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Mobile terminal

  • US 8,519,962 B2
  • Filed: 10/21/2010
  • Issued: 08/27/2013
  • Est. Priority Date: 11/17/2009
  • Status: Expired due to Fees
First Claim
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1. A mobile terminal comprising:

  • a main body comprising a wireless communication module;

    a wireless keypad configured to operate in a tactile manner in order to input information via the main body; and

    a driving unit configured to control the wireless keypad using power of the main body,wherein the driving unit comprises;

    a first electrode located in the main body and a second electrode located in the wireless keypad;

    an electric field formation unit located in the main body and configured to apply voltage to the first electrode to generate an electric field between the first and second electrodes; and

    a controller located in the main body and configured to detect information related to a touch applied to the wireless keypad based on a change in the electric field between the first and second electrodes generated by the touch,wherein the wireless keypad comprises a touch pad having a plurality of conductive patterns connected to the second electrode for detecting the touch, andwherein each of the plurality of conductive patterns is connected to one of a plurality of resistors each having a different length such that each of the plurality of conductive patterns has a different impedance value.

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