Printing System Test-Pattern Layout for Shadow Reduction
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Solution Overview
Problem
Inkjet printers face challenges in achieving accurate image quality due to difficulties in adjustment, especially when general users attempt corrections without proper tools, and using separate imaging devices introduces shadows that affect print correction data accuracy.
Innovation Solution
A printing system with an integrated imaging terminal that captures a test pattern with a specific layout, where the ruled line pattern is on the near-side and gradation pattern on the far-side, minimizing shadow interference, and an imaging data storage program ensures correct image data capture and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate imaging device is used to capture the test pattern, then adjustment accuracy is improved, but shadow interference occurs and measurement precision deteriorates
Solution Approach 1:
The patent introduces a direction display pattern with near-side and far-side indicators to add spatial dimension information to the test pattern. This allows the imaging device to understand the intended capture direction and position, enabling it to adjust its imaging angle or position to avoid shadow interference while maintaining measurement precision.
Solution Approach 2:
The control section uses the direction display pattern to provide feedback on whether the test pattern is being captured from the correct direction. By analyzing the relative positions of the near-side and far-side patterns in the captured image, the system can determine if shadow interference is present and guide the user to recapture the image from the proper angle.
2Measurement precision
If the imaging device is positioned close to the test pattern, then image quality is improved, but shadow effects increase and measurement precision deteriorates
Solution Approach 1:
By incorporating directional indicators that show near-side and far-side orientations, the patent enables the imaging device to capture images from optimized angles. The control section processes this directional information to determine the best imaging position that maintains image quality while minimizing shadow effects from the imaging device itself.
3Measurement precision
If a dedicated sensor is installed in the printing device, then adjustment accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the printing device's control section multi-functional by enabling it to process directional information from the direction display pattern and guide the imaging process. This eliminates the need for a dedicated sensor while maintaining adjustment accuracy, as the existing control hardware is utilized for both printing control and imaging guidance functions.
Solution Approach 2:
The printing device generates and includes the direction display pattern as part of the test pattern itself, making the system self-sufficient for providing directional guidance. The control section then uses this self-provided information to guide the external imaging device, eliminating the need for additional dedicated sensing components.
Data Source
AI summary
A printing system 10 includes a printing device 20 and an information terminal 30. The test pattern includes a ruled line pattern KP, a gradation pattern VP, and direction display patterns DPF and DPR that indicates at least one of a near-side and a far-side in a first direction. In the first direction, the ruled line pattern KP and the gradation pattern VP do not overlap, the ruled line pattern KP is arranged on the near-side in the first direction, and the gradation pattern VP is arranged on the far-side.