Radiation Imaging Sensor Sampling Overlap for Parasitic Capacitance
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Solution Overview
Problem
In radiation imaging apparatuses, the sampling units often experience uneven sampling characteristics, leading to degraded signal sampling accuracy and image quality due to parasitic capacitance effects during sampling operations.
Innovation Solution
The apparatus employs a driving method where the second sampling driving operation is started before the completion of the first sampling driving operation and completed after it, ensuring that both sampling units maintain consistent sampling characteristics by overlapping their active periods, thereby mitigating the impact of parasitic capacitance and improving sampling accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If sampling units are used to sample signals from detection elements, then signal sampling capability is improved, but sampling accuracy deteriorates due to uneven sampling characteristics and parasitic capacitance effects
Solution Approach 1:
The patent applies periodic action by performing multiple sampling operations at different time points (first sampling at time t1, second sampling at time t2) to capture signal variations. This periodic sampling approach allows the system to average out parasitic capacitance effects and maintain consistent sampling characteristics across different sensor units, thereby improving sampling accuracy while preserving automated signal sampling capability
Solution Approach 2:
The patent changes the timing parameter of sampling operations by introducing a specific time interval between the first sampling operation (at time t1) and the second sampling operation (at time t2). This parameter change allows the sampling circuit to capture different signal states and use arithmetic processing to eliminate parasitic capacitance effects, resolving the contradiction between automated sampling and sampling accuracy
2Quantity of substance
If multiple sampling operations are performed sequentially, then sampling completeness is improved, but sampling consistency deteriorates due to changes in sampling characteristics between operations
Solution Approach 1:
The patent implements feedback by performing a second sampling operation after the first sampling, using the results from both operations to calculate a corrected signal value through arithmetic processing. This feedback mechanism allows the system to detect and compensate for changes in sampling characteristics, maintaining sampling consistency across multiple operations while ensuring complete signal capture
Solution Approach 2:
The patent applies preliminary action by performing the first sampling operation at time t1 before the second sampling at time t2, establishing a baseline measurement that enables subsequent correction. This preliminary sampling action allows the system to prepare correction data in advance, ensuring both complete signal capture and consistent sampling characteristics across operations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the sampling accuracy of sensor signals by averaging the sampling characteristics of multiple operations, resulting in improved radiation image quality by reducing unexpected changes in the sampling characteristics of the first sampling unit.
Implementation Method 1
each of the plurality of sensor units includes a detection element that detects radiation
Data Source
AI summary
A radiation imaging apparatus, comprising a sensor array in which a plurality of sensor units are arranged and a driving unit for driving the sensor array, wherein each sensor unit includes u detection element for detecting radiation and a sampling unit configured to be able to sample a signal from the detection element, the sampling unit is connected to a signal line configured to propagate a signal from the detection element, the driving unit uses the sampling unit to perform a first sampling driving operation and a second sampling driving operation to sample the signal propagating through the signal line, and the driving unit starts the second sampling driving operation before the completion of the first sampling driving operation and completes the second sampling driving operation after the completion of the first sampling driving operation.