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Image sensor

An image sensor and pixel technology, applied in the field of image sensors, can solve problems such as reducing power consumption and restricting applications, and achieve the effect of reducing power consumption

Active Publication Date: 2020-08-07
OMNIVISION SENSOR SOLUTION (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, the pixel unit of a general dynamic vision sensor is unconditionally turned on and working all the time, so it cannot reduce its own power consumption according to different applications, which limits its application in low-power systems

Method used

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Embodiment Construction

[0030] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0031] figure 1 A schematic diagram of an image sensor 100 according to some embodiments of the invention is shown. The image sensor 100 is capable of detecting motion discontinuities in the space-time domain. According to an implementation manner, the image sensor 100 is coupled with an external image processor, and sends the output event data stream to the external image processor for further calculation and application. Embodi...

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Abstract

The invention discloses an image sensor. The image sensor comprises a pixel acquisition circuit array, a global control unit, a photocurrent detection unit and a read-out unit, wherein the pixel acquisition circuit array is composed of a plurality of pixel acquisition circuits, and the pixel acquisition circuits are suitable for monitoring light intensity changes in a view field and entering a trigger state when the light intensity changes meet a certain condition; the global control unit is coupled with the pixel acquisition circuit array, and is suitable for resetting the pixel acquisition circuit array when the image sensor is powered on, and releasing the resetting when the pixel acquisition circuit array keeps a stable initial state, so that the pixel acquisition circuit array startsto work; the photocurrent detection unit is coupled with the pixel acquisition circuit array and is suitable for detecting whether light intensity change exists in the pixel acquisition circuit arrayor not and controlling the working state of at least one pixel acquisition circuit according to the detected light intensity change; and the read-out unit is suitable for responding to the pixel acquisition circuit in the trigger state and outputting corresponding address information.

Description

technical field [0001] The invention relates to the technical field of image acquisition, in particular to an image sensor. Background technique [0002] Among the many application fields of image sensors, the detection of moving objects is one of the important aspects. In this application field, compared with traditional image sensors (such as active pixel sensors), dynamic vision image sensors (hereinafter referred to as dynamic vision sensors) have gradually attracted people's attention due to their unique advantages. [0003] Based on the pixel unit (or pixel acquisition circuit) designed based on the bionic principle, the dynamic vision sensor can continuously respond to the light intensity changes in the field of view in real time without any exposure time, which makes it easier to detect high-speed motion object. In addition, because the dynamic vision sensor only responds to and outputs the position information of the pixel unit corresponding to the area where the ...

Claims

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Application Information

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IPC IPC(8): H04N5/369H04N5/351
CPCH04N25/50H04N25/70H04N25/47H04N25/707H04N25/709H04N23/71H04N25/74H04N25/75
Inventor 陈守顺郭梦晗
Owner OMNIVISION SENSOR SOLUTION (SHANGHAI) CO LTD