Patents by Inventor Kensuke Numakoshi

Kensuke Numakoshi 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).

  • Image projection system
    Patent number: 6882374
    Abstract: A DMD (4) as a image display device time divisionally displays channel images formed by separating an image into RGB channels. A white light emitted from a xenon lamp (1) is separated, by an acousto-optical element (3), into spectal components. Those spectal components are projected onto the DMD (4). A refractive index of the acousto-optical element (3) varies with a frequency of an ultrasonic wave applied thereto. Therefore, a color of the spectral component applied to the DMD (4) may be changed by varying the refractive index of the acousto-optical element. RGB monochromatic lights may be irradiated on the DMD (4) by setting the frequencies FR, FG, FB of the ultrasonic wave at appropriate values.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: April 19, 2005
    Assignee: Yamaha Corporation
    Inventor: Kensuke Numakoshi
  • Image projection system
    Publication number: 20020167647
    Abstract: A DMD (4) as a image display device time divisionally displays channel images formed by separating an image into RGB channels. A white light emitted from a xenon lamp (1) is separated, by an acousto-optical element (3), into spectal components. Those spectal components are projected onto the DMD (4). A refractive index of the acousto-optical element (3) varies with a frequency of an ultrasonic wave applied thereto. Therefore, a color of the spectral component applied to the DMD (4) may be changed by varying the refractive index of the acousto-optical element. RGB monochromatic lights may be irradiated on the DMD (4) by setting the frequencies FR, FG, FB of the ultrasonic wave at appropriate values.
    Type: Application
    Filed: May 7, 2002
    Publication date: November 14, 2002
    Inventor: Kensuke Numakoshi