CHARGE INJECTION COMPENSATION FOR DIGITAL RADIOGRAPHIC DETECTORS

摘要

Embodiments of DR detector methods and/or apparatus for charge compensation can provide charge injection and/or at least one charge injection circuit that can temporally cancel charge injection to readout circuits resulting from positive (and/or negative) transitions of gate lines for pixel signal readout. In certain exemplary embodiments, DR detector imaging array methods and/or apparatus can provide variable charge injection levels (e.g., voltage or capacitance), variable Tau (e.g., resistance or capacitance), and/or multi-charge injection with staggered timing (e.g., using voltage and/or capacitance steps). In certain exemplary embodiments, DR detector imaging array methods and/or apparatus can provide charge injection compensation on ROIC on mask block basis. In exemplary embodiments, DR detector imaging array methods and/or apparatus can provide voltage reset off-set in readout circuits (e.g., ROICs).

主权项

1. A digital radiographic area detector comprising:
a housing configured to include an upper surface, a lower surface, and side surfaces to connect the upper surface and the lower surface; an imaging device mounted inside the housing, the imaging device comprising a plurality of pixels, each pixel comprising at least one electrically chargeable photosensor and at least one thin-film transistor; a bias control circuit to provide a bias voltage to the photosensors for a portion of the imaging array; an address control circuit to control gate lines, where each of the gate lines is configured to extend in a first direction and is coupled to a plurality of pixels in the portion of the imaging array; a signal sensing circuit connected to data lines, where each of the data lines is configured to extend in a second direction and is coupled to at least two pixels in the portion of the imaging array; and at least one charge compensation circuit coupled to the data lines, where the charge compensation circuit is configured to provide a compensation charge injection including temporal cancelation of gate line charge injection.