Patents by Inventor Mu-Shu Tsai

Mu-Shu Tsai 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).

  • Reading method of optical disc drive for reading disc and finding if disc is placed reversely
    Patent number: 7724623
    Abstract: A reading method for finding if a disc is placed reversely used in an optical disc drive is provided. The optical disc drive has a spindle motor, an optical pickup head having a lens, a fine actuator and a sled actuator. Firstly, a disc is placed into the optical disc drive. Next, the spindle motor rotates the disc. After that, a laser light of the optical pickup head is shot on the disc. Next, the lens is moved such that the laser light follows a single data track. Then, a central error signal of the lens is measured continuously. Afterwards, if the central error signal increases progressively, the optical disc drive finds the disc placed reversely, and the disc is ejected from the optical disc drive.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: May 25, 2010
    Assignee: Lite-on It Corporation
    Inventors: Po-Chuan Su, Yi-Chuan Pan, Mu-Shu Tsai
  • Reading method of optical disc drive for reading disc and finding if disc is placed reversely
    Publication number: 20080049564
    Abstract: A reading method for finding if a disc is placed reversely used in an optical disc drive is provided. The optical disc drive has a spindle motor, an optical pickup head having a lens, a fine actuator and a sled actuator. Firstly, a disc is placed into the optical disc drive. Next, the spindle motor rotates the disc. After that, a laser light of the optical pickup head is shot on the disc. Next, the lens is moved such that the laser light follows a single data track. Then, a central error signal of the lens is measured continuously. Afterwards, if the central error signal increases progressively, the optical disc drive finds the disc placed reversely, and the disc is ejected from the optical disc drive.
    Type: Application
    Filed: August 24, 2007
    Publication date: February 28, 2008
    Applicant: LITE-ON IT CORPORATION
    Inventors: Po-Chuan Su, Yi-Chuan Pan, Mu-Shu Tsai