Patents by Inventor Navin E. Prabhu

Navin E. Prabhu 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).

  • Data storage device adjusting laser input power to compensate for temperature variations
    Patent number: 9025421
    Abstract: A data storage device is disclosed comprising a head actuated over a disk, wherein the head comprises a laser configured to heat the disk while writing data to the disk. A temperature is measured, and a first input power is generated based on a first function of the measured temperature, wherein the first function compensates for a temperature dependent output power of the laser. A second input power is generated based on a second function of the measured temperature, wherein the second function compensates for a temperature dependent coercivity of the disk. The first input power is combined with the second input power to generate a write power applied to the laser while writing data to the disk.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: May 5, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventors: Navin E. Prabhu, Phillip S. Haralson, Galvin T. Chia