Print Controlling Device Selective Main Scanning Direction
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Solution Overview
Problem
Existing printing technologies require multiple main scanning operations to print images using multiple colors of ink, leading to increased ink usage and potential quality issues due to varying ink discharge orders, which can result in noticeable color boundaries and perceived low-quality prints.
Innovation Solution
A controlling device that selectively determines the direction of main scanning based on the presence and type of line image data, reducing the number of main scanning operations by identifying and processing only the necessary partial image data, thereby minimizing color image boundaries and improving print quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple main scanning operations are performed to print images using multiple colors of ink, then complete color image coverage is achieved, but the number of main scanning operations increases leading to increased ink usage and visible color boundaries
Solution Approach 1:
The patent segments the image data into different types (first type and second type) and processes them differently. By dividing the printing task into selective main scanning for first type data and regular main scanning for second type data, the system reduces unnecessary scanning operations while maintaining complete color coverage where needed.
Solution Approach 2:
The patent dynamically adjusts the printing mode based on the type of image data being processed. The controlling device selectively determines whether to perform main scanning or not, changing the printing strategy in real-time according to the data type, thereby optimizing both print quality and operational efficiency.
2Manufacturing precision
If multiple main scanning operations are performed with varying ink discharge orders, then complete color coverage is achieved, but color boundaries become noticeable and print quality deteriorates
Solution Approach 1:
The patent segments image data into first type (requiring main scanning) and second type (not requiring main scanning). This segmentation allows the system to avoid multiple ink discharge operations with varying orders for certain data types, thereby eliminating visible color boundaries while maintaining complete color coverage where necessary.
Solution Approach 2:
Instead of always performing main scanning for all image data, the patent inverts the approach by selectively omitting main scanning for second type data. This inversion reduces color boundary visibility by avoiding redundant ink discharge operations that create varying discharge orders.
3Manufacturing precision
If all line image data is processed in every main scanning operation, then complete image coverage is achieved, but unnecessary operations increase processing time and ink usage
Solution Approach 1:
The patent extracts and identifies first type line image data that requires main scanning from the overall image data. By taking out only the necessary data for main scanning processing, the system achieves complete image coverage while eliminating unnecessary processing time and ink usage associated with processing all line image data in every main scanning operation.
Solution Approach 2:
The patent applies partial action by performing main scanning only on first type line image data rather than all line image data. This partial processing approach maintains complete image coverage for areas that need it while avoiding excessive processing time and ink consumption in areas where main scanning is unnecessary.
Data Source
Figure 1
Figure 2(A1)~2(B2)
Figure 3(C1)~3(E2)
AI summary
In a case where N1 lines (N1 being less than N which is a number of nozzles included in one nozzle line) of target line image data represent N1 lines of target line images to be printed by only one specific color of ink, and (N-N1) lines of remaining line image data include line image data which represents a line image to be printed by two or more colors of ink, the controlling device (10) may select only the N1 lines of target line image data, so as to determine the opposite direction of the direction of the main scanning of a previous time as the direction of the main scanning of a present time.