公开(公告)号：US20250052937A1

公开(公告)日：2025-02-13

申请号：US18795401

申请日：2024-08-06

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

Inventor： Koichi IGETA ,  Junji KOBASHI ,  Yasushi TOMIOKA ,  Shinichiro OKA ,  Hiroyuki YOSHIDA

IPC: G02B5/30 ,  C09K19/30 ,  C09K19/36 ,  C09K19/50

Abstract: According to one embodiment, a liquid crystal optical element includes a transparent substrate, and a liquid crystal layer which faces the transparent substrate and has a cholesteric liquid crystal and an additive exhibiting liquid crystallinity. Refractive anisotropy of the additive is less than refractive anisotropy of the liquid crystal layer.

公开(公告)号：US20240176193A1

公开(公告)日：2024-05-30

申请号：US18431141

申请日：2024-02-02

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

Inventor： Koichi IGETA ,  Shinichiro OKA ,  Yasushi TOMIOKA ,  Junji KOBASHI ,  Hiroyuki YOSHIDA

IPC: G02F1/1347 ,  G02F1/01 ,  G02F1/1337 ,  G02F1/137

CPC classification number: G02F1/1347 ,  G02F1/011 ,  G02F1/133711 ,  G02F1/13718 ,  G02F2201/50

Abstract: According to one embodiment, a liquid crystal optical element includes an optical waveguide including a first main surface and a second main surface opposed to the first main surface, a first alignment film disposed on the second main surface, a first liquid crystal layer which overlaps the first alignment film, which comprises a first cholesteric liquid crystal, and which reflects at least part of light incident through the optical waveguide toward the optical waveguide, a second alignment film which overlaps the first liquid crystal layer, and a second liquid crystal layer which overlaps the second alignment film, which comprises a second cholesteric liquid crystal, and which reflects at least part of light incident through the optical waveguide toward the optical waveguide.

公开(公告)号：US20230375874A1

公开(公告)日：2023-11-23

申请号：US18318122

申请日：2023-05-16

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

Inventor： Koichi IGETA ,  Yasushi TOMIOKA ,  Shinichiro OKA ,  Hiroyuki YOSHIDA

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

CPC classification number: G02F1/133543 ,  G02F1/133703 ,  G02F1/133636

Abstract: According to one embodiment, a liquid crystal optical element comprises a transparent substrate comprising a first main surface and a second main surface opposed to the first main surface, an alignment film disposed on the second main surface, and a liquid crystal layer overlapping the alignment film and comprising a cholesteric liquid crystal and an additive exhibiting a liquid crystalline property. Refractive anisotropy of the additive is greater than refractive anisotropy of the liquid crystal layer.

公开(公告)号：US20230375764A1

公开(公告)日：2023-11-23

申请号：US18319000

申请日：2023-05-17

Applicant: Japan Display Inc. ,  Osaka University

Inventor： Koichi IGETA ,  Shinichiro OKA ,  Yasushi TOMIOKA ,  Hiroyuki YOSHIDA

IPC: G02B5/30 ,  G02B5/18 ,  C09K19/36 ,  C09K19/54

CPC classification number: G02B5/3016 ,  G02B5/1833 ,  G02B5/1857 ,  C09K19/36 ,  C09K19/54

Abstract: According to one embodiment, a liquid crystal optical element includes a transparent substrate including a main surface, an alignment film disposed on the main surface, and a liquid crystal layer overlapping the alignment film and including a cholesteric liquid crystal including liquid crystal molecules stacked helically and an additive exhibiting a liquid crystalline property. In the liquid crystal layer, a reflective surface along which alignment directions of the liquid crystal molecules are identical is inclined with respect to the main surface.

公开(公告)号：US20240377681A1

公开(公告)日：2024-11-14

申请号：US18660333

申请日：2024-05-10

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

Inventor： Koichi IGETA ,  Ayaka HIGUCHI ,  Junji KOBASHI ,  Yasushi TOMIOKA ,  Shinichiro OKA ,  Hiroyuki YOSHIDA

IPC: G02F1/1337 ,  G02F1/1335

Abstract: According to one embodiment, an alignment processing device includes a light source, a polarizing beam splitter, a first optical system, a second optical system, a first retardation film, a second retardation film, a moving mechanism configured to move a processing substrate in which a thin film is formed, and a controller. Interfering light is formed in an exposure area by first circularly polarized light and second circularly polarized light. The controller performs control so as to repeat a process of exposing part of an area of the thin film by the interfering light and a process of moving the processing substrate.

