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Image sensor and operating method thereof, motion sensor including same

A technology of image sensor and operation method, applied in the field of image sensor, capable of solving problems such as image distortion

Active Publication Date: 2018-06-22
PIXART IMAGING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the plurality of sensing pixels in each column are activated sequentially rather than simultaneously (that is, the exposure time of the plurality of sensing pixels in each column is different), when acquiring images of fast-moving objects, a rolling shutter is used. The acquired image may have the problem of distortion (distortion)

Method used

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  • Image sensor and operating method thereof, motion sensor including same
  • Image sensor and operating method thereof, motion sensor including same
  • Image sensor and operating method thereof, motion sensor including same

Examples

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Embodiment Construction

[0029] figure 2 It is a circuit diagram of the image sensor 1 of some embodiments of the present invention. The image sensor 1 is used to sense light energy and convert it into an electrical signal. The image sensor 1 includes at least one photoelectric conversion circuit 10 and an output circuit 20 , wherein the output terminal of the photoelectric conversion circuit 10 and the input terminal of the output circuit 20 are connected by a bit line 70 . The image sensor 1 has a plurality of sensing pixels arranged in an array and each includes a photoelectric conversion circuit 10 , and the output terminals of the plurality of photoelectric conversion circuits 10 in each row can be electrically connected to the input terminal of the output circuit 20 through a bit line 70 . For example, an image sensor including M×N sensing pixels has M×N photoelectric conversion circuits and M or N output circuits and bit lines. To simplify the diagram, figure 2Only two photoelectric conversi...

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Abstract

The invention provides an operating method of an image sensor including: storing a first charge from an optoelectronic element to a pixel buffer circuit within a first exposure period; transferring the first charge from the pixel buffer circuit to a first storage circuit within a second exposure period; storing a second charge from the optoelectronic element to the pixel buffer circuit within the second exposure period after the first charge is transferred; transferring the second charge from the pixel buffer circuit to a second storage circuit; and comparing charges stored in the first storage circuit and in the second storage circuit to output an analog image signal.

Description

technical field [0001] The present invention relates to an image sensor, in particular, to an image sensor using analog difference to eliminate ambient light interference, an operating method thereof, and a motion sensor including the image sensor. Background technique [0002] A known image sensor usually has a plurality of sensing pixels arranged in an array, wherein one operation method of the image sensor can use a rolling shutter (Rolling Shutter), for example, a control signal is used to sequentially activate the plurality of sensing pixels in each column of the image sensor. Pixels are sensed to acquire an image. Since the plurality of sensing pixels in each column are activated sequentially rather than simultaneously (that is, the exposure time of the plurality of sensing pixels in each column is different), when acquiring images of fast-moving objects, a rolling shutter is used. The acquired images may suffer from distortion. [0003] Another operating method of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235H04N5/369
Inventor 许恩峰
Owner PIXART IMAGING INC
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