X-ray Detection Panel Dual Bias Lines
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Solution Overview
Problem
Current X-ray detection methods using separate films or CCD/CMOS detectors are inefficient, as they require multiple exposures and image magnification, leading to increased costs and potential errors due to small detector sizes and the need for separate film usage.
Innovation Solution
An X-ray detection panel with a substrate, gate lines, data lines, bias lines, a detection unit region comprising a TFT and PIN diode, and a scintillator that converts X-rays to visible light, featuring dual bias lines for robust bias voltage application, reducing disconnection occurrences and enabling error-free detection without separate films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate films are used for X-ray detection, then detection can be performed, but cost increases and multiple exposures are required
Solution Approach 1:
The patent combines multiple detection functions into a single digital detector panel, eliminating the need for separate films for each exposure. The detector integrates scintillator, photodiode array, and readout circuitry to perform multiple detections sequentially without requiring physical film changes, thus reducing exposure time and operational complexity.
Solution Approach 2:
The digital detector panel serves multiple functions: it detects X-rays, converts them to visible light, captures the light signals with photodiodes, and reads out the data electronically. This multi-functional integration replaces the single-purpose film system, allowing repeated detections without additional cost or time for film handling.
2Reliability
If CCD or CMOS detectors are used, then detection is possible, but the small detector size requires image magnification
Solution Approach 1:
The detector panel is segmented into multiple independent detection elements (photodiodes) arranged in a large array. Each photodiode corresponds to a specific spatial position, allowing the detector to maintain large physical dimensions while providing high-resolution detection without requiring image magnification. The segmented structure enables direct capture of full-field images.
Solution Approach 2:
The patent transitions from small one-dimensional or two-dimensional detector arrays to a large two-dimensional array of photodiodes. This dimensional expansion allows the detector to cover a large detection area directly, eliminating the need for magnification systems while maintaining detection precision through the increased number of spatial sampling points.
3Device complexity
If single bias line is used, then structure is simple, but disconnection occurs and detection errors increase
Solution Approach 1:
The patent applies different properties to different parts of the bias line structure. The first bias line uses transparent conductive material optimized for optical transparency, while the second bias line uses low resistance material optimized for electrical conductivity. This local differentiation allows each bias line to perform its specific function optimally while providing redundancy for reliable operation.
Solution Approach 2:
The patent implements a redundant bias line structure where a second bias line is prepared in advance as a backup. If the first bias line disconnects or fails, the second bias line can take over to maintain detection functionality. This prior cushioning approach prevents detection errors by having a pre-established backup system.
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
The X-ray detection panel allows for efficient detection of X-rays without separate films, minimizing errors and costs by applying bias voltage through dual bias lines, ensuring continuous detection even if one line disconnects, and enabling faster processing for moving objects.
Implementation Method 1
a scintillator adapted to convert X-rays to light of a visible wavelength
Implementation Method 2
The photosensor may be a PIN diode
Data Source
AI summary
An X-ray detector includes a plurality of bias connection lines that connect both ends, respectively, of a bias line for applying a bias voltage to a PIN diode. The bias line includes first and second bias lines.