Tire Sidewall Coded Matrix Symbol Luminosity Contrast
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Solution Overview
Problem
The existing tire sidewall markings and codes face challenges in visibility due to the dark rubber material, especially under non-ideal lighting conditions and when dirt accumulates, leading to reduced readability and potential data unavailability.
Innovation Solution
A tire with a coded matrix symbol featuring dark parts with luminosity between 5 and 18 and light parts with luminosity between 20 and 35, optimized through laser engraving and surface treatment to enhance contrast and durability, allowing for reliable decoding even under adverse conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional printing methods are used on dark rubber sidewalls, then the code can be applied to the tire, but the readability and visibility of the code deteriorates under non-ideal lighting conditions and when dirt accumulates
Solution Approach 1:
The patent applies color contrast principles by creating a coded matrix symbol with light parts (luminosity L*1 between 70-90) and dark parts (luminosity L*2 between 20-40) on the dark rubber sidewall. This luminosity differential ensures the code remains readable under various lighting conditions and when dirt accumulates, as the high contrast between light and dark parts maintains visibility.
Solution Approach 2:
The patent changes the physical parameters of the code elements by specifying precise luminosity ranges for light and dark parts, and defining geometric parameters such as dark part dimensions (0.2mm to 1mm) and partition thickness. These parameter optimizations ensure the code maintains readability across different lighting conditions and dirt accumulation scenarios.
2Reliability
If the coded matrix symbol uses high contrast colors for visibility, then readability improves, but the durability and resistance to dirt accumulation deteriorates
Solution Approach 1:
The patent uses luminosity-based color differentiation where light parts have L*1 between 70-90 and dark parts have L*2 between 20-40. This high luminosity contrast enables accurate data recovery even when dirt accumulates on the sidewall, as the fundamental luminosity difference remains detectable despite surface contamination.
3Ease of operation
If the dark parts are made larger for easier decoding, then decoding facilitation improves, but the area available for other code elements deteriorates
Solution Approach 1:
The patent optimizes the size parameters of dark parts by specifying dimensions between 0.2mm to 1mm, which balances decoding ease with space efficiency. This parameter optimization allows sufficient contrast for easy decoding while maintaining adequate area for completing the matrix code structure within the available sidewall space.
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 ensures optimal readability and reliability of the coded matrix symbol, facilitating data recovery with minimal error, even as the tire ages and is subjected to wear and tear, using both professional and non-professional decoding methods like smartphones.
Implementation Method 1
the dark parts are produced by a laser engraving process after this molding operation
Data Source
Figure 1~4
Figure 5A~11B
Figure 12~15
AI summary
A tyre made of a rubber material, in which at least one of the sidewalls (2) comprises a coded matrix symbol (3) integral with the sidewall (2), said coded matrix symbol (3) comprising dark portions (5) and light portions (4), the light portions (4) having a first brightness value that is greater than a second brightness value of the dark portions (5) by at least 5 points.