公开(公告)号：US20180164480A1

公开(公告)日：2018-06-14

申请号：US15579158

申请日：2016-06-01

Applicant: OSAKA UNIVERSITY

Inventor： Hiroyuki YOSHIDA

IPC: G02B5/30 ,  G02B5/10 ,  G02F1/139 ,  G02B5/02 ,  F21V8/00

CPC classification number: G02B5/3016 ,  G02B5/0252 ,  G02B5/08 ,  G02B5/10 ,  G02B6/0055 ,  G02F1/137 ,  G02F1/1396 ,  G02F2001/133543

Abstract: A liquid crystal element (1) includes helical structures (7). The liquid crystal element (1) has a light incidence surface (13) on which light is incident and a reflective surface (17) which reflects the light coming through the light incidence surface (13). Each helical structure (7) includes structure units (9). Each structure unit (9) includes liquid crystal molecules (11) stacked in a twisted manner to form a helix. A second end (E2) of one structure unit (9) of structure units (9) adjacent to one another in a first direction (A1) serves as a first end (E1) of the other structure unit (9). Directions of orientation of the liquid crystal molecules (11) at the first ends (E1) included in the helical structures (7) are identical. The reflective surface (17) includes at least one of the first ends (E1) included in each helical structure (7). The reflective surface (17) is non-parallel to the light incidence surface (13).

公开(公告)号：US20250053047A1

公开(公告)日：2025-02-13

申请号：US18720886

申请日：2022-12-20

Applicant: OSAKA UNIVERSITY

Inventor： Hiroyuki YOSHIDA

IPC: G02F1/1347 ,  G02F1/1334 ,  G02F1/1343

Abstract: A liquid crystal element (100) includes a first electrode (20), a first liquid crystal layer (40), a second electrode (50), a second liquid crystal layer (70), and a third electrode (80). The first electrode (20) has light transmittance. The first liquid crystal layer (40) contains first macromolecules and a plurality of first liquid crystal molecules. The second electrode (50) has light transmittance. The second liquid crystal layer (70) contains second macromolecules and a plurality of second liquid crystal molecules. The first liquid crystal layer (40) is placed between the first electrode (20) and the second electrode (50). The second liquid crystal layer (70) is placed between the second electrode (50) and the third electrode (80). The first macromolecules form a three-dimensional network structure in the first liquid crystal layer (40). The second macromolecules form a three-dimensional network structure in the second liquid crystal layer (70).

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：US20230335660A1

公开(公告)日：2023-10-19

申请号：US17757987

申请日：2020-12-25

Applicant: OSAKA UNIVERSITY

Inventor： Hiroyuki YOSHIDA

IPC: H01L31/054

CPC classification number: H01L31/0547

Abstract: A solar cell device (100) includes an optical waveguide section (1), a solar cell (5), and a light diffracting section (3). The light diffracting section (3) is disposed in a different layer level from the optical waveguide section (1) and is opposite to the optical waveguide section (1). The light diffracting section (3) diffracts light (LT2) in at least a portion of a wavelength band of light (LT1) incident to the light diffracting section (3) toward the optical waveguide section (1) and allows the light (LT2) in at least the portion of the wavelength band to enter the optical waveguide section (1). The optical waveguide section (1) guides the light (LT2) diffracted by the light diffracting section (3) and entering inside the optical waveguide section (1). The solar cell (5) receives the light (LT2) guided by the optical waveguide section (1) and converts energy of the light (LT2) to electrical power.

公开(公告)号：US20230261129A1

公开(公告)日：2023-08-17

申请号：US18304968

申请日：2023-04-21

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

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

IPC: H01L31/054 ,  G02B1/14 ,  G02B5/20 ,  G02B6/42

CPC classification number: H01L31/0547 ,  G02B1/14 ,  G02B5/208 ,  G02B6/42 ,  G02B6/4214

Abstract: According to one embodiment, a photovoltaic cell device includes an optical waveguide including a first main surface, a second main surface opposed to the first main surface, and a side surface, an optical element opposed to the second main surface, containing cholesteric liquid crystal, and reflecting at least a part of incident light via the optical waveguide toward the optical waveguide, a photovoltaic cell opposed to the side surface, and a protective film, and the protective film is provided to be in contact with the first main surface.

公开(公告)号：US20220120942A1

公开(公告)日：2022-04-21

申请号：US17646582

申请日：2021-12-30

Applicant: OSAKA UNIVERSITY

Inventor： Giichi SHIBUYA ,  Hiroyuki YOSHIDA ,  Masanori OZAKI

IPC: G02B3/08 ,  G02F1/1343 ,  G02B3/10 ,  G02F1/13 ,  G02C7/00 ,  G02F1/1333 ,  G02F1/1347 ,  G02F1/29 ,  G02F1/133 ,  G02C7/04 ,  G02F1/137

Abstract: A liquid crystal element (100) refracts and outputs light. The liquid crystal element (100) includes a first electrode (1), a second electrode (2), an insulating layer (21) that is an electric insulator, a resistance layer (22), a liquid crystal layer (23) including liquid crystal, and a third electrode (3). The insulating layer (21) is disposed between each location of the first and second electrodes (1) and (2) and the resistance layer (22) to insulate the first and second electrodes (1) and (2) from the resistance layer (22). The resistance layer (22) has an electrical resistivity higher than that of the first electrode (1) and lower than that of the insulating layer (21). The resistance layer (22) and the liquid crystal layer (23) are disposed between the insulating layer (21) and the third electrode (3). The resistance layer (22) is disposed between the insulating layer (21) and the liquid crystal layer (23). The insulating layer (21) has a thickness (ts) smaller than a thickness (th) of the resistance layer (22).

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.