Patents by Inventor Kazuhiro Daijo
Kazuhiro Daijo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240131836Abstract: A metal wire includes tungsten or a tungsten alloy. The metal wire has a diameter of at most 13 ?m, a tensile strength of at least 4.8 GPa, and a natural hanging length per 1000 mm of at least 800 mm.Type: ApplicationFiled: December 21, 2021Publication date: April 25, 2024Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Tomohiro KANAZAWA, Kazuhiro DAIJO, Kenshi TSUJI, Naoki KOHYAMA, Yui NAKAI
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Patent number: 11133172Abstract: There are provided a glass tube in which a rare gas under predetermined pressure is sealed, a cathode electrode and an anode electrode disposed in a first end portion and a second end portion of the glass tube, respectively, facing each other, and a trigger electrode including a transparent conductive film formed on an outer peripheral surface of the glass tube. The trigger electrode includes an electrode body disposed on the outer peripheral surface of the glass tube, along a tube axis direction of the glass tube, and an enlarged portion that covers at least any one of the cathode electrode and the anode electrode, and that has a circumferential width wider than a circumferential width of the electrode body. This provides a flash discharge tube capable of reducing variations in optical distribution characteristics during light emission with a small amount of light, and improving life durability during continuous emission of a large amount of light and at short intervals.Type: GrantFiled: June 21, 2019Date of Patent: September 28, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Shinji Kihara, Kazuhiro Daijo
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Publication number: 20210265156Abstract: There are provided a glass tube in which a rare gas under predetermined pressure is sealed, a cathode electrode and an anode electrode disposed in a first end portion and a second end portion of the glass tube, respectively, facing each other, and a trigger electrode including a transparent conductive film formed on an outer peripheral surface of the glass tube. The trigger electrode includes an electrode body disposed on the outer peripheral surface of the glass tube, along a tube axis direction of the glass tube, and an enlarged portion that covers at least any one of the cathode electrode and the anode electrode, and that has a circumferential width wider than a circumferential width of the electrode body. This provides a flash discharge tube capable of reducing variations in optical distribution characteristics during light emission with a small amount of light, and improving life durability during continuous emission of a large amount of light and at short intervals.Type: ApplicationFiled: June 21, 2019Publication date: August 26, 2021Inventors: SHINJI KIHARA, KAZUHIRO DAIJO
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Patent number: 10352533Abstract: In a light source device, an axis extends from a light-emitting face and perpendicularly to the light-emitting face. A reflective surface includes a curved surface defined by rotating a first arc which is a part of an ellipse around the axis. The ellipse has a first focal point and a second focal point which are located on the light-emitting face. The second focal point is located adjacently to the first arc with respect to a center of the ellipse. A distance from the first focal point to the axis is shorter than a distance from the second focal point to the axis.Type: GrantFiled: June 12, 2017Date of Patent: July 16, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Kazuhiro Daijo, Hiroyuki Yoshioka, Katsunori Kawabata, Yoshimichi Enno
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Patent number: 10309618Abstract: An illuminating device includes: first lenses individually corresponding to LEDs; a light control member including light transmission channels individually corresponding to the first lenses and a light blocker surrounding the light transmission channels; and second lenses individually corresponding to the light transmission channels. Each first lens includes a light concentrator for producing concentrated light by concentrating light emitted from a corresponding LED, and a reflector surrounding the light concentrator to produce reflected light by reflecting light emitted from the corresponding LED in a direction across the concentrated light. Each first lens outputs illumination light including the concentrated light and the reflected light produced from the corresponding light emitting diode. Each light transmission channel transmits the illumination light output from a corresponding first lens. The light blocker prevents transmission of the illumination light emitted from each first lens.Type: GrantFiled: January 31, 2017Date of Patent: June 4, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yoshimichi Enno, Hiroyuki Yoshioka, Katsunori Kawabata, Takao Kondo, Kazuhiro Daijo, Koji Uenoyama, Yoshihiro Muragaki
