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Display device specifying temperature distribution of display surface

  • US 10,068,538 B2
  • Filed: 07/09/2015
  • Issued: 09/04/2018
  • Est. Priority Date: 07/11/2014
  • Status: Active Grant
First Claim
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1. A display device comprising:

  • a display unit that displays an image;

    a plurality of electrodes arranged side by side in a first direction along a display surface of the display unit, the electrodes being a plurality of touch detection electrodes to perform touch detection;

    a touch detection circuit that detects a touch operation based on capacitance changes of the electrodes;

    a detecting unit that detects, to perform temperature distribution detection, one of an electric resistance of the electrodes, a voltage, and a current, the voltage and the current corresponding to the electric resistance;

    an applying unit that applies an electrical signal for touch detection to the electrodes;

    a plurality of switches each including a first switch and a second switch; and

    a specifying unit that specifies temperature distribution of the display surface based on the one of the electric resistance of the electrodes, the voltage, and the current, whereinthe electrodes include;

    a first electrode tapered toward one side in a second direction that is orthogonal to the first direction and that is along the display surface; and

    a second electrode tapered toward the other side opposite to the one side in the second direction, the first and second electrodes being alternately arranged side by side in the first direction,wherein the switches couple the electrodes to the touch detection circuit when the touch detection is performed, andwherein the switches couple to the electrodes to the applying unit and the detecting unit when the temperature distribution detection is performed.

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