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Fingerprint detection device and method and associated touch control device with fingerprint detection

  • US 20100098303A1
  • Filed: 12/23/2008
  • Published: 04/22/2010
  • Est. Priority Date: 10/17/2008
  • Status: Active Grant
First Claim
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1. A fingerprint detection device comprising:

  • a plurality of detecting units, each of which comprises a fingerprint electrode and a storage capacitor coupled to the fingerprint electrode, wherein a sense capacitor formed between the fingerprint electrode and a finger is parallel connected to the storage capacitor;

    a driving circuit, coupled to the detecting units, for providing a charging signal to charge an equivalent capacitor within each of the detecting units, wherein a capacitance of the equivalent capacitor is determined according to whether the sense capacitor is formed within the detecting unit; and

    a reading circuit, coupled to the detecting units, for reading a voltage of the storage capacitor of each of the detecting units after the equivalent capacitor is charged.

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