Patent ID: 8581198

Claim:
An apparatus for detecting radiation, the apparatus comprising: an upper electrode layer transmitting radiation; a first photoconductive layer becoming photoconductive upon exposure to the radiation and thus generating charges therein; a charge trapping layer trapping therein the charges generated in the first photoconductive layer and serving as a floating electrode; a second photoconductive layer becoming photoconductive upon exposure to rear light for reading out a radiation image; a lower transparent electrode layer charged with the charges trapped in the charge trapping layer; and a rear light emission unit applying the rear light to the second photoconductive layer via the lower transparent electrode layer in units of pixels, wherein the rear light emission unit comprises two substrates facing each other, a plurality of barrier ribs defining a cell structure between the two substrates, a gas layer disposed in an inner chamber inside the cell structure and emitting plasma light, and a plasma display panel (PDP) providing the plasma light to the lower transparent electrode layer as the rear light.