Symmetric Test Pattern Imaging for Printing Density Adjustment
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Solution Overview
Problem
Existing test patterns for adjusting printing characteristics in devices like inkjet printers face issues with peripheral dimming when captured by thin information terminals like smartphones, requiring multiple captures and significant memory due to limited accommodation space, leading to inefficiencies in density adjustment.
Innovation Solution
A test pattern with a density pattern arranged symmetrically within the imaging target region, aligned with the center or a straight line, and an imaging control program that ensures the center of the target region is within the imaging section's view, reducing peripheral dimming effects by capturing the entire pattern once.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If zoom is performed to a level at which peripheral dimming does not become a problem, then peripheral dimming is reduced, but the entire test pattern cannot be captured at once and multiple captures are required
Solution Approach 1:
The density pattern is arranged asymmetrically within the imaging target region, with specific patterns placed in regions that compensate for peripheral dimming effects. This asymmetric arrangement allows the pattern to be captured once without requiring multiple captures, as the asymmetric design accounts for the non-uniform light distribution across the lens.
Solution Approach 2:
Different regions of the test pattern are designed with different local characteristics. The density pattern includes specific patterns in regions that are more susceptible to peripheral dimming, allowing each region to be optimized for its specific lighting conditions while being captured in a single image.
2Object-affected harmful factors
If zoom is performed to a level at which peripheral dimming does not become a problem, then peripheral dimming is reduced, but a large amount of memory is required to store the captured image
Solution Approach 1:
Only the necessary portions of the test pattern are captured within the imaging target region, extracting only the essential density information needed for adjustment. This selective capture approach reduces the amount of data that needs to be stored while still providing sufficient information for printing density adjustment.
3Loss of time
If the imaging target region is captured once, then time and memory are saved, but peripheral dimming effects cannot be avoided
Solution Approach 1:
The peripheral dimming effect is converted from a harmful factor into a beneficial design consideration. The density pattern is specifically arranged to account for the dimming effect, transforming the limitation into a feature that allows single-capture adjustment while maintaining accuracy.
Data Source
AI summary
A test pattern used for imaging in the information terminal's imaging section to adjust printing characteristics of a printing device that includes a recording head, wherein a density pattern for adjusting printing density, as one of the printing characteristics, is included in an imaging target region of the test pattern and the arrangement region of the density pattern within the imaging target region is symmetrical with respect to either the center of the imaging target region or a straight line passing through the center as the reference.