Patents by Inventor Hirosi Murayama

Hirosi Murayama 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).

  • Discharge lamp lighting device and light fixture
    Patent number: 7898191
    Abstract: In order to suppress cost of an initial investment by a user and running cost to the user to a low extent while substantially constantly maintaining an apparent illuminance, and further, to realize resource saving, in a case of using a fluorescent lamp FHF 32 as a discharge lamp La, a lamp supply power is started to be supplied from a value lower than 45 W as rated electric power at an initial period of an operation of the discharge lamp, a light adjustment signal is changed in response to an accumulated lighting time so that the lamp supply power can be a value higher than 45 W as the rated electric power on and after a rated lifetime of the discharge lamp La, whereby the lamp supply power (output of an inverter circuit 2) is adjusted.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: March 1, 2011
    Assignee: Panasonic Electric Works Co., Ltd.
    Inventors: Katunobu Hamamoto, Kei Mituyasu, Yosikazu Kado, Hirosi Murayama, Hiroyuki Hirose
  • DISCHARGE LAMP LIGHTING DEVICE AND LIGHT FIXTURE
    Publication number: 20100253233
    Abstract: In order to suppress cost of an initial investment by a user and running cost to the user to a low extent while substantially constantly maintaining an apparent illuminance, and further, to realize resource saving, in a case of using a fluorescent lamp FHF 32 as a discharge lamp La, a lamp supply power is started to be supplied from a value lower than 45 W as rated electric power at an initial period of an operation of the discharge lamp, a light adjustment signal is changed in response to an accumulated lighting time so that the lamp supply power can be a value higher than 45 W as the rated electric power on and after a rated lifetime of the discharge lamp La, whereby the lamp supply power (output of an inverter circuit 2) is adjusted.
    Type: Application
    Filed: January 16, 2007
    Publication date: October 7, 2010
    Applicant: MATSUSHITA ELECTRIC WORKS, LTD.
    Inventors: Katunobu Hamamoto, Kei Mituyasu, Yosikazu Kado, Hirosi Murayama, Hiroyuki Hirose