US 11,991,466 B2
Data rate control for event-based vision sensor
Raphael Berner, Confignon (CH); Christian Brändli, Baden (CH); and Massimo Zannoni, Zurich (CH)
Assigned to Sony Advanced Visual Sensing AG, Schlieren (CH)
Filed by Sony Advanced Visual Sensing AG, Schlieren (CH)
Filed on Aug. 16, 2022, as Appl. No. 17/888,556.
Application 17/888,556 is a division of application No. 16/884,129, filed on May 27, 2020, granted, now 11,431,937.
Application 16/884,129 is a continuation of application No. 15/858,840, filed on Dec. 29, 2017, granted, now 10,715,750, issued on Jul. 14, 2020.
Prior Publication US 2022/0394205 A1, Dec. 8, 2022
Int. Cl. H04N 25/75 (2023.01); G01J 1/46 (2006.01); G06F 11/00 (2006.01); G06T 7/20 (2017.01); H04N 25/40 (2023.01); H04N 25/47 (2023.01); H04N 25/571 (2023.01); H04N 25/766 (2023.01); H04N 25/77 (2023.01); H04N 25/772 (2023.01)
CPC H04N 25/75 (2023.01) [G01J 1/46 (2013.01); G06F 11/004 (2013.01); G06T 7/20 (2013.01); H04N 25/40 (2023.01); H04N 25/47 (2023.01); H04N 25/573 (2023.01); H04N 25/766 (2023.01); H04N 25/77 (2023.01); H04N 25/772 (2023.01); G06F 2201/86 (2013.01); G06F 2201/88 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A change detection sensor, comprising:
a pixel array comprising a first pixel that detect light;
an event detectors for detecting ON events and OFF events associated with light received by the first pixel;
an event rate detector for assessing the ON events and OFF events separately;
a controller for separately controlling an ON event threshold and an OFF event threshold based on the event rate detector; and
a threshold generation circuit that outputs the ON event threshold and the OFF event threshold separately under the control of the controller;
wherein the event detector includes a comparator having a first input and a second input, in which the first input is coupled to the first pixel and the second input receives both the ON event threshold and the OFF event threshold serially in time from the threshold generation circuit.