×

Backlight module with integrated pressure sensor

  • US 10,234,984 B2
  • Filed: 10/18/2016
  • Issued: 03/19/2019
  • Est. Priority Date: 07/27/2015
  • Status: Active Grant
First Claim
Patent Images

1. A smartphone comprising:

  • a first cover layer;

    an LCD panel located under the first cover layer and comprising a liquid crystal layer, a first glass layer, and a second glass layer, the liquid crystal layer located between the first glass layer and the second glass layer;

    a backlight unit located under the LCD panel and comprising an optical film, a light source, a reflective sheet, and a second cover layer; and

    a touch sensor which senses touch in a capacitive manner;

    wherein the backlight unit further comprises a pressure sensor and a spacer layer, the pressure sensor comprising a plurality of electrodes formed in a single layer attached on the second cover layer and spaced apart from the reflective sheet, the pressure sensor located between the reflective sheet and the second cover layer;

    wherein a driving signal is applied to the touch sensor and a touch position is detected by a sensing signal output from the touch sensor;

    wherein a magnitude of a touch pressure is detected based on a change amount of capacitance that is output from the pressure sensor and that is changed according to a distance between the pressure sensor and an electrode located within the LCD panel, wherein the electrode in the LCD panel functions as a noise blocking layer for the LCD panel or the electrode located within the LCD panel is a common electrode within the LCD panel;

    wherein the LCD panel is bent according to the touch; and

    wherein the change amount of the capacitance output from the pressure sensor changes as the LCD panel bends.

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