Event vision sensors with digital event detection

Abstract

Event vision sensors with digital event detection (and associated systems, devices, and methods) are disclosed herein. In one embodiment, an image sensor includes an EVS pixel, an analog-to-digital converter (ADC), and event detection circuitry. The EVS pixel can include a photosensor, an integrating-type photo-detecting stage, and in-pixel sampling circuitry comprising a plurality of circuit branches that are each configured to perform correlated double sampling (CDS) operations to sample integrated irradiance levels. The ADC can be coupled to the in-pixel sampling circuitry and configured to convert the integrated irradiance levels into corresponding digital signals. The event detection circuitry can be coupled to the ADC and configured to generate event signals based at least in part on temporal contrast differences between the corresponding digital signals output by the ADC and a contrast threshold.

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