Asynchronous pixel array with arbitration time error correction function

Abstract

An asynchronous pixel array with an arbitration time error correction function comprises a pixel array, a row arbitration selector connected with the pixel array, a row address coder connected with the row arbitration selector, a column arbitration selector connected with the pixel array, a column address coder connected with the column arbitration selector and an external communication preparation module which is respectively connected with the pixel array, the row address coder, the column address coder and an external processing module. The asynchronous pixel array with the arbitration time error correction function is further provided with a time error correction processing module which is respectively connected with the pixel array, the row address coder, the column arbitration selector, the column address coder and the external communication preparation module. The measurement of the time from request sending of a pixel to being selected by the arbitration selectors is achieved, and therefore the function of correcting time error caused by arbitration awaiting. Under the condition that light intensity is relatively large and an event occurrence rate is relatively high, the effect of improving accuracy is relatively remarkable.

Description

technical field [0001] The present invention relates to an asynchronous pixel array. In particular, it relates to an asynchronous pixel array with arbitration time error correction constituting a novel asynchronous CMOS image sensor. Background technique [0002] The asynchronous CMOS image sensor is a brand-new image sensor, which abandons the frame-based concept in the traditional image sensor, and replaces it with the AER (Address Event Representation, address event representation) communication method to realize the pixel according to the real-time light change. , independently and asynchronously output events, and use the time information of events to represent light information, which can overcome many shortcomings and deficiencies of traditional image sensors based on frame mode, such as large data redundancy, measurement speed limited by frame rate, etc. [0003] figure 1 Shown is the architecture of a newer existing asynchronous image sensor pixel array, which mai...

AI Technical Summary

Problems solved by technology

However, there is also a problem with this structure: when an event occurs in a pixel, the time from when the event occurs to when the event is output to the outside is uncertain

There is no good workaround for this time error

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