Image Data Transfer Control for Print Head Inclination
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Solution Overview
Problem
In electrophotographic printers, the inclination of the print head can lead to shifts in the sub-scanning direction, affecting image quality, and existing solutions struggle to balance precision correction with data transfer efficiency.
Innovation Solution
An image data transfer control device and method that includes a processor and memory to read and correct image data in predetermined units, using inclination correction data to select and output specific divided image lines to the print head, thereby reducing the influence of print head inclination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image data is corrected for print head inclination, then manufacturing precision is improved, but data transfer efficiency deteriorates
Solution Approach 1:
The patent divides image data into multiple divided image lines and processes them in predetermined units. The image data transfer control unit selectively outputs specific divided image lines to the print head based on inclination correction data, rather than processing the entire image. This segmentation allows precise correction of inclination errors while maintaining efficient data transfer by only transmitting necessary image line segments.
2Reliability
If all divided image lines are processed, then completeness of image data is improved, but data transfer time increases
Solution Approach 1:
The patent extracts and selectively outputs only the specific divided image lines that are necessary for printing, based on inclination correction data. The image data transfer control unit identifies which divided image lines from the plurality of divided image lines need to be output to the print head, extracting only the relevant portions rather than transferring all image data. This reduces data transfer time while ensuring completeness of the necessary image information.
3Manufacturing precision
If inclination correction is applied to all image lines, then manufacturing precision is improved, but storage capacity requirements increase
Solution Approach 1:
The patent applies inclination correction selectively to specific divided image lines rather than uniformly to all image lines. The image data transfer control unit uses inclination correction data to determine which specific divided image lines require correction and outputs only those lines to the print head. This local quality approach maintains high inclination correction accuracy where needed while reducing overall storage capacity requirements by not processing unnecessary image lines.
Data Source
AI summary
An image data transfer control device includes a first interface, a first and a second memory, a processor, and a second interface. The first interface acquires image data transferred in predetermined units. The first memory stores inclination correction data corresponding to the inclination of a print head, and correction position data indicating a correction position included in at least one divided image line among the predetermined number of divided image lines including each divided image line group. The second memory stores correction target image data at the correction position. The processor selects each divided image line group based on the inclination correction data, and specifies first and second correction target image data. The second interface outputs the second divided image line group including the first correction target image data instead of the second correction target image data.