X-ray Imaging Gate Driver Dynamic Turn-on Signal Adjustment
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Solution Overview
Problem
X-ray imaging apparatuses face signal loss and level differences in image acquisition due to leakage and current traps during the readout process, leading to suboptimal image quality.
Innovation Solution
The implementation of a control method that differentiates turn-on signal durations based on detected X-ray signals, applying longer durations for initial regions and shorter durations for subsequent regions, and employing binning scanning to synchronize turn-on times for improved image acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uniform turn-on signal duration is applied to all gate lines during readout, then the readout process is simple and fast, but signal loss and level differences occur due to leakage and current traps
Solution Approach 1:
The patent applies dynamic turn-on signal duration adjustment where the gate driver changes the turn-on time period of gate signals based on detected X-ray signals. When X-rays are detected in a specific region, the turn-on duration for subsequent gate lines is reduced, creating a dynamic adaptation to the imaging conditions that prevents signal overflow and level differences while maintaining readout efficiency
Solution Approach 2:
The patent changes the temporal parameter (turn-on duration) of the gate signal dynamically during the readout process. By adjusting the gate signal width based on X-ray detection results from previous gate lines, the system optimizes signal capture for each region, reducing both signal loss and overflow effects without requiring uniform timing across all gate lines
2Measurement precision
If slow scanning is performed on all regions to detect X-rays accurately, then signal detection precision is improved, but image acquisition time increases and level differences occur
Solution Approach 1:
The patent segments the image acquisition process into two distinct phases: a slow scanning phase for initial X-ray detection on all gate lines to identify regions with X-ray signals, and a fast scanning phase for acquiring actual image signals only on gate lines where no X-rays were detected. This segmentation allows the system to spend time only where necessary for accurate detection
Solution Approach 2:
The patent applies partial action by performing slow scanning only on specific gate lines where X-ray signals are detected, rather than uniformly across all gate lines. The fast scanning is applied partially to regions where no X-rays are present, optimizing the balance between detection precision and acquisition time by applying different scanning speeds only where needed
3Productivity
If fast scanning is performed on all regions to reduce acquisition time, then productivity is improved, but signal loss occurs due to leakage and current traps
Solution Approach 1:
The patent dynamically adjusts scanning speed based on real-time X-ray detection results. The gate driver modifies turn-on signal durations during the readout process, extending the turn-on period for gate lines where X-rays are detected to prevent signal loss, while maintaining fast scanning for other regions, thus adapting the scanning speed to the actual imaging conditions
Solution Approach 2:
The patent changes the temporal parameter of the gate signal (turn-on duration) dynamically during fast scanning operations. By extending the gate signal width for specific gate lines where X-ray signals are present, the system compensates for signal loss due to leakage and current traps while maintaining overall fast acquisition speed for the entire image
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 reduces signal loss and level differences in X-ray images by optimizing scanning strategies, enhancing image quality without the need for post-processing corrections.
Implementation Method 1
an X-ray detection region including a plurality of gate lines... if an X-ray signal is detected from a gate line
Data Source
AI summary
Disclosed herein is an X-ray imaging apparatus including: a gate driver configured to apply a turn-on signal to a plurality of gate lines; and a readout circuit configured to read out a signal from the plurality of gate lines, wherein if an X-ray signal is detected from a gate line of the plurality of gate lines, the gate driver changes a turn-on time period of the turn-on signal.