公开(公告)号：US20240168433A1

公开(公告)日：2024-05-23

申请号：US18105223

申请日：2023-02-02

Applicant: Meta Platforms Technologies, LLC

Inventor： Changwon Jang ,  Afsoon Jamali ,  Zhimin Shi

IPC: G03H1/22 ,  G02B27/00 ,  G02B27/01 ,  G02F1/1335 ,  G06F1/16

CPC classification number: G03H1/2286 ,  G02B27/0093 ,  G02B27/0172 ,  G02F1/1335 ,  G03H1/2294 ,  G06F1/163 ,  G02B2027/0174 ,  G03H2001/0224 ,  G03H2223/16 ,  G03H2223/23 ,  G03H2223/24 ,  G03H2225/34

Abstract: A holographic display includes an illuminator, a spatial light modulator (SLM) coupled to the illuminator, and an ocular lens coupled to the SLM. The illuminator provides a wide-area illuminating light beam to illuminate the SLM with a spatially homogeneous beam of light. The illuminator may include a slab waveguide with an evanescent out-coupler, or a beam expander based on a diffraction grating with an oblique angle of incidence and a near-normal angle of diffraction of the illuminating light. A low-pass spatial filter may be provided to filter out higher diffraction orders of the illuminating light diffracted on the SLM.

公开(公告)号：US20240168290A1

公开(公告)日：2024-05-23

申请号：US18105218

申请日：2023-02-02

Applicant: Meta Platforms Technologies, LLC

Inventor： Changwon Jang ,  Afsoon Jamali ,  Zhimin Shi

IPC: G02B27/01 ,  G02F1/1335 ,  G02F1/1343 ,  G03H1/22 ,  G06F1/16

CPC classification number: G02B27/0172 ,  G02F1/1335 ,  G02F1/134363 ,  G03H1/2286 ,  G03H1/2294 ,  G06F1/163 ,  G02B27/0093 ,  G02B2027/0174

Abstract: A holographic display includes an illuminator, a spatial light modulator (SLM) coupled to the illuminator, and an ocular lens coupled to the SLM. The SLM includes sequentially coupled first and second pixelated SLM panels for spatially modulating the illuminating light beam in amplitude and phase. At least one of the SLM panels may include a liquid crystal (LC) panel, such as an in-plane switching (IPS) panel. At least one of the SLM panels may include an array of piston-type micromirrors.

公开(公告)号：US20240126134A1

公开(公告)日：2024-04-18

申请号：US18485498

申请日：2023-10-12

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Changwon Jang ,  Zhimin Shi ,  Sho Nakahara ,  Eric Stratton

IPC: G02F1/29

CPC classification number: G02F1/29 ,  G02F2201/122

Abstract: The disclosed system may include at least one gradient-index liquid crystal lens. The system may include a selection module that selects a viewing angle. The system may also include an adjustment module that dynamically adjusts a phase reset property of the gradient-index liquid crystal lens in response to the selected viewing angle. Various other devices, systems, and methods are also disclosed.

公开(公告)号：US20230418105A1

公开(公告)日：2023-12-28

申请号：US18076223

申请日：2022-12-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Zhimin Shi ,  Jian Xu ,  Yijing Fu

IPC: G02F1/1335 ,  G02F1/13357 ,  F21V8/00

CPC classification number: G02F1/133607 ,  G02B6/0008 ,  G02B6/0006 ,  G02F1/133621

Abstract: A lighting unit for a display panel includes a light distribution module, an array of out-couplers, and a beam spot array generation module. The light distribution module includes a plurality of output waveguides for configurably distributing illuminating light between the output waveguides. Each out-coupler is coupled to an output waveguide and configured to out-couple a portion of the illuminating light to propagate towards the display panel. The beam spot array generation module is configured to receive portions of the illuminating light out-coupled by out-couplers of the array of out-couplers and to convert each portion to illuminate a zone of the display panel with an illuminating light field comprising an array of light spots. Each light spot is configured for illuminating an individual pixel or sub-pixel of the zone of the display panel.

公开(公告)号：US20230396744A1

公开(公告)日：2023-12-07

申请号：US17834731

申请日：2022-06-07

Applicant: Meta Platforms Technologies, LLC

Inventor： Zhimin Shi ,  Chloe Astrid Marie Fabien ,  Wanli Chi

IPC: H04N9/31 ,  G02B27/01 ,  G02B6/124

CPC classification number: H04N9/3129 ,  G02B27/0172 ,  H04N9/3155 ,  H04N9/3158 ,  G02B6/124

Abstract: A display device may include a projector coupled to volume Bragg grating (VBG) based pupil-replicating lightguide. The projector may be a scanning projector or a display panel based projector. A lighting unit for the display panel may have spatially variant spectral composition selected to match angular and wavelength selectivity of the VBGs of the pupil-replicating lightguide, thereby improving light utilization efficiency of the display device. In scanning projector implementations, the center wavelength of the scanned light beam may be varied in coordination with the scanning, to achieve the same effect.

公开(公告)号：US11727891B2

公开(公告)日：2023-08-15

申请号：US17528036

申请日：2021-11-16

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Zhimin Shi ,  James Ronald Bonar ,  Fenglin Peng ,  Ying Geng

IPC: G09G3/36 ,  G09G3/34 ,  F21V8/00 ,  G02F1/1335

CPC classification number: G09G3/3473 ,  G02B6/005 ,  G09G3/3406 ,  G09G3/36 ,  G02F1/133512 ,  G09G2300/0426 ,  G09G2320/0209

Abstract: In various embodiments, an apparatus comprises a composite backplane that modulates light from a light source, where the composite backplane comprises an electronics layer disposed on a substrate, a photonics integrated circuit (IC) layer disposed on the electronics layer that causes light from the light source to propagate in a first direction, and an active light modulation (ALM) interface layer disposed on the photonics IC layer controls an ALM interface layer in order to control the light propagating in the first direction.