Marginless Roll Paper Printing Scaling Control
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Solution Overview
Problem
Conventional marginless printing methods for inkjet printers, especially when using roll paper, often result in image loss or uneven margins due to fixed ink receiving slots and aspect ratio distortions, making it complicated for users to achieve optimal marginless printing without manual adjustments.
Innovation Solution
A printing system that includes a host device capable of setting the recording medium width and changing the image data scaling ratio accordingly, allowing the recording device to perform marginless recording by sending the scaled image data for optimal edge-to-edge printing on roll-shaped media, minimizing image loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If image data is enlarged to achieve marginless printing, then the printing coverage is improved, but the original image quality deteriorates due to aspect ratio distortion and image loss
Solution Approach 1:
The patent changes the scaling ratio parameter dynamically based on the relationship between image aspect ratio and paper aspect ratio. When the aspect ratios match, no scaling is applied (scaling ratio = 100%). When they differ, the scaling ratio is calculated to minimize image loss while maintaining quality, resolving the contradiction between achieving marginless printing coverage and preserving original image quality.
2Device complexity
If a fixed ink receiving slot is used for marginless printing, then the printing structure is simplified, but the adaptability to different paper widths is reduced
Solution Approach 1:
The patent introduces a movable ink receiving slot that can be dynamically adjusted along the paper width direction. This dynamic structure allows the slot to adapt to different paper widths while maintaining the simplicity of a single-slot design, resolving the contradiction between structural simplicity and adaptability.
3Manufacturing precision
If manual image enlargement is performed in application software, then the printing precision is improved, but the operation complexity increases
Solution Approach 1:
The patent enables the printer driver to automatically perform image scaling based on detected paper width and image aspect ratio. The system self-adjusts the scaling ratio without requiring manual intervention from the user, thereby maintaining high printing precision while eliminating the operational complexity of manual image enlargement in application software.
4Area of stationary object
If the image is printed slightly beyond paper edges, then the marginless printing effect is achieved, but the image loss increases due to protruding areas
Solution Approach 1:
The patent dynamically adjusts the scaling ratio parameter to minimize the protruding areas beyond paper edges. By calculating the optimal scaling ratio based on aspect ratio relationships, the system achieves marginless printing coverage while minimizing image loss in the protruding areas, resolving the contradiction between printing coverage and image loss.
Data Source
AI summary
A printing system performing marginless printing. The system includes a host device operable to send image data, and a recording device performs marginless recording based on the image data received from the host device. The system includes a setting unit setting the width of the recording medium, a changing unit changing scaling ratio of the image data based on the width of the recording medium. Furthermore the system includes a recording unit recording the image on the recording medium based on the image data with the changed scaling ratio. An image is enlarged/reduced to the width of the roll paper sheet, thereby loss portions in the longitudinal direction are controlled to a minimum.