公开(公告)号：US20240045273A1

公开(公告)日：2024-02-08

申请号：US18363134

申请日：2023-08-01

Applicant: Japan Display Inc.

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

IPC: G02F1/1337 ,  G02F1/1347 ,  H01L31/054

CPC classification number: G02F1/133788 ,  G02F1/133726 ,  G02F1/13478 ,  H01L31/054

Abstract: According to one embodiment, a liquid crystal optical element includes a substrate, a first alignment control layer disposed on the substrate and comprising projections arranged at a predetermined pitch, and a first liquid crystal layer disposed on the first alignment control layer. The first liquid crystal layer comprises liquid crystal molecules which are aligned such that major axes of the liquid crystal molecules extend along the projections, respectively, and cured in a state where alignment directions of the liquid crystal molecules are fixed. The first alignment control layer is formed of a crosslinkable liquid crystal polymer.

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：US20220113460A1

公开(公告)日：2022-04-14

申请号：US17450479

申请日：2021-10-11

Applicant: Japan Display Inc.

Inventor： Shinichi KOMURA ,  Junji KOBASHI ,  Koichi OKUDA ,  Ken ONODA ,  Hiroaki KIJIMA

IPC: G02B5/30

Abstract: According to one embodiment, a display device includes a display panel configured to emit display light of linearly polarized light, a first semi-transparent element transmitting first circularly polarized light and reflecting second circularly polarized light, a first retardation film, a second semi-transparent element reflecting the first circularly polarized light and transmitting the second circularly polarized light, a second retardation film having a refractive anisotropy in which refractive indexes of directions orthogonal to each other in a plane are substantially equivalent to each other and a refractive index in a normal is different from a refractive index in a plane, and a first element having a lens action of condensing the second circularly polarized light.

公开(公告)号：US20240184028A1

公开(公告)日：2024-06-06

申请号：US18442385

申请日：2024-02-15

Applicant: Japan Display Inc.

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

IPC: G02B5/30

CPC classification number: G02B5/3016

Abstract: According to one embodiment, a liquid crystal optical element including a first substrate including a first transparent substrate, a first alignment film, and a first liquid crystal layer which includes first cholesteric liquid crystals, and which reflects part of light incident through the first transparent substrate toward the first transparent substrate, a second substrate including a second transparent substrate, a second alignment film, and a second liquid crystal layer which includes second cholesteric liquid crystals, and which reflects part of light transmitted through the first liquid crystal layer toward the first transparent substrate, and a transparent adhesive layer which adheres the first substrate and the second substrate.

公开(公告)号：US20240129430A1

公开(公告)日：2024-04-18

申请号：US18380435

申请日：2023-10-16

Applicant: JAPAN DISPLAY INC.

Inventor： Kazunari TOMIZAWA ,  Naoshi GOTO ,  Tsutomu HARADA ,  Junji KOBASHI

IPC: H04N7/14 ,  H04N23/57 ,  H04N23/611 ,  H04N23/90

CPC classification number: H04N7/144 ,  H04N23/57 ,  H04N23/611 ,  H04N23/90

Abstract: According to one embodiment, a display device includes a display panel having a display area where an image is displayed, a plurality of cameras provided at positions overlapping with the display area in plan view to capture a user opposed to the display device as a subject, a controller selecting one of the plurality of cameras as a camera to capture the subject, based on positions of eyes of a person included in the image displayed in the display area.

公开(公告)号：US20230408877A1

公开(公告)日：2023-12-21

申请号：US18460784

申请日：2023-09-05

Applicant: Japan Display Inc.

Inventor： Takeo KOITO ,  Junji KOBASHI

IPC: G02F1/1347 ,  G02F1/29 ,  G02F1/13363 ,  G02F1/1335

CPC classification number: G02F1/1347 ,  G02F1/292 ,  G02F1/13363 ,  G02F1/133536

Abstract: The display device includes an image display panel emitting linearly polarized light from a display area, a retardation plate on the image display panel, a variable phase difference element located on the retardation plate and providing phase difference to an incoming light, and a liquid crystal diffraction element on the variable phase difference element. The variable phase difference element is switchable between an on state, an off state, and an intermediate state, and the phase change of the intermediate state is smaller than the phase change of the on state. A first emission direction of a first emitted light in the on state, a second emission direction of a second emitted light in the off state, and a third emission direction of a third emitted light in the intermediate state are different from each other.

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：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：US20220299825A1

公开(公告)日：2022-09-22

申请号：US17655085

申请日：2022-03-16

Applicant: Japan Display Inc.

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

IPC: G02F1/1337

Abstract: According to one embodiment, a liquid crystal element includes a transparent substrate including a first main surface, a plurality of structures disposed on the first main surface and arranged along one direction, an alignment film disposed on a surface of each of the structures and a liquid crystal layer containing a cholesteric liquid crystal and in contact with the alignment film, and the helical axis of the cholesteric liquid crystal is inclined with respect to the first main surface, each of the plurality of structures includes a first surface inclined with respect to the first main surface, in the plurality of structures, the first surfaces are parallel to each other, and the alignment film is interposed between the first surface and the liquid crystal layer.