US 9,811,713 B2
Secure human fingerprint sensor
Bo Pi, Carlsbad, CA (US); and Yi He, San Diego, CA (US)
Assigned to Shenzhen Goodix Technology Co., Ltd., Shenzhen (CN)
Filed by Shenzhen Huiding Technology Co., Ltd., Shenzhen (CN)
Filed on Nov. 24, 2014, as Appl. No. 14/552,459.
Claims priority of provisional application 61/908,026, filed on Nov. 22, 2013.
Claims priority of provisional application 62/031,833, filed on Jul. 31, 2014.
Prior Publication US 2015/0146944 A1, May 28, 2015
Int. Cl. G06K 9/00 (2006.01); G06F 21/32 (2013.01); G06F 21/83 (2013.01); H04L 29/06 (2006.01)
CPC G06K 9/00087 (2013.01) [G06F 21/32 (2013.01); G06F 21/83 (2013.01); G06K 9/0004 (2013.01); G06K 9/00053 (2013.01); H04L 63/0861 (2013.01)] 32 Claims
OG exemplary drawing
 
1. A method for authenticating a request to access a locked mobile device equipped with a fingerprint detection module, the method comprising:
operating a contact monitoring sensor on the mobile device to monitor when the contact monitoring sensor is touched to activate the fingerprint detection module to acquire a pattern of a fingerprint and when the contact monitoring sensor is not touched to deactivate the fingerprint detection module to not acquire a pattern of a fingerprint, wherein the fingerprint detection module includes a different sensor from the contact monitoring sensor;
responsive to detecting a contact from an object with the fingerprint detection module based on output from the contact monitoring sensor, operating an optical detection module within the fingerprint detection module to direct probe light to the object and to detect light from the object to extract blood oxygen level information associated with a heartbeat of a living person from the detected light for determining whether the detected contact from the object is from human skin of a living person;
responsive to determining that the detected contact from the object is from human skin, operating an image capturing module within the fingerprint detection module that is separated from the optical detection module to capture a spatial pattern of a contact part of the object for detecting fingerprint data;
comparing the detected fingerprint data from the image capturing module against stored fingerprint profiles associated with an authorized user of the locked mobile device; and
granting or denying the request to access the locked mobile device based on whether the heartbeat is present in the object based on detection by the optical detection module and the comparison of the detected fingerprint data from the image capturing module to stored fingerprint profiles associated with an authorized user of the locked mobile device.