Patents by Inventor Yoshiharu Nishiura

Yoshiharu Nishiura 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).

  • Patent number: 7468585
    Abstract: A metal halide lamp of the present invention has an arc tube formed of ceramic and a pair of opposing electrodes. This lamp includes a Pr (praseodymium) halide, a Na (sodium) halide, and a Ca (calcium) halide enclosed within the arc tube. The Pr halide content Hp [mol], the Na halide content Hn [mol], and the Ca halide content Hc [mol] satisfy the relationships of 0.4?Hc/Hp?15.0 and 3.0?Hn/Hp?25.0.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: December 23, 2008
    Assignee: Panasonic Corporation
    Inventors: Atsushi Utsubo, Hiroshi Nohara, Yukiya Kanazawa, Yoshiharu Nishiura, Kiyoshi Takahashi, Makoto Kai, Makoto Horiuchi
  • Publication number: 20070159104
    Abstract: The present invention aims at providing a metal halide lamp that (i) prevents a decline in the lumen maintenance and a deterioration of quality in appearance due to the coloring of a casing tube surrounding the arc tube, and at the same time (ii) achieves high luminous efficiency. A metal halide lamp (1) has a pair of electrodes (20a&b) placed in an arc tube (3) made of translucent ceramic, and a sodium halide is enclosed therein. The metal halide lamp (1) satisfies L/D 4, where L (mm) is the length of the space between the electrodes (20a&b) and D (mm) is the internal diameter of the arc tube (3). The metal halide lamp (1) has a casing tube (2) surrounding the arc tube (3), at least around a portion between the electrodes (20a&b). Here, R/r 3.
    Type: Application
    Filed: December 20, 2004
    Publication date: July 12, 2007
    Inventors: Yukiya Kanazawa, Atsushi Utsubo, Hiroshi Nohara, Shunsuke Kakisaka, Yoshiharu Nishiura
  • Patent number: 7230389
    Abstract: A metal halide lamp includes a ceramic arc tube that is composed of a main body and two narrow tube parts provided at respective ends of the main body; a pair of electrodes provided inside the main body; two feeders, each being connected at one end thereof to a different one of the electrodes inside the main body, and extending through a different one of the narrow tube parts, so as to be external to the arc tube at another end; a starting wire that is connected to one of the feeders, and that is in a vicinity of or contacts an outer surface of the arc tube; and a current suppressing unit that is on a current path of the starting wire, and suppresses or cuts off current on the path.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: June 12, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuo Takeda, Isao Ota, Kazushige Sakamoto, Yoshiharu Nishiura
  • Patent number: 7227309
    Abstract: The present invention provides a metal halide lamp in which the change of the color temperature is suppressed regardless of the orientation of the light emitting bulb in use. The metal halide lamp includes a light emitting bulb of translucent ceramics that includes a light emitting portion and tubular portions that are connected to the light emitting portion. The light emitting portion includes a liquid holding portion on the inner surface of the light emitting portion so as to hold a liquefied substance that moves on the inner surface toward one of the tubular portions. The internal diameter d of the light emitting bulb at the liquid holding portion satisfies 0.4D<d<0.7D, where D is an internal diameter of the light emitting bulb at the maximum internal diameter portion of the light emitting portion.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: June 5, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yasutaka Horibe, Yoshiharu Nishiura, Shunsuke Kakisaka
  • Patent number: 7138766
    Abstract: A metal halide lamp in which an arc tube is housed within a bulb having a base at one end thereof. The arc tube includes a main tube, two thin tubes that extend one from each end of the main tube, and a pair of electrode inductors. The main tube and the thin tubes are made from translucent polycrystalline alumina and constitute a discharge vessel having a discharge space therein. Lamp power under dimming conditions is set in a range defined by maximum lamp power Wmax [W] and minimum lamp power Wmin [W], with a surface area S [cm2] of the inner surface of the discharge vessel satisfying Wmax/60?S?Wmin/20.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: November 21, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuyoshi Takeuchi, Takashi Maniwa, Yoshiharu Nishiura
  • Publication number: 20060170363
    Abstract: A metal halide lamp of the present invention has an arc tube formed of ceramic and a pair of opposing electrodes. This lamp includes a Pr (praseodymium) halide, a Na (sodium) halide, and a Ca (calcium) halide enclosed within the arc tube. The Pr halide content Hp [mol], the Na halide content Hn [mol], and the Ca halide content Hc [mol] satisfy the relationships of 0.4?Hc/Hp?15.0 and 3.0?Hn/Hp?=25.0.
