Print Data Editing Device Peak Current Suppression
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Solution Overview
Problem
Conventional printing devices face challenges in maintaining printing quality due to limited peak current supply, leading to noticeable edits in print images when shifting dot lines, which affects reproducibility and visibility of edited areas.
Innovation Solution
A print data editing device and method that edits print data by maximizing coincidence between input and output image columns through controlled shifting in the sub-scanning direction, while keeping absolute differences in shift amounts between neighboring columns minimal, to suppress peak current and enhance printing quality without sacrificing speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If dots are shifted in one predetermined dot line to another dot line to suppress peak current, then power supply limitation is resolved, but printing quality deteriorates and edited areas become noticeable
Solution Approach 1:
The image is divided into multiple columns, and each column is shifted by a different shift amount in the sub-scanning direction. This segmentation allows the peak current to be suppressed while distributing the shifts across multiple columns rather than concentrating them in one line, thereby reducing noticeable editing artifacts.
Solution Approach 2:
Different columns are assigned different shift amounts based on their local characteristics. The shift amount for each column is determined to maximize coincidence between the shifted dots and the original image, ensuring that each local region maintains optimal printing quality while contributing to overall peak current suppression.
2Power
If dots are shifted to suppress peak current, then power supply constraints are met, but reproducibility of input image deteriorates
Solution Approach 1:
The system calculates coincidence values between shifted dots and original image dots for each column, and uses this feedback to determine the optimal shift amount. This feedback mechanism ensures that the shifts maintain maximum coincidence, thereby preserving image reproducibility while still achieving peak current suppression.
Solution Approach 2:
The shift amount is changed for each column based on calculated coincidence values, rather than applying a uniform shift. This parameter variation allows the system to adapt to local image characteristics and maintain reproducibility across different regions while suppressing peak current.
3Power
If partial dot line shifting is performed, then peak current is reduced, but edited areas become easily noticeable
Solution Approach 1:
By dividing the image into multiple columns and applying different shift amounts to each, the editing artifacts are distributed and minimized across the entire image rather than concentrated in one area. This makes the edited areas less noticeable while still achieving peak current reduction.
Solution Approach 2:
The shift amount is dynamically determined for each column based on coincidence calculations, allowing the system to adapt to local image features. This dynamic adjustment ensures that shifts are optimized for each region, reducing the visibility of edited areas while maintaining peak current suppression.
Data Source
AI summary
A print data editing device is configured to perform: editing print data such that when dots constituting an input image represented by the print data are compared by units of columns before and after the editing, a coincidence is maximized when an image of each column in the input image after the editing is the same position as an image of the corresponding column in the input image before the editing or is shifted by a corresponding shift amount in a sub-scanning direction relative to the image of the corresponding column in the input image before the editing. An absolute value of at least one of shift amounts for columns in the input image after the editing is one dot or greater. An absolute difference value for any two neighboring columns in a main scanning direction in the input image after the editing is one dot or less.