Embossed Sheet Reflective Portions Teri Luster
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Solution Overview
Problem
Conventional decorative sheets fail to accurately reproduce the anisotropic luster known as 'teri' found in natural wood-grain patterns, which is attributed to the fibrous structure of wood, as they do not effectively mimic the directional reflection and scattering of light.
Innovation Solution
An embossed sheet with a translucent base and strategically designed reflective portions that have varying gradient angles between ±40 degrees, allowing for directional light reflection and scattering, is used to replicate the teri effect, incorporating rectilinear or curvilinear shapes on cross-sections to achieve anisotropic reflection patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional decorative sheets with printed wood-grain patterns are used, then the design can be simplified and manufacturing is easier, but the anisotropic luster effect (teri) of natural wood cannot be reproduced
Solution Approach 1:
The patent applies parameter changes by controlling the gradient angles of reflective portions within specific ranges (±40 degrees) to achieve the desired anisotropic luster effect. By adjusting these angular parameters, the sheet reproduces the teri characteristic of natural wood while maintaining manufacturability through controlled manufacturing processes.
Solution Approach 2:
The patent implements local quality by creating reflective portions with specific gradient angles at particular locations on the sheet. Different regions have different gradient orientations (within ±40 degrees), which locally reproduces the anisotropic reflection characteristics of wood fibers while maintaining overall manufacturing feasibility.
2Manufacturing precision
If reflective portions with varying gradient angles are added to reproduce teri effect, then the luster reproduction accuracy improves, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the sheet surface into multiple reflective portions, each with specific gradient angles. This segmentation allows the complex anisotropic luster effect to be reproduced through multiple simpler reflective elements rather than requiring a single complex structure.
Solution Approach 2:
The patent controls the gradient angles of reflective portions within the range of ±40 degrees, using parameter changes to achieve the desired optical effect. This parameter control simplifies the manufacturing process while maintaining high luster reproduction accuracy.
3Manufacturing precision
If the gradient angle range is controlled within ±40 degrees, then the manufacturing precision for luster reproduction is improved, but the design flexibility is reduced
Solution Approach 1:
The patent uses parameter changes by defining the gradient angle range within ±40 degrees, which provides sufficient flexibility for various design applications while maintaining manufacturing precision. This parameter range allows different patterns and orientations to be achieved without requiring excessive manufacturing 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
The embossed sheet successfully reproduces the luster with teri characteristics by reflecting light at different angles, providing a realistic wood-grain texture and enhancing the appearance of natural wood patterns, while protecting the printed surface from degradation.
Implementation Method 1
Each reflective main surface includes a rectilinear portion or a curvilinear portion on a first cross-section perpendicular to the one surface, and a rectilinear portion or a curvilinear portion on a second cross-section intersecting with the one surface and the first cross-section. A gradient of a tangent line at a rectilinear or curvilinear portion at a center position of the reflective main surface including the rectilinear portion or the curvilinear portion on the first cross-section in relation to the one surface varies within a range of −40 degrees or more and 40 degrees or less in each of the plurality of reflective portions.
Data Source
AI summary
An embossed sheet configuring a decorative sheet includes a sheet-shaped base that has translucency, and a plurality of reflective portions provided on one surface of the base. Each of the plurality of reflective portions has a reflective main surface that reflects incident light, and connecting surfaces that are provided between the reflective main surface and the base. Each reflective main surface is rectilinear on a first cross-section and curvilinear on a second cross-section. A gradient of a straight line at a center position of the reflective main surface that is rectilinear on the first cross-section, in relation to the one surface of the base, varies within a range of ±40 degrees in each of the plurality of reflective portions. As a result, the reflective portion can reflect incident light at regular and non-regular angles.