OPTICAL FINGERPRINT SENSOR MODULE AND METHOD FOR OPERATING OPTICAL FINGERPRINT SENSOR MODULE

There is an optical biometric imaging device configured to capture an image of an object in contact with an outer surface of the biometric imaging device, the biometric imaging device comprising: an image sensor comprising a photodetector pixel array and image sensor circuitry configured to capture an image of the object in contact with the outer surface of the imaging device; the image sensor comprising a first electrically conductive structure arranged adjacent to an active sensing area of the photodetector pixel array; a display panel arranged on top of and at a distance from the image sensor, the display panel comprising a second electrically conductive structure on a bottom side of the display panel and arranged to face the first electrically conductive structure of the image sensor; and capacitive readout circuitry arranged and configured to detect a capacitance between the first electrically conductive structure and the second electrically conductive structure.