Sol-Gel Ceramic Layer for Glare Reduction on Enamel Panels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing visual communication panels with porcelain or vitreous enamel surfaces suffer from glare due to smooth enamel coatings, making it difficult to write or project effectively under light, and are not scratch-resistant, leading to a shorter lifespan compared to organic panels.
Innovation Solution
A method involving a sol-gel dispersion applied to the enamel surface, tempered to form a glassy or ceramic layer with metal oxide particles and fluorine-containing products, reducing glare and enhancing wear resistance by diffusing incident light and lowering surface tension for easy ink removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a smooth enamel coat is applied to the panel surface, then the panel becomes easy to wipe with felt-tip pens, but light reflections and glare increase making it difficult to see what is being written or projected
Solution Approach 1:
The patent applies a matting layer only to the surface region of the enamel coat, creating a localized change in surface properties. This matting layer has a different surface finish (matte vs. glossy) while the underlying enamel remains intact, allowing the surface to be easy to wipe while reducing glare through the matte finish.
Solution Approach 2:
The patent creates a composite structure by combining the enamel coat with a matting layer. This composite material approach allows the panel to simultaneously possess the ease-of-wiping property of smooth enamel and the glare-reduction property of matte surfaces, resolving the contradiction between these two requirements.
2Object-affected harmful factors
If a matting layer is applied to reduce light reflections, then glare is reduced, but the surface becomes more difficult to wipe in a dry manner
Solution Approach 1:
The matting layer is applied as a thin surface coating that locally modifies the surface properties without fundamentally changing the underlying enamel's wipeability. The localized matting effect reduces glare while preserving the ease of wiping through the underlying smooth enamel structure.
Solution Approach 2:
The composite structure of enamel coat combined with matting layer allows the panel to achieve both glare reduction and ease of wiping. The enamel provides the wipeable surface while the matting layer provides the glare-reducing matte finish, and together they resolve the contradiction between these properties.
3Ease of manufacture
If organic panels with lacquered steel are used, then the panels are easier to manufacture, but they are less scratch-resistant and wear-resistant leading to shorter lifespan
Solution Approach 1:
The patent uses a composite structure combining enamel coat with matting layer to create a surface that is both easy to manufacture and highly resistant to scratching and wear. The enamel provides durability and scratch resistance while the matting layer adds wear resistance, surpassing the performance of organic lacquered panels.
Solution Approach 2:
The patent changes the material parameters by using inorganic enamel materials instead of organic lacquered materials. This parameter change from organic to inorganic composition fundamentally improves the scratch resistance and wear resistance while maintaining ease of manufacture through standard enamel application processes.
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 significantly reduces glare and increases the panel's hardness and resistance, allowing for effective writing and projection without annoying reflections and improving durability beyond organic panels.
Implementation Method 1
a sol-gel dispersion is provided on the visible side of the coat of porcelain or vitreous enamel which is then tempered in order to form a mainly glassy or ceramic cover layer
Implementation Method 2
by providing the above-mentioned particles in the cover layer on the coat of enamel, the incident light on the panel is diffused, such that the glare of the panel is reduced
Implementation Method 3
the thickness of the sol-gel coat is designed to be equal to one fourth of the wavelength of visible light, resulting in a sol-gel thickness of between 75 and 180 nanometres. In this way the sol-gel coat forms a quarter wavelength anti-reflection layer
Implementation Method 4
both reflected waves are out of phase by 180° or π radians, and as a consequence they at least partially cancel each other
Implementation Method 5
the above-mentioned dispersion contains fluorine containing products. Adding fluorine containing products to the above-mentioned dispersion offers the advantage that the surface tension of the finished cover layer is relatively low, as a result of which the ink of felt-tip pens can be removed relatively easily from the cover layer in a dry manner
Data Source
Figure 1
AI summary
Method for manufacturing a visual communication panel (1) which mainly consists of a support (2) onto which is provided a coat of porcelain or vitreous enamel (4), characterised in that a sol-gel dispersion is provided on the visible side of the coat of porcelain or vitreous enamel (4) which is subseguently tempered so as to form a mainly glassy or ceramic cover layer (5).