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TOUCH STYLUS CAPABLE OF DETECTING PRESSURE ON A TIP AND RELATED OPTICAL-MECHANICAL SYSTEM

  • US 20130257812A1
  • Filed: 10/26/2012
  • Published: 10/03/2013
  • Est. Priority Date: 03/28/2012
  • Status: Active Grant
First Claim
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1. A touch stylus capable of detecting pressure on its tip, the touch stylus comprising:

  • a body;

    a tip movably disposed on an end of the body; and

    a pressure sensing module disposed between the body and the tip for detecting the pressure on the tip, the pressure sensing module comprising;

    a lighting unit;

    a pressure sensing unit connected to the tip for detecting a movement of the tip relative to the body, so as to generate a corresponding electrical signal; and

    a controller electrically connected to the lighting unit and the pressure sensing unit for receiving the electrical signal, so as to drive the lighting unit to generate a corresponding optical signal, a scintillating frequency of the optical signal and a value of the electrical signal being in direct proportion;

    wherein the optical signal is transmitted to an optical detector disposed on a panel, and the optical detector transforms the scintillating frequency of the optical signal into the pressure on the tip.

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