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Publication number: 20180003361Abstract: In a light source device, an axis extends from a light-emitting face and perpendicularly to the light-emitting face. A reflective surface includes a curved surface defined by rotating a first arc which is a part of an ellipse around the axis. The ellipse has a first focal point and a second focal point which are located on the light-emitting face. The second focal point is located adjacently to the first arc with respect to a center of the ellipse. A distance from the first focal point to the axis is shorter than a distance from the second focal point to the axis.Type: ApplicationFiled: June 12, 2017Publication date: January 4, 2018Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Kazuhiro DAIJO, Hiroyuki YOSHIOKA, Katsunori KAWABATA, Yoshimichi ENNO
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Publication number: 20170219186Abstract: An illuminating device includes: first lenses individually corresponding to LEDs; a light control member including light transmission channels individually corresponding to the first lenses and a light blocker surrounding the light transmission channels; and second lenses individually corresponding to the light transmission channels. Each first lens includes a light concentrator for producing concentrated light by concentrating light emitted from a corresponding LED, and a reflector surrounding the light concentrator to produce reflected light by reflecting light emitted from the corresponding LED in a direction across the concentrated light. Each first lens outputs illumination light including the concentrated light and the reflected light produced from the corresponding light emitting diode. Each light transmission channel transmits the illumination light output from a corresponding first lens. The light blocker prevents transmission of the illumination light emitted from each first lens.Type: ApplicationFiled: January 31, 2017Publication date: August 3, 2017Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yoshimichi ENNO, Hiroyuki YOSHIOKA, Katsunori KAWABATA, Takao KONDO, Kazuhiro DAIJO, Koji UENOYAMA, Yoshihiro MURAGAKI
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Publication number: 20140194954Abstract: A photoradiation device of the present invention includes a light emitting unit that radiates radiation light; a reflection unit that reflects the radiation light; and a light guide unit that guides the reflected radiation light to an irradiation target body. The light guide unit includes a first light guide face and a second light guide face. The reflection unit includes a first reflection unit that reflects a part of the radiation light to the first light guide face, a second reflection unit that reflects entering light to the second light guide face, and a third reflection unit formed of a main body part provided with a transmission unit which reflects a part of remainder of the radiation light to the second reflection unit as the entering light. The third reflection unit is disposed with a transmission unit side inclined toward a light emitting unit such that the shorter a distance of the transmission unit to the light emitting unit, the larger an amount of transmission light of the radiation light.Type: ApplicationFiled: August 22, 2012Publication date: July 10, 2014Applicant: PANASONIC CORPORATIONInventor: Kazuhiro Daijo
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Patent number: 8721128Abstract: A lens has a light-incoming face, a light-outgoing face, and a side face. The light-incoming face is disposed near a light source or in contact with the light source. The light-outgoing face is provided opposite to the light-incoming face. The side face has a curved total reflection surface that totally reflects a light beam that has entered the light-incoming face. The total reflection surface is formed so that light beams that have reflected off the total reflection surface focus in a given angle from the light-outgoing face.Type: GrantFiled: August 23, 2010Date of Patent: May 13, 2014Assignee: Panasonic CorporationInventor: Kazuhiro Daijo
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Publication number: 20140063775Abstract: The present invention includes a light-emitting element, and a reflector including a reflection face that reflects light from the light-emitting element toward a rectangular area to be photographed. The reflection face includes a pair of first refection faces facing each other with the light-emitting element interposed therebetween in a direction corresponding to a long-side direction demarcating the area to be photographed, and a pair of second reflection faces facing each other with the light-emitting element interposed therebetween in a direction corresponding to a short-side direction demarcating the area to be photographed. Furthermore, a height of the second reflection faces is lower than a height of the first reflection faces. This makes it possible to achieve a lighting apparatus used in photography, which is small and with which the whole area to be photographed is illuminated uniformly.Type: ApplicationFiled: June 28, 2012Publication date: March 6, 2014Applicant: PANASONIC CORPORATIONInventors: Nami Sawada, Kazuhiro Daijo
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Publication number: 20130282082Abstract: A light irradiation device of the present invention includes: a light source that emits radiant light to an irradiation object; a reflecting member that reflects the radiant light emitted from the light source toward the irradiation object; and an irradiation member that includes at least two irradiation surfaces for transmitting the radiant light reflected from the reflecting member and irradiating the irradiation object with the radiant light.Type: ApplicationFiled: March 23, 2012Publication date: October 24, 2013Applicant: PANASONIC CORPORATIONInventors: Kazuhiro Daijo, Nobuto Tsujikawa, Kazuto Shigehara
