公开(公告)号：US20230251489A1

公开(公告)日：2023-08-10

申请号：US18129620

申请日：2023-03-31

Applicant: Meta Platforms Technologies, LLC

Inventor： Yang Zhao ,  Afsoon Jamali ,  Junren Wang ,  Wai Sze Tiffany Lam ,  Lu Lu ,  Douglas Robert Lanman

IPC: G02B27/01 ,  G02F1/137 ,  G03B13/36

CPC classification number: G02B27/0172 ,  G02F1/13718 ,  G03B13/36

Abstract: A display system includes a source of unpolarized image light, and a stack of polarization-selective optical elements operable to switchably convert the unpolarized image light into two orthogonally polarized light beams, each of which being switchable in at least one beam characteristic. An output polarizer selects one of the two orthogonally polarized light beams for providing to a user. A depolarizer may be disposed between an electronic display emitting polarized light and the stack. The depolarizer may be in the form of an LC bilayer with randomized in-plane optic axis.

公开(公告)号：US11662582B2

公开(公告)日：2023-05-30

申请号：US16996398

申请日：2020-08-18

Applicant: Meta Platforms Technologies, LLC

Inventor： Gang Li ,  Yang Zhao ,  Changwon Jang ,  Weichuan Gao

IPC: G02B27/01 ,  G02B5/32 ,  G03H1/22

CPC classification number: G02B27/0172 ,  G02B5/32 ,  G03H1/2205 ,  G02B2027/0174 ,  G02B2027/0178 ,  G03H2001/2231

Abstract: A display device includes an image source, a holographic relay, and a holographic image combiner in an off-axis configuration. The holographic relay may include a pair of freeform holographic reflectors relaying light of the image source to an intermediate image plane. The holographic image combiner receives and redirects the relayed light from the holographic relay, forming an image in angular domain at an eyebox of the display device, the image in angular domain corresponding to the image in linear domain generated by the image source.

公开(公告)号：US12022054B2

公开(公告)日：2024-06-25

申请号：US17649436

申请日：2022-01-31

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Yang Zhao ,  Wai Sze Tiffany Lam ,  Lu Lu ,  Douglas Robert Lanman

IPC: H04N13/388 ,  G02F1/01 ,  G09G3/00 ,  H04N13/332 ,  H04N13/398

CPC classification number: H04N13/388 ,  G09G3/003 ,  H04N13/332 ,  H04N13/398 ,  G02F1/0136

Abstract: A volumetric display may include a two-dimensional display; a varifocal optical system configured to receive image light from the two-dimensional display and focus the image light; and at least one processor configured to: control the two-dimensional display to cause a plurality of sub-frames associated with an image frame to be displayed by the display, wherein each sub-frame of the plurality of sub-frames includes a corresponding portion of image data associated with the image frame; and control the varifocal optical system to a corresponding focal state for each respective sub-frame.

公开(公告)号：US20230359081A1

公开(公告)日：2023-11-09

申请号：US18139268

申请日：2023-04-25

Applicant: Meta Platforms Technologies, LLC

Inventor： Zhang Jia ,  Serhan Isikman ,  Yang Zhao ,  Donghee Nam ,  Rungrot Kitsomboonloha ,  Li Zhang

IPC: G09G3/36 ,  G09G3/00 ,  G09G3/3208 ,  G02F1/13357 ,  G02F1/1343 ,  H10K59/50 ,  G02F1/1335 ,  G09G3/34 ,  G02B27/01 ,  G02F1/137

CPC classification number: G02F1/133521 ,  G02B27/0172 ,  G02F1/133528 ,  G02F1/133621 ,  G02F1/134345 ,  G02F1/137 ,  G09G3/001 ,  G09G3/3208 ,  G09G3/3413 ,  G09G3/3607 ,  H10K59/50 ,  G02B2027/0112 ,  G02B2027/0178 ,  G02F2201/52 ,  G09G2300/0456 ,  G09G2300/046 ,  G09G2320/0209

Abstract: A display assembly with dielectric filters is presented herein. The display assembly includes a light source assembly, a dielectric filter array, and a modulation layer. The light source assembly generates laser light in multiple color channels, and each color channel is associated with a different laser emission spectrum. The dielectric filter array includes respective sets of reflective dielectric filters for each color channel. Each set of reflective dielectric filters is matched to the different laser emission spectrum such that reflective dielectric filters in each set transmit light in the different laser emission spectrum and reflect light outside of the different laser emission spectrum. The modulation layer is positioned between a first electrode layer patterned on the dielectric filter array and a second electrode layer. The modulation layer modulates light from the dielectric filter array based on emission instructions applied via the first and second electrode layers to form an image.

