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公开(公告)号：US11796881B2
公开(公告)日：2023-10-24
申请号：US18157060
申请日：2023-01-19
Applicant: Meta Platforms Technologies, LLC
Inventor： Yuge Huang , Nicholas John Diorio, Jr. , Lu Lu
IPC: G02F1/137 , C09K19/02 , G02F1/1333 , G02F1/1335 , G02F1/1337 , G02F1/139 , G02B27/00 , C09K19/58 , C09K19/54
CPC classification number: G02F1/13775 , C09K19/0275 , C09K19/542 , C09K19/586 , G02B27/0093 , G02F1/1337 , G02F1/1398 , G02F1/13793 , G02F1/133365 , G02F1/133526 , C09K2019/546
Abstract: A device includes a polymer stabilized blue phase liquid crystal (“PS-BPLC”) layer. The device also includes an alignment structure coupled with the PS-BPLC layer. LC molecules disposed in contact with the alignment structure are configured to have a spatially varying in-plane orientation pattern that is at least partially defined by the alignment structure. The PS-BPLC layer is configured to forwardly deflect a polarized light having a predetermined handedness, and transmit a polarized light having a handedness that is orthogonal to the predetermined handedness.
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公开(公告)号：US20230251489A1
公开(公告)日：2023-08-10
申请号：US18129620
申请日：2023-03-31
Applicant: Meta Platforms Technologies, LLC
Inventor： Yang Zhao , Afsoon Jamali , Junren Wang , Wai Sze Tiffany Lam , Lu Lu , Douglas Robert Lanman
CPC classification number: G02B27/0172 , G02F1/13718 , G03B13/36
Abstract: A display system includes a source of unpolarized image light, and a stack of polarization-selective optical elements operable to switchably convert the unpolarized image light into two orthogonally polarized light beams, each of which being switchable in at least one beam characteristic. An output polarizer selects one of the two orthogonally polarized light beams for providing to a user. A depolarizer may be disposed between an electronic display emitting polarized light and the stack. The depolarizer may be in the form of an LC bilayer with randomized in-plane optic axis.
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公开(公告)号：US11709411B2
公开(公告)日：2023-07-25
申请号：US17378467
申请日：2021-07-16
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Fenglin Peng , Ying Geng , Jacques Gollier , Giuseppe Calafiore , Alexander Koshelev , Mengfei Wang , Lu Lu
IPC: G02F1/29 , G02B27/01 , G02F1/13 , G02F1/1347 , G06F3/01
CPC classification number: G02F1/292 , G02B27/0172 , G02B27/0179 , G02F1/1323 , G02F1/13473 , G02B2027/0178 , G02B2027/0187 , G06F3/013
Abstract: A display device includes a directional illuminator providing a light beam, a display panel downstream of a directional illuminator, for receiving and spatially modulating the light beam, and a beam redirecting module downstream of the display panel, for variably redirecting the spatially modulated light beam. Steering the illuminating light by the beam redirecting module enables one to steer the exit pupil of the display device to match the user's eye location(s).
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公开(公告)号：US11579451B1
公开(公告)日：2023-02-14
申请号：US17070678
申请日：2020-10-14
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Wai Sze Tiffany Lam , Yusufu Njoni Bamaxam Sulai , Robin Sharma , Ying Geng , Lu Lu , Jacques Gollier
Abstract: A head-mounted device (HMD) contains a display, an optics block, a redirection structure, and an eye tracking system. The display is configured to emit image light and provide it to an eye of a user. The optics block is configured to direct the emitted light in order to allow it to reach the eye. The eye tracking system contains a camera, an illumination source, and a controller. The camera is configured to capture image data using infrared light reflected from the eye. The controller is configured to use this image data to determine eye tracking information. The illumination source is configured to illuminate the eye with infrared light for the purpose of taking eye tracking measurements. The redirection structure is configured to direct infrared light reflected from the eye to the eye tracking system. In multiple embodiments, redirection structures may comprise prism arrays, lenses, liquid crystal layers, or grating structures.
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公开(公告)号：US11573357B2
公开(公告)日：2023-02-07
申请号：US17093609
申请日：2020-11-09
Applicant: Meta Platforms Technologies, LLC
Inventor： Fenglin Peng , Junren Wang , Yuge Huang , Lu Lu , Yusufu Njoni Bamaxam Sulai , Ying Geng , Jacques Gollier , Barry David Silverstein
IPC: G02F1/1335 , G02B5/30 , G02B5/08 , G02B7/02
Abstract: A device includes a light source configured to generate an image light. The device also includes a lens assembly coupled with the light source. The lens assembly includes a mirror configured to transmit a first portion of the image light and reflect a second portion of the image light. The lens assembly also includes a reflective polarizer including a birefringent medium with a chirality and configured to substantially reflect the first portion of the image light output from the mirror as a polarized light having a predetermined handedness toward the mirror. The lens assembly further includes a lens disposed between the mirror and the reflective polarizer and configured to provide an optical power to the image light.
