Touch sensing method and associated circuit

  • US 8,674,968 B2
  • Filed: 01/20/2010
  • Issued: 03/18/2014
  • Est. Priority Date: 06/29/2005
  • Status: Active Grant
First Claim
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1. A display controller fabricated on a semiconductor substrate, comprising:

  • a touch control circuit configured to detect whether a contact point is touched; and

    a pulse width modulation (PWM) circuit coupled to the touch control circuit and a lighting module, the PWM circuit configured to generate a PWM signal that controls operations of the lighting module,wherein the touch control circuit is configured to receive an image synchronous signal, andwherein, in response to receiving the image synchronous signal, the touch control circuit is configured to trigger the PWM circuit to generate the PWM signal.

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