Patents by Inventor Shiro Isobe

Shiro Isobe 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).

  • Power supply unit for light source and method of controlling the same
    Patent number: 7504780
    Abstract: A power supply unit capable of varying power supplied to a light source at timings determined by synchronization signals is provided. The power supply unit comprises an interface that receives a plurality of types of synchronization signals with different pulse widths and a control unit that changes a setting of output power supplied by the power supply unit in accordance with the pulse widths of the plurality of types of synchronization signals. The control unit includes obtaining a standard time interval from a cycle of a standard type of synchronization signal that has a longest pulse width, parsing for determining type of each synchronization signal, redefining supply power values corresponding to respective types of synchronization signals, and changing the setting of output power of the power supply unit to a supply power value corresponding to a type of the synchronization signal.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: March 17, 2009
    Assignees: Rubycon Corporation, Phoenix Electric Co., Ltd.
    Inventors: Shiro Isobe, Tomotaka Mori, Toshitaka Fujii, Atsuji Nakagawa
  • Power Supply Unit For Light Source And Method Of Controlling The Same
    Publication number: 20080180953
    Abstract: A power supply unit capable of varying power supplied to a light source at timings determined by synchronization signals is provided. The power supply unit comprises an interface that receives a plurality of types of synchronization signals with different pulse widths and a control unit that changes a setting of output power supplied by the power supply unit in accordance with the pulse widths of the plurality of types of synchronization signals. The control unit includes obtaining a standard time interval from a cycle of a standard type of synchronization signal that has a longest pulse width, parsing for determining type of each synchronization signal, redefining supply power values corresponding to respective types of synchronization signals, and changing the setting of output power of the power supply unit to a supply power value corresponding to a type of the synchronization signal.
    Type: Application
    Filed: April 12, 2007
    Publication date: July 31, 2008
    Applicants: RUBYCON CORPORATION, PHOENIX Electric Co., Ltd.
    Inventors: Shiro Isobe, Tomotaka Mori, Toshitaka Fujii, Atsuji Nakagawa