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公开(公告)号：US11281066B2
公开(公告)日：2022-03-22
申请号：US16660901
申请日：2019-10-23
Applicant: TIANMA JAPAN, LTD.
Inventor： Kunihiro Shiota , Ken Sumiyoshi , Masanori Shirokawa
IPC: G02F1/1676 , G02F1/167 , G02F1/1685 , G02F1/16756
Abstract: A light distribution control device includes: first upper electrodes and second upper electrodes disposed alternately in a first direction; first lower electrodes and second lower electrodes disposed alternately in a second direction that crosses the first direction; light transmissive regions disposed between an upper electrode set consisting of the first upper electrodes and the second upper electrodes and a lower electrode set consisting of the first lower electrodes and second lower electrodes; and colored electrophoretic particles and a dispersion medium contained in a space between light transmissive regions. Each of the first upper electrodes extends along the space between light transmissive regions. Each of the second upper electrodes extends along a line of light transmissive regions. Each of the first lower electrodes extends along the space between light transmissive regions. Each of the second lower electrodes extends along a line of light transmissive regions.
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公开(公告)号：US10942382B2
公开(公告)日：2021-03-09
申请号：US16157641
申请日：2018-10-11
Applicant: TIANMA JAPAN, LTD.
Inventor： Koji Shigemura , Kunihiro Shiota
IPC: G02F1/13 , G02F1/1343 , G02F1/167 , G02F1/1335
Abstract: Provided is a microlouver (optical element) having a transparent layer inclined to attain a desired viewing angle. The optical element includes patterned transparent layer and light absorbing layer on a transparent substrate. At least a part of the members of the transparent layer and the light absorbing layer are inclined with respect to the normal to the plane of the transparent substrate where patterns of the transparent layer and the light absorbing layer are provided. The inclination satisfies |α′(x)−β(x)|
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公开(公告)号：US11086185B2
公开(公告)日：2021-08-10
申请号：US16150388
申请日：2018-10-03
Applicant: TIANMA JAPAN, LTD.
Inventor： Kunihiro Shiota , Ken Sumiyoshi , Takumi Usukura
IPC: C25D13/12 , G02B5/00 , G02B27/14 , G02F1/167 , G02F1/1681
Abstract: A light beam direction control element includes: a first transparent substrate; a second transparent substrate facing the first transparent substrate; a first conductive film pattern having openings and being formed on a surface of the first transparent substrate opposing the second transparent substrate; a second conductive film pattern having openings and being formed on a surface of the second transparent substrate opposing the first transparent substrate; an electrophoretic element being sandwiched between the first and second conductive film patterns, and including light-shielding electrophoretic particles having a surface charge and a transparent dispersion medium; and light-transmissive regions being disposed between the first and second transparent substrates, being sandwiched between at least a portion of the openings of the first and second conductive film patterns, having a surface parallel to the first and second conductive film patterns, and having side walls surrounded by the electrophoretic element.
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公开(公告)号：US10908473B2
公开(公告)日：2021-02-02
申请号：US16215117
申请日：2018-12-10
Applicant: Tianma Japan, Ltd.
Inventor： Tetsushi Sato , Kazunori Masumura , Kunihiro Shiota
Abstract: A light beam direction control device is provided with a transparent substrates in which main surfaces of the transparent substrate are opposed to each other, transparent conductive films respectively disposed on the main surface side of the transparent substrate, electrodes electrically connected to the transparent conductive films, a control circuit for controlling a potential difference between the transparent conductive films and a plurality of light beam transmitting regions arranged on the transparent substrates, light beam absorbing regions disposed between the adjacent light beam transmitting regions, and the transparent conductive films. When shifting the range of outgoing direction of light beam to a narrow state, the control circuit applies the electrodes electrically open and holds the open state.
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Patent Agency Ranking
公开(公告)号：US11042072B2
公开(公告)日：2021-06-22
申请号：US16275752
申请日：2019-02-14
Applicant: Tianma Japan, Ltd.
