20, 2022Assignee: Meta Platforms Technologies, LLCInventors: Wanli Chi, Pasi Saarikko, Hee Yoon Lee
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Publication number: 20220291437Abstract: A waveguide display includes a first waveguide, a second waveguide, a spacer between the first waveguide and the second waveguide, and a light redirecting or absorbing structure on at least one surface of the first waveguide and/or at least one surface of the second waveguide. The first waveguide includes a first grating configured to couple a first portion of display light into the first waveguide and towards a second grating of the first waveguide. The second waveguide includes a third grating aligned with the first grating and configured to couple a second portion of the display light into the second waveguide and towards a fourth grating of the second waveguide. The light redirecting or absorbing structure is configured to absorb or redirect incident light from a first angular range towards an edge of the waveguide display, without altering incident light from other angular ranges.Type: ApplicationFiled: February 9, 2022Publication date: September 15, 2022Inventors: Wai Sze Tiffany LAM, Yang YANG, Wanli CHI, Dominic MEISER