Tire Decorative Region Micro-Protrusions Contrast
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Solution Overview
Problem
Current tire designs fail to adequately enhance the visibility of markings due to insufficient contrast between decorative and non-decorative regions, necessitating improved techniques to increase visibility.
Innovation Solution
A tire with a decorative region featuring micro-protrusions that include recesses and wall portions with a slant upper end surface, where the micro-protrusions are densely arranged to absorb and diffuse light, creating a matte-black appearance and increasing contrast with adjacent non-decorative regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional smooth or simple textured surfaces are used on tire sidewalls, then manufacturing is simple and cost-effective, but the contrast between decorative regions and markings is insufficient, reducing visibility
Solution Approach 1:
The decorative region is segmented into multiple micro-protrusions (2-10 per sq·mm) instead of using a smooth surface. Each micro-protrusion is further segmented into a body portion and a wall portion, with the wall portion containing a recess. This segmentation creates multiple light interaction surfaces that enhance light absorption and diffusion, achieving a matte-black appearance with superior contrast for markings.
Solution Approach 2:
The micro-protrusions are selectively applied only to the decorative region adjacent to markings, while the marking areas themselves remain smooth. This local differentiation creates a strong visual contrast between the matte-black decorative region and the reflective marking surfaces, improving visibility without requiring complex structures across the entire tire surface.
2Illumination intensity
If micro-protrusions with simple geometric shapes (e.g., circular truncated cones) are used, then manufacturing precision requirements are lower, but light absorption and diffusion effects are insufficient to achieve adequate matte-black appearance
Solution Approach 1:
Each micro-protrusion is divided into a body portion and a wall portion, with the wall portion containing a recess. This segmentation creates multiple light interaction surfaces - the sloped wall surfaces diffuse light while the recess absorbs light. The combination of these segmented structures achieves superior light absorption and diffusion effects compared to simple geometric shapes, while the regular repeating pattern facilitates manufacturing.
Solution Approach 2:
The micro-protrusions are arranged in a two-dimensional pattern (2-10 per sq·mm) across the decorative region surface. This spatial arrangement in another dimension creates a cumulative light absorption and diffusion effect that enhances the matte-black appearance, transforming a surface-level aesthetic problem into a three-dimensional optical solution.
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 described tire design significantly improves the visibility of markings by creating a higher contrast between decorative and non-decorative regions through the synergistic effect of light absorption and diffusion, resulting in enhanced visibility and durability of the tire's appearance.
Implementation Method 1
the light irradiated on the apex of the micro-protrusion is partly absorbed by the recess
Implementation Method 2
partly reflected by the upper end surface of the wall portion
Implementation Method 3
the reflected light is diffused by the upper end surface with the peak and bottom points
Data Source
AI summary
A tire has a visible outer surface comprising a decorative region provided with a plurality of micro-protrusions each comprising a recess and a wall portion. The wall portion surrounds the recess to form a protrusion's apex having an upper surface, and the upper surface of the wall portion comprises a peak point and a bottom point in a protruding-height direction of the micro-protrusion, wherein a protruding amount at the peak point is larger than a protruding amount at the bottom point.