Sequential Row Exposure Termination for Motion Blur Reduction
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Solution Overview
Problem
Indicia reading apparatuses face challenges in achieving high-resolution image capture with low motion blur, particularly in applications requiring increased motion tolerance, due to limitations in exposure control and illumination management.
Innovation Solution
The apparatus employs an image sensor array with a frame exposure period where subsequent rows have common initiation times and sequential termination times, coordinated with an illumination period that overlaps and terminates before the exposure termination time, utilizing a low-cost high-resolution image sensor integrated circuit and adaptive illumination patterns to reduce motion artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional image sensor with simultaneous exposure is used, then the device complexity is low, but motion blur increases and image quality deteriorates
Solution Approach 1:
The patent divides the image sensor array into multiple rows, each capable of independent exposure timing control. This segmentation allows different rows to have different exposure termination times, enabling sequential row exposure termination that reduces motion blur while maintaining manageable device complexity through structured control
2Illumination intensity
If the illumination period is extended to cover the entire frame exposure period, then illumination coverage is improved, but motion artifacts increase
Solution Approach 1:
The patent implements preliminary action by terminating the illumination period before the end of the frame exposure period. This ensures that illumination is provided during the critical exposure window while avoiding illumination during later times when object motion would create artifacts, thus reducing motion artifacts while maintaining adequate illumination coverage
3Manufacturing precision
If sequential row exposure termination is implemented, then motion blur is reduced and image quality improves, but the illumination control complexity increases
Solution Approach 1:
The patent applies dynamics by making the exposure termination time variable across different rows rather than static and simultaneous. Each row can have its exposure terminated at an optimized time based on its position and the motion characteristics, reducing motion blur while the control system manages complexity through dynamic, adaptive timing control
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 configuration results in improved image quality with reduced motion blur, enabling higher motion tolerance and efficient data capture in various applications, including point of sale, shipping, and patient care scenarios.
Implementation Method 1
an image sensor array including a plurality of pixels arranged in a plurality of rows and columns of pixels
Implementation Method 2
a light source bank of an illumination pattern assembly for projecting an illumination pattern
Data Source
AI summary
There is set forth herein an indicia reading apparatus having an image sensor array including a plurality of pixels arranged in a plurality of rows and columns of pixels. The image sensor array can include a frame exposure period in which a certain subsequent and further subsequent row exposure periods have common exposure initiation times and sequential exposure termination times. An indicia reading apparatus can be controlled so that a light source bank of an illumination pattern assembly for projecting an illumination pattern is energized during an illumination period that overlaps a frame exposure period. The apparatus can be further controlled so that an illumination period terminates at or prior to an exposure termination time of the certain row.