公开(公告)号：US20230017964A1

公开(公告)日：2023-01-19

申请号：US17379625

申请日：2021-07-19

Applicant: Meta Platforms Technologies, LLC

Inventor： Hannah Noble ,  Yang Zhao ,  Chia-Hsuan Tai

IPC: G02F1/01

Abstract: An optical lens assembly to accept various illumination ellipticity profiles as angle of incidence (AOI) varies is provided. The optical lens assembly may include an optical stack, such as pancake optics. The optical lens assembly may also include a switchable optical element communicatively coupled to a controller. The optical lens assembly may further include an optical element, such as a Pancharatnam-Berry phase (PBP) lens, also known as a geometric phase lens (GPL). In some examples, the switchable optical element may be a switchable have wave plate, which may be configured, via application of optical power by the controller, so that the optical lens assembly may accept varying illumination ellipticity profiles as angle of incidence (AOI) increases.

公开(公告)号：US11520149B2

公开(公告)日：2022-12-06

申请号：US17006584

申请日：2020-08-28

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Yang Zhao ,  Douglas Robert Lanman

IPC: G02B27/01 ,  H04N9/31

Abstract: A display device includes a diffractive optical element and a tunable light source operable in different states including a first state and a second state. The tunable light source provides first light having a first wavelength while the tunable light source is in the first state and second light having a second wavelength, distinct from the first wavelength, while the tunable light source is in the second state. The first wavelength and the second wavelength correspond to a first color band. The diffractive optical element is positioned to receive and redirect the first light and receive and redirect the second light. The diffractive optical element has a first focal length for the first light and a second focal length, distinct from the first focal length, for the second light.

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：US11500217B2

公开(公告)日：2022-11-15

申请号：US16403140

申请日：2019-05-03

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Brian Wheelwright ,  Yang Zhao ,  Yusufu Njoni Bamaxam Sulai ,  Douglas Robert Lanman

IPC: G02B27/09 ,  G02B7/04 ,  G02B27/28 ,  G02F1/1335 ,  G02B27/01

Abstract: An optical lens assembly and an optical system is provided. The optical lens assembly includes a first optical element including a partial reflector and a quarter-wave plate and a second optical element including a reflective polarizer. The first optical element and the second optical element form a cavity. The pancake lens assembly further includes a varifocal lens having an adjustable optical power, and the varifocal lens is disposed inside or outside the cavity.

公开(公告)号：US11693265B2

公开(公告)日：2023-07-04

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

CPC classification number: G02F1/0136 ,  G02B27/0172 ,  G02F1/139 ,  G02F1/1347 ,  G02B2027/0178

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：US11686942B2

公开(公告)日：2023-06-27

申请号：US16730293

申请日：2019-12-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Yang Zhao ,  Afsoon Jamali ,  Junren Wang ,  Wai Sze Tiffany Lam ,  Lu Lu ,  Douglas Robert Lanman

IPC: G02F1/137 ,  G02B27/01 ,  G03B13/36

CPC classification number: G02B27/0172 ,  G02F1/13718 ,  G03B13/36

Abstract: A display system includes a source of unpolarized image light, and a stack of polarization-selective optical elements operable to switchably convert the unpolarized image light into two orthogonally polarized light beams, each of which being switchable in at least one beam characteristic. An output polarizer selects one of the two orthogonally polarized light beams for providing to a user. A depolarizer may be disposed between an electronic display emitting polarized light and the stack. The depolarizer may be in the form of an LC bilayer with randomized in-plane optic axis.