Optical Fingerprint Recognition System and Fingerprint Image Capturing Method

摘要

An optical fingerprint recognition system is disclosed. The optical fingerprint recognition system comprises a processing circuit; and an image sensor comprising a pixel array; wherein in an enrollment operation, the processing circuit is configured to set a first exposure time and control the image sensor to capture a first fingerprint image according to the first exposure time and in a matching operation, the processing circuit is configured to set a second exposure time and control the image sensor to capture a second fingerprint image for the matching operation according to a second exposure time; wherein the first exposure time is longer than the second exposure time.