公开(公告)号：US20240231178A9

公开(公告)日：2024-07-11

申请号：US18396569

申请日：2023-12-26

Applicant: OSAKA UNIVERSITY

Inventor： Giichi SHIBUYA ,  Sunri LEE ,  Hiroyuki YOSHIDA ,  Masanori OZAKI

IPC: G02F1/29 ,  G02B3/14

CPC classification number: G02F1/294 ,  G02B3/14

Abstract: A liquid crystal element is provided that can inhibit occurrence of voltage drop between one end and the other end of each electrode. A liquid crystal element (100) includes a liquid crystal layer LQ, a plurality of first arcuate electrodes (1), and a plurality of second arcuate electrodes (2). The first arcuate electrodes (1) are disposed concentrically about an optical axis (AX) of the liquid crystal element (100) and applies first voltage (Vi) to the liquid crystal layer (LQ). The second arcuate electrodes (2) are disposed concentrically about the optical axis (AX) and applies second voltage (V2) to the liquid crystal layer (LQ).

公开(公告)号：US20220365383A1

公开(公告)日：2022-11-17

申请号：US17620349

申请日：2019-06-18

Applicant: OSAKA UNIVERSITY

Inventor： Sunri LEE ,  Giichi SHIBUYA ,  Hiroyuki YOSHIDA ,  Masanori OZAKI

IPC: G02F1/1339 ,  G02F1/1337

Abstract: A liquid crystal element (100) includes a plurality of unit electrodes (10), a liquid crystal layer (LQ), and a plurality of wall members (WL). Each of the unit electrodes (10) includes a first electrode (1) and a second electrode (2). A voltage is applied to the liquid crystal layer (LQ) from each of the unit electrodes (10). The wall members (WL) are arranged in the liquid crystal layer (LQ). The liquid crystal layer (LQ) has a waveform retardation (RT). Two or more of a plurality of peaks (P1) in the retardation (RT) correspond to positions of respective wall members (WL).

公开(公告)号：US20230246590A1

公开(公告)日：2023-08-03

申请号：US18193726

申请日：2023-03-31

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

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

IPC: H02S40/22 ,  G02B5/30

CPC classification number: H02S40/22 ,  G02B5/3016

Abstract: According to one embodiment, a solar power generation apparatus includes an optical waveguide that includes a first main surface, a second main surface, and a lower side surface, an optical element that faces the second main surface, includes cholesteric liquid crystal, and reflects at least a part of ultraviolet ray of incident light from the first main surface toward the optical waveguide, and a solar cell that faces the lower side surface. The optical element includes a reflective surface angled with respect to a boundary surface between the optical waveguide and the optical element. An inclination angle of the reflective surface with respect to the boundary surface is an acute angle toward the solar cell.

公开(公告)号：US20230176446A1

公开(公告)日：2023-06-08

申请号：US17604986

申请日：2020-04-17

Applicant: OSAKA UNIVERSITY

Inventor： Giichi SHIBUYA ,  Sunri LEE ,  Hiroyuki YOSHIDA ,  Masanori OZAKI

IPC: G02F1/29 ,  G02B3/14

CPC classification number: G02F1/294 ,  G02B3/14

Abstract: A liquid crystal element is provided that can inhibit occurrence of voltage drop between one end and the other end of each electrode. A liquid crystal element (100) includes a liquid crystal layer LQ, a plurality of first arcuate electrodes (1), and a plurality of second arcuate electrodes (2). The first arcuate electrodes (1) are disposed concentrically about an optical axis (AX) of the liquid crystal element (100) and applies first voltage (V1) to the liquid crystal layer (LQ). The second arcuate electrodes (2) are disposed concentrically about the optical axis (AX) and applies second voltage (V2) to the liquid crystal layer (LQ).

