Patents by Inventor David Loh

David Loh 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).

  • Patent number: 7430083
    Abstract: A method for monitoring a data storage medium is provided in which a virtual head fly profile is measured. In addition, a data storage device for implementing the monitoring method is provided.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: September 30, 2008
    Assignee: Seagate Technology LLC
    Inventors: David Loh, SanYuan Liew, Myint Ngwe, FongKheon Chong, EngHock Lim
  • Publication number: 20050270679
    Abstract: A motion control system has an enclosed assembly that encloses moving parts. A controller controls a motion of the moving parts and has an inhibit input that inhibits the motion. A sensor provides sensor outputs that depend on an assembly temperature and an assembly humidity in the enclosed assembly. A circuit provides a condensing condition output as a function of the sensor outputs. The condensing condition output couples to the inhibit input to inhibit the motion as a function of the sensor outputs.
    Type: Application
    Filed: June 2, 2004
    Publication date: December 8, 2005
    Inventors: Chew Victor, David Loh, Gan Liang, Djohni Chandra, Myint Ngwe
  • Publication number: 20050191172
    Abstract: An inducer rotor rotatably mountable in an inducer for pressurizing fluid traveling through the inducer. The inducer rotor includes a hub. The hub has a central axis and a plurality of blades extending radially outward from the hub. Each blade extends from a root portion that is next to the hub, to a tip portion that is opposite the root. The rotor further includes a shroud extending circumferentially between each pair of adjacent blades within the plurality of blades. The shroud has an inner surface facing the central axis and an outer surface that is opposite the inner surface. Between the inner and outer surface of the shroud is defined a thickness. The shroud thickness varies circumferentially around the shroud.
    Type: Application
    Filed: February 26, 2004
    Publication date: September 1, 2005
    Inventors: Sen Meng, David Loh
  • Patent number: 6731442
    Abstract: A method is disclosed for detecting defects in a recordable medium such as a hard disc drive based on error energy. The method may include the steps of writing test data to the medium and reading back the test data. The method may also include the steps of computing an error energy based on the square of the difference between the read back data and an ideal version of the test data and comparing the error energy with an energy threshold. The method generates a defect signal when the error energy exceeds the energy threshold. The method may also be used to identify the media defect according to its error energy profile. An apparatus for detecting defects in a recordable medium is also disclosed.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: May 4, 2004
    Assignee: Seagate Technologies LLC
    Inventors: Ming Jin, Myint Ngwe, David Loh, Quek Leong Choo, Mingyou Hu
  • Publication number: 20030218815
    Abstract: A method for monitoring a data storage medium is provided in which a virtual head fly profile is measured. In addition, a data storage device for implementing the monitoring method is provided.
    Type: Application
    Filed: April 2, 2003
    Publication date: November 27, 2003
    Inventors: David Loh, SanYuan Liew, Myint Ngwe, FongKheon Chong, EngHock Lim
  • Publication number: 20030063405
    Abstract: A method is disclosed for detecting defects in a recordable medium such as a hard disc drive based on error energy. The method may include the steps of writing test data to the medium and reading back the test data. The method may also include the steps of computing an error energy based on the square of the difference between the read back data and an ideal version of the test data and comparing the error energy with an energy threshold. The method generates a defect signal when the error energy exceeds the energy threshold. The method may also be used to identify the media defect according to its error energy profile. An apparatus for detecting defects in a recordable medium is also disclosed.
    Type: Application
    Filed: January 31, 2002
    Publication date: April 3, 2003
    Inventors: Ming Jin, Myint Ngwe, David Loh, Quek Leong Choo, Mingyou Hu