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：US20240353707A1

公开(公告)日：2024-10-24

申请号：US18302556

申请日：2023-04-18

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui CHENG ,  Michael ESCUTI ,  Xiayu FENG ,  Mengfei WANG ,  Steven John ROBBINS ,  Zhexin ZHAO ,  Lu LU

IPC: G02F1/1335 ,  G02F1/13363 ,  G02F1/1337 ,  G02F1/137 ,  G03H1/02

CPC classification number: G02F1/133524 ,  G02F1/133507 ,  G02F1/13355 ,  G02F1/133636 ,  G02F1/133757 ,  G02F1/13706 ,  G03H1/0248

Abstract: A device is provided. The device includes a light guide configured to guide a first light propagating therein. The device also includes an optical film coupled with the light guide, optically anisotropic molecules in the optical film being configured with an in-plane orientation pattern having an in-plane pitch along the predetermined in-plane direction. Within the in-plane pitch of the in-plane orientation pattern, azimuthal angles of the optically anisotropic molecules are configured to vary nonlinearly along the predetermined in-plane direction. The optical film is configured to diffract the first light as a plurality of second lights at a plurality of locations of the optical film, with a plurality of predetermined, different diffraction efficiencies.

公开(公告)号：US20240302697A1

公开(公告)日：2024-09-12

申请号：US18119911

申请日：2023-03-10

Applicant: Meta Platforms Technologies, LLC

Inventor： Sawyer MILLER ,  Hsien-Hui CHENG ,  Brian DAUGHERTY ,  Hannah NOBLE ,  Michael ESCUTI ,  Lu LU

IPC: G02F1/13363 ,  G02F1/1334 ,  G02F1/1335

CPC classification number: G02F1/133638 ,  G02F1/1334 ,  G02F1/133526 ,  G02F1/133636 ,  G02B27/0172

Abstract: An achromatic wave plate using multiple twisted nematic liquid crystal polymer films or negative dispersion A-plate films is described. Each layer of twisted nematic liquid crystal polymer film aligns a next layer during forming achieving a monolithic structure. The achromatic wave plate with multiple layers of negative dispersion A-plate material has a non-continuous, easy to fabricate structure. Both types of films may be flexible and allow application to curved surfaces. The films of both examples also allow for high achromaticity in forward and backward propagation, thus, permitting the wave plate to operate as an optical isolator. A quarter wave of retardance across the entire visible spectrum and up to a 30-degree angle of incidence may be achieved.

公开(公告)号：US20240272473A1

公开(公告)日：2024-08-15

申请号：US18169872

申请日：2023-02-15

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui CHENG ,  Sawyer MILLER ,  Xiayu FENG ,  Mengfei WANG ,  Yuge HUANG ,  Michael ESCUTI

IPC: G02F1/1335 ,  G02B5/32 ,  G02F1/13363 ,  G02F1/1337

CPC classification number: G02F1/133543 ,  G02B5/32 ,  G02F1/133636 ,  G02F1/133637 ,  G02F1/133776

Abstract: A device is provided. The device includes an optical film including optically anisotropic molecules configured to form a plurality of helical structures with a plurality of helical axes and a helical pitch. The helical pitch is a distance along a helical axis over which an azimuthal angle of an optically anisotropic molecule vary by a predetermined value. Over the helical pitch of a helical structure, the azimuthal angle of the optically anisotropic molecule is configured to vary nonlinearly with respect to a distance from a starting point of the helical pitch to a local point at which the optically anisotropic molecule is located along the helical axis.