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Smartphone capable of detecting touch position and pressure

  • US 9,578,148 B2
  • Filed: 07/06/2015
  • Issued: 02/21/2017
  • Est. Priority Date: 09/19/2014
  • Status: Active Grant
First Claim
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1. A smartphone comprising:

  • a cover layer;

    an LCD panel which is located under the cover layer and comprises a liquid crystal layer, and a first glass layer and a second glass layer between which the liquid crystal layer is placed, wherein at least a portion of a touch sensor which senses touch in a capacitive manner is located between the first glass layer and the second glass layer;

    a backlight unit which is located under the LCD panel;

    a pressure electrode which is located under the backlight unit;

    a shielding member which is located under the pressure electrode; and

    a converter which converts a signal comprising information for a change amount of capacitance outputted from the pressure electrode to a digital signal,wherein the touch sensor comprises a plurality of drive electrodes and a plurality of receiving electrodes,wherein a driving signal is applied to the touch sensor and a touch position is detected from a sensing signal which is outputted from the touch sensor,wherein a magnitude of a touch pressure is detected from the digital signal,wherein a reference potential layer is located within a display module comprising the LCD panel and the backlight unit,and wherein the capacitance change amount changes depending on a distance between the pressure electrode and the reference potential layer.

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