Patent ID: 7012260

Claim:
A radiation image pick-up device having: a radiation detecting circuit section in which a plurality of pixels for detecting incident radiations are two-dimensionally arranged over a substrate, and a drive circuit section for driving said radiation detecting circuit section, wherein: said pixels comprise: MIS-type conversion elements for converting the incident radiations into electric signals, source follower-type first field effect transistors for reading out electric signals resulting from the conversion by said conversion elements, second field effect transistors provided to read out the electric signals of said conversion elements selected row by row by said drive circuit section from said first field effect transistors, and third field effect transistors provided to reset or refresh row by row said conversion elements read out by said first field effect transistors, and wherein either (1) one type electrodes of said conversion elements are connected via said third field effect transistor to a first switch for switching between a reset bias for performing said resetting and a first refresh bias for performing said refreshing, or the (2) other type electrodes of said conversion elements are connected via a bias wiring common to individual conversion elements to a second switch for switching between a sensor bias for providing the converting operations by said conversion elements and a second refresh bias for refreshing the electric signals of said conversion elements.