公开(公告)号：US20240192417A1

公开(公告)日：2024-06-13

申请号：US18431331

申请日：2024-02-02

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

Inventor： Koichi IGETA ,  Yasushi TOMIOKA ,  Shinichiro OKA ,  Junji KOBASHI ,  Hiroyuki YOSHIDA

IPC: G02B5/30

CPC classification number: G02B5/3016

Abstract: According to one embodiment, a liquid crystal optical element includes an optical waveguide including a first main surface and a second main surface opposed to the first main surface, an alignment film disposed on the second main surface, a liquid crystal layer which overlaps the alignment film, which includes cholesteric liquid crystals, and which reflects at least part of light incident through the optical waveguide toward the optical waveguide, and a transparent first cover member opposed to the liquid crystal layer with a first low-refractive-index layer interposed between the first cover member and the liquid crystal layer, the first low-refractive-index layer having a refractive index lower than a refractive index of the liquid crystal layer.

公开(公告)号：US20240176074A1

公开(公告)日：2024-05-30

申请号：US18430928

申请日：2024-02-02

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

Inventor： Koichi IGETA ,  Shinichiro OKA ,  Yasushi TOMIOKA ,  Junji KOBASHI ,  Hiroyuki YOSHIDA

IPC: G02B6/27

CPC classification number: G02B6/2726

Abstract: According to one embodiment, a liquid crystal optical element includes an optical waveguide including a first main surface and a second main surface opposed to the first main surface, an alignment film disposed on the second main surface, a liquid crystal layer which overlaps the alignment film, which includes cholesteric liquid crystals, and which reflects at least part of light incident through the optical waveguide toward the optical waveguide, and a transparent first protective layer which overlaps the liquid crystal layer, and which is formed of a water-soluble polymer or a fluorine-based resin.

公开(公告)号：US20230408743A1

公开(公告)日：2023-12-21

申请号：US18331389

申请日：2023-06-08

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

Inventor： Ayaka HIGUCHI ,  Koichi IGETA ,  Shinichiro OKA ,  Yasushi TOMIOKA ,  Hiroyuki YOSHIDA

IPC: G02B5/30

CPC classification number: G02B5/3016

Abstract: According to one embodiment, a liquid crystal optical element includes a first liquid crystal layer including a first cholesteric liquid crystal and a second liquid crystal layer including a second cholesteric liquid crystal, a helical pitch of each of the first cholesteric liquid crystal and the second cholesteric liquid crystal changing continuously. The first cholesteric liquid crystal including a first portion having a first helical pitch and a second portion having a second helical pitch different from the first helical pitch. The second cholesteric liquid crystal including a third portion having a third helical pitch and a fourth portion having a fourth helical pitch different from the third helical pitch.

公开(公告)号：US20250068010A1

公开(公告)日：2025-02-27

申请号：US18808373

申请日：2024-08-19

Applicant: Japan Display Inc.

Inventor： Koichi IGETA ,  Kasumi HASE ,  Yoshiro AOKI

IPC: G02F1/1335 ,  G02F1/1339

Abstract: A liquid crystal panel has a hole allowing light to pass through or to be shielded, and suppresses an influence on the light passing through the hole. A liquid crystal panel includes: a first substrate having a flat plate shape; a second substrate arranged to face the first substrate; a light shielding film spreading along an inner surface of the second substrate and having the hole formed therein; a plurality of spacers arranged on an outer side of a region between the substrates, the region corresponding to the hole; and a liquid crystal sandwiched between the first substrate and the second substrate. The second substrate is held such that a distance from the first substrate becomes larger as coming closer to the hole, and the portion corresponding to the hole has a shape protruding in a direction extending from the first substrate to the second substrate.

公开(公告)号：US20240045274A1

公开(公告)日：2024-02-08

申请号：US18366099

申请日：2023-08-07

Applicant: Japan Display Inc.

Inventor： Koichi IGETA ,  Tenfu NAKAMURA ,  Kentaro OKUYAMA

IPC: G02F1/1339 ,  G02F1/1362 ,  G02F1/1334 ,  G02F1/1333

CPC classification number: G02F1/1339 ,  G02F1/136286 ,  G02F1/1334 ,  G02F1/133305

Abstract: According to one embodiment, a display device includes a first substrate, a second substrate opposed to the first substrate, a sealing member bonding the first substrate with the second substrate, and a liquid crystal layer between the first substrate and the second substrate. From an aspect, the sealing member includes a first sealing member surrounding a display area including a plurality of pixels, and a second sealing member formed of a same material as the first sealing member and arranged in the display area.