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公开(公告)号：US10571699B1
公开(公告)日：2020-02-25
申请号：US15963359
申请日：2018-04-26
Applicant: Facebook Technologies, LLC
Inventor： Maxwell Parsons , Giuseppe Calafiore , Wanli Chi
Abstract: A waveguide includes an input area, a multi-layered substrate, and an output area. The multi-layered substrate includes a plurality of layers of at least a substrate and at least one partially reflective layers. The input area in-couples light in a first band into the waveguide. The one or more partially reflective layers are partially reflective to light in the first band. Each of the one or more partially reflective layers are located between respective layers of the plurality of layers of the substrate. The output area out-couples light from the waveguide. The pupil replication density of the out-coupled light is based in part on a number of the one or more partially reflective layers and respective locations of the one or more partially reflective layers in the waveguide.
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12.发明授权公开(公告)号：US10529290B1
公开(公告)日：2020-01-07
申请号：US15906918
申请日：2018-02-27
Applicant: Facebook Technologies, LLC
Inventor： Maxwell Parsons , Chloe Astrid Marie Fabien , Ningfeng Huang , Gareth Valentine , James Ronald Bonar
IPC: G09G3/34 , F21V8/00 , F21V9/08 , F21V9/40 , G02B6/10 , G02F1/01 , G09G3/32 , B82Y20/00 , G02B27/00 , G02B27/01 , G02B6/122 , G02F1/017 , H01L33/50 , G02F1/1335
Abstract: A display device includes a light source device, and a color converter optically coupled with the light source device. An array of regions of the light source device is configured to emit light of a first color. The color converter includes an array of color conversion regions including color conversion regions of a first type and of a second type. The color conversion regions of the first type are configured to convert the light of the first color into light of a second color. The color conversion regions of the second type are configured to convert the light of the first color into light of a third. A respective color conversion region of the array of color conversion regions includes a respective photonic crystal structure defining a respective two-dimensional pattern including one or more induced defects, and a color conversion matrix that includes color converting nanoparticles.
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公开(公告)号：US20190171026A1
公开(公告)日：2019-06-06
申请号：US15833676
申请日：2017-12-06
Applicant: Facebook Technologies, LLC
Inventor： Maxwell Parsons
Abstract: Disclosed is a multi-color light source device including a first light source configured to emit light of a first color, a second light source configured to emit light of a second color that is distinct from the first color, and a first geometric phase lens associated with a first focal length for the light of the first color and a second focal length, distinct from the first focal length, for the light of the second color. The first light source is located at a first distance from the first geometric phase lens, and the second light source is located at a second distance, distinct from the first distance, from the geometric phase lens. Also disclosed is a head mounted display system including the multi-color light source device, a light modulator configured for modulating light from the multi-color light source device, and one or more lenses.
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公开(公告)号：US10310272B1
公开(公告)日：2019-06-04
申请号：US16201621
申请日：2018-11-27
Applicant: Facebook Technologies, LLC
Inventor： Maxwell Parsons
Abstract: A source assembly for providing light. The source assembly comprises a source element array, and a scanning mirror assembly. The source element array includes a super luminous diode (SLED) array of SLEDs that are configured to emit light. The SLED array is on a single chip. Each SLED in the SLED array may emit light in the same color channel (e.g., green). There may be multiple SLED arrays that each are on respective chips and each are associated with a different color channel (e.g., one is red, one is blue, and one is green). The scanning mirror assembly is configured to scan light emitted from the SLED array (and/or multiple SLED arrays) to an entrance location of an output waveguide (e.g., of a waveguide display) as scanned image light.
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15.发明公开公开(公告)号：US20230176380A1
公开(公告)日：2023-06-08
申请号：US17698996
申请日：2022-03-18
Applicant: Facebook Technologies, LLC
Inventor： 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
CPC classification number: G02B27/0172 , G02B27/44 , G02B27/0179 , G02B2027/0105 , G02B2027/0174 , G02B2027/0178 , G02B2027/0187
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20230176370A1
公开(公告)日：2023-06-08
申请号：US17697592
申请日：2022-03-17
Applicant: Facebook Technologies, LLC
Inventor： 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
CPC classification number: G02B27/0093 , G02B27/0172 , G06F3/013
Abstract: 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.
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公开(公告)号：US11327314B2
公开(公告)日：2022-05-10
申请号：US16849734
申请日：2020-04-15
Applicant: Facebook Technologies, LLC
Inventor： Chloe Astrid Marie Fabien , Daniel Guenther Greif , Scott Charles McEldowney , Maxwell Parsons
Abstract: A display device including a laser-based light engine is disclosed. Optical interference effects due to the coherent nature of a laser light source are mitigated by shortening a coherence length of the laser source. The coherence length shortening is achieved by at least one of the following: providing a multiple longitudinal mode laser source, pulsing a laser source to achieve spectral broadening, or providing multi-emitter laser source(s) with emission wavelength varying from emitter to emitter.
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公开(公告)号：US11231579B1
公开(公告)日：2022-01-25
申请号：US16252442
申请日：2019-01-18
Applicant: Facebook 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
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：US11199697B2
公开(公告)日：2021-12-14
申请号：US16597309
申请日：2019-10-09
Applicant: Facebook Technologies, LLC
Inventor： Weichuan Gao , Brian Wheelwright , Maxwell Parsons , Daniel Guenther Greif , Scott Charles McEldowney
Abstract: A scanning projector for a display apparatus includes a first scanning reflector configured to steer a light beam in a first plane, a second scanning reflector configured to steer the light beam received from the first scanning reflector in a second plane, and beam relay optics configured to relay a first pupil defined at the first scanning reflector to a second pupil defined at the second scanning reflector, and to relay the second pupil to an output pupil of the scanning projector. The beam relay optics may include a concave reflector and a polarization beam splitter coupled to a scanning reflector in a triple pass configuration.
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公开(公告)号：US20210278669A1
公开(公告)日：2021-09-09
申请号：US16849734
申请日：2020-04-15
Applicant: Facebook Technologies, LLC
Inventor： Chloe Astrid Marie Fabien , Daniel Guenther Greif , Scott Charles McEldowney , Maxwell Parsons
Abstract: A display device including a laser-based light engine is disclosed. Optical interference effects due to the coherent nature of a laser light source are mitigated by shortening a coherence length of the laser source. The coherence length shortening is achieved by at least one of the following: providing a multiple longitudinal mode laser source, pulsing a laser source to achieve spectral broadening, or providing multi-emitter laser source(s) with emission wavelength varying from emitter to emitter.
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