Fingerprint sensing method, fingerprint sensor, and display device including the same

A fingerprint sensing method of a fingerprint sensor comprising a substrate, a light blocking layer that is on a first surface of the substrate and includes openings in a light blocking mask, and a sensor layer that is on a second surface of the substrate and comprises photo sensors, the fingerprint sensing method comprising:

• storing a calibration image;
• generating an original image, based on sensing signals from the photo sensors;
• performing calibration on the original image by utilizing the calibration image;
• and
• detecting a fingerprint, based on the calibrated image,
• wherein the calibration image is generated by synthetizing valid regions extracted from an original calibration image corresponding to the original image.

A display device comprising:

• a substrate;
• a light blocking layer on a first surface of the substrate, the light blocking layer including openings in a light blocking mask;
• a circuit element layer on the light blocking layer, the circuit element layer having at least one conductive layer in which circuit elements are disposed;
• a light emitting element layer on the circuit element layer, the light emitting element layer comprising light emitting elements;
• a sensor layer on a second surface of the substrate, the sensor layer comprising photo sensors;
• and
• a fingerprint detector configured to generate an original image, based on sensing signals from the photo sensors, to perform calibration on the original image by utilizing a calibration image, and to detect a fingerprint, based on the calibrated image,
• wherein the calibration image is generated by synthesizing valid regions extracted from an original calibration image corresponding to the original image.