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TOUCH DETECTION DEVICE AND DISPLAY DEVICE HAVING TOUCH DETECTION FUNCTION

  • US 20150364117A1
  • Filed: 06/09/2015
  • Published: 12/17/2015
  • Est. Priority Date: 06/13/2014
  • Status: Active Grant
First Claim
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1. A touch detection device comprising:

  • a plurality of drive electrodes;

    a plurality of detection electrodes provided to generate capacitances with the drive electrodes;

    a display driver configured to perform a touch scanning drive by supplying a touch drive signal having pulses for detecting proximity of an external object to a target drive electrode, which is selected from the drive electrodes; and

    a touch driver configured to transmit and receive a signal to and from the display driver, output a drive synchronizing signal for producing the touch drive signal to the display driver, and acquire detection signals from the detection electrodes at timing corresponding to inputting of the touch drive signal, to detect the proximity of the external object,wherein at least one of the number of pulses of the drive synchronizing signal and a pulse width of each of the pulses of the drive synchronizing signal is determined based on the signal received from the display driver.

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