Patent ID: 6232606
Filing Date: 2001-05-15
Classification: H01L

Abstract:
A pixel for a radiation imaging flat panel detector comprising:a radiation transducer to be exposed to incident radiation;a pixel electrode on one side of said radiation transducer to accumulate a positive charge generally proportional to the exposure of said radiation transducer to radiation;a second electrode separated from said pixel electrode by a dielectric and connected to a source line, said pixel and second electrodes constituting a storage capacitor, said second electrode developing a negative charge approximately equal to the magnitude of the positive charge accumulated by said pixel electrode; anda semiconductor switch coupled between said pixel electrode and a terminal connectable to ground, said semiconductor switch being responsive to a gating signal to connect electrically said pixel electrode to said terminal when said terminal is connected to ground to discharge said pixel electrode thereon, said second electrode releasing said negative charge on said source line when said pixel electrode discharges to allow the charge to be detected.