公开(公告)号：US12099190B2

公开(公告)日：2024-09-24

申请号：US17549394

申请日：2021-12-13

Applicant: Meta Platforms Technologies, LLC

Inventor： Sihui He ,  Maxwell Parsons ,  Fenglin Peng ,  Miaomiao Xu ,  Yang Yang ,  Yu Shi ,  Dianmin Lin

IPC: G02B27/01 ,  G02B5/18 ,  G02B5/32 ,  G02B6/42 ,  G02B27/00 ,  F21V8/00

CPC classification number: G02B27/0172 ,  G02B5/1842 ,  G02B5/32 ,  G02B6/4206 ,  G02B6/4213 ,  G02B27/0081 ,  G02B6/0018 ,  G02B6/0036 ,  G02B2027/0174 ,  G02B2027/0178

Abstract: A waveguide is provided. The waveguide includes a substrate having two outer surfaces for propagating a beam of light in the substrate by reflecting the beam from the two outer surfaces. The waveguide includes at least one polarization volume hologram (PVH) grating to couple light in and/or out of the waveguide. The PVH grating may be a multi-layer PVH grating with graded birefringence.

公开(公告)号：US11727891B2

公开(公告)日：2023-08-15

申请号：US17528036

申请日：2021-11-16

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Zhimin Shi ,  James Ronald Bonar ,  Fenglin Peng ,  Ying Geng

IPC: G09G3/36 ,  G09G3/34 ,  F21V8/00 ,  G02F1/1335

CPC classification number: G09G3/3473 ,  G02B6/005 ,  G09G3/3406 ,  G09G3/36 ,  G02F1/133512 ,  G09G2300/0426 ,  G09G2320/0209

Abstract: In various embodiments, an apparatus comprises a composite backplane that modulates light from a light source, where the composite backplane comprises an electronics layer disposed on a substrate, a photonics integrated circuit (IC) layer disposed on the electronics layer that causes light from the light source to propagate in a first direction, and an active light modulation (ALM) interface layer disposed on the photonics IC layer controls an ALM interface layer in order to control the light propagating in the first direction.

公开(公告)号：US20220382080A1

公开(公告)日：2022-12-01

申请号：US17330422

申请日：2021-05-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui Cheng ,  Yang Zhao ,  Hannah Noble ,  Fenglin Peng ,  Lu Lu

IPC: G02F1/01 ,  G02F1/1347 ,  G02F1/139 ,  G02B27/01

Abstract: A polarization modulator includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell has a first type of liquid crystals configured to rotate an optical axis of light parallel to a first plane of the first liquid crystal cell. The second liquid crystal cell is configured to receive the light from the first liquid crystal cell. The second liquid crystal cell has a second type of liquid crystals configured to rotate the optical axis of the light perpendicular to a second plane of the second liquid crystal cell.

公开(公告)号：US11513362B2

公开(公告)日：2022-11-29

申请号：US16872101

申请日：2020-05-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Fenglin Peng ,  Ying Geng ,  Oleg Yaroshchuk

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

Abstract: An example optical assembly includes a display, a light source for illuminating the display, and a first diffraction type polarizing beam splitter (DT-PBS) configured to direct light from a first light director, wherein the first 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：US11480807B2

公开(公告)日：2022-10-25

申请号：US16872101

申请日：2020-05-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Fenglin Peng ,  Ying Geng ,  Oleg Yaroshchuk

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

Abstract: An example optical assembly includes a display, a light source for illuminating the display, and a first diffraction type polarizing beam splitter (DT-PBS) configured to direct light from a first light director, wherein the first 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：US12259553B2

公开(公告)日：2025-03-25

申请号：US17666227

申请日：2022-02-07

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Miaomiao Xu ,  Brian Wheelwright ,  Fenglin Peng ,  Ying Geng ,  Changwon Jang ,  Maxwell Parsons ,  Sihui He ,  Jacques Gollier

IPC: G02B27/01 ,  G02B27/14 ,  G02B27/28

Abstract: An illuminator for illuminating a display panel includes a lightguide with an array of buried slanted bulk reflectors that out-couple portions of the light beam propagating in the lightguide through one of the lightguide surfaces. Polarization beam-splitting slanted surfaces may be used to provide polarized output. Such an illuminator may be used with a reflective display panel operating by polarization. The beam-splitting slanted surfaces operate as a polarizer, providing polarized illuminating light. The light reflected by the reflective panel may propagate back through the illuminator, and the polarization beam-splitting slanted surfaces may operate also as analyzer.

公开(公告)号：US20240081122A1

公开(公告)日：2024-03-07

申请号：US18462477

申请日：2023-09-07

Applicant: Meta Platforms Technologies, LLC

Inventor： Zhimin Shi ,  Yun Wang ,  Fenglin Peng ,  Christophe Antoine Hurni ,  James Ronald Bonar ,  Edward Buckley ,  Andrew John Ouderkirk ,  Yongdan Hu

IPC: H10K59/38 ,  H10K59/50 ,  H10K59/80

CPC classification number: H10K59/38 ,  H10K59/50 ,  H10K59/878 ,  H10K59/879 ,  H10K59/8793

Abstract: A display system may include a light source that emits input light having a wavelength within a source wavelength range and an array of color conversion units overlapping a display area. A first set of color conversion units of the array of color conversion units may include a first color conversion medium that converts the input light to a first color of light having a wavelength within a first wavelength range that is different than the source wavelength range. The display system may also include a waveguide having an out-coupler that directs the input light from the light source toward the array of color conversion units. Various other devices, systems, and methods are also disclosed.

公开(公告)号：US11846774B2

公开(公告)日：2023-12-19

申请号：US17697592

申请日：2022-03-17

Applicant: Meta Platforms 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

IPC: G02B27/00 ,  G02B27/01 ,  G06F3/01 ,  G02F1/29 ,  F21V8/00 ,  G02B6/35 ,  G02F1/1335 ,  G09G3/00 ,  G09G3/34 ,  G06T7/246 ,  H04N23/56 ,  G02F1/335 ,  G03H1/02 ,  G06F1/16 ,  H04N23/698 ,  G01B11/22 ,  G01S7/4865 ,  G01S17/10 ,  G02B27/42 ,  G02F1/33 ,  G06T3/40 ,  G02B27/44 ,  G02B26/08 ,  H04N23/10

CPC classification number: G02B27/0093 ,  G01B11/22 ,  G01S7/4865 ,  G01S17/10 ,  G02B6/005 ,  G02B6/0016 ,  G02B6/0031 ,  G02B6/0035 ,  G02B6/0066 ,  G02B6/3518 ,  G02B26/0816 ,  G02B27/0081 ,  G02B27/0172 ,  G02B27/0179 ,  G02B27/4205 ,  G02B27/44 ,  G02F1/133504 ,  G02F1/133526 ,  G02F1/292 ,  G02F1/294 ,  G02F1/33 ,  G02F1/335 ,  G03H1/0248 ,  G06F1/163 ,  G06F3/013 ,  G06T3/4038 ,  G06T7/246 ,  G09G3/002 ,  G09G3/3413 ,  H04N23/56 ,  H04N23/698 ,  G02B2027/0105 ,  G02B2027/0138 ,  G02B2027/0174 ,  G02B2027/0178 ,  G02B2027/0187 ,  G06T2207/30201 ,  G09G2310/0235 ,  H04N23/10

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.

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.