Method for fingerprint sensing in an electronic module capable of fingerprint sensing, electronic module capable of fingerprint sensing, and computing apparatus

An electronic module capable of fingerprint sensing, for being coupled to a fingerprint sensor having a plurality of fingerprint sensing pixels, the electronic module comprising:

• a fingerprint sensing driver circuit including:
• a fingerprint sensing circuit for being coupled to the fingerprint sensor and obtaining fingerprint sensing data, the fingerprint sensing circuit including an analog front-end stage;
• and
• a control unit, coupled to the fingerprint sensing circuit, for fingerprint sensing, wherein the control unit is configured to perform operations including:
• performing a first scanning operation on at least a first portion of the fingerprint sensing pixels by using a first reference signal being applied to a reference terminal of the analog front-end stage to obtain a level of a second reference signal based on a sensing result of the first scanning operation;
• and
• performing a second scanning operation on at least a second portion of the fingerprint sensing pixels by using a second reference signal being applied to the reference terminal of the analog front-end stage, wherein the second reference signal is different from the first reference signal.

A computing apparatus comprising:

• a display panel with a fingerprint sensor;
• an electronic module capable of fingerprint sensing, coupled to the display panel, the electronic module comprising:
• a fingerprint sensing driver circuit including:
• a fingerprint sensing circuit for being coupled to the fingerprint sensor and obtaining fingerprint sensing data, including an analog front-end stage;
• and
• a control unit, coupled to the fingerprint sensing circuit, for fingerprint sensing, wherein the control unit is configured to:
• perform a first scanning operation on at least a first portion of the fingerprint sensing pixels by using a first reference signal being applied to a reference terminal of the analog front-end stage to obtain a level of a second reference signal based on a sensing result of the first scanning operation;
• and
• perform a second scanning operation on at least a second portion of the fingerprint sensing pixels by using a second reference signal being applied to the reference terminal of the analog front-end stage, wherein the second reference signal is different from the first reference signal.