公开(公告)号：US11714320B2

公开(公告)日：2023-08-01

申请号：US17535753

申请日：2021-11-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Fenglin Peng ,  Lu Lu ,  Jacques Gollier

IPC: G02F1/1343 ,  G02F1/141 ,  G02F1/03 ,  G02F1/13363 ,  G02F1/137

CPC classification number: G02F1/134363 ,  G02F1/0311 ,  G02F1/133632 ,  G02F1/141 ,  G02F1/13775 ,  G02F1/133638

Abstract: A waveplate is provided. The waveplate includes a first liquid crystal (“LC”) layer including LC molecules that are in-plane switchable by an external field to switch the waveplate between states of different phase retardances. The waveplate includes a second LC layer and a third LC layer sandwiching the first LC layer. Azimuthal angles of effective refractive index ellipsoids of the second LC layer and the third LC layer are different.

公开(公告)号：US11709308B2

公开(公告)日：2023-07-25

申请号：US16862403

申请日：2020-04-29

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Ying Geng ,  Jacques Gollier ,  Fenglin Peng ,  Weichuan Gao

IPC: F21V8/00 ,  G02B5/30 ,  G02B6/10 ,  G02B27/00 ,  G02B27/01 ,  G02B27/14 ,  G02B27/28 ,  G02F1/13 ,  G02B6/12

CPC classification number: G02B6/0056 ,  G02B5/3025 ,  G02B6/0028 ,  G02B6/0031 ,  G02B6/105 ,  G02B27/0093 ,  G02B27/0172 ,  G02B27/145 ,  G02B27/283 ,  G02B6/0025 ,  G02B2006/12116 ,  G02B2027/0125 ,  G02B2027/0138 ,  G02B2027/0174 ,  G02B2027/0178 ,  G02F1/1326

Abstract: An optical device includes a light source configured to provide illumination light and a waveguide. The waveguide has an input surface, an output surface distinct from and non-parallel to the input surface, and an output coupler. The waveguide is configured to receive, at the input surface, the illumination light provided by the light source and propagate the illumination light via total internal reflection. The waveguide is also configured to redirect, by the output coupler, the illumination light so that the illumination light is output from the output surface for illuminating a spatial light modulator.

公开(公告)号：US20230194866A1

公开(公告)日：2023-06-22

申请号：US17553635

申请日：2021-12-16

Applicant: Meta Platforms Technologies, LLC

Inventor： Fenglin Peng ,  Jacques Gollier ,  Liangyu Qiu ,  Xingzhou Tu ,  Ying Geng

IPC: G02B27/01 ,  G02B27/09 ,  G02B26/08

CPC classification number: G02B27/0172 ,  G02B27/0961 ,  G02B26/0816 ,  G02B2027/0178 ,  G02B2027/0112

Abstract: An illuminator for a display panel includes a slab of transparent material for propagating illuminating light between outer surfaces of the slab, an out-coupling grating supported by the slab for out-coupling portions of the illuminating light along one of the outer surfaces of the slab, and an amplitude and/or phase mask 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 mask due to Talbot effect. A beam redirecting element such as a tiltable reflector and/or a steering surface may be provided to shift the lateral location of the illuminating light spots.

公开(公告)号：US11675206B1

公开(公告)日：2023-06-13

申请号：US17828990

申请日：2022-05-31

Applicant: Meta Platforms Technologies, LLC

Inventor： Jacques Gollier ,  Ying Geng ,  Yusufu Njoni Bamaxam Sulai ,  Fenglin Peng ,  Brian Wheelwright

IPC: G02F1/1347 ,  G02B27/28 ,  G02B27/00 ,  G09G3/00

CPC classification number: G02B27/283 ,  G02B27/0093 ,  G02B27/286 ,  G09G3/001 ,  G09G2340/0407 ,  G09G2354/00

Abstract: An optical assembly includes a first reflector and a second reflector. The first reflector is positioned to receive first light having a first polarization and provide the first light toward a first direction, and receive second light having the first polarization and provide the second light toward a second direction. The second reflector is positioned to receive the second light from the first reflector and reflect the second light back toward the first reflector. The first reflector receives light having a second polarization, having been reflected by the second reflector, and provide the light toward the first direction so that a first image corresponding to the first light and a second image corresponding to the second light are projected on a common image plane where at least a portion of the second image is located between two portions of the first image.

