Fingerprint identification device and method

A fingerprint identification device, comprising:

• a substrate;
• a plurality of electrode areas, each electrode area including:
• a plurality of electrodes disposed on the substrate along a first direction and a second direction, the first direction perpendicular to the second direction;
• a plurality of second directional signal lines extending along the second direction, the second directional signal lines corresponding to the electrodes;
• a plurality of electrode selection switch group, each electrode selection switch group including a plurality of selecting switch components, and each electrode selection switch group is corresponding to an electrode;
• a plurality of sensing and deflection signal selection switch groups, each sensing and deflection signal selection switch group is connected to the second directional signal lines;
• and
• at least one dedicated sensing signal line connected to the sensing and deflection signal selection switch groups in the electrode area;
• and
• a plurality of first directional signal lines extending along the first direction, the first directional signal lines corresponding to the electrodes in the electrode area,
• wherein the electrodes in each electrode area are sequentially or dynamically configured into at least three areas through the electrode selection switch groups and the sensing and deflection signal selection switch groups, the at least three areas being a sensing area, a deflection focusing area and a convergence stabilizing area, respectively, each deflection focusing area being composed of the electrodes surrounding each sensing area, each convergence stabilizing area being composed of the electrodes surrounding the deflection focusing area;
• a sensing stimulating signal is applied to the electrodes in each sensing area through the at least one dedicated sensing signal line in each electrode area;
• a deflection focusing signal is applied to the electrodes in the deflection focusing area in each electrode area;
• a convergence stabilizing signal is applied to the electrodes in the convergence stabilizing area in each electrode area;
• a sensing signal is outputted from the at least one dedicated sensing signal line in each electrode area to a self-capacitance sensing circuit for sensing a fingerprint, and
• wherein the convergence stabilizing signal applied to each electrode area is an inverted signal generated through a circuit from the sensing signal or the sensing stimulating signal in the corresponding sensing area.