Copper Oxide Decorative Member for Viewing-Angle Color Variation
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Solution Overview
Problem
Existing decorative films for cosmetic containers and electronic products require multiple printing processes to achieve heterogeneous colors on three-dimensional patterns and exhibit limited color variation with fixed colors depending on the viewing angle.
Innovation Solution
A decorative member with a light absorbing layer containing copper oxide (CuOx) and a light reflective layer, where the copper and oxygen content ratio and thickness of the absorbing layer are adjusted to achieve warm tone colors and dichroism, allowing color variation based on viewing direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple printing processes are used to achieve heterogeneous colors on three-dimensional patterns, then color diversity is improved, but manufacturing complexity increases
Solution Approach 1:
The patent changes the material composition parameter by incorporating copper oxide particles with specific size distributions (D10: 1-10 μm, D50: 11-20 μm, D90: 21-30 μm) into the decorative film. This single parameter change enables the film to exhibit different colors at different viewing angles, achieving heterogeneous color effects without requiring multiple printing processes. The specific particle size distribution controls light scattering and interference to produce warm tone colors that vary with viewing direction.
Solution Approach 2:
The patent uses a composite material system consisting of a base resin matrix combined with copper oxide particles of different sizes. This composite structure creates optical interference and scattering effects that produce diverse color appearances from a single layer, eliminating the need for multiple printing steps while maintaining color diversity and heterogeneity across three-dimensional patterns.
2Ease of manufacture
If fixed colors are used in decorative films, then manufacturing simplicity is maintained, but color variation with viewing angle is limited
Solution Approach 1:
The patent introduces copper oxide particles with a specific size distribution into the decorative film, which changes the optical parameters of the material. This enables the film to display varying colors depending on the viewing angle while maintaining a simple single-layer manufacturing process. The particle sizes (D10: 1-10 μm, D50: 11-20 μm, D90: 21-30 μm) are specifically controlled to create optical interference that produces warm tone color variations without complex manufacturing.
3Illumination intensity
If copper oxide content is increased to enhance warm tone color, then color intensity is improved, but element content ratio control becomes more difficult
Solution Approach 1:
Instead of simply increasing the total copper oxide content, the patent optimizes the element content ratio by controlling the size distribution of copper oxide particles. The specific distribution (D10: 1-10 μm, D50: 11-20 μm, D90: 21-30 μm) creates optimal optical interference for warm tone colors. This approach achieves high color intensity while maintaining precise control over the Cu:O element ratio through particle size control rather than bulk composition adjustment.
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 decorative member displays warm tone colors with improved visibility and dichroism, enabling dynamic color changes based on viewing angle without the need for multiple printing processes.
Implementation Method 1
a light absorbing layer (301) provided on the light reflective layer (201), wherein the light absorbing layer includes a copper oxide (Cu a O x )
Implementation Method 2
a light reflective layer (201) and a light absorbing layer (301) provided on the light reflective layer (201)
Data Source
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AI summary
The present application relates to a decorative member including a color developing layer including a light reflective layer and a light absorbing layer provided on the light reflective layer; and a substrate provided on one surface of the color developing layer, wherein the light absorbing layer includes a copper oxide (CuaOx).