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公开(公告)号：US20240231093A1
公开(公告)日：2024-07-11
申请号：US18094807
申请日：2023-01-09
Applicant: Meta Platforms Technologies, LLC
Inventor： Robin Sharma , Miaomiao Xu , Andrew Maimone , Scott Charles McEldowney
CPC classification number: G02B27/0172 , G02B6/0016 , G02B6/0036 , G02B6/005 , G02B2027/0174
Abstract: A light field display is composed of a light source assembly (LSA), a collimating lens, an incoupling section, a spatial light modulator (SLM), and gratings. The LSA includes point light sources that emit light at different time periods. The collimating lens collimates light from the point light sources. The incoupling section incouples the collimated light to a waveguide. The SLM spatially modulates the collimated light. The gratings outcouple spatially modulated light from the waveguide, and for any given point light source of the point light sources, the given point light source has a respective corresponding grating of the gratings that outcouples from the waveguide light that originated from the given point light source. The spatially modulated light output in each time period forms a respective virtual emitter in an eyebox, and over the different time periods the virtual emitters in aggregate form at least one virtual object.
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公开(公告)号：US20230176376A1
公开(公告)日：2023-06-08
申请号：US17581303
申请日：2022-01-21
Applicant: Meta Platforms Technologies, LLC
CPC classification number: G02B27/0172 , G02B6/0016 , G02B6/0038 , G02B2027/0174 , G02B2027/0112
Abstract: A lightguide for conveying image light to an eyebox of a display device includes a tunable grating, e.g. an out-coupling grating for out-coupling the image light from the lightguide. The tunable grating may be tuned or switched to effectively diffract light of a color channel of a color-sequential display. In augmented reality display systems, a lightguide combiner element may include a switchable grating to out-couple the image light only during short time intervals and to not out-couple the image light in between these time intervals. Effectively, the out-coupling grating is present only a portion of overall operation time of the display, which improves the transparency of the combiner element to the outside light and reduces rainbow effects.
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公开(公告)号：US20240069345A1
公开(公告)日：2024-02-29
申请号：US17823230
申请日：2022-08-30
Applicant: Meta Platforms Technologies, LLC
Inventor： Andrew Maimone , Ryan Michael Ebert , Nathaniel David Ginzton , Bruce A. Cleary, III
CPC classification number: G02B27/0172 , G02B6/0016 , G02B6/0018 , G02B2027/0178
Abstract: Techniques are described for backlighting electronic headset display panels. The backlight can include a light guide plate that is illuminated via a light transmitting element that is coupled to a light source. The light guide plate, in turn, illuminates the display panel. The light source is located within the headset but is disposed remotely from the display panels. A photodiode is coupled to a surface of the light transmitting element and is configured to detect a characteristic of the light transmitted by the light transmitting element.
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公开(公告)号：US11774753B1
公开(公告)日：2023-10-03
申请号：US17531301
申请日：2021-11-19
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Giuseppe Calafiore , Ningfeng Huang , Andrew Maimone , Andrew Ouderkirk , Hee Yoon Lee , Maxwell Parsons , Scott Charles McEldowney , Babak Amirsolaimani , Pasi Saarikko , Wanli Chi , Alexander Koshelev , Barry David Silverstein , Lu Lu , Wai Sze Tiffany Lam , Gang Li , Stephan Lutgen , Francois Gerard Franck Olivier , David Massoubre
CPC classification number: G02B27/0081 , G02B27/0172 , G02B27/0944 , G02B27/1086 , G02B27/44 , G02B2027/0145 , G02B2027/0152
Abstract: A waveguide assembly is provided. The waveguide assembly includes a pair of pupil-replicating waveguides. The first pupil-replicating waveguide is configured for receiving an input beam of image light and providing an intermediate beam comprising multiple offset portions of the input beam. The second pupil-replicating waveguide is configured for receiving the intermediate beam from the first pupil-replicating waveguide and providing an output beam comprising multiple offset portions of the intermediate beam. The input beam may be expanded by the waveguide assembly in such a manner that pupil gaps are reduced or eliminated.
