Patent ID: 7830439

Claim:
An image sensing apparatus comprising: at least one pixel comprising a photoelectric converter, a floating diffusion part which briefly accumulates a charge generated in the photoelectric converter, a transfer switch which transfers the charge from the photoelectric converter to the floating diffusion part and a reset unit which resets the floating diffusion part; a signal read unit which reads out a signal from the floating diffusion part; a detector which detects an amount of a charge which leaks from the photoelectric converter into the floating diffusion part by comparing a preset reference potential with the potential of the floating diffusion part during an exposure period of the photoelectric converter in a state that the transfer switch is turned off; and a controller which turns on the transfer switch and the reset unit so as to reset the photoelectric converter when the potential of the floating diffusion part during the exposure period of the photoelectric converter is lower than the preset reference potential, and which turns on the reset unit without turning on the transfer switch so as to reset the floating diffusion part without resetting the photoelectric converter otherwise.