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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.
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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
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.
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公开(公告)号：US20230258849A1
公开(公告)日：2023-08-17
申请号：US18304810
申请日：2023-04-21
Applicant: Japan Display Inc. , OSAKA UNIVERSITY
Inventor： Shinichiro OKA , Yasushi TOMIOKA , Junji KOBASHI , Hiroyuki YOSHIDA
CPC classification number: G02B5/1833 , G02B5/3016 , G02B5/208
Abstract: According to one embodiment, a liquid crystal optical element includes a substrate, a first alignment film, a second alignment film opposite to the first alignment film, a spacer between the substrate and the second alignment film, and a liquid crystal layer in contact with the first alignment film and the second alignment film. The liquid crystal layer includes liquid crystal molecules including a plurality of first liquid crystal molecules arranged along a boundary surface with the first alignment film and a plurality of second liquid crystal molecules arranged along a boundary surface with the second alignment film, and is cured in a state where alignment directions of the liquid crystal molecules are fixed.
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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
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).
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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).
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Patent Agency Ranking
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
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).
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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.
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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).
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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).
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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
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).
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