Decorative Article with Segmented Colour Coatings for Angle-Dependent Effects
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Solution Overview
Problem
Existing decorative elements with multi-coloured effects using interference colour coating systems are unpredictable and inconsistent due to light wave interference, and these systems are often damaged by high temperatures, making them unsuitable for applications like high-temperature cast-in-place jewellery methods.
Innovation Solution
A decorative article with a changeable observed colour effect based on viewer angle, featuring a decorative element with a front side and a back side. The back side has a first region and a second region, each coated with a different colour effect coating. The first coating is applied in the first region, and the second coating is applied in the second region, creating a predictable colour change when viewed from different angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If interference colour coating systems are used to achieve multi-coloured effects, then the decorative element appears multi-coloured, but the colour effects are unpredictable and inconsistent due to light wave interference
Solution Approach 1:
The back surface is divided into multiple distinct regions, with each region receiving a different colour coating. This segmentation eliminates the unpredictable light wave interference effects of conventional interference coatings by using separate, discrete colour zones rather than relying on thin-film interference patterns that vary with viewing angle and lighting conditions.
Solution Approach 2:
Different regions of the back surface are assigned different colour properties through selective coating application. Each local region has a specific colour characteristic that contributes to the overall multi-coloured effect, allowing predictable colour distribution across the decorative element surface.
2Ease of manufacture
If interference colour coating systems are used, then multi-coloured effects are achieved, but the coatings are easily damaged when subjected to high temperatures
Solution Approach 1:
The patent uses conventional colour coatings that can be applied through standard coating processes rather than delicate interference coatings. These coatings are more robust and can withstand high temperatures, making them suitable for applications like cast-in-place jewellery manufacturing where heat exposure occurs.
Solution Approach 2:
The decorative element combines multiple colour coatings in different regions on the back surface, creating a composite coating structure. This allows the use of heat-resistant conventional coating materials in each region while achieving the overall multi-coloured effect, rather than relying on temperature-sensitive interference coatings.
3Ease of manufacture
If a single colour coating is applied to the back surface, then the manufacturing process is simple, but the observed colour effect does not change predictably with viewing angle
Solution Approach 1:
The back surface is segmented into multiple regions, each coated with a different colour. This segmentation enables the decorative element to display different colours from different viewing angles, as light reflects from different coloured regions depending on the observer's position, creating a dynamic colour effect while maintaining relatively simple coating processes.
Solution Approach 2:
The patent introduces spatial dimensionality to the colour effect by distributing different colours across different regions of the back surface. This creates viewing-angle-dependent colour changes as observers move, adding versatility to the decorative element without requiring complex interference coating techniques.
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 achieves a predictable and consistent change in observed colour effect with viewer angle, while also ensuring the coatings are resistant to high temperatures, making the decorative article suitable for various applications, including high-temperature jewellery methods.
Implementation Method 1
A proportion of light is reflected off the partially-transparent layer, and a proportion is transmitted through the partially-transparent layer and reflected off the reflective layer
Data Source
AI summary
A decorative article (100) having an observed colour effect that is changeable depending on observer (200) viewing angle, the article comprising: a decorative element (110) comprising a front side (114) facing a forward direction and a back side (112) opposite the front side facing a rearward direction, wherein the back side comprises a back surface (113) having a first region (122) and a second region (124) surrounding the first region; a first coating (132) arranged on the first region of the back surface, the first coating causing a first colour effect (102); and a second coating (134) arranged on the second region of the back surface, the second coating causing a second colour effect (104) that differs from the first colour effect.