DRIVING METHOD FOR SOLID-STATE IMAGE PICKUP ELEMENT

PURPOSE:To suppress blooming without the use of an NPN longitudinal transistor and an overflow drain, by suitably determining a voltage applied to a photo transmitting electrode provided on a photoconductive film. CONSTITUTION:One picture element is formed with an equivalent optical current source 1 of photconductive film, an equivalent capcitor 2 of photoconductive film, a diffusion capacitor at scanning integrated circuits and a switch element 4 using a field effect transistor. A voltage is applied to the photconductive film from a bias voltage source 12 via a photo-transmission electrode. This voltage is large than a difference between an open terminal voltage of the photoconductive film and a voltage forward-biasing the junction of the switch element 4 and is smaller than the sum between the open terminal voltage of the photoconductive film and the initial value of the potential of the film at different side of the photo-transmission electrode.