Image sensor, automatic exposure method thereof and electronic equipment

Abstract

The embodiment of the invention provides an image sensor, an automatic exposure method thereof and electronic equipment, the image sensor comprises a pixel array and a control circuit, the pixel arraycomprises at least one first pixel and at least one second pixel, and in an application scene with the same illumination intensity, the first light incoming amount sensed by the first pixel is lowerthan the second light incoming amount sensed by the second pixel; and a control circuit is used for generating a first exposure control signal according to the first light incoming amount and adjusting the first exposure time of the at least one first pixel according to the first exposure control signal; generating a second exposure control signal according to the second light incoming amount, andadjusting second exposure time of the at least one second pixel according to the second exposure control signal; wherein the first exposure time is different from the second exposure time.

Description

Technical field [0001] Example embodiments relate to image processing, and in particular relates to an image sensor and an automatic exposure method, the electronic apparatus of the present application. Background technique [0002] Since the effect of the image sensor photosensitive where its application is closely related to the scene illumination level, in recent years, the image sensor of the electronic device in order to meet the needs of the imaging application scenario different light intensities, by providing an automatic exposure strategies to achieve better image results. See Figure 1A , Normal image sensor pixel array comprising: a color pixel of red pixels, green pixels and blue pixels. See Figure 1B , Which is the exposure strategy determines an exposure control signal based on the color pixel sensing the amount of light sensed, i.e., if the color sensing pixel to the pixel gray value has not reached the target value, the exposure time of the exposure control signal ...

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Problems solved by technology

[0003] see Figure 2a as well as Figure 2b , is suitable for image sensors under low light intensity. Since the pixel array includes white pixels, the amount of incoming light sensed by the white pixels is greater than that of the color pixels, and the same exposure control signal is used to control the exposure time for the white pixels and the color pixels. Overexposure of white pixels, affecting the image quality obtained by the image sensor

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