Optical fingerprint sensing device

The utility model provides an optical fingerprint sensing device which comprises a sensing pixel array and a processing circuit. The sensing pixel array includes P * Q sensing pixel units. The sensing pixel units are arranged in a plurality of rows and a plurality of columns, and each sensing pixel unit correspondingly outputs a sensing signal. The processing circuit is coupled to the sensing pixel array and configures a plurality of gain parameters. The processing circuit generates a fingerprint image based on the sensing signal output by each sensing pixel unit and the gain parameter, wherein the fingerprint image comprises M * N image pixels. The image pixels of the fingerprint image are respectively associated with gain parameters. The processing circuit configures one of the gain parameters to be different from another of the gain parameters. The optical fingerprint sensing device of the utility model can improve the phenomenon that the brightness of the fingerprint image is not uniform, thereby improvin