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公开(公告)号：US20230393322A1
公开(公告)日：2023-12-07
申请号：US17834760
申请日：2022-06-07
Applicant: Meta Platforms Technologies, LLC
Inventor： Xiayu Feng , Zhexin Zhao , Xuan Wang , Hekun Huang , Gang Li , Lu Lu
CPC classification number: G02B6/0023 , G02B27/4222 , G02B6/005 , G02B5/32 , G02B27/0172
Abstract: A display apparatus includes a lightguide for conveying images to an eyebox. The lightguide includes a substrate, a diffractive optical element (DOE) configured to couple the image light into the substrate. The DOE has a spatially variable pitch configured to provide the DOE with a positive optical power. The lightguide further includes a grating out-coupler supported by the substrate for out-coupling portions of the image light from the substrate toward the eyebox.
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公开(公告)号：US11740471B2
公开(公告)日：2023-08-29
申请号：US17401160
申请日：2021-08-12
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Fenglin Peng , Ying Geng , Lu Lu , Yun-Han Lee , Alexander Koshelev , Giuseppe Calafiore , Jacques Gollier
IPC: G02F1/1335 , G02B27/01 , F21V8/00 , G02F1/13357
CPC classification number: G02B27/0172 , G02B6/005 , G02B6/0078 , G02B27/0179 , G02F1/133536 , G02F1/133553 , G02B2027/0178 , G02B2027/0187 , G02F1/133524 , G02F1/133526 , G02F1/133606 , G02F1/133621
Abstract: A display device with a transparent illuminator and an liquid crystal (LC) display panel is disclosed. The transparent illuminator includes a light source and a transparent lightguide, which may be based on a slab of transparent material with zigzag light propagation of the illuminating light in the slab and/or a transparent photonic integrated circuit with singlemode ridge waveguides for spreading the illuminating light in a plane parallel to the plane of LC display panel. The lightguide includes a plurality of grating out-couplers whose position is coordinated with positions of LC pixels for higher throughput. A reflective offset-to-angle optical element may be provided to form an image in angular domain through the LC panel and through the transparent illuminator, resulting in an overall compact and efficient display configuration.
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公开(公告)号：US11668932B2
公开(公告)日：2023-06-06
申请号：US16735425
申请日：2020-01-06
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Lu Lu , Gang Li , Seungjae Lee , Mengfei Wang
CPC classification number: G02B27/0081 , G02B5/1871 , G02B26/0833 , G02B27/0093 , G02B27/4233 , G02F1/0136
Abstract: Various embodiments set forth a foveated display system and components thereof. The foveated display system includes a peripheral display module disposed in series with a foveal display module. The peripheral display module is configured to generate low-resolution, large field of view imagery for a user's peripheral vision. The foveal display module is configured to perform foveated rendering in which high-resolution imagery is focused towards a foveal region of the user's eye gaze. The peripheral display module may include a diffuser that is disposed within a pancake lens, which is a relatively compact design. The foveal display module may include a Pancharatnam-Berry Phase grating stack that increases the steering range of a beam-steering device such that a virtual image can be steered to cover an entire field of view visible to the user's eye.
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公开(公告)号：US11656500B2
公开(公告)日：2023-05-23
申请号：US16898091
申请日：2020-06-10
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Yuge Huang , Fenglin Peng , Lu Lu , Junren Wang
IPC: G02F1/13357 , G02F1/1335 , G02B5/30
CPC classification number: G02F1/13362 , G02B5/3016 , G02F1/133526 , G02F1/133543 , G02F2201/343
Abstract: An optical device includes a light source and a polarization selective optical element. The polarization selective optical element includes a stack of a plurality of cholesteric liquid crystal layers. The plurality of cholesteric liquid crystal layers includes a first cholesteric liquid crystal layer with liquid crystal molecules arranged in a first helical configuration having a first pitch range for light of a first wavelength range and a second cholesteric liquid crystal layer with liquid crystal molecules arranged in a second helical configuration having a second pitch range for light of a second wavelength range. The second wavelength range is different from the first wavelength range.
