公开(公告)号：US20240274758A1

公开(公告)日：2024-08-15

申请号：US18421942

申请日：2024-01-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Shenglin YE ,  Xinyu ZHU ,  Xiangtong LI ,  Ruiqing MA ,  Yu-Jen WANG ,  Yun-Han LEE ,  Linghui RAO ,  Sascha HALLSTEIN

IPC: H01L33/50 ,  G02F1/13357 ,  G06F3/01 ,  H01L25/075 ,  H01L25/16 ,  H01L33/62

CPC classification number: H01L33/502 ,  H01L25/0753 ,  H01L25/167 ,  H01L33/62 ,  G02F1/133603 ,  G06F3/011

Abstract: A light-emitting diode (“LED”) package includes a package housing defining a space. The LED package includes a first LED disposed with the space defined by the package housing, and configured to emit a first light having a blue wavelength range. The blue wavelength range has a peak wavelength ranging from about 440 nm to about 480 nm. The LED package includes a second LED disposed within the space, and configured to emit a second light having a red wavelength range. The red wavelength range has a peak wavelength ranging from about 610 nm to about 680 nm. The LED package includes a phosphor filler filling the space and configured to absorb a portion of the first light to emit a third light having a green wavelength range. The green wavelength range has a peak wavelength ranging from about 510 nm to about 570 nm.

公开(公告)号：US20230417962A1

公开(公告)日：2023-12-28

申请号：US17103920

申请日：2020-11-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han LEE ,  Mengfei WANG ,  Stephen CHOI ,  Kieran Connor KELLY ,  Lu LU ,  Kyle Justin CURTS

IPC: G02B5/18 ,  G02B27/28 ,  G03H1/04

CPC classification number: G02B5/1814 ,  G02B27/286 ,  G03H1/0402 ,  G03H2223/23 ,  G03H2227/05 ,  G03H2222/52

Abstract: A system includes a surface relief grating configured to forwardly diffract an input beam as two linearly polarized beams. The system also includes a waveplate optically coupled with the surface relief grating and configured to convert the two linearly polarized beams into two circularly polarized beams having orthogonal circular polarizations. The two circularly polarized beams having orthogonal circular polarizations interfere with one another to generate a polarization interference pattern.

公开(公告)号：US20240175676A1

公开(公告)日：2024-05-30

申请号：US18071298

申请日：2022-11-29

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han LEE ,  Scott Charles MCELDOWNEY ,  Lu LU ,  Mantas ZURAUSKAS ,  Qing CHAO

IPC: G01B11/22 ,  G02F1/01

CPC classification number: G01B11/22 ,  G02F1/0136 ,  G02B27/283

Abstract: According to examples, a depth sensing apparatus may include an illumination source to output a light beam onto a polarizing beam separation element (PBSE). The PBSE may generate a right hand circularly polarized (RCP) beam and a left hand circularly polarized (LCP) beam to be projected onto a target area, in which the RCP beam and the LCP beam may create an interference with respect to each other. The depth sensing apparatus also includes an imaging component to capture an image of the target area with the RCP beam and the LCP beam projected on the target area, in which the captured image is to be analyzed for depth sensing of the target area. The depth sensing apparatus further includes a polarizer that may increase an intensity of the interference pattern.

公开(公告)号：US20220413205A1

公开(公告)日：2022-12-29

申请号：US17901851

申请日：2022-09-02

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han LEE ,  Lu LU ,  Mengfei WANG ,  Fenglin PENG ,  Junren WANG ,  Oleg YAROSHCHUK ,  Yingfei JIANG ,  Babak AMIRSOLAIMANI ,  Scott Charles MCELDOWNEY

IPC: F21V8/00 ,  G02B27/01 ,  G03H1/02

Abstract: A device includes a display configured to generate an image light. The device also includes a waveguide optically coupled with the display and configured to guide the image light to an exit pupil of the device. The waveguide includes a grating including a birefringent material, and a birefringence of the grating is configured to increase along a pupil-expanding direction of the device.

公开(公告)号：US20250060588A1

公开(公告)日：2025-02-20

申请号：US18776525

申请日：2024-07-18

Applicant: Meta Platforms Technologies, LLC

Inventor： Hyunmin SONG ,  Min Hyuk CHOI ,  Yun-Han LEE ,  Michael ESCUTI ,  Zhiming ZHUANG

IPC: G02B27/01

Abstract: A system includes a display element configured to output an image light. The system also includes an image combiner configured to guide the image light toward an eye-box region of the system. The system also includes a dimming device disposed at a side of the image combiner. The dimming device includes a dimming material layer including a mixture of liquid crystal (“LC”) molecules and dye molecules, and pretilt angles of the LC molecules and the dye molecules are configured with a predetermined variation in at least two opposite in-plane directions from a center to two opposite peripheries of the dimming material layer.

