Patent ID: 6995879

Claim:
An image sensing apparatus characterized by comprising: a plurality of photodetectors; resettable integrators which are arranged for said respective photodetectors, integrate charges output from said photodetectors, and output voltage signals corresponding to integrated charge amounts; output switches arranged on output sides of said respective integrators to connect said integrators to an external output line; a first switch series-inserted between each photodetector and each integrator; and a controller for closing said first switch when an absolute value of an output voltage from said integrator is lower than a predetermined reference voltage, and opening said first switch when the absolute value of the output voltage from said integrator is not lower than the predetermined reference voltage characterized in that said apparatus further comprises a second switch for connecting each photodetector and an overflow drain for removing charges output from said photodetector, and said controller opens said second switch when the absolute value of the output voltage from said integrator is lower than the predetermined reference voltage, and closes said second switch when the absolute value of the output voltage from said integrator is not lower than the predetermined reference voltage.