Fingerprint identification apparatus

Abstract

A fingerprint identification apparatus comprises a contact image sensor (CIS) module, a keyswitch and a restoring unit. The keyswitch has a transparent plate for finger-tactility. The user put his finger on the transparent plate to move the transparent plate such that the keyswitch has relative movement with respect to the CIS module and the CIS module scans the fingerprint of user for fingerprint identification. The restoring unit is arranged on the keyswitch and provides restoring force to the keyswitch.

I claim  
     
         1 . A fingerprint identification apparatus, comprising 
 a contact image sensor (CIS) module;    a keyswitch having a transparent plate for finger-tactility and the keyswitch having relative movement with respect to the CIS module;    a restoring means arranged on the keyswitch to provide restoring force to the keyswitch.    
     
     
         2 . The fingerprint identification apparatus as in  claim 1 , wherein the CIS module is fixedly arranged on a base and the keyswitch is slidably fit on the base.  
     
     
         3 . The fingerprint identification apparatus as in  claim 1 , wherein the CIS module is movably arranged on a base; a link means composed of at least two link rod sets provided between the keyswitch and the base; the CIS module connected with the link rod sets; the keyswitch having vertical movement such that the link rod sets link the CIS module to move in horizontal direction.  
     
     
         4 . The fingerprint identification apparatus as in  claim 1 , wherein the CIS module is movably arranged on a base; a link means composed of a plurality of wedges being provided between the keyswitch and the base; the keyswitch having vertical movement such that the wedges link the CIS module to move in horizontal direction.  
     
     
         5 . The fingerprint identification apparatus as in  claim 4 , wherein a guiding stage is provided on the keyswitch and a guiding rod is provided on the base, the guiding rod being slidably fit into the guiding stage.  
     
     
         6 . The fingerprint identification apparatus as in  claim 1 , wherein the keyswitch is wholly composed of the transparent plate or partially composed of the transparent plate.  
     
     
         7 . The fingerprint identification apparatus as in  claim 1 , wherein the transparent plate further has a scale ruler to measure the fingerprint size.  
     
     
         8 . The fingerprint identification apparatus as in  claim 1 , wherein the restoring means is made of resilient element.