Patent ID: 9661250
Date: 2017-05-23
CPC Classifications: H04N

Claim:
1. An image sensor comprising: an optoelectronic conversion circuit configured to store a first charge corresponding to a period of a high level signal and store a second charge corresponding to a period of a low level signal; and an output circuit comprising a first storage circuit and a second storage circuit respectively configured to store the first charge and the second charge transferred from the optoelectronic conversion circuit in a storage capacitor, and the output circuit being configured to compare the first charge in the storage capacitor of the first storage circuit with the second charge in the storage capacitor of the second storage circuit to output an analog image signal, wherein the first storage circuit comprises a comparator configured to compare a voltage of the storage capacitor thereof with a reference voltage to determine whether an auto exposure is performed, the high level signal and the low level signal are respectively configured to turn on and turn off a light source, and the optoelectronic conversion circuit is configured to, corresponding to the period of the low level signal, transfer the first charge to the storage capacitor of the first storage circuit, store the second charge and transfer the second charge to the storage capacitor of the second storage circuit, successively.