US 11,941,908 B2
Optical fingerprint module and signal processing method
Zhongsheng Jiang, Beijing (CN)
Assigned to BEIJING XIAOMI MOBILE SOFTWARE CO., LTD., Beijing (CN)
Filed by BEIJING XIAOMI MOBILE SOFTWARE CO., LTD., Beijing (CN)
Filed on Mar. 18, 2021, as Appl. No. 17/205,342.
Claims priority of application No. 202010556453.8 (CN), filed on Jun. 17, 2020.
Prior Publication US 2021/0397807 A1, Dec. 23, 2021
Int. Cl. G06V 40/13 (2022.01); A61B 5/024 (2006.01); A61B 5/145 (2006.01); G06F 3/041 (2006.01); G06F 3/042 (2006.01)
CPC G06V 40/1318 (2022.01) [A61B 5/024 (2013.01); A61B 5/14542 (2013.01); G06F 3/0412 (2013.01); G06F 3/0421 (2013.01)] 16 Claims
OG exemplary drawing
 
7. An electronic device, comprising:
a touch and display module and an optical fingerprint module, wherein an assembly position of the optical fingerprint module corresponds to a fingerprint recognition region formed on the touch and display module; and the optical fingerprint module comprises:
a light sensing unit, configured to collect a light signal;
a signal processing unit, connected to the light sensing unit and configured to generate at least one of a fingerprint signal and a health signal by processing the light signal collected by the light sensing unit; and
a control unit, connected to the signal processing unit and configured to generate fingerprint information for fingerprint recognition based on the fingerprint signal output by the signal processing unit and generate health parameter information based on the health signal output by the signal processing unit;
wherein the light sensing unit comprises a fingerprint sensor, in which the fingerprint sensor is configured to collect the light signal for the fingerprint recognition and further configured to collect at least one of red light and green light for health testing;
the signal processing unit comprises:
a fingerprint signal processing circuitry, connected to the control unit and configured to obtain the fingerprint signal by processing the light signal collected by the fingerprint sensor; and at least one of:
a red light signal processing circuitry, connected to the control unit and configured to obtain a red light signal by processing the red light collected by the fingerprint sensor; and a green light signal processing circuitry, connected to the control unit and configured to obtain a green light signal by processing the green light collected by the fingerprint sensor; and
the optical fingerprint module further comprises:
a first circuit gating switch, configured to directly connect the fingerprint sensor to the fingerprint signal processing circuitry in response to the light signal collected by the fingerprint sensor is visual light signal, directly connect the fingerprint sensor to the red light signal processing circuitry in response to the light signal collected by the fingerprint sensor is red light signal, and directly connect the fingerprint sensor to the green light signal processing circuitry in response to the light signal collected by the fingerprint sensor is green light signal; and
the control unit is configured to generate the fingerprint information for the fingerprint recognition based on the fingerprint signal output by the fingerprint signal processing circuitry, generate the health parameter information based on the red light signal output by the red light signal processing circuitry, or generate the health parameter information based on the green light signal output by the green light signal processing circuitry.