Patents by Inventor Seiko Kawashima

Seiko Kawashima 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).

  • Metal halide lamp, headlight apparatus for vehicle using the same, and method of manufacturing metal halide lamp
    Patent number: 7116050
    Abstract: A metal halide lamp comprises a discharge container including a discharge space and a pair of sealing sections. A discharge medium containing a metal halide and a rare gas and essentially free from mercury is sealed in the discharge container. A pair of electrodes are arranged to face each other within the discharge space, and the side edge portions on the side of the proximal end portion of these electrodes are held by the sealing sections. The amount of water contained in the metal halide, i.e., the light-emitting material, included in the metal halide lamp essentially free from mercury, i.e., Hg-less metal halide lamp, is controlled to 50 ppm or less.
    Type: Grant
    Filed: November 3, 2003
    Date of Patent: October 3, 2006
    Assignees: Harison Toshiba Lighting Corp., Toshiba Lighting & Technology Corporation
    Inventors: Nobuhiro Tamura, Seiko Kawashima, Takuya Honma, Hiromichi Kawashima, Hiroyuki Kato, Makoto Deguchi
  • Metal halide lamp, headlight apparatus for vehicle using the same, and method of manufacturing metal halide lamp
    Publication number: 20050093455
    Abstract: A metal halide lamp comprises a discharge container including a discharge space and a pair of sealing sections. A discharge medium containing a metal halide and a rare gas and essentially free from mercury is sealed in the discharge container. A pair of electrodes are arranged to face each other within the discharge space, and the side edge portions on the side of the proximal end portion of these electrodes are held by the sealing sections. The amount of water contained in the metal halide, i.e., the light-emitting material, included in the metal halide lamp essentially free from mercury, i.e., Hg-less metal halide lamp, is controlled to 50 ppm or less.
    Type: Application
    Filed: November 3, 2003
    Publication date: May 5, 2005
    Inventors: Nobuhiro Tamura, Seiko Kawashima, Takuya Honma, Hiromichi Kawashima, Hiroyuki Kato, Makoto Deguchi
  • Metal halide lamp and automotive headlamp apparatus
    Publication number: 20030222584
    Abstract: To improve the ratio between first and second halides sealed in a mercury-free lamp, thereby providing a metal halide lamp which has a high luminous efficiency and a low lamp voltage reduction and emits light of an appropriate color and an automotive headlamp apparatus incorporating the same.
    Type: Application
    Filed: March 24, 2003
    Publication date: December 4, 2003
    Inventors: Makoto Deguchi, Hiromichi Kawashima, Kozo Uemura, Hiroyuki Kato, Nobuhiro Tamura, Seiko Kawashima
  • Fluorescent lamp, self-ballasted fluorescent lamp and lighting apparatus
    Publication number: 20020057059
    Abstract: The fluorescent lamp has a bulb formed by lead-free glass having an ultraviolet ray transmission factor of 40% or less at 300 nm or less, mercury gas and rare gas sealed in the glass bulb, a phosphor layer formed on the inner wall of the glass bulb, and a pair of discharge electrodes for causing discharge in the glass bulb and the lead-free glass contains an ultraviolet ray reduction material for absorbing or reflecting ultraviolet rays generated from the fluorescent lamp and can reduce ultraviolet rays to 40% or less at a wavelength of 300 nm or less.
    Type: Application
    Filed: July 27, 2001
    Publication date: May 16, 2002
    Inventors: Kazuhisa Ogishi, Hidenori Ito, Seiko Kawashima, Nobuhiro Tamura, Yuichi Sakakibara, Keiji Hatakeyama