NARROW ARRAY CAPACITIVE FINGERPRINT IMAGE PICKUP DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a small-sized and inexpensive fingerprint sensor. SOLUTION: This fingerprint sensing system is provided with an array composed of capacitive sensing elements and the array is provided with a first dimension which is almost the width of a fingerprint and a second dimension shorter than the length of the fingerprint. A scanning control unit is connected so as to scan the array at a scanning speed decided by the moving speed of a finger on the array and the scanning control unit scans the array and captures a partial fingerprint image. Output logic is connected to the array so as to assemble the captured fingerprint image to a complete fingerprint image based on the moving direction of the finger on the array. A mouse device is positioned adjacently to the array within the moving route of the finger on the array.