Patents by Inventor Jon H. Liu

Jon H. Liu 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).

  • BATTERY CALIBRATION SYSTEM FOR DISCHARGING A RECHARGEABLE BATTERY AND GENERATING AN AC DETECT SIGNAL TO POWER MANAGEMENT LOGIC TO MAINTAIN NORMAL COMPUTER OPERATION EVEN WHEN BATTERY IS BELOW CERTAIN LEVEL
    Patent number: 6463545
    Abstract: A laptop computer system executes automatic battery calibration to improve the accuracy of the battery's internal charge monitor. The calibration procedure drains the battery to approximately 0% of charge capacity during normal computer operation, permitting a user to operate the computer without risking power failure when the battery discharges. The computer returns to normal operation if either the AC power or the battery is removed. During the calibration procedure, the computer system prevents power management software from forcing shut down before the battery completely drains.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: October 8, 2002
    Assignee: Compaq Information Technologies Group, L.P.
    Inventors: Andrew J. Fisher, Steven D. Holehan, Jonathan E. James, Jon H. Liu, Thomas T. Pham, Donald G. Scharnberg