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公开(公告)号：US11650429B2
公开(公告)日：2023-05-16
申请号：US17671348
申请日：2022-02-14
Applicant: Meta Platforms Technologies, LLC
Inventor： Junren Wang , Mengfei Wang , Yun-Han Lee , Yuge Huang , Lu Lu , Barry David Silverstein
CPC classification number: G02B27/286 , G02B5/1814 , G02B5/1833 , G02B5/3016 , G02B27/0172 , G02B27/30 , G02B2027/0123 , G02B2027/0138 , G02B2027/0178 , G02B2027/0187
Abstract: A polarization conversion device includes a geometric phase grating and an angular selective waveplate. The geometric phase grating includes a first liquid crystal layer and is configured to diffract a unpolarized or partially polarized incident light beam into a first light beam and a second light beam (e.g., in two different diffraction orders). The first light beam is characterized by a first polarization state and propagates in a first direction. The second light beam is characterized by a second polarization state and propagates in a second direction. The angular selective waveplate includes a second liquid crystal layer, and functions as a zero or full-wave plate for the first light beam incident in the first direction and a half-wave plate for the second light beam incident in the second direction.
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Patent Agency Ranking
公开(公告)号：US11635624B1
公开(公告)日：2023-04-25
申请号：US17135994
申请日：2020-12-28
Applicant: Meta Platforms Technologies, LLC
Inventor： Babak Amirsolaimani , Scott Charles McEldowney , Yun-Han Lee , Lu Lu
Abstract: A device includes a light guide and at least one in-coupling element configured to couple an image light into the light guide. The device also includes a first out-coupling element configured to couple a first portion of the image light out of the light guide as a plurality of first output lights. The device further includes a second out-coupling element spaced apart from the first out-coupling element by a distance and configured to couple a second portion the image light out of the light guide as a plurality of second output lights. The second output lights are substantially non-overlapping with the first output lights.
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公开(公告)号：US11619815B2
公开(公告)日：2023-04-04
申请号：US16733092
申请日：2020-01-02
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Gang Li , Changwon Jang , Giseung Bang , Andrew Maimone , Mengfei Wang , Afsoon Jamali , Lu Lu , Hao Yu
IPC: G02B27/01
Abstract: An optical assembly includes a beam steering device and a holographic optical element. The beam steering device is switchable between different states including a first state and a second state. The beam steering device includes a first polarization-selective optical element and a first tunable optical retarder optically coupled with the first polarization-selective optical element. The holographic optical element is positioned relative to the beam steering device for receiving light from the beam steering device and projecting a first light pattern while the beam steering device is in the first state and a second light pattern distinct from the first light pattern while the beam steering device is in the second state.
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公开(公告)号：US20230008674A1
公开(公告)日：2023-01-12
申请号：US17850898
申请日：2022-06-27
Applicant: Meta Platforms Technologies, LLC
Inventor： Qing Chao , Hao Yu , Lu Lu , Scott Charles McEldowney , Xinqiao Liu , Eric Fest
Abstract: An image sensor includes imaging pixels and a patterned liquid crystal polarizer (LCP). The imaging pixel include subpixels. The patterned LCP is disposed over the subpixels and configured to direct a particular polarized portion of imaging light to particular subpixels.
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公开(公告)号：US20220350065A1
公开(公告)日：2022-11-03
申请号：US17582580
申请日：2022-01-24
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Tingling Rao , Yuge Huang , Lafe Joseph Purvis, II , Kimberly Kay Childress , Arman Boromand , Tanya Malhotra , Andrew John Ouderkirk , Lu Lu , Poer Sung
Abstract: A multilayer organic thin film includes a plurality of biaxially-oriented layers, where each layer is characterized by mutually orthogonal refractive indices, n1≠n2≠n3. In example structures, the corresponding in-plane refractive indices of adjacent layers may be rotated with respect to each other by a predetermined angle. Such a multilayer may be incorporated into a circular reflective polarizer, for example, which may be used in display systems to provide high broadband efficiency and high off-axis contrast. In an example process, individual organic thin films may be molded, and then oriented and stacked to form a multilayer.
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公开(公告)号：US12231749B2
公开(公告)日：2025-02-18
申请号：US17865223
申请日：2022-07-14
Applicant: Meta Platforms Technologies, LLC
Inventor： Qing Chao , Lu Lu , Xinqiao Liu , Hao Yu , Junren Wang
Abstract: Imaging systems, cameras, and image sensors of this disclosure include imaging pixels that include subpixels. Diffractive optical elements such as a metasurface lens layers or a liquid crystal polarization hologram (LCPH) are configured to focus image light to the subpixels of the imaging pixels.
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