    Type: Application
    Filed: July 22, 2004
    Publication date: August 3, 2006
    Inventors: Atsushi Utsubo, Hiroshi Nohara, Yukiya Kanazawa, Yoshiharu Nishiura, Kiyoshi Takahashi, Makoto Kai, Makoto Horiuchi
  • Patent number: 7078860
    Abstract: A metal vapor discharge lamp, comprises: a translucent ceramic envelope, the envelope comprising a center bulb for defining a discharge space and side tubes, the center bulb and the side tubes being integrally molded; a pair of current suppliers extending through hollows of the side tubes respectively, each of the current suppliers comprising an electrode and a lead-in wire, a first end of the electrode being disposed in the discharge space, a second end of the electrode being connected with the lead-in wire; a sealant for hermetically sealing open ends of the side tubes; and a light-emitting metal contained in the discharge space. An inner wall and an external wall of a seamless boundary portion between the center bulb and each of the side tubes have the smallest curvature radius of Ri mm and Ro mm, respectively. The center bulb has an inner diameter of D mm. The lamp has an electric power of P watts. The radius Ri, radius Ro, diameter D and electric power P satisfy, ?0.00076P+0.304?Ri/D??0.00076P+0.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: July 18, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mikio Miura, Shunsuke Kakisaka, Yoshiharu Nishiura
  • Publication number: 20060145625
    Abstract: A metal halide lamp has an arc tube that includes: a pair of electrode structures, each of which has an electrode at a tip; a main tube part made of polycrystalline alumina ceramic, and containing a discharge space in which the electrodes of the electrode structures are located to oppose each other; and a pair of thin tube parts that connect from the main tube part and are sealed by respective sealing members with the electrode structures inserted therein, where 20?WL?50, EL/Di?2.0, and 0.5?G?5.
    Type: Application
    Filed: September 6, 2004
    Publication date: July 6, 2006
    Inventors: Nobuyoshi Takeuchi, Yoshiharu Nishiura
  • Patent number: 7061182
    Abstract: A metal halide lamp has an arc tube including an arc tube container made of an oxide-based translucent ceramic material. The arc tube is filled with cerium halide as a luminescent material and a halide of a rare earth element that is more reactive with the ceramic material than is the cerium halide. Accordingly, a reaction between the oxide-based translucent ceramic material and the halide of a rare earth element is accelerated while a reaction between the oxide-based translucent ceramic material and the cerium halide is suppressed. This suppresses a decrease of the cerium halide that serves for light emission, and also reduces changes in the lamp color temperature. Thereby, during aging of the lamp, the flux maintenance factor and color temperature are improved. Therefore, the indoor-outdoor metal halide lamp provides a white light source color that has high-wattage, high luminous efficiency, and a long service life.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: June 13, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masanori Higashi, Yoshiharu Nishiura, Shigefumi Oda, Hiroshi Enami, Shunsuke Kakisaka
  • Patent number: 7057347
    Abstract: A first electrode part in a rod shape is placed on an upper side, and a second electrode part in a rod shape having a higher melting point than that of the first electrode part is placed on a lower side, so that ends of the first and second electrode parts are brought into contact. Contact ends or vicinities thereof are irradiated with a laser beam, so that the electrode parts are welded. Here, a region irradiated with the laser beam is in a long narrow shape having a minor axis directed in a vertical direction and a major axis directed in a horizontal direction. This makes it possible to manufacture an electrode with a consistent high quality with a high yield.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: June 6, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tatsuya Kawamura, Toshizo Kobayashi, Hiroshi Enami, Yoshiharu Nishiura, Takaharu Yanata
  • Patent number: 7018260
