公开(公告)号：US12189268B2

公开(公告)日：2025-01-07

申请号：US17837751

申请日：2022-06-10

Applicant: Meta Platforms Technologies, LLC

Inventor： Gareth John Valentine ,  Zhimin Shi ,  Xi Wu

IPC: G02F1/35 ,  G02B6/12 ,  G02B27/01 ,  G02F1/39 ,  B82Y20/00 ,  G02F1/355

Abstract: According to examples, a tunable visible light source may include a periodically poled lithium niobate (PPLN) waveguide and a control mechanism to optimize the phase-matching of the PPLN waveguide in response to an input signal with a varied wavelength. The control mechanism may include an electro-optic (EO) tuning mechanism, a microheater-based thermo-optic (TO) control mechanism, and/or an acousto-optic (AO) control mechanism. The control mechanisms may, respectively, generate an electric field, heat, or an acoustic wave to affect a change in refractive index of the PPLN waveguide and thereby optimize the conversion efficiency to maximize the output power of the output wavelength of the PPLN waveguide as the input wavelength is tuned.

公开(公告)号：US20230400748A1

公开(公告)日：2023-12-14

申请号：US17837751

申请日：2022-06-10

Applicant: Meta Platforms Technologies, LLC

Inventor： Gareth John Valentine ,  Zhimin Shi ,  Xi Wu

IPC: G02F1/35 ,  G02F1/39 ,  G02B27/01 ,  G02B6/12

CPC classification number: G02F1/3546 ,  G02F1/395 ,  G02B27/0172 ,  G02B6/12009 ,  G02B2207/101 ,  B82Y20/00

Abstract: According to examples, a tunable visible light source may include a periodically poled lithium niobate (PPLN) waveguide and a control mechanism to optimize the phase-matching of the PPLN waveguide in response to an input signal with a varied wavelength. The control mechanism may include an electro-optic (EO) tuning mechanism, a microheater-based thermo-optic (TO) control mechanism, and/or an acousto-optic (AO) control mechanism. The control mechanisms may, respectively, generate an electric field, heat, or an acoustic wave to affect a change in refractive index of the PPLN waveguide and thereby optimize the conversion efficiency to maximize the output power of the output wavelength of the PPLN waveguide as the input wavelength is tuned.

公开(公告)号：US20240085740A1

公开(公告)日：2024-03-14

申请号：US18464338

申请日：2023-09-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Zhimin Shi ,  Xi Wu ,  James Ronald Bonar ,  Yun Wang ,  Edward Buckley

IPC: G02F1/1335 ,  F21V8/00

CPC classification number: G02F1/133614 ,  G02B6/0001

Abstract: In some examples, an apparatus may include a backlight unit (BLU) including an electronic integrated circuit layer, a photonic integrated circuit layer, a color conversion module, and a display interface layer. In some examples, a BLU may include at least one laser or may be configured to receive laser light from at least one external laser source. Laser light may be transmitted towards a portion of the display interface layer using the photonic integrated circuit. Color conversion modules may be used to convert the laser light into one or more desired colors. Example apparatus may be used in head-mounted devices such as augmented reality and/or virtual reality devices. Other devices, methods, systems, and computer-readable media are also disclosed.

公开(公告)号：US20240077779A1

公开(公告)日：2024-03-07

申请号：US18462265

申请日：2023-09-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Xi Wu ,  Olga Vladimirovna Barykina-Tassa ,  Arman Boromand ,  Afsoon Jamali ,  Frank Leard ,  Jonathan William Onorato ,  Gareth Valentine

IPC: G02F1/155 ,  G02F1/1523

CPC classification number: G02F1/155 ,  G02F1/1525 ,  G02F2001/1557

Abstract: An optical device includes a first set of one or more electrodes, a second set of one or more electrodes distinct and separate from the first set of one or more electrodes, and a solution containing transparent metal ions in a liquid or gel electrolyte. The solution is located between the first set of one or more electrodes and the second set of one or more electrodes. The optical device may operate as an optical dimming device, which may be used in head-mounted display devices or as dimmable windows or shutters.

公开(公告)号：US12216357B2

公开(公告)日：2025-02-04

申请号：US18464338

申请日：2023-09-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Zhimin Shi ,  Xi Wu ,  James Ronald Bonar ,  Yun Wang ,  Edward Buckley

IPC: G02F1/1335 ,  F21V8/00

Abstract: In some examples, an apparatus may include a backlight unit (BLU) including an electronic integrated circuit layer, a photonic integrated circuit layer, a color conversion module, and a display interface layer. In some examples, a BLU may include at least one laser or may be configured to receive laser light from at least one external laser source. Laser light may be transmitted towards a portion of the display interface layer using the photonic integrated circuit. Color conversion modules may be used to convert the laser light into one or more desired colors. Example apparatus may be used in head-mounted devices such as augmented reality and/or virtual reality devices. Other devices, methods, systems, and computer-readable media are also disclosed.

公开(公告)号：US20240094584A1

公开(公告)日：2024-03-21

申请号：US18461231

申请日：2023-09-05

Applicant: Meta Platforms Technologies, LLC

Inventor： Chenrun Feng ,  Olga Vladimirovna Barykina-Tassa ,  Afsoon Jamali ,  Jonathan William Onorato ,  Jasmine Soria Sears ,  Gareth Valentine ,  Xi Wu

IPC: G02F1/135 ,  C09K19/58 ,  G02F1/137

CPC classification number: G02F1/1357 ,  C09K19/582 ,  G02F1/135 ,  G02F1/137 ,  G02F2202/06

Abstract: An optical device includes a first electrode and a medium that includes ferroelectric liquid crystals and chiral dopants. The medium is located adjacent to the first electrode. The optical device may also include a second electrode distinct and separate from the first electrode. The optical device may be used as an optical dimming device, controlling an amount light passing through the optical device based on a voltage gradient provided to the optical device.