Patent ID: 8324582
Filing Date: 2012-12-04
Classification: H01L,H04N

Abstract:
1. A flat panel X-ray imager comprising: a plurality of discrete electrodes in contact with a dielectric layer which in turn is in contact with a photoconducting layer for converting X-ray energy to electron-hole pairs, a thin film transistor layer coupled between charge collection electrodes, disposed within said photoconducting layer, and a charge amplifier, storage capacitors coupled between said charge collection electrodes and a ground, said storage capacitors being coupled to said thin film transistor layer; a power supply coupled between said plurality of discrete electrodes and said ground, said power supply generating an electric field between said plurality of strip electrodes and said charge collection electrodes during an X-ray exposure and an image readout; a plurality of gutter discrete electrodes positioned at edges of said dielectric-photoconducting layers for collecting said trapped counter charges and returning them to said power supply; and wherein said plurality of discrete electrodes are driven at respective voltages, following said X-ray exposure and image readout, so as to drive out trapped counter charges between said dielectric layer and said photoconducting layer back to said power supply.