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

IPC: G02B27/42 ,  G02B6/02 ,  G02B6/293 ,  G02B27/01 ,  G02B27/28 ,  F21V8/00

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.

公开(公告)号：US20220326436A1

公开(公告)日：2022-10-13

申请号：US17849065

申请日：2022-06-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Matthew E. Colburn ,  Giuseppe Calafiore ,  Matthieu Charles Raoul Leibovici ,  Nihar Ranjan Mohanty

IPC: G02B6/124 ,  G02B27/01 ,  H01J37/305 ,  H01L21/321 ,  H01L21/027 ,  G02B5/18

Abstract: A manufacturing system performs a deposition of an etch-compatible film over a substrate. The etch-compatible film includes a first surface and a second surface opposite to the first surface. The manufacturing system performs a partial removal of the etch-compatible film to create a surface profile on the first surface with a plurality of depths relative to the substrate. The manufacturing system performs a deposition of a second material over the profile created in the etch-compatible film. The manufacturing system performs a planarization of the second material to obtain a plurality of etch heights of the second material in accordance with the plurality of depths in the profile created in the etch-compatible film. The manufacturing system performs a lithographic patterning of a photoresist deposited over the planarized second material to obtain the plurality of etch heights and one or more duty cycles in the second material.

公开(公告)号：US11448806B1

公开(公告)日：2022-09-20

申请号：US17202179

申请日：2021-03-15

Applicant: Meta Platforms Technologies, LLC

Inventor： Matthew E. Colburn ,  Giuseppe Calafiore ,  Matthieu Charles Raoul Leibovici ,  Maxwell Parsons

IPC: G02B5/18 ,  H01L21/308 ,  H01L21/306 ,  F21V8/00 ,  G02B27/01 ,  G03F7/00

Abstract: A lithographic patterning of a resist is performed to create a mandrel over a substrate. A deposition of one or more functional materials on the mandrel is performed. And each functional material has a respective refractive index. A selective removal of the mandrel is performed to create a plurality of grating elements formed from the one or more functional materials. The plurality of grating elements are self-aligned and form a diffraction grating. Each grating element may have a heterogenous refractive index (e.g., substantial normal to and/or parallel to a surface of the substrate). The diffraction grating may be used in a near-eye display.

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

IPC: G02B27/01 ,  F21V8/00 ,  G02B6/34 ,  G02B27/00 ,  G02B27/42

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.

公开(公告)号：US11422369B1

公开(公告)日：2022-08-23

申请号：US15963239

申请日：2018-04-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Maxwell Parsons ,  Giuseppe Calafiore ,  Wanli Chi

IPC: G02B27/01 ,  B29D11/00 ,  B29C71/04 ,  B29C43/14

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.

公开(公告)号：US20250076557A1

公开(公告)日：2025-03-06

申请号：US18401296

申请日：2023-12-29

Applicant: Meta Platforms Technologies, LLC

Inventor： Guohua Wei ,  Zhujun Shi ,  Min Chul Shin ,  Risheng Cheng ,  Giuseppe Calafiore

IPC: F21V8/00

Abstract: A display system may include a display element having an array of pixels, at least one light source, and a photonic integrated circuit (PIC) illumination element overlapping the display element. The PIC illumination element may include at least one in-coupler for in-coupling light from the at least one light source and an array of out-coupling emitters configured to emit light from the PIC illumination element toward the display element. The array of out-coupling emitters may not be aligned pixel-by-pixel with the array of pixels. Various other devices, systems, and methods are also disclosed.

公开(公告)号：US11860395B2

公开(公告)日：2024-01-02

申请号：US18129656

申请日：2023-03-31

Applicant: Meta Platforms Technologies, LLC

Inventor： Zhujun Shi ,  Keith Patterson ,  Maxwell Parsons ,  Yongdan Hu ,  Giuseppe Calafiore ,  Zhimin Shi

IPC: F21V8/00 ,  G02F1/1343

CPC classification number: G02B6/0036 ,  G02B6/0078 ,  G02F1/13439 ,  G02F1/134309 ,  G02F2201/063 ,  G02F2201/302

Abstract: A self-lit display panel includes a photonic integrated circuit payer including an array of waveguides and an array of out-couplers for out-coupling portions of the illuminating light through pixels of the panel. The self-lit display panel may include a transparent electronic circuitry layer backlit by the photonic integrated circuit layer; the two layers may be on a same substrate or on opposed substrates defining a cell filled with an electro-active material. The configuration allows for chief ray engineering, zonal illuminating, and separate illumination with red, green, and blue illuminating light.

公开(公告)号：US11803024B2

公开(公告)日：2023-10-31

申请号：US17374932

申请日：2021-07-13

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Jonathan Robert Peterson ,  John Goward ,  Maik Andre Scheller ,  Andrew John Ouderkirk ,  Christopher Yuan Ting Liao ,  Giuseppe Calafiore ,  Alexander Koshelev

IPC: G02B6/42 ,  G02B26/08 ,  G02B5/30 ,  G06F3/01

CPC classification number: G02B6/4298 ,  G02B5/3025 ,  G02B26/0833 ,  G06F3/014 ,  G06F3/016

Abstract: A device includes a light source to emit light and a light detector to receive the light emitted by the light source. The device may include a high voltage optical transformer and may be configured such that the light detector is laterally spaced away from the light source. In some architectures, the light source and the light detector may be arranged in a common plane. A photonic integrated circuit may be used to couple light emitted from the light source to the light detector.

公开(公告)号：US11796813B2

公开(公告)日：2023-10-24

申请号：US17064567

申请日：2020-10-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Ningfeng Huang ,  Oleg Yaroshchuk ,  Heeyoon Lee ,  Giuseppe Calafiore ,  Barry David Silverstein

IPC: G02B27/01 ,  G02B27/00 ,  F21V8/00 ,  G02B3/00

CPC classification number: G02B27/0172 ,  G02B27/0081 ,  G02B27/0093 ,  G02B3/0006 ,  G02B6/0026 ,  G02B6/0078 ,  G02B2027/0174

Abstract: A system includes one or more waveguides, and a plurality of grating sets coupled with the one or more waveguides. A plurality of combinations of gratings from the grating sets are configurable to direct an image light to propagate through a plurality of sub-eyeboxes forming an uncompressed eyebox. The system also includes a controller configured to selectively configure one or more combinations of gratings to operate in a diffraction state to direct the image light to propagate through one or more sub-eyeboxes forming a compressed eyebox having a size smaller than a size of the uncompressed eyebox.

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.