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公开(公告)号：US12147046B2
公开(公告)日：2024-11-19
申请号：US17894052
申请日：2022-08-23
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Andrew Maimone , Junren Wang , Barry David Silverstein
IPC: G02B27/01 , G02B5/18 , G02B5/32 , G02B17/00 , G02B27/00 , G02B27/02 , G02B27/10 , G02B27/14 , G02B27/28 , G02B27/48
Abstract: An optical device for a head-mounted display device includes a first partial reflector and a second partial reflector positioned relative to the first partial reflector so that the second partial reflector receives first light transmitted through the first partial reflector and reflects at least a portion of the first light toward the first partial reflector as second light. At least a portion of the second light is reflected by the first partial reflector as third light, and at least a portion of the third light is transmitted through the second partial reflector. At least one of the first partial reflector or the second partial reflector includes a reflective holographic element.
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Patent Agency Ranking
公开(公告)号：US20240069344A1
公开(公告)日：2024-02-29
申请号：US17823214
申请日：2022-08-30
Applicant: Meta Platforms Technologies, LLC
Inventor： Bruce A Cleary, III , Andrew Maimone
CPC classification number: G02B27/0172 , G02B6/0016 , G02B6/0018 , G02B2027/0178
Abstract: Techniques are described for backlighting electronic headset display panels. The method can include emitting light from a light source. The light can be transmitted from the light source via a light transmitting element to illuminate a light guide plate that is located remotely from the light source. The light guide plate can illuminate a display panel that is located remotely from the light source. A photodiode can detect a characteristic of the light that is transmitted by the light transmitting element at a location proximate the display panel and remote from the light source. One or more processors can determine a power level of the light source that is based at least in part on the characteristic detected by the photodiode.
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公开(公告)号：US20230176367A1
公开(公告)日：2023-06-08
申请号：US17581588
申请日：2022-01-21
Applicant: Meta Platforms Technologies, LLC
CPC classification number: G02B27/0081 , G02B6/0035 , G02B27/0172 , G02B2027/0174
Abstract: A lightguide for conveying image light to an eyebox of a display device includes a tunable grating, e.g. an out-coupling grating for out-coupling the image light from the lightguide. The tunable grating may be tuned or switched to effectively diffract light of a color channel of a color-sequential display. In augmented reality display systems, a lightguide combiner element may include a switchable grating to out-couple the image light only during short time intervals and to not out-couple the image light in between these time intervals. Effectively, the out-coupling grating is present only a portion of overall operation time of the display, which improves the transparency of the combiner element to the outside light and reduces rainbow effects.
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公开(公告)号：US11592681B2
公开(公告)日：2023-02-28
申请号：US17029963
申请日：2020-09-23
Applicant: Meta Platforms Technologies, LLC
Inventor： Oleg Yaroshchuk , Giuseppe Calafiore , Alireza Moheghi , Andrew Maimone , Barry David Silverstein
Abstract: A device includes a waveguide, an in-coupling element, and an out-coupling element coupled with the waveguide. The waveguide, the in-coupling element, and the out-coupling element are configured to deliver a plurality of portions of an image light to an eye-box of the device. At least one of the in-coupling element or the out-coupling element includes a polarization selective diffractive element. The polarization selective diffractive element includes a grating including a plurality of microstructures defining a plurality of grooves filled with a passive optically anisotropic material having a first effective refractive index along a groove direction of the grooves and a second effective refractive index along an in-plane direction perpendicular to the groove direction. One of the first effective refractive index or the second effective refractive index substantially matches with a refractive index of the microstructures.
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公开(公告)号：US11428938B2
公开(公告)日：2022-08-30
申请号：US16726130
申请日：2019-12-23
Applicant: Meta Platforms Technologies, LLC
Inventor： Oleg Yaroshchuk , Giuseppe Calafiore , Alireza Moheghi , Andrew Maimone , Barry David Silverstein
Abstract: An optical device includes a light source assembly configured to generate an image light; and at least one waveguide including an in-coupling element and an out-coupling element configured to transmit, via the at least one waveguide, a plurality of light fields of the image light to an eye-box of the optical device, in a time-multiplexing manner. At least one of the in-coupling element or the out-coupling element includes at least one switchable diffractive optical grating, which includes a surface relief grating (SRG) filled with an optically anisotropic material having a first principal refractive index along a groove direction of the SRG and a second principal refractive index along an in-plane direction perpendicular to the groove direction. One of the first and second refractive principal refractive indices substantially matches a refractive index of the SRG, and the other mismatches.
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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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