公开(公告)号：US20240203725A1

公开(公告)日：2024-06-20

申请号：US18555367

申请日：2022-04-15

Applicant: Ushio Denki Kabushiki Kaisha

Inventor： Akihiro KUNO ,  Hideaki YAGYU ,  Shigeki FUJISAWA

IPC: H01J61/54 ,  H01J61/16 ,  H01J65/00

CPC classification number: H01J61/54 ,  H01J61/16 ,  H01J65/00

Abstract: The startability of an ultraviolet ray generation device including an excimer lamp as an ultraviolet light source is to be improved. An ultraviolet ray generation device includes: an excimer lamp having a discharge container in which a discharge gas is sealed; a first electrode body and a second electrode body that are disposed so as not to be exposed to the discharge gas; and a first conductor electrically connected to one of the first electrode body and the second electrode body. The first conductor faces the other electrode body or a second conductor electrically connected to the other electrode body, through a dielectric member. The first conductor causes an atmospheric discharge around the first conductor.

公开(公告)号：US20210272792A1

公开(公告)日：2021-09-02

申请号：US17257268

申请日：2019-06-26

Applicant: Ushio Denki Kabushiki Kaisha

Inventor： Shigeki FUJISAWA ,  Kazuyuki MORI

IPC: H01J65/00 ,  H01J61/12 ,  H01J61/30 ,  H01J61/33 ,  H01J61/36

Abstract: In the excimer lamp according to the present invention, a flat discharge vessel having a substantially rectangular cross-sectional shape and comprising a pair of planar parts and a pair of side-surface parts has a pair of external electrodes disposed on the respective outer surfaces of the planar parts. The end parts of the external electrodes are provided with an auxiliary electrode extending to a region that is made smaller than the distance between the planar parts. A lead that supplies electricity to the external electrode is connected to the auxiliary electrode in the region that is made smaller than the distance between the planar parts.

公开(公告)号：US20240123103A1

公开(公告)日：2024-04-18

申请号：US18555379

申请日：2022-03-31

Applicant: Ushio Denki Kabushiki Kaisha

Inventor： Akihiro KUNO ,  Hideaki YAGYU ,  Shigeki FUJISAWA

IPC: A61L2/10 ,  A61L2/26

CPC classification number: A61L2/10 ,  A61L2/26 ,  A61L2202/11

Abstract: To provide an ultraviolet light irradiation device capable of inactivating bacteria, viruses, and the like with increased efficiency while ensuring safety. An ultraviolet light irradiation device according to the present invention includes a light source to emit ultraviolet light having a wavelength within a range of 190 nm or more and less than 240 nm, a housing to house the light source, a light extraction part to extract the ultraviolet light emitted from the light source out of the housing, and a diffusion transmission member to diffuse and transmit the ultraviolet light.

公开(公告)号：US20240334561A1

公开(公告)日：2024-10-03

申请号：US18622410

申请日：2024-03-29

Applicant: Ushio Denki Kabushiki Kaisha

Inventor： Koji ODA ,  Hideyuki URAKAMI ,  Shigeki FUJISAWA ,  Minoru SHIGOKU

IPC: H05B41/28 ,  C02F1/32

CPC classification number: H05B41/28 ,  C02F1/325 ,  C02F2201/3222 ,  C02F2201/326 ,  C02F2303/04

Abstract: Provided are a fluid treatment device and a lighting circuit that allow a dielectric barrier discharge lamp to be stably lit irrespective of state of treatment of a fluid. A fluid treatment device includes: a lighting circuit of a flyback type, the lighting circuit including a direct-current power source, a transformer including a primary winding and a secondary winding, at least one switching element, and a controller to control the switching element; and an ultraviolet irradiation unit connected to the secondary winding of the transformer, the ultraviolet irradiation unit including a light-emitting tube in which a light-emitting gas is sealed, a first electrode disposed in the light-emitting tube, and a second electrode, wherein a space into which a fluid to be treated flows being interposed between the first electrode and the second electrode.

公开(公告)号：US20230293746A1

公开(公告)日：2023-09-21

申请号：US18174422

申请日：2023-02-24

Applicant: Ushio Denki Kabushiki Kaisha

Inventor： Shigeki FUJISAWA ,  Hideaki YAGYU ,  Akihiro KUNO

IPC: A61L2/10 ,  G02B5/20 ,  A61L2/26

CPC classification number: A61L2/10 ,  A61L2/26 ,  G02B5/208 ,  A61L2202/11

Abstract: An ultraviolet light irradiation device includes an optical filter. The optical filter has a transmission spectrum of zero-degree light including a first transmission band and a second transmission band that transmit the zero-degree light and a first restriction band that restricts transmission of the zero-degree light. The first transmission band is present within the wavelength band of 200 nm or more and less than 240 nm. The second transmission band is present within a wavelength band of more than 300 nm and less than 400 nm. The first restriction band is present over an entire wavelength range of at least 240 nm or more and 300 nm or less, and the first restriction band has an upper limit provided within a range of more than 300 nm and 380 nm or less.

公开(公告)号：US20230248857A1

公开(公告)日：2023-08-10

申请号：US17610424

申请日：2021-08-20

Applicant: Ushio Denki Kabushiki Kaisha

Inventor： Keisuke NAITO ,  Hideaki YAGYU ,  Akihiro KUNO ,  Shigeki FUJISAWA

IPC: A61L2/10 ,  A61L2/26 ,  H01J61/02 ,  H01J61/40

CPC classification number: A61L2/10 ,  A61L2/26 ,  H01J61/025 ,  H01J61/40 ,  A61L2202/11

Abstract: Provided is an ultraviolet light irradiation device that is capable of causing effective inactivation of microorganisms as well as a method of using the ultraviolet light irradiation device.
An ultraviolet light irradiation device includes a light source that radiates ultraviolet light with a wavelength in a range of 190 nm to 235 nm; a housing that houses the light source; an extracting portion that extracts the ultraviolet light that is radiated from the light source and causes it to be directed toward an exterior of the housing; and a diffusing member that diffuses the ultraviolet light.

公开(公告)号：US20220262617A1

公开(公告)日：2022-08-18

申请号：US17736279

申请日：2022-05-04

Applicant: Ushio Denki Kabushiki Kaisha

Inventor： Shigeki FUJISAWA ,  Kazuyuki MORI

IPC: H01J65/00 ,  H01J61/12 ,  H01J61/36 ,  H01J61/30 ,  H01J61/33

Abstract: In the excimer lamp according to the present invention, a flat discharge vessel having a substantially rectangular cross-sectional shape and comprising a pair of planar parts and a pair of side-surface parts has a pair of external electrodes disposed on the respective outer surfaces of the planar parts. The end parts of the external electrodes are provided with an auxiliary electrode extending to a region that is made smaller than the distance between the planar parts. A lead that supplies electricity to the external electrode is connected to the auxiliary electrode in the region that is made smaller than the distance between the planar parts.