Patents Assigned to Psion Digital Limited
  • Computer with a pen or touch sensitive display
    Patent number: 8050017
    Abstract: A computer with a touch sensitive or pen sensitive display is disclosed in which the position of the fully opened display has been designed in order that the torque typically applied to the top most pen or touch sensitive part of the display, in relation to a rotational axis about which the computer would rotate if it were to tip backwards, is less than that needed to cause the computer to tip backwards about that rotational axis. The computer is therefore stable even when the display is being touched by pen or finger, unlike conventional clam shell designs.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: November 1, 2011
    Assignee: Psion Digital Limited
    Inventor: Martin Philip Riddiford
  • COMPUTER WITH A PEN OR TOUCH SENSITIVE DISPLAY
    Publication number: 20080174569
    Abstract: A computer with a touch sensitive or pen sensitive display is disclosed in which the position of the fully opened display has been designed in order that the torque typically applied to the top most pen or touch sensitive part of the display, in relation to a rotational axis about which the computer would rotate if it were to tip backwards, is less than that needed to cause the computer to tip backwards about that rotational axis. The computer is therefore stable even when the display is being touched by pen or finger, unlike conventional clam shell designs.
    Type: Application
    Filed: March 25, 2008
    Publication date: July 24, 2008
    Applicant: Psion Digital Limited
    Inventor: MARTIN PHILIP RIDDIFORD
  • Computer with a pen or touch sensitive display
    Patent number: 7355843
    Abstract: A computer with a touch sensitive or pen sensitive display is disclosed in which the position of the fully opened display has been designed in order that the torque typically applied to the top most pen or touch sensitive part of the display, in relation to a rotational axis about which the computer would rotate if it were to tip backwards, is less than that needed to cause the computer to tip backwards about that rotational axis. The computer is therefore stable even when the display is being touched by pen or finger, unlike conventional clam shell designs.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: April 8, 2008
    Assignee: Psion Digital Limited
    Inventor: Martin Philip Riddiford
  • Power management method and apparatus for use in electronic devices
    Patent number: 7127627
    Abstract: A combination portable computer and mobile telephone device sends the portable computer portion into a sleep mode during periods of non-use; it can periodically and temporarily wake itself up so as to monitor the power consumption of a slave device, the mobile telephone, which depends on the same battery or power source.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: October 24, 2006
    Assignee: Psion Digital Limited
    Inventor: Abul Basher Khan
  • Keyboard for an electronic device
    Patent number: 6812862
    Abstract: An electronic device comprising a keyboard in which one or more key caps each overlie a switch, the switch being activated when a key cap is depressed a predetermined amount, in which a key cap is directly joined to a key mat at a first section.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: November 2, 2004
    Assignee: Psion Digital Limited
    Inventor: Mark Dempsey