Photothermal Image Allocation for 3D Expansion Height
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Solution Overview
Problem
Existing photothermal conversion image generating devices require manual decision-making for allocating lines on the front or rear surface of a thermally expandable sheet, leading to complexity and variability in producing high-quality three-dimensional images, especially when dealing with numerous paths and lines.
Innovation Solution
A processor allocates lines based on pre-expansion or post-expansion line width and expansion height to determine whether to print them on the front or rear surface of the thermally expandable sheet, ensuring consistent and desired three-dimensional image formation without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If photothermal conversion image is drawn on the rear side of thermally expandable sheet, then heat is transmitted to expandable layer, but heat escapes in planar directions via base material and sufficient expansion height is not realized
Solution Approach 1:
The patent inverts the conventional approach by drawing the photothermal conversion image on the front side of the thermally expandable sheet instead of the rear side. This inversion allows heat to be generated directly at the expandable layer without passing through the base material, preventing heat escape in planar directions and achieving sufficient expansion height.
Solution Approach 2:
The patent changes the dimensional approach by moving the photothermal conversion image from the rear surface (two-dimensional plane) to the front surface, enabling direct vertical heat transmission to the expandable layer and eliminating horizontal heat dispersion through the base material.
2Adaptability or versatility
If manual decision-making is used for allocating lines to front or rear surface, then flexibility in handling different line types is maintained, but complexity and variability increase when dealing with numerous paths and lines
Solution Approach 1:
The patent implements an automatic allocation system where the processor autonomously determines whether to draw lines on the front or rear surface based on line width and expansion height requirements. This self-service mechanism eliminates manual decision-making complexity while maintaining adaptability to different line types through automated parameter-based classification.
Solution Approach 2:
The patent uses parameter-based automatic allocation where the processor changes the drawing surface (front or rear) based on specific parameters such as line width and required expansion height. This parameter-driven approach maintains versatility for different line types while eliminating manual decision complexity through automated classification rules.
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 enables stable and consistent formation of three-dimensional images by optimizing heat transmission and reducing variability, improving the quality and efficiency of the image generation process.
Implementation Method 1
a photothermal conversion layer, which converts light into heat
Implementation Method 2
an expandable layer that expands in accordance with the amount of heat absorbed thereby
Implementation Method 3
Heat is transmitted to the expandable layer via the base material
Data Source
AI summary
A photothermal conversion image generating device that generates a photothermal conversion image for forming a three-dimensional image by causing a thermally expandable sheet having a thermally expandable layer on a base material to expand, the device including: a processor that allocates, based on a line width of a line forming the three-dimensional image, an image for forming the line to either a front surface of the thermally expandable sheet or a rear surface of the thermally expandable sheet.