公开(公告)号：US20230185236A1

公开(公告)日：2023-06-15

申请号：US17954326

申请日：2022-09-28

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han LEE ,  Changwon JANG ,  Hyunmin SONG ,  Chulwoo OH ,  Matthieu Charles Raoul LEIBOVICI

IPC: G03H1/04 ,  G03H1/02

CPC classification number: G03H1/0402 ,  G03H1/0248 ,  G03H2222/31 ,  G03H2001/0439 ,  G03H2223/20 ,  G03H2223/22 ,  G03H2250/42

Abstract: A system includes a light outputting element configured to output a first beam propagating toward a beam interference zone from a first side of the beam interference zone. The system also includes a wavefront shaping assembly disposed at a second side of the beam interference zone and including a polarization hologram, the wavefront shaping assembly being configured to reflect the first beam as a second beam propagating toward the beam interference zone from the second side. The first beam and the second beam are linearly polarized beams, and are configured to interfere with one another within the beam interference zone to generate an interference pattern that is recordable in a recording medium layer disposed in the beam interference zone.

公开(公告)号：US20220365266A1

公开(公告)日：2022-11-17

申请号：US17681191

申请日：2022-02-25

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui CHENG ,  Lu LU ,  Yitian DING ,  Yun-Han LEE ,  Junren WANG ,  Mengfei WANG

IPC: G02B5/32 ,  G02B5/30

Abstract: A device is provided. The device includes a first polarization hologram element having a first operating wavelength band and configured to selectively backwardly diffract or transmit a first light associated with the first operating wavelength band based on a polarization of the first light. The device also includes a second polarization hologram element having a second operating wavelength band and stacked with the first polarization hologram. A thickness of the first polarization hologram element is configured based on a signal-to-noise ratio between a diffraction efficiency of the first polarization hologram element for the first light and a diffraction efficiency of the first polarization hologram element for a second light associated with the second operating wavelength band being greater than a predetermined value.

公开(公告)号：US20240036316A1

公开(公告)日：2024-02-01

申请号：US17874211

申请日：2022-07-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Chulwoo OH ,  Hyunmin SONG ,  Junren WANG ,  Lu LU ,  Sawyer MILLER ,  Stefanie TAUSHANOFF ,  Yun-Han LEE

IPC: G02B27/01 ,  G02B5/30 ,  G02B27/28

CPC classification number: G02B27/0172 ,  G02B5/3016 ,  G02B27/286 ,  G02B2027/0178

Abstract: A Pancharatnam-Berry phase (PBP) lens includes a substrate and one or more liquid crystal material layers on the substrate. The one or more liquid crystal material layers include a plurality of zones at different distances from a center of the PBP lens, where different zones of the plurality of zones of the one or more liquid crystal material layers have different liquid crystal twist angles along a surface-normal direction of the substrate and different phase delays for surface-normal incident light. The PBP lens can have an f-number less than 1, and can be used in a near-eye display system to project display images to an eye of a user at an efficiency greater than 75% at a peripheral region of the PBP lens.

公开(公告)号：US20230333380A1

公开(公告)日：2023-10-19

申请号：US17721220

申请日：2022-04-14

Applicant: Meta Platforms Technologies, LLC

Inventor： Dong CHEN ,  Yun-Han LEE ,  Kilbock LEE ,  Zhiming ZHUANG ,  Donghee NAM ,  Hyunmin SONG

IPC: G02B27/01 ,  H01L25/16 ,  H01L27/32 ,  H01L51/52 ,  H01L33/58 ,  H01L33/30 ,  H01L33/62

CPC classification number: G02B27/0172 ,  H01L25/167 ,  H01L27/322 ,  H01L51/5275 ,  H01L33/58 ,  H01L33/30 ,  H01L51/5293 ,  H01L33/62 ,  G02B2027/0178

Abstract: A micro-light emitting diode device includes a backplane including drive circuits formed thereon, an array of micro-LEDs bonded to the backplane and electrically coupled to the drive circuits, an array of polarization diffraction micro-lenses bonded to the array of micro-LEDs and including a planar surface, and a cover glass bonded to the planar surface of the array of polarization diffraction micro-lenses. A center of each polarization diffraction micro-lens of the array of polarization diffraction micro-lenses aligns with a center of a respective micro-LED of the array of micro-LEDs.

公开(公告)号：US20220317624A1

公开(公告)日：2022-10-06

申请号：US17217249

申请日：2021-03-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Xingzhou TU ,  Yun-Han LEE ,  Mengfei WANG ,  Stephen CHOI ,  Lu LU

IPC: G03H1/04 ,  G02B5/18 ,  G02F1/1337 ,  G03H1/02

Abstract: A system includes a light outputting element configured to output a first beam propagating toward a beam interference zone from a first side of the beam interference zone. The system also includes a reflective assembly configured to reflect the first beam back as a second beam propagating toward the beam interference zone from a second side of the beam interference zone. The first beam and the second beam interfere with one another within the beam interference zone to generate a polarization interference pattern.