Silicon Optical Interference Decorative Layer for Angle-Dependent Color
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Solution Overview
Problem
Existing decoration elements for mobile devices and electronic products lack the ability to display various colors on three-dimensional patterns and exhibit limited color changes depending on the viewing angle, making them unsuitable for diverse design requirements.
Innovation Solution
A decoration element comprising a light reflective layer and a light absorbing layer, where the light absorbing layer is made of silicon with varying thicknesses and inclined surfaces, allowing for constructive and destructive interference to produce specific colors that change with the viewing angle, and further enhanced by a color film to expand the range of obtainable colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If printing or deposition methods are used to provide colors on decoration elements, then color coverage is limited and requires multiple processes, but the manufacturing complexity and time increase significantly
Solution Approach 1:
The patent applies optical interference principles to create color changes on the decoration element surface. By controlling the thickness of the decorative layer (50-200 nm) and using the interference between light waves reflected from different interfaces, the structure generates iridescent colors without requiring traditional printing or deposition of multiple color layers. This single-layer thickness-controlled approach replaces complex multi-step coloring processes.
Solution Approach 2:
The patent changes the physical parameter of layer thickness to control color output. By varying the decorative layer thickness within 50-200 nm range, different colors are produced through optical interference. This parameter-based control method allows for color variation without adding manufacturing steps, directly addressing the contradiction between color versatility and process simplicity.
2Adaptability or versatility
If traditional deco films with fixed colors are used, then manufacturing is simple, but the ability to display various colors on three-dimensional patterns is limited
Solution Approach 1:
The patent applies local quality by allowing different regions of the decorative layer to have different thicknesses (50-200 nm) corresponding to different colors. This enables three-dimensional patterns to display heterogeneous colors naturally, with each region's color determined by its local thickness rather than requiring separate printing or deposition processes for each color zone.
Solution Approach 2:
The patent transitions from two-dimensional color application (printing on flat surfaces) to three-dimensional color expression by utilizing layer thickness variation. The decorative layer's thickness becomes the controlling dimension for color, enabling colors to be expressed on three-dimensional patterns and providing viewing-angle-dependent color changes that enhance the three-dimensional effect.
3Manufacturing precision
If a single material is used for the light absorbing layer, then composition uniformity is secured, but the range of obtainable colors is limited
Solution Approach 1:
The patent uses silicon as a single material for the light absorbing layer to ensure composition uniformity, but compensates for limited color range by changing the thickness parameter of the decorative layer (50-200 nm). The color variation is achieved through thickness control rather than material composition changes, maintaining manufacturing precision while enabling color diversity through optical interference effects.
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 solution enables the creation of a wide range of colors on three-dimensional patterns with significant color changes depending on the viewing angle, providing a more dynamic and versatile design option for mobile devices and electronic products.
Implementation Method 1
light absorption occurs in each of an entering path when external light enters through a decoration element and in a reflection path when reflected
Implementation Method 2
external light is reflected on each of a light absorbing layer surface and a light reflective layer surface
Implementation Method 3
constructive interference and destructive interference phenomena occur between reflected light on the light absorbing layer surface and reflected light on the light reflective layer surface
Implementation Method 4
constructive interference and destructive interference phenomena occur between reflected light on the light absorbing layer surface and reflected light on the light reflective layer surface
Data Source
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AI summary
The present disclosure relates to a decoration element comprising a light reflective layer, and a light absorbing layer provided on the light reflective layer and comprising Si. The present invention relates to a decorative member comprising: a light reflecting layer; and a light absorbing layer provided on the light reflecting layer, and containing Si.