Patent ID: 11948394
Assignee: JAPAN DISPLAY INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 2:
3. A detection device comprising:
a pattern detector having a contact surface that allows an external object to make contact therewith and configured to detect a concavity and convexity pattern of a fingerprint when a human finger is pressed against the contact surface;
a force detector configured to detect force applied to the contact surface; and
a controller configured to perform user authentication processing based on the pattern detected by the pattern detector and the force detected by the force detector,
wherein
the controller is configured to
store in advance, reference data obtained by acquiring, at each of a plurality of timings when a human finger is pressed against the contact surface, acquisition target data including data related to the pattern detected by the pattern detector, data related to the force detected by the force detector, or both data,
acquire new data including the acquisition target data acquired at each of a plurality of timings when an external object is newly pressed against the contact surface, and
determine whether the object pressed against the contact surface when the new data is acquired is a human finger based on difference between the acquisition target data indicated by the reference data at the timings and the acquisition target data indicated by the new data at the timings,

the timings are two timings or more that are included in a pressing operation period from start to end of pressing of an external object against the contact surface, and the force detected by the force detector is different between the timings, and
the acquisition target data includes density data related to the size of a contact portion in which a contact of an external object is detected in a contact region between the contact surface and the external object relative to the size of a non-contact portion in which no contact of the external object is detected in the contact region.