公开(公告)号：US20220264050A1

公开(公告)日：2022-08-18

申请号：US17662412

申请日：2022-05-06

Applicant: Prophesee SA

Inventor： Thomas FINATEU ,  Daniel MATOLIN ,  Christoph POSCH

IPC: H04N5/3745 ,  H04N5/378 ,  H04N5/369 ,  H04N5/345 ,  H04N5/355

Abstract: The present disclosure generally relates to image sensors and methods for image sensing. More specifically, and without limitation, this disclosure relates to systems and methods for providing super-pixels, and implementing and using image sensors with super-pixels. In one implementation, an image sensor includes a plurality of super-pixels. Each super-pixel may include a first photosensitive element; a detector electrically connected to the first photosensitive element and configured to generate a trigger signal when an analog signal proportional to brightness of light impinging on the first photosensitive element matches a condition; a second photosensitive element; an exposure measurement circuit electrically connected to the second photosensitive element and configured to convert an analog signal proportional to brightness of light impinging on the second photosensitive element to a digital signal; and a logic circuit electrically connected to the detector and the exposure measurement circuit and configured to enable the exposure measurement circuit in response to the trigger signal and to disable the exposure measurement circuit when the digital signal is read out from the exposure measurement circuit.

公开(公告)号：US20210235028A1

公开(公告)日：2021-07-29

申请号：US17051148

申请日：2019-04-30

Applicant: PROPHESEE

Inventor： Thomas FINATEU ,  Daniel MATOLIN ,  Christoph POSCH

IPC: H04N5/353 ,  H04N5/378 ,  H04N5/3745

Abstract: An image sensor includes a plurality of pixels, each pixel including a photosensitive element, and a photo-signal converter adapted to provide, on a first output, a current signal linearly proportional to the intensity of light impinging on the photosensitive element and to provide, on a second output, a voltage signal logarithmic with the intensity of light impinging on the photosensitive element. Each pixel further includes a detector adapted to generate a trigger signal when a signal of the detector proportional to the voltage signal of the second output of the photo-signal converter exceeds a threshold, and a light-to-time converter adapted to measure and encode, in the time domain, light intensity on the photosensitive element. A light-to-time conversion cycle may be initiated by the light-to-time converter in response to receipt of the trigger signal.

公开(公告)号：US20230125031A1

公开(公告)日：2023-04-20

申请号：US17906063

申请日：2021-03-10

Applicant: PROPHESEE

Inventor： Lagorce XAVIER ,  Daniel MATOLIN ,  Denis BOURKE ,  Thomas FINATEU

IPC: H04N25/47 ,  H04N25/76 ,  H04N25/771 ,  H04N25/707

Abstract: Embodiments of the present disclosure include an event-based image sensor and an event filtering method for use with an event-based image sensor. The event-based image sensor comprises a plurality of pixel circuits forming a pixel array, each pixel circuit comprising a photoreceptor circuit configured to generate a photoreceptor signal derived from a photocurrent generated by a light impinging on a light-sensitive element of the photoreceptor circuit, and a detector configured to detect a change in the photoreceptor signal and to generate an event in response to the detected change in the photoreceptor signa. The event-based image sensor further includes a processing chain and an event filter that is configured to receive the generated event and to accept the received event based on a plurality of conditions. The plurality of conditions include a condition that the received event is part of a previously unaccepted event trail, the event trail comprising a plurality of successive events having a same polarity and separated by time intervals each shorter than a time threshold.

公开(公告)号：US20230085570A1

公开(公告)日：2023-03-16

申请号：US17904212

申请日：2021-02-12

Applicant: PROPHESEE

Inventor： Daniel MATOLIN ,  Thomas FINATEU, III ,  Massimiliano GIULIONI ,  Christoph POSCH

IPC: H04N5/351 ,  H04N5/374 ,  H04N5/378

Abstract: A method for sampling data from pixels of an event vision sensor is disclosed. The method comprises receiving, with a selection circuit, an activation signal from an active pixel of the plurality of pixels of the line, generating, with the selection circuit, an acknowledge signal in response to receiving the activation signal, and sending the acknowledge signal to the plurality of pixels of the line, wherein each pixel of the line is configured to generate a request-reading signal when that pixel is active when receiving the acknowledge signal. The method also includes electrically coupling a control circuit to a pixel having a largest distance to the selection circuit among the plurality of pixels of the line, receiving, with the control circuit, the acknowledge signal from the selection circuit, generating, with the control circuit, a process-reading signal in response to receiving the acknowledge signal, and resetting the selection circuit and the plurality of pixels of the line after receiving the process-reading signal.

公开(公告)号：US20210127083A1

公开(公告)日：2021-04-29

申请号：US17255972

申请日：2019-06-27

Applicant: PROPHESEE SA

Inventor： Thomas FINATEU ,  Daniel MATOLIN ,  Christoph POSCH

IPC: H04N5/3745 ,  H04N5/345

Abstract: The present disclosure generally relates to image sensors and methods for image sensing. More specifically, and without limitation, this disclosure relates to systems and methods for providing super-pixels, and implementing and using image sensors with super-pixels. In one implementation, an image sensor includes a plurality of super-pixels. Each super-pixel may include a first photosensitive element; a detector electrically connected to the first photosensitive element and configured to generate a trigger signal when an analog signal proportional to brightness of light impinging on the first photosensitive element matches a condition; a second photosensitive element; an exposure measurement circuit electrically connected to the second photosensitive element and configured to convert an analog signal proportional to brightness of light impinging on the second photosensitive element to a digital signal; and a logic circuit electrically connected to the detector and the exposure measurement circuit and configured to enable the exposure measurement circuit in response to the trigger signal and to disable the exposure measurement circuit when the digital signal is read out from the exposure measurement circuit.