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Patent Agency Ranking
公开(公告)号：US11567332B2
公开(公告)日：2023-01-31
申请号：US17706581
申请日：2022-03-28
Applicant: Meta Platforms Technologies, LLC
Inventor： Scott Charles Mceldowney , Babak Amirsolaimani , Yun-Han Lee , Lu Lu , Mengfei Wang , Junren Wang
Abstract: A device includes a light guide. The device also includes a first in-coupling element configured to couple a first input light into the light guide, and a first out-coupling element configured to couple the first input light out of the light guide as a first output light having a first output field of view (“FOV”). The device also includes a second in-coupling element configured to couple a second input light into the light guide. The device further includes a second out-coupling element configured to couple the second input light out of the light guide as a second output light having a second output FOV substantially non-overlapping with the first output FOV. A combination of the first and second output FOVs is larger than at least one of the first or second output FOV, and the first and second input lights have orthogonal polarizations.
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公开(公告)号：US20250164682A1
公开(公告)日：2025-05-22
申请号：US18409194
申请日：2024-01-10
Applicant: Meta Platforms Technologies, LLC
Inventor： Ali Altaqui , Xiayu Feng , Jihwan Kim , Sihui He , Yun-Han Lee , Steven John Robbins , Michael Escuti , Lu Lu
Abstract: The disclosed device may include a waveguide; an output coupler that couples electromagnetic radiation from within the waveguide to outside of the waveguide; and a reflector positioned on an opposite side of the waveguide from the output coupler, where the reflector reflects electromagnetic radiation that leaks from the waveguide through the opposite side of the waveguide back toward the output coupler. Various other devices, systems, and methods are also disclosed.
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公开(公告)号：US12287484B2
公开(公告)日：2025-04-29
申请号：US18129620
申请日：2023-03-31
Applicant: Meta Platforms Technologies, LLC
Inventor： Yang Zhao , Afsoon Jamali , Junren Wang , Wai Sze Tiffany Lam , Lu Lu , Douglas Robert Lanman
Abstract: A display system includes a source of unpolarized image light, and a stack of polarization-selective optical elements operable to switchably convert the unpolarized image light into two orthogonally polarized light beams, each of which being switchable in at least one beam characteristic. An output polarizer selects one of the two orthogonally polarized light beams for providing to a user. A depolarizer may be disposed between an electronic display emitting polarized light and the stack. The depolarizer may be in the form of an LC bilayer with randomized in-plane optic axis.
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公开(公告)号：US12259616B1
公开(公告)日：2025-03-25
申请号：US18498001
申请日：2023-10-30
Applicant: Meta Platforms Technologies, LLC
Inventor： Nicholas John Diorio, Jr. , Mengfei Wang , Yuge Huang , Kai-Han Chang , Lu Lu , Xiayu Feng
IPC: G02F1/13363 , G02F1/1335 , G02F1/1337 , G02F1/1343
Abstract: A device includes a plurality of electrode layers. The device also includes a birefringent medium layer disposed between the plurality of electrode layers. The device also includes at least one alignment structure disposed at a surface of the birefringent medium layer. The birefringent medium layer includes liquid crystal molecules arranged in a plurality of helical twist structures having a helical axis. The plurality of electrode layers are configured to generate an electric field within the birefringent medium layer, and the liquid crystal molecules are aligned via the electric field to be titled with respect to the helical axis.
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公开(公告)号：US12078806B2
公开(公告)日：2024-09-03
申请号：US17712894
申请日：2022-04-04
Applicant: Meta Platforms Technologies, LLC
Inventor： Wai Sze Tiffany Lam , Lu Lu
IPC: G02F1/29 , G02B5/30 , G02B27/00 , G02B27/01 , G02B27/28 , G02B27/42 , G02F1/1335 , G02F1/13363 , G02F1/139 , G02F1/1347
CPC classification number: G02B27/0172 , G02B5/3016 , G02B27/0025 , G02B27/286 , G02B27/288 , G02B27/4261 , G02F1/133504 , G02F1/133526 , G02F1/133528 , G02F1/13363 , G02F1/1393 , G02F1/292 , G02B2027/011 , G02B2027/0116 , G02B2027/0174 , G02F1/133541 , G02F1/133638 , G02F1/1347 , G02F1/294 , G02F2203/05 , G02F2203/24 , G02F2413/02
Abstract: A near eye display (NED) includes multiple PBP optical elements combined with one or more C-plates to improve optical angular performance. The PBP optical elements may be configured for beam steering or for focusing light to a point. A C-plate may reduce or eliminate an undesirable polarization phase shift introduced by the PBP optical elements to angular, off-axis light. Birefringence of the PBP optical elements produces such a polarization phase shift. A C-plate provides an additional polarization phase shift that is opposite to the extra polarization phase shift by the PBP optical elements. Thus, the additional polarization phase shift by the C-plate at least partially reduces the phase shift by the PBP element.
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