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1. WO2020229980 - EVENT-BASED VISION SENSOR USING ON/OFF EVENT AND GRAYSCALE DETECTION RAMPS

Publication Number WO/2020/229980
Publication Date 19.11.2020
International Application No. PCT/IB2020/054398
International Filing Date 08.05.2020
IPC
H04N 5/3745 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors
369SSIS architecture; Circuitry associated therewith
374Addressed sensors, e.g. MOS or CMOS sensors
3745having additional components embedded within a pixel or connected to a group of pixels within a sensor matrix, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
H04N 5/369 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors
369SSIS architecture; Circuitry associated therewith
CPC
H04N 5/37455
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors [SSIS]
369SSIS architecture; Circuitry associated therewith
374Addressed sensors, e.g. MOS or CMOS sensors
3745having additional components embedded within a pixel or connected to a group of pixels within a sensor matrix, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
37455comprising A/D, V/T, V/F, I/T or I/F converters
H04N 5/379
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors [SSIS]
369SSIS architecture; Circuitry associated therewith
379Details of the architecture or circuitry being divided to different or multiple substrates, chips or circuit boards, e.g. stacked image sensors
Applicants
  • SONY ADVANCED VISUAL SENSING AG [CH]/[CH]
Inventors
  • BRÄNDLI, Christian
  • BERNER, Raphael
Priority Data
62/846,28310.05.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) EVENT-BASED VISION SENSOR USING ON/OFF EVENT AND GRAYSCALE DETECTION RAMPS
(FR) CAPTEUR DE VISION BASÉ SUR UN ÉVÉNEMENT UTILISANT DES RAMPES DE DÉTECTION D'ÉVÉNEMENT MARCHE/ARRÊT ET D'ÉCHELLE DE GRIS
Abstract
(EN)
A dynamic vision sensor such as an event based vision sensor employs analog to digital converters (ADC), such as ramp ADCs, that analog to digital converts the signals from photoreceptors. Only previous light values need to be stored in the pixels. This is accomplished by generating three ramps. In addition, log compression can be implemented by increasing the count linearly while increasing the reference voltage exponentially, or increasing the count logarithmically while increasing the reference voltage linearly.
(FR)
Un capteur de vision dynamique, tel qu'un capteur de vision basé sur un événement, utilise des convertisseurs analogique-numérique (CAN), tels que des CAN de rampe, lesdits convertisseurs analogique/numérique convertissant les signaux provenant de photorécepteurs. Seules les valeurs de lumière précédentes doivent être stockées dans les pixels. Ceci est obtenur par génération de trois rampes. De plus, la compression logarithmique peut être mise en oeuvre en augmentant le comptage linéairement tout en augmentant la tension de référence de manière exponentielle, ou en augmentant le comptage de manière logarithmique tout en augmentant linéairement la tension de référence.
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