METHOD AND APPARATUS FOR AUTOMATIC EXPOSURE CONTROL USING LOCALIZED CAPACITIVE COUPLING IN A MATRIX-ADDRESSED IMAGING PANEL

摘要

A method and system for an automatic exposure control (AEC) arrangement for a matrix-addressed imaging panel (318) having an array of sensors (40) including use of localized regions of the imaging panel exhibiting capacitive coupling. In one embodiment, the matrix-addressed imaging panel includes one or more AEC electrode receptive field regions (750) that provide a signal representative of exposure specific, respective AEC electrode receptive field regions. Additionally, in another embodiment, the imaging array includes data line signal monitoring regions (770) in which capacitive coupling between electrodes in radiation sensors and data lines are read and processed to provide and AEC signal. In another embodiment, the imaging array includes both AEC electrode filed receptive regions (750) and data line signal monitoring regions (770) that are coupled to an AEC controller for control of the radiation source (312) for the imaging array.