US 10,509,940 B2
Electronic device including sequential operation of light source subsets while acquiring biometric image data and related methods
Mohammad Yeke Yazdandoost, San Jose, CA (US); Giovanni Gozzini, Berkeley, CA (US); and Dale R. Setlak, Merritt Island, FL (US)
Assigned to APPLE INC., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Sep. 28, 2017, as Appl. No. 15/718,828.
Prior Publication US 2019/0095671 A1, Mar. 28, 2019
Int. Cl. G06K 9/00 (2006.01); G06K 9/20 (2006.01)
CPC G06K 9/0004 (2013.01) [G06K 9/2027 (2013.01); G06K 9/2036 (2013.01)] 27 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a dielectric cover layer defining a finger sensing surface;
at least one optical image sensor below the dielectric cover layer;
at least one optical element associated with the at least one optical image sensor;
a plurality of light sources below the dielectric cover layer and selectively operable in subsets of light sources; and
a controller configured to sequentially operate the subsets of light sources in a first pass in a first direction, and in a second pass in a second direction transverse to the first direction while acquiring biometric image data from the at least one optical image sensor.