Image Sensor

Abstract

The invention discloses an image sensor. The image sensor comprises a pixel array, a time sequence control unit and a control unit; the time sequence control unit is used for generating a light source pulse sequence, a gating pulse sequence and frame exposure time according to the control of the control unit; the control unit is used for controlling a light source connected with the image sensor to carry out stroboflash in the frame exposure time according to the light source pulse sequence; the control unit is also used for determining delay between gating pulses and corresponding light source pulses and the number of gating pulses corresponding to each delay so as to determine the gating pulse sequence and the frame exposure time; the control unit is also used for controlling the image sensor to carry out a plurality of times of electron exposure in the frame exposure time according to the gating pulse sequence; and the pixel array is used for outputting a frame image after the frame exposure time, wherein the frame image is formed by adding sub images generated by the plurality of times of electron exposure. The image sensor provided by the embodiments of the invention has a wide dynamic range and is clear in imaging.

Description

technical field [0001] The invention relates to photography technology, in particular to an image sensor. Background technique [0002] The exposure methods of the image sensor include global exposure and progressive exposure. Global exposure means that all pixel units of the pixel array of the image sensor are exposed at the same time, perform photoelectric conversion and output pixel voltage values ​​in the form of integrals. When the progressive exposure starts, not all pixel units are exposed at the same time, but are exposed sequentially, that is, after the pixel units of the first row are exposed, the pixel units of the second row are exposed, and so on, until the pixels of the pixel array are exposed. All pixel units are exposed. [0003] When global exposure is used, if the target scene has too much change in light and dark or there is a brighter noisy light source, the image sensor needs to use a shorter exposure time to prevent the image sensor from overexposure,...

AI Technical Summary

Problems solved by technology

[0003] When global exposure is used, if the target scene has too much change in light and dark or there is a brighter noisy light source, the image sensor needs to use a shorter exposure time to prevent the image sensor from overexposure, but this will result in insufficient brightness for darker subjects But can't see clearly, the dynamic range of the image sensor is narrow

When using progressive exposure, since the exposure is not simultaneous, the image will appear smear when there is relative movement between the image sensor and the subject during exposure

Images