公开(公告)号：US20250164841A1

公开(公告)日：2025-05-22

申请号：US18947096

申请日：2024-11-14

Applicant: Japan Display Inc. ,  OSAKA UNIVERSITY

Inventor： Junji KOBASHI ,  Shinichiro OKA ,  Yoshinori TANAKA ,  Hiroyuki YOSHIDA

IPC: G02F1/1347 ,  G02F1/1335

Abstract: According to one embodiment, a liquid crystal optical element includes a transparent substrate, a liquid crystal layer provided above the transparent substrate, including a cholesteric liquid crystal, and configured to reflect first circularly polarized light having a same direction as a twist direction of the cholesteric liquid crystal, and a polarization control layer provided on the liquid crystal layer, and configured to control a polarization state of second circularly polarized light having a direction opposite to the first circularly polarized light, totally reflect the second circularly polarized light which passed through the liquid crystal layer and emit the light to the liquid crystal layer as the second circularly polarized light.

公开(公告)号：US20250149800A1

公开(公告)日：2025-05-08

申请号：US19002759

申请日：2024-12-27

Applicant: Japan Display Inc.

Inventor： Daiichi SUZUKI ,  Shinichiro OKA ,  Mitsutaka OKITA

IPC: H01Q15/14 ,  G02F1/1343

Abstract: A reflecting device includes a plurality of first patch electrodes, a plurality of second patch electrodes having a size different from a size of the first patch electrodes, a ground electrode opposing the plurality of first patch electrodes and the plurality of second patch electrodes and separated from the plurality of first patch electrodes and the plurality of second patch electrodes, and a liquid crystal layer between the plurality of first patch electrodes and the plurality of second patch electrodes and the ground electrode, wherein the plurality of first patch electrodes and the plurality of second patch electrodes are arranged alternately in a first direction or a second direction intersecting the first direction, and each first patch electrode is adjacent to each second patch electrode in the first direction or the second direction.

公开(公告)号：US20250149786A1

公开(公告)日：2025-05-08

申请号：US19003062

申请日：2024-12-27

Applicant: Japan Display Inc.

Inventor： Mitsutaka OKITA ,  Shinichiro OKA ,  Daiichi SUZUKI ,  Hiromi MATSUNO ,  Takuya OHTO ,  Yoshiaki AMANO

IPC: H01Q3/46

Abstract: A driving method of an intelligent reflecting surface having a plurality of reflecting elements arranged in a matrix, the method includes dividing the plurality of reflecting elements arranged in the matrix into a first region that controls an amount of phase change for each row of the plurality of reflecting elements arrayed in a row direction and a second region that controls an amount of phase change for every two adjacent rows of a plurality of reflecting elements arrayed in the row direction, and driving each of the plurality of reflecting elements belonging to the first region

公开(公告)号：US20250013102A1

公开(公告)日：2025-01-09

申请号：US18760488

申请日：2024-07-01

Applicant: Japan Display Inc.

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

IPC: G02F1/1337 ,  G02F1/13363

Abstract: According to one embodiment, a liquid crystal optical element includes a transparent substrate having a first main surface, an alignment control layer having a plurality of convex bodies, and a liquid crystal layer having a cholesteric liquid crystal. The alignment control layer has a first alignment area in which the convex bodies are arranged at a first pitch, and a second alignment area in which the convex bodies are arranged at a second pitch. The second pitch is less than the first pitch. The liquid crystal layer has a first liquid crystal area which overlaps the first alignment area, and a second liquid crystal area which overlaps the second alignment area.

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：US20240047890A1

公开(公告)日：2024-02-08

申请号：US18477602

申请日：2023-09-29

Applicant: Japan Display Inc.

Inventor： Shinichiro OKA ,  Mitsutaka OKITA ,  Daiichi SUZUKI ,  Shigesumi ARAKI ,  Yoshiaki AMANO ,  Hiromi MATSUNO

IPC: H01Q15/14 ,  H01Q21/06 ,  H01Q3/36

CPC classification number: H01Q15/148 ,  H01Q21/065 ,  H01Q3/36

Abstract: According to one embodiment, an intelligent reflecting surface includes a plurality of patch areas including a plurality of square patch electrodes, an electrode shape formed by the patch electrode, a first connection electrode, a second connection electrode, a third connection electrode, and a fourth connection electrode included in each of the plurality of patch areas has rotational symmetry having a point inside each of the plurality of patch areas as a center of rotation, and a first patch area, a second patch, a third patch area, and a fourth patch area have an intersection of the first patch area, the second patch area, the third patch area, and the fourth patch area as a whole as a center of rotation.

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：US20240036430A1

公开(公告)日：2024-02-01

申请号：US18362091

申请日：2023-07-31

Applicant: Japan Display Inc.

Inventor： Hiroumi KINJO ,  Koichi IGETA ,  Shinichiro OKA

IPC: G02F1/137 ,  G02F1/1337 ,  G02F1/1333 ,  G02F1/1335

CPC classification number: G02F1/13718 ,  G02F1/133761 ,  G02F1/133788 ,  G02F1/133757 ,  G02F1/133365 ,  G02F1/133536

Abstract: According to one embodiment, a method of manufacturing a liquid crystal element, includes forming an alignment layer on a support, forming a cholesteric liquid crystal layer containing a plasticizer and having elasticity on the alignment layer, adhering a flexible substrate to the cholesteric liquid crystal layer via a first adhesive layer, peeling the cholesteric liquid crystal layer adhered to the flexible substrate, off from the support and the alignment layer, adhering the cholesteric liquid crystal layer to a rigid substrate via a second adhesive layer and removing the flexible substrate and the first adhesive layer.