公开(公告)号：US11681194B2

公开(公告)日：2023-06-20

申请号：US17671449

申请日：2022-02-14

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Erik Shipton ,  Oleg Yaroshchuk

IPC: G02F1/137 ,  G02B27/01 ,  G02F1/1337

CPC classification number: G02F1/13768 ,  G02B27/0172 ,  G02F1/1337 ,  G02B2027/0178

Abstract: Various embodiments set forth liquid crystal (LC) patterning control systems in which LCs are aligned using locally applied magnetic fields. The index of refraction experienced by light propagating through an anisotropic LC is dependent on orientation. As a result, a phase difference may be imparted to an optical beam that is passed through, or reflected from, an array of LCs whose orientations are controlled via locally applied magnetic fields. In some embodiments, the locally applied magnetic fields may be generated by driving currents through wires that intersect at micro or nanomagnetic particles or at magnetic domains, or by applying voltages to micro or nanocoils wrapped around high-permeability cores, among other things.

公开(公告)号：US11594672B2

公开(公告)日：2023-02-28

申请号：US16417911

申请日：2019-05-21

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Tanya Malhotra ,  Kenneth Diest ,  Andrew John Ouderkirk ,  Robin Sharma ,  Barry Silverstein ,  Christopher Yuan Ting Liao ,  Erik Shipton ,  Greg Olegovic Andreev ,  Katherine Marie Smyth

IPC: H01L41/047 ,  H01L41/193 ,  H01L41/09 ,  H04R17/00 ,  G02B27/01 ,  G02F1/01 ,  G02F1/061 ,  G02B5/08 ,  G02B5/30 ,  G02B27/10 ,  G06F3/01 ,  C08F14/20 ,  C08F14/22 ,  C08G77/04 ,  H01L41/083 ,  H01L41/18 ,  G02B5/18 ,  F21V8/00 ,  G02F1/29 ,  H01L41/04 ,  H01L41/253 ,  H02N1/00 ,  B05D3/06 ,  B05D3/10 ,  G02C7/08 ,  G06T19/00 ,  G06V20/20 ,  C08J9/00 ,  C08J9/04 ,  C08J9/28 ,  G02B1/04 ,  G02F1/00 ,  G02F1/065 ,  G02F1/225 ,  B29C55/00 ,  B32B27/20 ,  B32B38/00 ,  B32B38/10 ,  B29D11/00 ,  G02B3/00 ,  G02B5/04 ,  C08L83/04 ,  B82Y30/00 ,  B82Y40/00 ,  G02B7/04 ,  G02B26/00 ,  G02B3/12 ,  B32B27/30 ,  B32B33/00 ,  B29K105/04

Abstract: Examples include a device including a nanovoided polymer element having a first surface and a second surface, a first plurality of electrodes disposed on the first surface, a second plurality of electrodes disposed on the second surface, and a control circuit configured to apply an electrical potential between one or more of the first plurality of electrodes and one or more of the second plurality of electrodes to induce a physical deformation of the nanovoided polymer element.

公开(公告)号：US11777054B1

公开(公告)日：2023-10-03

申请号：US17891930

申请日：2022-08-19

Applicant: Meta Platforms Technologies, LLC

Inventor： Erik Shipton ,  Tanya Malhotra

IPC: H01L33/06 ,  H01L33/00 ,  H01L27/15

CPC classification number: H01L33/06 ,  H01L27/156 ,  H01L33/0062 ,  H01L2933/0083

Abstract: A light-emitting diode includes a first semiconductor region of one of p- or n-conductivity types, a second semiconductor region of the other one of p- or n-conductivity types, forming a p-n junction with the first semiconductor region, and a quantum well layer at the p-n junction between the first and second semiconductor regions. A hyperbolic metamaterial structure is provided in the second semiconductor region. The hyperbolic metamaterial structure is coupled to the quantum well layer for extracting light from the quantum well layer. The hyperbolic metamaterial structure may be patterned to provide an array of nanoantennas to apodize the emitted beam, and to control the polarization state of the emitted beam.

公开(公告)号：US11609424B2

公开(公告)日：2023-03-21

申请号：US16505462

申请日：2019-07-08

Applicant: Meta Platforms Technologies, LLC

Inventor： Gregory Olegovic Andreev ,  Gang Li ,  Erik Shipton ,  Yingfei Jiang ,  Wanli Chi ,  Andrew John Ouderkirk

IPC: G02B27/00 ,  G02B5/32 ,  G02B27/01 ,  G02B5/18

Abstract: Techniques disclosed herein relate to a near-eye display system. One example of an eye-tracking system includes a substrate transparent to visible light and infrared light and a reflective holographic grating conformally coupled to a surface of the substrate. The reflective holographic grating is configured to transmit the visible light and reflectively diffract infrared light in a first wavelength range for eye tracking. The refractive index modulation of the reflective holographic grating is apodized in a direction along a thickness of the reflective holographic grating to reduce optical artifacts in the visible light.

公开(公告)号：US11570413B1

公开(公告)日：2023-01-31

申请号：US16940413

申请日：2020-07-28

Applicant: Meta Platforms Technologies, LLC

Inventor： Erik Shipton ,  Alireza Moheghi ,  Giuseppe Calafiore ,  Hee Yoon Lee

IPC: H04N9/43 ,  G02F1/1334 ,  H04N9/31 ,  G02F1/29 ,  G02B27/01

Abstract: An apparatus may include (1) a planar liquid-crystal structure including a plurality of liquid crystals, and (2) a plurality of electrodes coupled to the planar liquid-crystal structure such that (a) when a first plurality of voltages are applied to at least some of the plurality of electrodes, the plurality of liquid crystals are oriented such that the planar liquid-crystal structure operates as a diffraction grating having a first pitch, and (2) when a second plurality of voltages are applied to at least some of the plurality of electrodes, the plurality of liquid crystals are oriented such that the planar liquid-crystal structure operates as a diffraction grating having a second pitch different from the first pitch.