Radiation Detector Pixel Layout for Uniform Openings and Low Moiré
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radiation imaging apparatuses face issues with pixel arrangement near additional wiring lines, leading to image disturbances due to non-uniform opening portions, which affect image quality and moiré patterns.
Innovation Solution
A radiation detection sensor with a pixel matrix design where image capturing and detection pixels are arranged with uniform opening areas and adjusted centroid positions to minimize the impact of drive lines, ensuring consistent opening sizes and reducing moiré effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional wiring lines are provided for monitoring pixels, then radiation dose measurement capability is improved, but pixel arrangement flexibility deteriorates leading to image disturbances
Solution Approach 1:
The patent divides the pixel matrix into distinct regions: image capturing pixels arranged in regular rows and columns for radiographic imaging, and monitoring pixels arranged in separate rows (e.g., first monitoring pixel row and second monitoring pixel row) for radiation dose measurement. This segmentation allows each region to be optimized independently, preventing wiring lines from disrupting the regular arrangement of image capturing pixels.
Solution Approach 2:
The patent positions monitoring pixels in dedicated rows separated from the main image capturing pixel matrix, effectively moving the monitoring function to a different dimensional arrangement. This spatial separation allows drive lines to be routed without interfering with the uniform grid structure of image capturing pixels, eliminating moiré patterns while maintaining dose measurement capability.
2Device complexity
If monitoring pixels are integrated into the pixel matrix, then device complexity is reduced, but image quality deteriorates due to non-uniform opening portions
Solution Approach 1:
The patent applies different structural characteristics to different regions: image capturing pixels have uniform opening portions optimized for radiographic imaging, while monitoring pixels have opening portions configured for radiation dose detection. This local optimization ensures that each pixel type performs its specific function with high quality, preventing image disturbances while maintaining overall system effectiveness.
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 solution ensures uniform charge accumulation across pixels, preventing image disturbances and maintaining high image quality by minimizing differences in opening areas and centroid distances, thus enhancing the accuracy and clarity of radiographic images.
Implementation Method 1
each including a conversion element that converts radiation or light into a charge
Data Source
AI summary
A radiation detector includes a pixel matrix a plurality of first drive lines for driving, and a plurality of second drive lines, wherein a first pixel row of the pixel matrix is a pixel row that is neighbored by the first drive line and also by the second drive line, wherein an average area of an opening portion of the image capturing pixel included in the first pixel row and an opening portion of the detection pixel is a first average area, and wherein an error of an area of each opening portion of all image capturing pixels and all detection pixels included in the first pixel row falls within 1% of the first average area.