Patents by Inventor Seuk Ho Choi

Seuk Ho Choi 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 an optical disk device
    Patent number: 7787333
    Abstract: An apparatus and method for controlling an optical disk device performs a disk loading and unloading operation based on at least one driving signal containing multiple pulses of different widths. The pulses are applied to control a motor to unclamp the disk relative to a spindle. Because the signal is formed from multiple pulses of different widths, the unclamping operation is performed with little or no shock forces and as a result the disk is ejected without damage and without being dislodged from the device.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: August 31, 2010
    Assignee: Hitachi-LG Data Storage Korea, Inc.
    Inventors: Seuk Ho Choi, Kyu Tae Kang