    Abstract: A first electrode part in a rod shape is placed on an upper side, and a second electrode part in a rod shape having a higher melting point than that of the first electrode part is placed on a lower side, so that ends of the first and second electrode parts are brought into contact. Contact ends or vicinities thereof are irradiated with a laser beam, so that the electrode parts are welded. Here, a region irradiated with the laser beam is in a long narrow shape having a minor axis directed in a vertical direction and a major axis directed in a horizontal direction. This makes it possible to manufacture an electrode with a consistent high quality with a high yield.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: March 28, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tatsuya Kawamura, Toshizo Kobayashi, Hiroshi Enami, Yoshiharu Nishiura, Takaharu Yanata
  • Patent number: 6984938
    Abstract: A metal vapor discharge lamp including an arc tube 1 that includes a container 10 and power transmission members 20a and 20b. The container 10, made of translucent ceramic, is divided into a main tube portion 11 and narrow tube portions 12a and 12b extending out from both ends of the main tube portion 11. The power transmission members 20a and 20b respectively include electrode pins 21a and 21b made of tungsten. Coils 22a and 22b made of tungsten are respectively wound around ends of electrode pins 21a and 21b, which are respectively joined with electrode supporting members 23a and 23b made of conductive cermet. Electrode length L1 is set to (0.041P+0.5) mm to (0.041P+8.0) mm, ā€œPā€ representing a lamp power in watts. Alternatively, a narrow tube portion length L2 is set to (0.032P+3.5) mm to (0.032P+8.0) mm inclusive.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: January 10, 2006
    Assignee: Matsushita Electric Industrial Co., LTD
    Inventors: Shunsuke Kakisaka, Tatsuo Nishimoto, Masanori Higashi, Mikio Miura, Hiroshi Enami, Yoshiharu Nishiura
  • Patent number: 6943498
    Abstract: To provide a high-efficiency and long-life high intensity discharge lamp that is obtained by a configuration in which a neon gas or a neon-based gaseous mixture is filled as a starting-assistance rare gas for an alumina ceramic arc tube, and a filling pressure is set to 13 kPa or more. The high intensity discharge lamp is provided with the alumina ceramic arc tube having a discharge arc tube, alumina ceramic narrow tubes formed at both end portions of the discharge arc tube, electrodes and power feeders, the electrodes and the power feeders being arranged to form spaces in the narrow tubes. The discharge arc tube is filled with the neon gas or the neon-based gaseous mixture as the starting-assistance rare gas at a filling pressure of 13 kPa or more.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: September 13, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiharu Nishiura, Shigefumi Oda, Masanori Higashi, Shunsuke Kakisaka, Hiroshi Enami
  • Publication number: 20050073257
    Abstract: A metal halide lamp in which an arc tube is housed within a bulb having a base at one end thereof. The arc tube includes a main tube, two thin tubes that extend one from each end of the main tube, and a pair of electrode inductors. The main tube and the thin tubes are made from translucent polycrystalline alumina and constitute a discharge vessel having a discharge space therein. Lamp power under dimming conditions is set in a range defined by maximum lamp power Wmax [W] and minimum lamp power Wmin [W], with a surface area S [cm2] of the inner surface of the discharge vessel satisfying Wmax/60?S?Wmin/20.
    Type: Application
    Filed: August 13, 2004
    Publication date: April 7, 2005
    Inventors: Nobuyoshi Takeuchi, Takashi Maniwa, Yoshiharu Nishiura
  • Publication number: 20050029656
    Abstract: A first electrode part in a rod shape is placed on an upper side, and a second electrode part in a rod shape having a higher melting point than that of the first electrode part is placed on a lower side, so that ends of the first and second electrode parts are brought into contact. Contact ends or vicinities thereof are irradiated with a laser beam, so that the electrode parts are welded. Here, a region irradiated with the laser beam is in a long narrow shape having a minor axis directed in a vertical direction and a major axis directed in a horizontal direction. This makes it possible to manufacture an electrode with a consistent high quality with a high yield.
