X-ray sensing module dark pixel positioning accuracy
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Solution Overview
Problem
Existing X-ray sensing modules face challenges in improving the accuracy or precision of positioning, particularly in applications requiring high-resolution imaging without destructive detection.
Innovation Solution
The X-ray sensing module incorporates a substrate with a sensing area containing normal pixels for light signal detection and at least two dark pixels positioned strategically within the sensing area. The dark pixels are designed to be located at specific distances from the edges of the sensing area, allowing them to serve as positioning points for improving image alignment and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dark pixels are added to the sensing area for positioning, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
Dark pixels serve as intermediary positioning markers that facilitate image alignment without interfering with the primary imaging function. These dedicated positioning elements mediate between the imaging system and the positioning requirement, enabling accurate image overlap through feature detection and geometric calculation.
Solution Approach 2:
The sensing area is segmented into functional zones: normal pixels for imaging and dark pixels for positioning. This segmentation allows each pixel type to perform its specialized function independently, with dark pixels strategically positioned at known locations to provide positioning references without compromising the imaging quality of normal pixels.
2Measurement precision
If dark pixels are positioned close to edges for better positioning reference, then positioning precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The positions of dark pixels are predetermined and pre-calculated during the design phase. Their locations are strategically selected to maximize positioning accuracy while accounting for manufacturing tolerances. This preliminary planning allows the system to achieve high positioning precision even with moderate manufacturing variations.
Solution Approach 2:
The system employs feedback mechanisms where the actual positions of dark pixels are detected and used to calculate correction factors. These feedback-derived corrections compensate for manufacturing deviations, allowing the system to achieve high positioning precision despite variations in the actual placement of dark pixels during manufacturing.
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
By utilizing dark pixels as positioning points, the X-ray sensing module enhances the accuracy and precision of image positioning, enabling better overlap and alignment of multiple images, thus improving overall imaging quality.
Implementation Method 1
The photosensitive element is electrically connected to the transistor and is configured to convert a light signal into an electrical signal
Data Source
AI summary
An X-ray sensing module includes a substrate, multiple normal pixels, and at least two dark pixels. The substrate includes a sensing area. The sensing area has four corners in a top view direction. The normal pixels are disposed in the sensing area and are configured to sense light signals. The at least two dark pixels are respectively disposed at different positions in the sensing area. A distance between the at least two dark pixels and an edge of the sensing area is ¼ to 1/350 of a length of the edge.