Patent ID: 7667172

Claim:
An image sensor, comprising: a photodetector which generates image signals; at least two storage units which store at least two image signals respectively; another storage unit which stores a previously stored reset signal; a comparator having a first electrode and a second electrode connectable to the at least two storage units; and a plurality of switch units including: a first switch unit constructed to connect the photodetector to the at least two storage units for permitting transfer of the at least two image signals generated in the photodetector, the first switch unit being constructed to switch the respective image signals to be stored in one of the at least two storage units; a second switch unit constructed to connect the at least two storage units to each other for equalizing the respective image signals stored in the at least two storage units; and another switch unit constructed to connect the another storage unit to the second electrode of the comparator to apply the previously stored reset signal to the second electrode.