    Type: Application
    Filed: September 2, 2004
    Publication date: February 10, 2005
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Tatsuya Kawamura, Toshizo Kobayashi, Hiroshi Enami, Yoshiharu Nishiura, Takaharu Yanata
  • Publication number: 20050029950
    Abstract: A first electrode part in a rod shape is placed on an upper side, and a second electrode part in a rod shape having a higher melting point than that of the first electrode part is placed on a lower side, so that ends of the first and second electrode parts are brought into contact. Contact ends or vicinities thereof are irradiated with a laser beam, so that the electrode parts are welded. Here, a region irradiated with the laser beam is in a long narrow shape having a minor axis directed in a vertical direction and a major axis directed in a horizontal direction. This makes it possible to manufacture an electrode with a consistent high quality with a high yield.
    Type: Application
    Filed: September 2, 2004
    Publication date: February 10, 2005
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Tatsuya Kawamura, Toshizo Kobayashi, Hiroshi Enami, Yoshiharu Nishiura, Takaharu Yanata
  • Patent number: 6815893
    Abstract: The present invention provides a metal halide lamp having a ceramic arc tube vessel that includes a discharge arc tube member and thin tube members, the discharge arc tube member including taper parts and a main tube part in the middle in a longitudinal direction, the taper parts and the main tube part having a larger outside diameter than an outside diameter of ends of the discharge arc tube in a longitudinal direction, and the thin tube members each being fit to the respective ends of the discharge arc tube, where a minimum curvature radius R is set to be 0.3 mm or more at each transitional area of an external surface between each taper part and a corresponding end of the discharge arc tube.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: November 9, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shunsuke Kakisaka, Kazuo Takeda, Takashi Maniwa, Yoshiharu Nishiura
  • Patent number: 6805603
    Abstract: A first electrode part in a rod shape is placed on an upper side, and a second electrode part in a rod shape having a higher melting point than that of the first electrode part is placed on a lower side, so that ends of the first and second electrode parts are brought into contact. Contact ends or vicinities thereof are irradiated with a laser beam, so that the electrode parts are welded. Here, a region irradiated with the laser beam is in a long narrow shape having a minor axis directed in a vertical direction and a major axis directed in a horizontal direction. This makes it possible to manufacture an electrode with a consistent high quality with a high yield.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: October 19, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tatsuya Kawamura, Toshizo Kobayashi, Hiroshi Enami, Yoshiharu Nishiura, Takaharu Yanata
  • Publication number: 20040189207
    Abstract: A metal vapor discharge lamp, comprises: a translucent ceramic envelope, the envelope comprising a center bulb for defining a discharge space and side tubes, the center bulb and the side tubes being integrally molded; a pair of current suppliers extending through hollows of the side tubes respectively, each of the current suppliers comprising an electrode and a lead-in wire, a first end of the electrode being disposed in the discharge space, a second end of the electrode being connected with the lead-in wire; a sealant for hermetically sealing open ends of the side tubes; and a light-emitting metal contained in the discharge space. An inner wall and an external wall of a seamless boundary portion between the center bulb and each of the side tubes have the smallest curvature radius of Ri mm and Ro mm, respectively. The center bulb has an inner diameter of D mm. The lamp has an electric power of P watts.
    Type: Application
    Filed: March 23, 2004
    Publication date: September 30, 2004
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Mikio Miura, Shunsuke Kakisaka, Yoshiharu Nishiura
  • Patent number: 6774559
    Abstract: A metal vapor discharge lamp including an outer tube having a closed portion at a first end and a base at a second end; a discharge tube inside of which an electrode is provided, located in the outer tube; and a sleeve enveloping the discharge tube and located in the outer tube, wherein the sleeve includes an open portion on the closed portion side of the outer tube; the closed portion side of the outer tube is provided with a support for supporting an end of the closed portion side of the sleeve; the support comprises a column portion having a narrow plate shape or a narrow stick shape separated from the open portion of the closed portion side of the sleeve, and a sleeve holding portion provided at an end of the column portion and is in contact with the sleeve; and the support is connected to a feeding body connected to the electrode and led from the discharge tube toward the side of the closed portion, and the support also is connected to an electric power supply wire extending toward the side of the base.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: August 10, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shunsuke Kakisaka, Yoshiharu Nishiura