Patent ID: 11861935
Assignee: SILEAD INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 12:
13. A fingerprint module, comprising:
a detection area which is divided into a plurality of detection blocks, wherein each of the detection blocks comprises a plurality of detection units, and each of the detection units is corresponding to a grayscale value; and
a hardware circuit comprising:
a scan module configured to scan at least part of the detection blocks to obtain the grayscale values;
a coverage determination module configured to determine whether each of the detection blocks is in a covered state based on the grayscale values, and configured to:
accumulate the grayscale value of each of the detection units in the detection block to obtain a block grayscale value; and
determine that the detection block is in the covered state, in response to the block grayscale value is not greater than a gray detection threshold;

a counting module configured to count a number of the detection blocks in the covered state; and
an interruption module configured to send a collection request to a host to inform the host to obtain a fingerprint image in response to the number is not less than a coverage block threshold.