US 12,217,123 B2
Flicker mitigation for multiple interspersed illumination systems
Przemyslaw Kowalewski, Rocky Point, NY (US); Darran Michael Handshaw, Sound Beach, NY (US); Robert W. DiGiovanna, Shirley, NY (US); Mark D. Anderson, Dix Hills, NY (US); Eugene B. Joseph, Coram, NY (US); Mark Drzymala, Saint James, NY (US); and Miguel Orlando Rodriguez Ortiz, Coram, NY (US)
Assigned to Zebra Technologies Corporation, Lincolnshire, IL (US)
Filed by ZEBRA TECHNOLOGIES CORPORATION, Lincolnshire, IL (US)
Filed on Jan. 23, 2023, as Appl. No. 18/100,304.
Application 18/100,304 is a continuation of application No. 16/676,398, filed on Nov. 6, 2019, granted, now 11,562,161.
Prior Publication US 2023/0161984 A1, May 25, 2023
Int. Cl. G06K 7/10 (2006.01)
CPC G06K 7/10752 (2013.01) [G06K 7/10732 (2013.01); G06K 7/10742 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of activating an illumination assembly within a symbology reader, the illumination assembly having a first illumination source and a second illumination source, the first illumination source being configured to illuminate an illumination target with visible light, and the second illumination source being configured to illuminate the illumination target with non-visible light, the symbology reader having an imaging sensor configured to operate at a predetermined framerate where each frame includes an exposure period over which the imaging sensor is active to capture image data and a non-exposure period over which the imaging sensor is not active to capture image data, the method comprising:
(a) during a first frame, activating the first illumination source during at least a portion of the respective exposure period and activating the second illumination source over at least a portion of the respective non-exposure period such that the first illumination source is not activated at the same time as the second illumination source; and
(b) during a second frame, activating the second illumination source during at least a portion of the respective exposure period and activating the first illumination source over at least a portion of the respective non-exposure period such that the first illumination source is not activated at the same time as the second illumination source.