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Electronic device and control method thereof

  • US 9,035,902 B2
  • Filed: 08/18/2011
  • Issued: 05/19/2015
  • Est. Priority Date: 08/19/2010
  • Status: Active Grant
First Claim
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1. A mobile phone, comprising:

  • a display panel;

    a touch panel;

    a sound output device;

    a housing means with a containing space to contain the sound output device, wherein the housing means has an inner surface;

    a conductive layer disposed on the inner surface of the housing means and adjacent to the sound output device and used for sensing a touch during a phone call and turning off the touch panel or backlight of the display panel when the touch is sensed;

    a charge-and-discharge circuit coupled to the conductive layer, wherein the charge-and-discharge circuit and the conductive layer are charged and discharged periodically according to a plurality of periodic pulses and output a sensing voltage; and

    a processing circuit coupled to the conductive layer and the charge-and-discharge circuit, comprising;

    a control unit for providing the periodic pulses to the-conductive layer and the charge-and-discharge circuit;

    a detecting unit for detecting the sensing voltage and deciding a charging time according to the sensing voltage, wherein the charging time is a time at which the sensing voltage reaches a predetermined voltage;

    a determining unit coupled to the detecting unit for deciding whether to trigger an interrupt request according to the charging time; and

    an executing unit coupled to the determining unit for turning off the touch panel or backlight of the display panel when the interrupt request is received;

    wherein the housing means is a cover plate with a cavity forming the containing space to contain the sound output device;

    wherein the conductive layer is disposed on a specific area of the inner surface of the housing means, and the specific area is adjacent to the cavity and is covered by a layer of colored material.

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