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Event-driven image sensor and method of reading the same

An event-driven, sensor-based technology, applied in the field of sensor arrays, can solve problems such as energy efficiency and non-optimal speed gain

Pending Publication Date: 2021-10-29
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem is that state-of-the-art implementations of event-driven sensors are relatively complex, which means that the gains in terms of energy efficiency and speed are far from optimal

Method used

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  • Event-driven image sensor and method of reading the same
  • Event-driven image sensor and method of reading the same
  • Event-driven image sensor and method of reading the same

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Embodiment Construction

[0035] In the various figures, similar features have been designated by similar reference numerals. In particular, common structural and / or functional features among the various embodiments may have the same reference numerals and may be arranged with the same structure, dimensions and material properties.

[0036] For purposes of clarity, only those operations and elements that are useful for understanding the embodiments described herein have been shown and described in detail. In particular, some embodiments described herein relate to image sensors, such as RGB (red, blue, green) sensors, while other embodiments relate to time-of-flight based so-called depth sensors. The technical implementation of these two types of sensors is well known to those skilled in the art and is not described in detail.

[0037] Unless otherwise indicated, when referring to two elements connected together, this means that there is no direct connection of any intermediate elements other than cond...

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Abstract

The present disclosure relates to an event-driven sensor comprising: a pixel array (102); a column readout circuit (104) comprising, for each of the column output lines, a column register cell (108) configured to activate a column event output signal (addrx) when it receives a first token while the detection of an event is indicated on the column output line; and a row readout circuit (106) comprising, for each of the row output lines, or for each of a plurality of sub-groups of the row output lines, a row register cell (108) configured to activate a row event output signal (addry) when it receives a second token while an event is indicated on the row output line, or on one of the row output lines of the sub-group.

Description

technical field [0001] The present disclosure relates generally to the field of sensor arrays for image or depth detection, and more particularly to event-driven pixel arrays and methods of reading them. Background technique [0002] An image sensor comprising an array of imaging pixels is capable of detecting illumination from an image scene and is capable of temporarily storing an electrical signal (typically an amount of charge) at each pixel representing the detected illumination. The signals stored at the pixels are typically read out row by row across the array in a synchronous manner. [0003] The disadvantage of this readout method is that it is relatively time-consuming and energy-intensive, especially for large pixel arrays. Furthermore, in many applications, especially those involving some degree of scene tracking, there may be relatively long periods of time during which there are no points of interest to capture, and / or at any given time There may be only one ...

Claims

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Application Information

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IPC IPC(8): H04N5/369H04N5/378
CPCH04N25/70H04N25/75H04N25/40H04N25/767H04N25/76
Inventor 约瑟普·塞古拉·普卡德斯
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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