| 摘要 |
A photo-electric converter comprises a plurality of sensor columns; a reference voltage control circuit for correcting a difference between outputs of the sensor columns; a control block including a plurality of comparators for discriminating the output voltages of photo-sensing elements of the sensor columns and an accumulation time control circuit connected to the comparators, wherein switching element is adapted to be driven by the output of the control block to make the output accumulation time to be correlated to the output voltages of the photosensing elements. The reference voltage control circuit controls a comparison reference voltage applied to the comparators of the control block to cause the sensor columns to produce outputs of the same level. <IMAGE> |
