Transparent Plastic Material Lateral Light Scattering
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Solution Overview
Problem
Existing transparent plastic materials used in motor vehicle light sources exhibit low lateral light scattering when not shaped as a lens, making it difficult to recognize the light source from lateral angles, which is a safety concern.
Innovation Solution
Embedding a scattering medium, such as calcium aluminum borosilicate or natural mica, within the plastic material to enhance lateral light scattering while maintaining a clear and transparent appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transparent plastic material is used without a scattering medium, then the material maintains good transparency and clear visual impression, but the lateral light scattering is relatively low making the light source difficult to recognize from lateral angles
Solution Approach 1:
The patent applies composite materials by embedding scattering medium particles (such as calcium aluminum borosilicate, natural mica, silicon dioxide, titanium dioxide, or tin oxide) within the transparent plastic material matrix. This creates a composite structure where the plastic provides transparency and the embedded particles provide lateral light scattering, resolving the contradiction between maintaining visual clarity and improving light scattering performance.
Solution Approach 2:
The patent applies local quality by distributing scattering medium particles selectively within specific regions of the plastic material. The particles are embedded at controlled concentrations (up to 10% by weight of the plastic material) and specific grain sizes (0.0001 μm to 2000 μm, particularly 30 μm to 300 μm) to achieve localized light scattering effects in specific angular ranges (particularly up to 15°) while preserving overall material transparency.
2Illumination intensity
If the plastic material is not designed in the shape of a lens or profiled, then manufacturing is simpler and cost is reduced, but lateral light scattering is insufficient for safety reasons
Solution Approach 1:
The patent applies parameter changes by modifying the optical properties of the plastic material through the addition of scattering medium particles with specific characteristics. By controlling particle type, concentration (up to 10% by weight), and grain size (0.0001 μm to 2000 μm, particularly 30 μm to 300 μm), the material achieves enhanced lateral light scattering without requiring complex lens shapes or profiles, thus improving safety while maintaining manufacturing simplicity.
3Illumination intensity
If scattering medium is embedded in the plastic material, then lateral light scattering is improved, but the material composition becomes more complex
Solution Approach 1:
The patent applies parameter changes by optimizing the concentration and grain size of scattering medium particles to achieve effective light scattering at relatively low添加 amounts (up to 10% by weight of the plastic material). This allows significant improvement in scattered light intensity (up to 100% increase compared to material without scattering medium) while minimizing the complexity increase of the material composition.
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 improves lateral light scattering, particularly in angular ranges up to 15°, increasing scattered light intensity by up to 100% without compromising the transparent visual impression, allowing for greater design freedom in headlight shape for aerodynamic and optical reasons.
Implementation Method 1
a scattering medium is embedded in the plastic material, which causes lateral light scattering in at least one transillumination direction
Data Source
AI summary
The invention relates to a transparent plastic material, such as polycarbonate, high-temperature polycarbonate, polymethyl acrylate, or acrylonitrile butadiene styrene (ABS). Such transparent plastic materials are known from industry and are used in particular as diffusers in automotive light sources or signal light sources. To provide a transparent plastic material with improved lateral light scattering, a scattering medium is to be embedded in the plastic material, which causes lateral light scattering in at least one direction of transmission.