Patents by Inventor Dop Chen

Dop Chen 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).

  • Driving device for objective lens of optical pickup
    Patent number: 7325243
    Abstract: The present invention discloses an electromagnetic driving device for an object lens of an optical pickup. The electromagnetic driving device comprises an object lens, a lens bearing seat, a focusing coil, a tracking coil, an auxiliary magnetic device, a base, a plurality of elastomers, and a top cover. The object lens, focusing coil, and tracking coil are fixed to the lens-bearing seat. The auxiliary magnetic device comprises a plurality of magnets fixed to the base. Each of the elastomers is attached to the lens-bearing seat and has an end fixed to the base. By utilizing electromagnetic forces generated by the coils and the auxiliary magnetic device, the object lens is moved to correct tracking deviations and focusing aberrations. The present invention enhances a utilization of the coils, which in turn improves a response time, and sensitivity of the electromagnetic driving device so that the optical pickup can be used in a high-speed optical recording device.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: January 29, 2008
    Assignee: TopRay Technologies, Inc.
    Inventors: Kirin Chang, Dop Chen
  • Driving device for objective lens of optical pickup
    Publication number: 20050254357
    Abstract: The present invention discloses an electromagnetic driving device for an object lens of an optical pickup. The electromagnetic driving device comprises an object lens, a lens bearing seat, a focusing coil, a tracking coil, an auxiliary magnetic device, a base, a plurality of elastomers, and a top cover. The object lens, focusing coil, and tracking coil are fixed to the lens-bearing seat. The auxiliary magnetic device comprises a plurality of magnets fixed to the base. Each of the elastomers is attached to the lens-bearing seat and has an end fixed to the base. By utilizing electromagnetic forces generated by the coils and the auxiliary magnetic device, the object lens is moved to correct tracking deviations and focusing aberrations. The present invention enhances a utilization of the coils, which in turn improves a response time, and sensitivity of the electromagnetic driving device so that the optical pickup can be used in a high-speed optical recording device.
    Type: Application
    Filed: May 11, 2004
    Publication date: November 17, 2005
    Inventors: Kirin Chang, Dop Chen