Inventor： Kunihiro Shiota , Takumi Usukura
IPC: G02F1/1679 , G02F1/167 , G02F1/1676 , G02F1/16755
Abstract: A light beam direction control element includes: a first transparent substrate; a second transparent substrate which is disposed facing the first transparent substrate; light shielding elements which are disposed between the first transparent substrate and the second transparent substrate; light transmission regions which are disposed between the first transparent substrate and the second transparent substrate and whose sidewalls are surrounded by any of the light shielding elements; a resin layer which is disposed between the first transparent substrate and the second transparent substrate, surrounds an outer circumference of a light transmission region pattern formed by the light transmission regions, and includes a sealed first opening unit; and a first buffer region which is sandwiched between a surface including the first opening unit of the resin layer and the light transmission region pattern, and in which the light shielding elements are injected.
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公开(公告)号：US10791594B2
公开(公告)日：2020-09-29
申请号：US16697511
申请日：2019-11-27
Applicant: TIANMA JAPAN, LTD.
Inventor： Tetsushi Sato , Kazunori Masumura , Kunihiro Shiota , Kenichi Takatori
IPC: H05B39/04 , G02B5/30 , H05B47/105
Abstract: A control circuit is configured to: change a dispersion state of the electrophoretic particles by controlling voltage across the first transparent electrode and the second transparent electrode to change a range of exit direction of light transmitted through the light transmissive regions and the dispersion medium; apply direct voltage at a first voltage value across the first transparent electrode and the second transparent electrode to change the range of exit direction from a narrow range to a wide range; measure luminance of light transmitted through the light beam direction control panel during application of the voltage at the first voltage value; and increase the voltage value to be applied across the first transparent electrode and the second transparent electrode in a case where the measured luminance of the transmitted light is lower than a target value.
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公开(公告)号：US20220236617A1
公开(公告)日：2022-07-28
申请号：US17582632
申请日：2022-01-24
Applicant: TIANMA JAPAN, LTD.
Inventor： Kunihiro Shiota , Ken Sumiyoshi
IPC: G02F1/167 , G02F1/1676 , G02F1/13357 , G02F1/16755 , G02F1/29
Abstract: A light ray direction control element includes a first light transmitting substrate, a second light transmitting substrate facing the first light transmitting substrate, a first light transmitting region provided on a first main surface of the first light transmitting substrate, a second light transmitting region provided on a first main surface of the second light transmitting substrate, first light absorbing regions positioned among the first light transmitting region, and second light absorbing regions positioned among the second light transmitting region. The light ray direction control element further includes a light transmitting dispersion medium enclosed in the first light absorbing regions and the second light absorbing regions, and charged electrophoretic particles dispersed in the light transmitting dispersion medium. When viewing a cross-section perpendicular to the first main surface of the first light transmitting substrate, the shape or the angle of inclination, with respect to the first main surface of the first light transmitting substrate, of the first light transmitting region and the second light transmitting region differs.
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公开(公告)号：US12235561B2
公开(公告)日：2025-02-25
申请号：US17582632
申请日：2022-01-24
Applicant: TIANMA JAPAN, LTD.
Inventor： Kunihiro Shiota , Ken Sumiyoshi
IPC: G02F1/167 , G02F1/13357 , G02F1/16755 , G02F1/1676 , G02F1/29 , G02F1/1675
Abstract: A light ray direction control element includes a first light transmitting substrate, a second light transmitting substrate facing the first light transmitting substrate, a first light transmitting region provided on a first main surface of the first light transmitting substrate, a second light transmitting region provided on a first main surface of the second light transmitting substrate, first light absorbing regions positioned among the first light transmitting region, and second light absorbing regions positioned among the second light transmitting region. The light ray direction control element further includes a light transmitting dispersion medium enclosed in the first light absorbing regions and the second light absorbing regions, and charged electrophoretic particles dispersed in the light transmitting dispersion medium. When viewing a cross-section perpendicular to the first main surface of the first light transmitting substrate, the shape or the angle of inclination, with respect to the first main surface of the first light transmitting substrate, of the first light transmitting region and the second light transmitting region differs.
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公开(公告)号：US11798966B2
公开(公告)日：2023-10-24
申请号：US17126354
申请日：2020-12-18
Inventor： Kunihiro Shiota , Ken Sumiyoshi , Hiroshi Haga
IPC: H01L27/146 , G02B5/00
CPC classification number: H01L27/14625 , G02B5/003
Abstract: A light ray direction control element includes a base, a plurality of light transmitting layers arranged on a main surface of the base, a light absorbing layer disposed among the plurality of light transmitting layers, and a tilt prevention layer provided on the main surface of the base and disposed on an outer periphery of a region in which the plurality of light transmitting layers is disposed.
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