Patents by Inventor Daisuke Shirato

Daisuke Shirato 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).

  • Voice coil motor with magnet having protrusion
    Patent number: 8780502
    Abstract: A voice coil motor for a disk drive unit includes an external magnet and an actuator coil movably located above the external magnet. The external magnet has a main body with a magnetic north pole, a magnetic south pole and a transition surface therebetween, and further has a protrusion extending from the center part of the main body for increasing torque force, thereby improving the performance of the voice coil motor. The invention also discloses a disk drive unit including the same.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: July 15, 2014
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Daisuke Shirato, Da qing Huang, Huan yin Zhong
  • VOICE COIL MOTOR AND DISK DRIVE UNIT WITH THE SAME
    Publication number: 20120300345
    Abstract: A voice coil motor for a disk drive unit includes an external magnet and an actuator coil movably located above the external magnet. The external magnet has a main body with a magnetic north pole, a magnetic south pole and a transition surface therebetween, and further has a protrusion extending from the center part of the main body for increasing torque force, thereby improving the performance of the voice coil motor. The invention also discloses a disk drive unit including the same.
    Type: Application
    Filed: July 11, 2011
    Publication date: November 29, 2012
    Applicant: SAE Magnetics (H.K.) Ltd.
    Inventors: Daisuke SHIRATO, Da qing HUANG, Huan yin ZHONG
  • Projection type display apparatus and lamp cooling apparatus
    Patent number: 7237905
    Abstract: In an LCD projector or other projection type display apparatus which uses a lamp such as a xenon lamp for a light source, the lamp is cooled efficiently without increasing ambient noises or without causing the whole apparatus to become large-sized, and at the same time the lifetime and the reliability of a fan which cools the lamp is made improved. When fans 3 and 4 which are disposed on a front side of the lamp mounted with a heat sink 1 rotate, external air of ordinary temperature is taken inlet and guided into ducts 5 and 6 so as to be blown onto the front face of the lamp by means of the fans 3 and 4. Then, high temperature air which was warmed by being blown onto the lamp is exhausted from an outlet to the outside.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: July 3, 2007
    Assignee: Sony Corporation
    Inventors: Akihito Yajima, Hiroshi Nagai, Masami Sato, Yuji Kawasaki, Daisuke Shirato, Yoshihiko Okamura, Dai Yoneya, Takuji Ohkubo
  • Projection type display apparatus and lamp cooling apparatus
    Publication number: 20050036116
    Abstract: In an LCD projector or other projection type display apparatus which uses a lamp such as a xenon lamp for a light source, the lamp is cooled efficiently without increasing ambient noises or without causing the whole apparatus to become large-sized, and at the same time the lifetime and the reliability of a fan which cools the lamp is made improved. When fans 3 and 4 which are disposed on a front side of the lamp mounted with a heat sink 1 rotate, external air of ordinary temperature is taken in from an inlet and guided into ducts 5 and 6 so as to be blown onto the front face of the lamp by means of the fans 3 and 4. Then, high temperature air which was warmed by being blown onto the lamp is exhausted from an outlet to the outside.
    Type: Application
    Filed: July 8, 2004
    Publication date: February 17, 2005
    Inventors: Akihito Yajima, Hiroshi Nagai, Masami Sato, Yuji Kawasaki, Daisuke Shirato, Yoshihiko Okamura, Dai Yoneya, Takuji Ohkubo