The light will be further converged and refracted by the microlenses of the CIS, and then be color filtered by the color filter array (CFA). The filtered photons enter the photodiode for light/electrical conversion.

When a positive voltage is applied to the electrodes of the photosensitive element, csi camera module  , a positive potential will be generated on the surface of the silicon substrate, and the positive potential will form a potential well. The greater the positive voltage applied to the electrode, the deeper the potential well and the greater the attraction for electrons.

The charge generated by the photons is so small that an amplifier is needed to amplify the signal. After simple processing by the analog processor, digital-to-analog conversion, that is, A/D conversion, is performed to convert the analog signal into a digital signal.

At this point, the CIS has basically completed the processing of the light source. It can be understood that CIS processes light into digital signals that can be recognized by machines. Of course, due to the advancement of manufacturing process and technology, the integration degree of CIS is also getting higher and higher, not only to simply deal with the light source, some image sensors have a high degree of SOC integration, which can directly correct the image.

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