×

Portable electronic device and method for waking up the same from sleep mode through touch screen

  • US 9,075,474 B2
  • Filed: 10/30/2009
  • Issued: 07/07/2015
  • Est. Priority Date: 11/28/2008
  • Status: Active Grant
First Claim
Patent Images

1. A portable electronic device, comprising:

  • a central processor, capable of operating in a sleep mode and a normal operation mode;

    a display, having a display area for displaying information;

    a touch screen, overlaid on the display and having a first touch area, a second touch area, a first electrode extending from the first touch area to the second touch area along a first direction, and a second electrode extending along a second direction substantially perpendicular to the first direction, wherein the first touch area and the second touch area are respectively formed by a part of the touch screen, the first touch area is electrically connected to the second touch area through the first electrode, and the second touch area extends along the second direction and is close to the second electrode; and

    a micro processing unit, electrically connected to the first electrode, wherein when the central processor is operated in the sleep mode, the micro processing unit is for;

    detecting a touch signal from the first electrode;

    comparing a voltage value corresponding to the touch signal with a predetermined value to obtain a comparison result;

    determining which one of the first touch area and the second touch area senses a touch according to the comparison result; and

    outputting a wake-up signal to the central processor to switch the central processor from the sleep mode to the normal operation mode when the second touch area senses the touch,and when the central processor is operated in the sleep mode and the first touch area senses the touch, the micro processing unit does not output the wake-up signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×