Offset Pixel Array for High Accuracy Displacement Detection
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Solution Overview
Problem
Existing pixel arrays face a tradeoff between resolution and effective size, where increasing resolution reduces the size of the detection area, limiting the speed and feature size of objects that can be detected, and increasing array size increases complexity and power consumption.
Innovation Solution
A pixel array design with offset rows, where each row is offset by less than 50% of a pixel width, allowing for higher resolution without reducing the array size, enabling detection of object displacement, speed, or acceleration with improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixel size is decreased to increase resolution, then detection accuracy is improved, but total array coverage and detection speed are reduced
Solution Approach 1:
The pixel array is segmented into multiple rows with different offset patterns. Each row is divided into pixel groups that are offset relative to adjacent rows, creating a finer effective sampling grid without reducing individual pixel size. This segmentation allows the system to achieve high-resolution detection while maintaining large array coverage.
2Area of stationary object
If array size is increased to maintain resolution, then detection coverage is improved, but device complexity and power consumption increase
Solution Approach 1:
The pixel rows are arranged with asymmetric offset patterns rather than a simple rectangular grid. Each row is offset by a different amount (e.g., 1/4, 1/2, 3/4 pixel width) relative to the previous row, creating an asymmetric staggered pattern. This asymmetric arrangement increases effective resolution without requiring a proportionally larger array, thereby controlling device complexity.
3Measurement precision
If pixel size is decreased to increase resolution, then detection accuracy is improved, but power consumption increases
Solution Approach 1:
The system changes the spatial arrangement parameter of the pixel array by introducing offset patterns between rows, rather than changing the pixel size parameter. This parameter change allows the system to achieve higher effective resolution through the offset pattern while maintaining larger pixel sizes, thereby reducing power consumption compared to systems that would require smaller pixels to achieve the same resolution.
Data Source
AI summary
A pixel array system for high accuracy detection of displacement, speed or acceleration includes: an array including a plurality of pixels, each pixel touching at least one other pixel in a same row and touching at least one other pixel in a different row. At least one row is offset with respect to a preceding row of the array by less than 50% of a pixel width. The array receives an input from an object passing over at least the offset row and the preceding row, and detects displacement, speed or acceleration of the object when said object passes over the array, in order to generate an output representing at least one of the detected displacement, speed or acceleration of the object.