公开(公告)号：US11874474B1

公开(公告)日：2024-01-16

申请号：US17018579

申请日：2020-09-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han Lee ,  Mengfei Wang ,  Junren Wang ,  Lu Lu ,  Robin Sharma ,  Gregory Olegovic Andreev ,  Garam Young ,  Andrew John Ouderkirk ,  Babak Amirsolaimani ,  Fenglin Peng ,  Barry David Silverstein

IPC: G02B27/01 ,  G02B27/42 ,  G02B27/28 ,  G02F1/31 ,  H04N23/55 ,  H04N23/75

CPC classification number: G02B27/0179 ,  G02B27/0172 ,  G02B27/283 ,  G02B27/286 ,  G02B27/4205 ,  G02F1/31 ,  H04N23/55 ,  H04N23/75 ,  G02B2027/011 ,  G02B2027/0138 ,  G02B2027/0187 ,  G02F2203/01 ,  G02F2203/07 ,  G02F2203/24

Abstract: A system includes a diffractive optical element including at least one substrate and a grating structure. The grating structure is configured to diffract a first light having an incidence angle within a predetermined range, and the at least one substrate is configured to reflect a second light. The system also includes a polarization selective mechanism configured to generate images based on the first light and the second light, respectively.

公开(公告)号：US11846797B2

公开(公告)日：2023-12-19

申请号：US16862396

申请日：2020-04-29

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Jacques Gollier ,  Brian Wheelwright ,  Ying Geng ,  Babak Amirsolaimani ,  Fenglin Peng

IPC: G02B6/10 ,  G02F1/13 ,  F21V8/00 ,  G02B5/30 ,  G02B27/01 ,  G02B27/00 ,  G02B27/14 ,  G02B27/28 ,  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 an optical waveguide and a plurality of reflective polarizers. The plurality of reflective polarizers include a first reflective polarizer and a second reflective polarizer disposed inside the optical waveguide so that the first reflective polarizer receives light propagating inside the optical waveguide, redirects a first portion of the light in a first direction, and transmits a second portion of the light in a second direction non-parallel to the first direction. The second reflective polarizer receives the second portion of the light from the first reflective polarizer, redirects a third portion of the light, and transmits a fourth portion of the light. A ratio between the first portion and the second portion of the light has a first value and a ratio between the third portion and the fourth portion of the light has a second value distinct from the first value.

公开(公告)号：US11835729B2

公开(公告)日：2023-12-05

申请号：US18049173

申请日：2022-10-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Fenglin Peng ,  Ying Geng ,  Oleg Yaroshchuk

IPC: G02B27/28 ,  G02B27/01 ,  G02B27/42 ,  G02F1/1362 ,  G02B27/00 ,  G02F1/1335 ,  G02B5/30

CPC classification number: G02B27/283 ,  G02B27/0172 ,  G02B27/425 ,  G02F1/136277 ,  G02B2027/0178

Abstract: An example optical assembly includes a display, a light source for illuminating the display, and a diffraction type polarizing beam splitter (DT-PBS) configured to direct light from a light director, wherein the DT-PBS is polarization sensitive and configured to direct, based on polarization, a first portion of light towards the display.

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.

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.

公开(公告)号：US12204107B2

公开(公告)日：2025-01-21

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 ,  G02B26/08 ,  G02B27/09

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：US20240255758A1

公开(公告)日：2024-08-01

申请号：US18420128

申请日：2024-01-23

Applicant: Meta Platforms Technologies, LLC

Inventor： Andrew John Ouderkirk ,  Fenglin Peng ,  Ying Geng ,  Brian Wheelwright

IPC: G02B27/01 ,  G02B5/00 ,  G02B5/30

CPC classification number: G02B27/0172 ,  G02B5/003 ,  G02B5/3058 ,  G02B5/3083 ,  G02B2027/0178

Abstract: A device may include an optical system that creates an image to a user and a light- absorbing element that absorbs a portion of the light transmitted by the optical system. The optical system may include a beamsplitting element and a reflective polarizer that reflects a first handedness of circularly polarized light and transmits a second handedness of polarized light. Various other devices, systems, and methods of manufacture are also disclosed.

公开(公告)号：US11880113B2

公开(公告)日：2024-01-23

申请号：US17736085

申请日：2022-05-03

Applicant: Meta Platforms Technologies, LLC

Inventor： Lu Lu ,  Fenglin Peng ,  Douglas Robert Lanman

IPC: G02F1/29 ,  G02B30/36

CPC classification number: G02F1/29 ,  G02B30/36 ,  G02F1/294

Abstract: A device includes a first-type liquid crystal (LC) lens configured to provide a first optical power that is variable in a first step resolution. The device also includes a second-type LC lens coupled with the first-type LC lens, and configured to provide a second optical power that is variable in a second step resolution. The first step resolution is smaller than the second step resolution. A total optical power of the device is a sum of the first optical power and the second optical power, and is variable in the first step resolution.

公开(公告)号：US11852836B2

公开(公告)日：2023-12-26

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 ,  G02B26/08 ,  G02B27/00 ,  G02B27/28

CPC classification number: G02B27/0179 ,  G02B26/0833 ,  G02B27/0093 ,  G02B27/0172 ,  G02B27/286 ,  G02B2027/0174 ,  G02B2027/0187

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：US11675188B2

公开(公告)日：2023-06-13

申请号：US17474362

申请日：2021-09-14

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han Lee ,  Lu Lu ,  Mengfei Wang ,  Fenglin Peng ,  Junren Wang

IPC: G02B27/00 ,  G02B27/01 ,  G03H1/02 ,  G02B5/32

CPC classification number: G02B27/0037 ,  G02B5/32 ,  G02B27/0172 ,  G02B27/0179 ,  G03H1/0248 ,  G02B2027/0109 ,  G02B2027/0116 ,  G02B2027/0174 ,  G02B2027/0178 ,  G02B2027/0187 ,  G03H2001/0264

Abstract: A system is provided. The system includes a light source configured to emit an infrared light to illuminate an eye of a user. The system includes a grating disposed facing the eye and including a birefringent material film configured with a uniform birefringence lower than or equal to 0.1. The grating is configured to diffract the infrared light reflected from the eye, and transmit a visible light from a real world environment toward the eye, with a diffraction efficiency less than a predetermined threshold. The system includes an optical sensor configured to receive the diffracted infrared light and generate an image of the eye based on the diffracted infrared light.