Electronic device and fingerprint sensing method

An electronic device, comprising:

• a display panel comprising a plurality of pixel units arranged in an array;
• a fingerprint sensor disposed below a sensing area of the display panel;
• and
• an integrated driver chip coupled to the display panel and the fingerprint sensor and integrated with a display driver circuit and a fingerprint sensing circuit, wherein the display driver circuit is configured to drive the display panel, and the fingerprint sensing circuit is configured to drive the fingerprint sensor,
• wherein when the pixel units of the display panel are in an undriven state and a finger object is in contact with the sensing area of the display panel to perform a fingerprint unlock operation, the display driver circuit drives at least one portion of the pixel units corresponding to the sensing area such that the at least one portion of the pixel units provide an illumination light to the sensing area, where the at least one portion of the driven pixel units of the display panel in the sensing area continuously displays a plurality of light source patterns having different periodic variation patterns, and the fingerprint sensing circuit drives the fingerprint sensor to capture a plurality of fingerprint feature images of the finger object,
• wherein the fingerprint sensing circuit superimposes the fingerprint feature images to generate a recombined fingerprint feature image,
• wherein each one of the plurality of light source pattern comprises a plurality of bright area patterns arranged separately, and there is at least one dark area pattern between any indirectly adjacent two bright patterns area in the plurality of bright area patterns,
• wherein each of the plurality of bright area patterns is composed of a plurality of directly adjacent illuminated pixel units arranged continuously and non-intermittently, and there is no dark area pattern between any consecutive two directly adjacent illuminated pixel units in the each of the plurality of bright area patterns.