Scattering Particle Composition for Uniform Light Diffusion
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Solution Overview
Problem
Existing transparent materials used in lighting applications face challenges in achieving homogeneous light diffusion and reduced color shift, particularly in light guides and diffusing bodies, due to variations in light transmission and intensity with wavelength and color tone.
Innovation Solution
A composition comprising inorganic particles with specific refractive indices and particle diameters, combined with other particles differing in refractive index or diameter, is incorporated into a transparent material at a specific concentration, ranging from 0.1 to 10 wt%, to achieve homogeneous light transmission and reduced color shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If scattering particles are added to transparent materials to diffuse light, then light diffusion is improved, but color shift increases and light transmission homogeneity deteriorates
Solution Approach 1:
The patent applies parameter changes by carefully controlling the particle size distribution (D10, D50, D90 values), refractive index differences, and concentration ranges of scattering particles to optimize light diffusion while maintaining transmission homogeneity and minimizing color shift
Solution Approach 2:
The patent uses composite materials by combining transparent polymer matrices with specifically formulated inorganic scattering particles (such as TiO2, SiO2, BaSO4) having controlled size distributions and refractive indices to achieve superior optical properties
2Illumination intensity
If scattering particles are added to transparent materials to diffuse light, then light diffusion is improved, but color shift increases
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive index difference between particles and matrix, controlling particle size distribution within specific ranges, and adjusting concentration levels to maximize light diffusion while minimizing color shift
Solution Approach 2:
The patent applies local quality by creating specific zones or distributions of particles with different sizes and refractive indices within the transparent material to achieve uniform light diffusion properties throughout the material while maintaining color accuracy
3Illumination intensity
If scattering particles are added to transparent materials to diffuse light, then light diffusion is improved, but transparency is reduced
Solution Approach 1:
The patent applies parameter changes by optimizing the concentration of scattering particles within specific ranges (e.g., 0.1-10 wt%), controlling particle size distributions, and adjusting refractive index differences to achieve the desired balance between light diffusion and transparency
Solution Approach 2:
The patent applies partial action by using controlled, moderate concentrations of scattering particles rather than high loadings, which provides sufficient light diffusion while maintaining adequate transparency and avoiding excessive particle accumulation that would reduce optical clarity
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 composition ensures consistent light diffusion and reduced color shift, maintaining transparency and luminous intensity across different wavelengths, suitable for lighting applications.
Implementation Method 1
transparent materials comprise scattering particles... all diffuse the light due to the scattering particles
Data Source
AI summary
The present invention relates to a composition comprising scattering particles. In particular the present invention relates to polymeric composition comprising scattering particles for lightning applications or light guides. The invention also relates to a process for manufacturing such a polymeric composition comprising scattering particles for lightning applications or light guides. More particularly the present invention relates to a polymeric (meth)acrylic composition comprising inorganic scattering particles for lightning applications or light guides.