Ceramic Tile Glaze Relief for Diffuse Light Reflection

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Solution Overview

Problem

Existing ceramic tiles with printed patterns, such as wood grain, often have a monotonous surface and artificial relief, leading to issues like height differences when installed, especially in offset relationships, which are noticeable under light.

Innovation Solution

The ceramic tile features a relief with structural features that correspond to the printed pattern, including excavations in the glaze layer, combined with irregular or random relief features to create a more natural and less artificial appearance, reducing noticeable height differences when installed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a printed pattern is applied to the ceramic tile surface, then the aesthetic appearance is improved, but the surface becomes monotonous and artificial

Engineering Contradiction:
Improveaesthetic appearanceVSAvoidsurface monotony
Core Design Contradiction:
Illumination intensityVSDevice complexity

Solution Approach 1:

The patent applies different relief structures at different locations on the tile surface. Specifically, it creates relief features that correspond to the printed pattern (such as wood grain lines) while also incorporating irregular random relief features distributed across the surface. This local differentiation makes each area of the tile have unique characteristics, preventing monotony while maintaining the aesthetic printed pattern.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent introduces asymmetric and irregular relief features that do not follow a uniform pattern. The random distribution of relief features with varying sizes, shapes, and depths creates an asymmetric surface structure that mimics natural variations found in real wood or stone, thereby reducing the artificial appearance of the printed pattern.

Inventive Principle:
Principle #4Asymmetry

2Illumination intensity

If relief features are added to the ceramic tile surface, then the natural appearance is improved, but height differences become noticeable when tiles are installed in offset relationships

Engineering Contradiction:
Improvenatural appearanceVSAvoidheight differences
Core Design Contradiction:
Illumination intensityVSShape

Solution Approach 1:

The patent creates relief features with locally varied depths and dimensions. The relief features are not uniform across the entire tile surface but are distributed irregularly with varying prominence. This local variation causes light to reflect differently at different points, diffusing the overall light reflection and making height differences less noticeable when tiles are installed in offset relationships.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent converts the potentially harmful effect of height differences and light reflection into a beneficial effect. By introducing irregular relief features, the patent transforms the mirror-like light reflection that highlights height differences into diffuse light reflection that masks height differences. The same relief features that create natural appearance also serve to diffuse light, turning what could be a defect into an aesthetic advantage.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

3Ease of manufacture

If a smooth glaze layer is applied, then the surface is easy to manufacture, but light reflects in a mirror-like manner creating a white surface appearance

Engineering Contradiction:
Improvesurface smoothnessVSAvoidlight reflection
Core Design Contradiction:
Ease of manufactureVSIllumination intensity

Solution Approach 1:

The patent maintains the ease of manufacturing a glaze layer while introducing localized variations in the glaze surface. The glaze layer is applied uniformly for ease of manufacture, but then relief features are created within or on the glaze layer at specific locations. This creates local variations in surface topology that diffuse light reflection while maintaining the overall manufactured quality of the glaze application.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent changes the surface parameters of the glaze layer by introducing relief features with varying depths, heights, and distributions. This transforms the uniform smooth surface parameters into varied surface parameters that scatter light. The glaze material itself remains the same, but its surface topology parameters are modified to achieve diffuse reflection while maintaining manufacturing simplicity.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP3808921B1Ceramic tile and method for manufacturing ceramic tiles
Publication Date: 2025.09.10 UNILIN BVBA
  • EP3808921B1 patent drawingFigure 1~4

AI summary

Ceramic tile having a ceramic base layer and a cover glaze layer comprising a printed pattern, characterized in that the surface of the ceramic tile comprises a relief having structural features corresponding to said printed pattern. The invention further concerns a method which allows for the manufacturing of such ceramic tiles.