公开(公告)号：US20230146964A1

公开(公告)日：2023-05-11

申请号：US18091384

申请日：2022-12-30

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

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

IPC: H01L31/054 ,  G02F1/133 ,  G02F1/137

CPC classification number: H01L31/0547 ,  G02F1/13324 ,  G02F1/13718

Abstract: According to one embodiment, a photovoltaic cell device includes an optical waveguide, an optical element, and a photovoltaic cell. The optical element includes a first liquid crystal layer which contains a cholesteric liquid crystal, reflects, of visible light, circularly polarized light of one of first circularly polarized light and second circularly polarized light rotating in an opposite direction of the first circularly polarized light toward the optical waveguide and the photovoltaic cell, and transmits the other circularly polarized light. The first liquid crystal layer reflects one of the first circularly polarized light and the second circularly polarized light of part of wavelength ranges.

公开(公告)号：US20230136958A1

公开(公告)日：2023-05-04

申请号：US18091387

申请日：2022-12-30

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

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

IPC: H01L31/054 ,  G02B6/42

Abstract: According to one embodiment, a photovoltaic cell device includes a first optical waveguide including a first main surface, a second main surface facing the first main surface, and a first side surface, an optical element facing the second main surface, containing a cholesteric liquid crystal, and reflecting at least part of light incident on the first main surface toward the first optical waveguide, and a first photovoltaic cell facing the first side surface. The first photovoltaic cell is attached to the first side surface by a transparent first adhesive layer.

公开(公告)号：US20220057676A1

公开(公告)日：2022-02-24

申请号：US17299710

申请日：2019-11-28

Applicant: OSAKA UNIVERSITY

Inventor： Hiroyuki YOSHIDA ,  SeongYong CHO ,  Masanori OZAKI

IPC: G02F1/1335 ,  G02F1/137 ,  G02F1/13357 ,  F21V8/00

Abstract: A display device includes an optical waveguide layer, a variable refractive index layer, and an optical layer. The refractive index of the variable refractive index layer changes in response to application of a drive voltage. The optical layer reflects or absorbs light. The variable refractive index layer reflects the light to be guided through the optical waveguide layer 11 toward the inside of the optical waveguide layer depending on the refractive index of the variable refractive index layer to allow the optical waveguide layer to guide the reflected light. The variable refractive index layer introduces the light to be guided through the optical waveguide layer into the variable refractive index layer depending on the refractive index of the variable refractive index layer and emits the introduced light out of the variable refractive index layer. The optical layer reflects or absorbs the light emitted from the variable refractive index layer.

公开(公告)号：US20190187339A1

公开(公告)日：2019-06-20

申请号：US16318803

申请日：2017-07-11

Applicant: OSAKA UNIVERSITY

Inventor： Giichi SHIBUYA ,  Hiroyuki YOSHIDA ,  Masanori OZAKI

IPC: G02B3/08 ,  G02B3/10 ,  G02C7/04 ,  G02F1/1343 ,  G02F1/137

CPC classification number: G02B3/08 ,  G02B3/10 ,  G02C7/00 ,  G02C7/041 ,  G02F1/13 ,  G02F1/133 ,  G02F1/133345 ,  G02F1/1343 ,  G02F1/1347 ,  G02F1/137 ,  G02F1/29 ,  G02F2001/294 ,  G02F2201/122

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：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：US20200271842A1

公开(公告)日：2020-08-27

申请号：US16463676

申请日：2017-11-15

Applicant: OSAKA UNIVERSITY

Inventor： Hiroyuki YOSHIDA

IPC: G02B5/30 ,  G02B5/18 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/29

Abstract: An optical element 1 includes a first layer (A1) and a second layer (A2) that faces the first layer (A1). The first layer (A1) includes a plurality of first structural bodies (B1) that each have optical anisotropy. In reflection of light entering from the first layer (A1), the second layer (A2) reflects the light while maintaining a polarization state of the light at incidence and at the reflection. The first layer (A1) changes, according to directions of orientation of the first structural bodies (B1), a phase of the light from a phase at incidence to the first layer (A1) from outside of the first layer (A1) to a phase at output from the first layer (A1) toward the second layer (A2). The first layer (A1) changes the phase of the light from a phase at incidence to the first layer (A1) from the second layer (A2) to a phase at output from the first layer (A1) toward the outside of the first layer (A1) according to the directions of orientation of the first structural bodies (B1).