Method of Refresh Operation for Flat Panel Radiation Imager
AssigneesKabushiki Kaisha Toshiba, Toshiba Electron Tubes & Devices Co., Ltd.
InventorHiroshi Onihashi
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Abstract
To provide a method of refresh operation for a flat panel radiation imager that makes it possible to carry out a refresh operation in such a way that electric charge that is accumulated in pixels by photoelectric conversion is efficiently released with low power consumption and during a short period of time. Control signals of the refresh operation are turned into a plurality of successive pulses at regular intervals; and timing is adjusted in a way that adjacent switching elements disposed on the same signal line are not turned ON at the same timing.
Claims5
A method of refresh operation for a flat panel radiation imager including:
- a substrate, a plurality of pixels containing photoelectric conversion elements and switching elements two-dimensionally arranged, gate lines connected to a gate control circuit and switching the switching elements by control signals from the gate control circuit, and signal lines connected to a signal detection circuit and reading pixel signals from the photoelectric conversion elements on the substrate, wherein the switching elements are turned ON to perform a process of reading electric charge accumulated in the pixels and image processing and after the processing a refresh operation is carried out to release residual electric charge in the pixels by turning the switching elements ON, comprising:
- applying the control signals with a plurality of successive pulses at regular intervals to each of the gate lines of the refresh operation;
- and
- adjusting timing of the control signals in a way that the adjacent switching elements on the same signal line are not turned ON at the same timing.
Dependencies are inferred from the claim text.