Patents by Inventor Shingo Higashisaka

Shingo Higashisaka 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).

  • Electrodeless discharge lamp with rare earth metal halides and halogen cycle promoting substance
    Patent number: 5866981
    Abstract: An electrodeless metal vapor discharge lamp having an airtight arc tube formed with a light transmitting material of metal oxide and containing as sealed therein luminescent substances containing at least one or more of rare earth metallic halide, further includes a promoting substance which renders a halogen cycle occurring adjacent to inner wall surface of the arc tube to be more easily promoted, so as to prevent lamp starting voltage from raising up.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: February 2, 1999
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Motohiro Saimi, Atsunori Okada, Kazuhiko Watanabe, Shingo Higashisaka, Koji Nishioka
  • Electrodeless discharge lamp utilizing induced electric field generated by a high frequency electromagnetic field
    Patent number: 5747945
    Abstract: An electrodeless discharge lamp includes a single type auxiliary electrode for preliminary discharging, disposed on or adjacent to outer peripheral wall of lamp tube at a position for being electrostatically coupled to interior space of the tube, and supplied with a power from a second high frequency power source other than a first high frequency power source supplying a high frequency power to a main induction coil on the tube, whereby the lamp is made to attain an excellent startability without requiring any large size high frequency power source.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: May 5, 1998
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Shin Ukegawa, Shigeaki Wada, Atsunori Okada, Shingo Higashisaka, Miki Kotani
  • Electrodeless discharge lamp
    Patent number: 5519285
    Abstract: An electrodeless discharge lamp includes a discharge gas sealed in a lamp tube. The discharge gas includes a halide of rare earth metal. An auxiliary electrode is disposed on or adjacent to an outer periphery wall of the lamp tube such that the auxiliary electrode is capacitively coupled to an interior space of the lamp tube. A main induction coil is wound around the lamp tube and receives power from a first high frequency power source. The auxiliary electrode receives power from a second high frequency power source. In operation, the electrodeless discharge lamp attains smooth lighting upon starting or restarting.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: May 21, 1996
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Shin Ukegawa, Shigeaki Wada, Atsunori Okada, Shingo Higashisaka, Miki Kotani, Motohiro Saimi, Taku Sumitomo, Osamu Kuramitu, Shinichi Aoki
  • Electrodeless discharge lamp having a concave recess and foil electrode formed therein
    Patent number: 5367226
    Abstract: An electrodeless discharge lamp includes a single type auxiliary electrode for preliminary discharging, disposed on or adjacent to outer peripheral wall of lamp tube at a position for being electrostatically coupled to interior space of the tube, and supplied with a power from a second high frequency power source other than a first high frequency power source supplying a high frequency power to a main induction coil on the tube, whereby the lamp is made to attain an excellent startability without requiring any large size high frequency power source.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: November 22, 1994
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Shin Ukegawa, Shigeaki Wada, Atsunori Okada, Shingo Higashisaka, Miki Kotani
  • High intensity discharge lamp device
    Patent number: 5256940
    Abstract: A high intensity discharge lamp device is formed from materials which form complex halides enclosed in an arc tube in addition to rare gas and metal halides, to realize the high reproducibility of luminous color called for in visual machines and devices and so on.
    Type: Grant
    Filed: February 25, 1992
    Date of Patent: October 26, 1993
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Shigeaki Wada, Atsunori Okada, Shingo Higashisaka