Patents by Inventor Hant Shen

Hant Shen 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).

  • Method and apparatus for controlling the disk tray by detecting the back emf force
    Patent number: 6922378
    Abstract: This invention relates specifically to a method for controlling the disc tray of a data reproducing device, in which the data reproducing device comprises at least a tray motor for driving the disc tray. The method comprises the following steps, including: a step for disposing a detection circuit electrically connected with the motor for detecting a back emf, which is generated when the motor is driven to rotate by an external force; a step for outputting from the detection circuit a signal of moving disc tray when the back emf is sensed; a step for a servo-controller to receive a signal of moving disc tray; and a step for the servo-controller to move the disc tray into the data reproducing device after the signal reception is completed.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: July 26, 2005
    Assignee: Behavior Tech Computer Corporation
    Inventor: Hant Shen
  • Method for controlling the disc tray of a data reproducing device of tray type and the data reproducing device thereof
    Publication number: 20040114476
    Abstract: This invention relates specifically to a method for controlling the disc tray of a data reproducing device, in which the data reproducing device comprises at least a tray motor for driving the disc tray. The method comprises the following steps, including: a step for disposing a detection circuit electrically connected with the motor for detecting a back emf, which is generated when the motor is driven to rotate by an external force; a step for outputting from the detection circuit a signal of moving disc tray when the back emf is sensed; a step for a servo-controller to receive a signal of moving disc tray; and a step for the servo-controller to move the disc tray into the data reproducing device after the signal reception is completed.
    Type: Application
    Filed: January 31, 2003
    Publication date: June 17, 2004
    Inventor: Hant Shen