公开(公告)号：US11667059B2

公开(公告)日：2023-06-06

申请号：US16745850

申请日：2020-01-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Giuseppe Calafiore

IPC: B29C33/42 ,  G03F7/00 ,  B29C33/60 ,  G02B1/10 ,  C23C16/40 ,  C23C16/34 ,  C23C14/06 ,  C23C14/08 ,  C23C16/515

CPC classification number: B29C33/424 ,  B29C33/60 ,  C23C14/0652 ,  C23C14/08 ,  C23C16/345 ,  C23C16/40 ,  C23C16/515 ,  G02B1/10 ,  G03F7/0002 ,  B29C2033/426

Abstract: Disclosed herein are techniques for molding a slanted structure. In some embodiments, a mold for nanoimprint lithography includes a support layer, a polymeric layer on the support layer and including a slanted structure, and an oxide layer on surfaces of the slanted structure. In some embodiments, the oxide layer is conformally deposited on the surfaces of the slanted structure by atomic layer deposition. In some embodiments, the mold further includes an anti-sticking layer on the oxide layer.

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：US11579364B2

公开(公告)日：2023-02-14

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 ,  G02B5/18 ,  G02B27/01 ,  H01J37/305 ,  H01L21/321 ,  H01L21/027 ,  G02B6/12 ,  G02B6/34

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：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.

公开(公告)号：US11474352B2

公开(公告)日：2022-10-18

申请号：US17137530

申请日：2020-12-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Giuseppe Calafiore ,  Oleg Yaroshchuk ,  Barry David Silverstein

IPC: G02B27/01 ,  G02B27/42 ,  G02B5/18

Abstract: A device includes a waveguide. The device also includes a plurality of grating sets coupled with the waveguide and configured to, during a plurality of time periods, couple a plurality of input image lights into the waveguide and couple the input image lights out of the waveguide as a plurality of output image lights. The plurality of input image lights have a substantially same input field of view (“FOV”) with a substantially same symmetry axis. A combined output FOV of the output image lights is larger than the input FOV.

公开(公告)号：US11455031B1

公开(公告)日：2022-09-27

申请号：US15997473

申请日：2018-06-04

Applicant: Meta Platforms Technologies, LLC

Inventor： Robin Sharma ,  Andrew John Ouderkirk ,  Matthew E. Colburn ,  Qi Zhang ,  Giuseppe Calafiore ,  John Goward ,  Karol Constantine Hatzilias ,  Matthieu Charles Raoul Leibovici ,  Nihar Ranjan Mohanty ,  Selso Luanava

IPC: G06F3/01 ,  H04N5/225 ,  G02B19/00 ,  G02B27/01

Abstract: Disclosed herein are techniques for eye illumination for eye position tracking. An illuminator for eye tracking includes a substrate configured to be placed in front of an eye of a user and a light source positioned on a surface of the substrate. The light source is configured to be positioned within a field of view of the eye of the user. A maximum dimension of the light source in a plane parallel to an emission surface of the light source is less than 500 μm.

公开(公告)号：US20240295690A1

公开(公告)日：2024-09-05

申请号：US18441693

申请日：2024-02-14

Applicant: Meta Platforms Technologies, LLC

Inventor： Dusan COSO ,  Steven Alexander-Boyd Hickman ,  Giuseppe Calafiore ,  Petr Markov ,  Shermin Arab ,  John Michael Goward ,  Rahul Agarwal ,  Zhujun Shi

IPC: G02B6/12

CPC classification number: G02B6/12 ,  G02B2006/12121

Abstract: According to examples, an apparatus for implementing a hermetically-covered photonic integrated circuit on a substrate having an integrated laser diode is described. The apparatus may include a cover wafer, a housing layer including a waveguide, the waveguide including a photonic integrated circuit, a laser die including a laser cavity, and a base substrate. The base substrate may include an emission window to provide a reflective design and to eliminate a need for a polarized beam splitter, a through-wafer via element to electrical coupling to the laser die and one or more pillars to set a height of the laser die relative to the photonic integrated circuit.

公开(公告)号：US11879024B1

公开(公告)日：2024-01-23

申请号：US17375874

申请日：2021-07-14

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Zachary Perlmutter ,  Tingling Rao ,  Giuseppe Calafiore ,  Emily Anne Makoutz

IPC: C08F222/20 ,  G03F7/004

CPC classification number: C08F222/20 ,  G03F7/0046

Abstract: Disclosed herein is a nanoimprint lithography (NIL) soft mold precursor material comprising a curable fluorinated base resin component, one or more additives, one or more crosslinkers, and one or more of a photo radical generator, a photo acid generator, or both. According to certain embodiments, further disclosed herein are a polymeric material comprising a partially or totally polymerized or crosslinked NIL precursor material, a NIL soft mold comprising the polymeric material, a process for making the NIL soft mold, and a method of using the NIL soft mold to form a NIL grating.

公开(公告)号：US20230185011A1

公开(公告)日：2023-06-15

申请号：US17741404

申请日：2022-05-10

Applicant: Meta Platforms Technologies, LLC

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

IPC: F21V8/00 ,  G02F1/1343

CPC classification number: G02B6/0036 ,  G02F1/134309 ,  G02B6/0078 ,  G02F1/13439 ,  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：US20230176367A1

公开(公告)日：2023-06-08

申请号：US17581588

申请日：2022-01-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Babak Amirsolaimani ,  Renate Eva Klementine Landig ,  Andrew Maimone ,  Giuseppe Calafiore

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

CPC classification number: G02B27/0081 ,  G02B6/0035 ,  G02B27/0172 ,  G02B2027/0174

Abstract: A lightguide for conveying image light to an eyebox of a display device includes a tunable grating, e.g. an out-coupling grating for out-coupling the image light from the lightguide. The tunable grating may be tuned or switched to effectively diffract light of a color channel of a color-sequential display. In augmented reality display systems, a lightguide combiner element may include a switchable grating to out-couple the image light only during short time intervals and to not out-couple the image light in between these time intervals. Effectively, the out-coupling grating is present only a portion of overall operation time of the display, which improves the transparency of the combiner element to the outside light and reduces rainbow effects.