公开(公告)号：US11619774B2

公开(公告)日：2023-04-04

申请号：US17383245

申请日：2021-07-22

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Jacques Gollier ,  Fenglin Peng ,  Alexander Koshelev ,  Giuseppe Calafiore ,  Lu Lu ,  Ying Geng ,  Yun-Han Lee

IPC: G02B5/32 ,  F21V8/00 ,  G02B6/12 ,  G02B27/09 ,  G02B6/124 ,  G02B6/125 ,  G02B27/01 ,  G02B5/18

Abstract: An illuminator for a display panel includes a light source for providing a light beam and a lightguide coupled to the light source for receiving and propagating the light beam along the substrate. The lightguide includes an array of out-coupling gratings that runs parallel to the array of pixels for out-coupling portions of the light beam from the lightguide such that the out-coupled light beam portions propagate through the substrate and produce an array of optical power density peaks at the array of pixels due to Talbot effect. A period of the array of peaks is an integer multiple of a pitch of the array of pixels.

公开(公告)号：US11592608B2

公开(公告)日：2023-02-28

申请号：US16734163

申请日：2020-01-03

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Fenglin Peng ,  Ying Geng ,  Jacques Gollier ,  Garam Young

IPC: F21V8/00 ,  G02B27/28 ,  G02F1/139 ,  G02B27/01 ,  G02F1/01

Abstract: An optical device for illuminating one or more portions of a spatial light modulator includes a waveguide, an array of tunable retarders, and a polarization selective optical element. A respective tunable retarder is optically coupled to receive light from the waveguide. The respective tunable retarder has a first state, which causes the respective tunable retarder to direct light having a first polarization in a first direction, and a second state, which causes the respective tunable retarder to direct light having a second polarization distinct from the first polarization in the first direction. The polarization selective optical element is located adjacent to the array of tunable retarders so that the light having the first polarization propagates from the polarization selective optical element in a second direction and the light having the second polarization propagates from the polarization selective optical element in a third direction distinct from the second direction.

公开(公告)号：US11573445B2

公开(公告)日：2023-02-07

申请号：US17371840

申请日：2021-07-09

Applicant: Meta Platforms Technologies, LLC

Inventor： Linghui Rao ,  Samara Kate Sytsma ,  Jacques Gollier ,  Agnes Lee ,  Fenglin Peng

IPC: G02F1/1335

Abstract: A display device includes a plurality of pixels arranged across a display area of a display device, and a black matrix configured to block a portion of light outputted by each pixel of the plurality of pixels. The black matrix is configured to allow light from the second pixel having a first output intensity distribution having a peak intensity corresponding to a first direction to pass through, and to allow light from the first pixel having a second output intensity distribution having a peak intensity corresponding to a second direction to pass through.

公开(公告)号：US20230014577A1

公开(公告)日：2023-01-19

申请号：US17374888

申请日：2021-07-13

Applicant: Meta Platforms Technologies, LLC

Inventor： Jacques Gollier ,  Fenglin Peng ,  Ying Geng ,  Anqi Ji

IPC: G02B27/01 ,  G02B27/00 ,  G02B26/08 ,  G02B27/28

Abstract: A directional illuminator includes a light source, a pupil-replicating lightguide, and a tiltable reflector coupling the light source to the pupil-replicating lightguide. The exit beam angle of the light outputted by the pupil-replicating lightguide follows the in-coupling angle, and accordingly depends on the tilting angle of the tiltable reflector. The directional illuminator with steered light beam may be used to illuminate a display panel. Steering the illuminating light by the tiltable reflector enables one to steer the exit pupil of the display device to match the user's eye location(s).

公开(公告)号：US20230011408A1

公开(公告)日：2023-01-12

申请号：US17371840

申请日：2021-07-09

Applicant: Meta Platforms Technologies, LLC

Inventor： Linghui Rao ,  Samara Kate Sytsma ,  Jacques Gollier ,  Agnes Lee ,  Fenglin Peng

IPC: G02F1/1335

Abstract: A display device includes a plurality of pixels arranged across a display area of a display device, and a black matrix configured to block a portion of light outputted by each pixel of the plurality of pixels. The black matrix is configured to allow light from the second pixel having a first output intensity distribution having a peak intensity corresponding to a first direction to pass through, and to allow light from the first pixel having a second output intensity distribution having a peak intensity corresponding to a second direction to pass through.

公开(公告)号：US11422409B2

公开(公告)日：2022-08-23

申请号：US16851874

申请日：2020-04-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Jacques Gollier ,  Fenglin Peng ,  Junren Wang ,  Lu Lu

IPC: G02F1/13363 ,  G02B5/30

Abstract: An optical waveplate is provided. The optical waveplate includes a first birefringent film including optically anisotropic molecules arranged to form a first twist structure. The optical waveplate also includes a second birefringent film including optically anisotropic molecules arranged to form a second twist structure, the second birefringent film being stacked with the first birefringent film. The optically anisotropic molecules at a first portion of the first birefringent film adjacent an interface between the first birefringent film and the second birefringent film are configured with a first azimuthal angle. The optically anisotropic molecules at a second portion of the second birefringent film adjacent the interface are configured with a second azimuthal angle. The first azimuthal angle is substantially the same as the second azimuthal angle.