Synaptics Incorporated
DISPLAY DEVICE WITH INTEGRATED FINGERPRINT SENSOR

Abstract:

A fingerprint sensing device integrated within a display device. The display device comprises source lines, monitor lines, gate lines, select lines, and subpixels. A first subpixel comprises first subpixel circuitry coupled to a first source electrode, a first monitor line, and a first gate line, and a first photodiode circuitry coupled to a first select line. The display device further comprises measurement circuitry coupled to the first subpixel via the first monitor line. The measurement circuitry is configured to receive a first current signal from the first subpixel circuitry during a first period via the first monitor line, receive a second current signal from the first photodiode circuitry during a second period via the first monitor line, and determine fingerprint data from the second current signal.