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Patent number: 8558266Abstract: In an LED lighting device of the present invention, the reflecting surface of the light guide body is formed of division lines and a connection line connecting between the division lines. Each division line divides a cross section line of a virtual reflecting surface crossing projection lines. Each projection line is radially drawn at a selected angle from a selected point of a given distance away from a center point of the LED element toward the cross section line of the virtual reflecting surface of the light guide body. Each division line is adjusted by similar amplification or similar contraction so as to be contained within the thickness line with its length large enough to receive all the incoming light.Type: GrantFiled: September 5, 2011Date of Patent: October 15, 2013Assignee: Panasonic CorporationInventor: Kazuhiro Daijo
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Patent number: 8515274Abstract: An illumination device including a light guide unit in which an optical path through which light propagates is formed in an annular shape such that the light propagating in the optical path is emitted from a front surface side of the light guide unit; a local reflection unit provided on the rear surface side of the light guide unit such that light is emitted from only a portion of the front surface side of the light guide unit; and a light source that moves between the light guide unit and the local reflection unit. When the light source is positioned on the light guide unit side, light output from the light source propagates in the optical path of the light guide unit and is emitted from the front surface side in an annular shape. When the light source is positioned on the local reflection unit side, the light output from the light source is reflected by the local reflection unit and emitted in a concentrated manner from only the portion on the front surface side of the light guide unit.Type: GrantFiled: May 12, 2011Date of Patent: August 20, 2013Assignee: Panasonic CorporationInventor: Kazuhiro Daijo
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Publication number: 20120321290Abstract: An illumination device including a light guide unit in which an optical path through which light propagates is formed in an annular shape such that the light propagating in the optical path is emitted from a front surface side of the light guide unit; a local reflection unit provided on the rear surface side of the light guide unit such that light is emitted from only a portion of the front surface side of the light guide unit; and a light source that moves between the light guide unit and the local reflection unit. When the light source is positioned on the light guide unit side, light output from the light source propagates in the optical path of the light guide unit and is emitted from the front surface side in an annular shape. When the light source is positioned on the local reflection unit side, the light output from the light source is reflected by the local reflection unit and emitted in a concentrated manner from only the portion on the front surface side of the light guide unit.Type: ApplicationFiled: May 12, 2011Publication date: December 20, 2012Applicant: Panasonic CorporationInventor: Kazuhiro Daijo
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Publication number: 20120181567Abstract: In an LED lighting device of the present invention, the reflecting surface of the light guide body is formed of division lines and a connection line connecting between the division lines. Each division line divides a cross section line of a virtual reflecting surface crossing projection lines. Each projection line is radially drawn at a selected angle from a selected point of a given distance away from a center point of the LED element toward the cross section line of the virtual reflecting surface of the light guide body. Each division line is adjusted by similar amplification or similar contraction so as to be contained within the thickness line with its length large enough to receive all the incoming light.Type: ApplicationFiled: September 5, 2011Publication date: July 19, 2012Applicant: Panasonic CorporationInventor: Kazuhiro Daijo
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Publication number: 20120140482Abstract: A lens has a light-incoming face, a light-outgoing face, and a side face. The light-incoming face is disposed near a light source or in contact with the light source. The light-outgoing face is provided opposite to the light-incoming face. The side face has a curved total reflection surface that totally reflects a light beam that has entered the light-incoming face. The total reflection surface is formed so that light beams that have reflected off the total reflection surface focus in a given angle from the light-outgoing face.Type: ApplicationFiled: August 23, 2010Publication date: June 7, 2012Applicant: PANASONIC CORPORATIONInventor: Kazuhiro Daijo