Distendable Sheet Printing Image Displacement Correction
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Solution Overview
Problem
Conventional TD printing methods suffer from image displacement due to irregularities in the distending process, causing distortions in the final color image.
Innovation Solution
A printing method and apparatus that calculates the displacement amount of a predetermined pattern on a distendable sheet before and after distending, deforms the original image based on this displacement, and prints the deformed image to correct for distortion, using a control unit and thermal expansion machining unit to ensure accurate image placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional TD printing is used to form a color image on a distendable sheet, then the image can be printed, but the image becomes distorted and displaced due to irregularities in the distending process
Solution Approach 1:
The patent applies preliminary action by measuring the displacement amount of a predetermined pattern before the color image is printed, and then using this measured displacement to deform the original image in advance. This preliminary measurement and correction of displacement ensures that when the color image is printed after distending, the image remains accurate and undistorted, resolving the contradiction between manufacturing precision and distending process stability.
2Measurement precision
If a predetermined pattern is printed on the distendable sheet before distending to measure displacement, then the displacement amount can be calculated, but an additional printing step is required
Solution Approach 1:
The patent uses a predetermined pattern as a reference copy that is printed before distending. This pattern serves as a template or master copy that allows for accurate measurement of displacement during the distending process. By having this reference pattern, the system can precisely calculate how much the sheet displaced during distending, enabling accurate compensation without requiring complex measurement systems.
3Manufacturing precision
If the original image is deformed based on calculated displacement amount, then the final printed image is accurate, but the image processing complexity increases
Solution Approach 1:
The patent applies parameter changes by calculating the displacement amount as a specific parameter from the predetermined pattern, and then using this parameter to deform the original image. The image deformation is achieved by adjusting coordinates and pixel values based on the measured displacement parameter. This approach allows accurate distortion correction through systematic parameter adjustment rather than complex iterative processing, balancing precision with processing complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively addresses image displacement issues, improving print quality by ensuring that the final color image is printed without distortion, even when irregularities in the distending process occur.
Implementation Method 1
a light absorbing pattern of a gradation image based on distance image data or the like expressing a stereoscopic shape relative to the plane image is formed on a surface of a substrate corresponding to a reverse surface of the distend layer of the distendable sheet. Then, by irradiating the pattern with a light source from a substrate layer side, heat according to gradation of the image is generated and the microcapsules inside the distend layer are expanded.
Implementation Method 2
a TD image for distending is printed on a TD paper with a toner containing carbon black to generate a gray image for distending
Implementation Method 3
by irradiating the pattern with a light source from a substrate layer side, heat according to gradation of the image is generated
Data Source
AI summary
A printing method includes the steps of: printing a predetermined pattern on a distendable sheet before distending; distending the distendable sheet printed the predetermined pattern; calculating a displacement amount of the predetermined pattern between before and after the distending of the distendable sheet; deforming an original image by a deformation amount determined based on the calculated displacement amount; and printing the deformed original image as an image for printing on the distendable sheet.