Combined fingerprint recognition touch sensor, electronic apparatus including the same, and fingerprint enrollment method

A combined fingerprint recognition touch sensor comprising:

• a touch sensing region;
• a plurality of parallel transmission lines extending in a first direction through the touch sensing region;
• a plurality of parallel reception lines extending in a second direction through the touch sensing region to intersect the plurality of transmission lines;
• a signal transmitter comprising a plurality of transmission groups configured to apply driving signals to the plurality of parallel transmission lines, the plurality of transmission groups each comprising transmission lines, among the plurality of parallel transmission lines, arranged adjacent to each other;
• a signal outputter comprising a plurality of reception groups configured to receive signals from the plurality of parallel reception lines, the reception groups each comprising reception lines, among the plurality of parallel reception lines, arranged adjacent to each other;
• a storage configured to store an enrolled fingerprint image to be compared with a fingerprint image obtained for fingerprint authentication;
• and
• a controller configured to control operations of the signal transmitter and the signal outputter according to a fingerprint enrollment mode, a fingerprint recognition mode, and a touch sensing mode,
• wherein, in the fingerprint enrollment mode, a fingerprint image of a finger for enrollment is obtained through one touch operation by applying, by the signal transmitter, driving signals to transmission lines belonging to two or more transmission groups and obtaining the fingerprint image for enrollment from a sensing zone including an initial touch region and a surrounding region.