Light Guide Body Nanoparticle Scattering Transparency
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Solution Overview
Problem
Conventional light guide bodies suffer from insufficient weathering resistance, cloudiness, and low luminance, especially at angles perpendicular to the light emitting surface, and require complex production processes that compromise transparency and economic viability.
Innovation Solution
Embedding titanium dioxide scattering particles with an average size of 150 to 500 nm in a transparent thermoplastic matrix, allowing for high transparency, uniform light distribution, and increased luminance, while eliminating the need for printing or surface defects, enabling production through simple methods like extrusion or injection molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polymer particles with size of at least 7 micrometers are used as scattering particles, then the light guide body can be produced economically by extrusion or injection molding, but the weathering resistance is insufficient and cloudiness occurs at thickness of 1 mm or more
Solution Approach 1:
The patent changes the particle size parameter from micrometer range (7 micrometers or more) to nanometer range (150-500 nm), which fundamentally alters the optical properties. This parameter change reduces cloudiness and improves weathering resistance while maintaining manufacturability through standard extrusion or injection molding processes
Solution Approach 2:
The patent uses titanium dioxide nanoparticles as scattering particles embedded in a transparent thermoplastic matrix, creating a composite material system. This composite structure combines the scattering properties of TiO2 with the transparency and weathering resistance of the polymer matrix, achieving both optical performance and durability
2Ease of manufacture
If barium sulphate particles with average size of 0.3-20 micrometers are used as scattering particles, then the light guide body can be produced economically, but cloudiness occurs at thickness of 1 mm or more
Solution Approach 1:
The patent changes the particle size parameter from micrometer range (0.3-20 micrometers) to nanometer range (150-500 nm), which fundamentally alters the optical properties. This parameter change reduces cloudiness and improves transparency while maintaining manufacturability through standard extrusion or injection molding processes
Solution Approach 2:
The patent uses titanium dioxide nanoparticles as scattering particles embedded in a transparent thermoplastic matrix, creating a composite material system. This composite structure combines the scattering properties of TiO2 with the transparency of the polymer matrix, achieving both optical performance and economic production
3Ease of manufacture
If scattering particles are embedded in the transparent thermoplastic matrix, then the light guide body can be produced economically by extrusion or injection molding, but low luminance is achieved with observation perpendicular to the light emitting surface
Solution Approach 1:
The patent changes the particle size parameter to nanometer range (150-500 nm) and uses titanium dioxide material, which fundamentally alters the scattering pattern. This parameter change increases luminance in the perpendicular direction while maintaining economic production through standard molding processes
Solution Approach 2:
The patent uses titanium dioxide nanoparticles as scattering particles embedded in a transparent thermoplastic matrix, creating a composite material system. This composite structure combines the high scattering efficiency of TiO2 nanoparticles with the transparency of the polymer matrix, achieving both high luminance and economic production
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 use of titanium dioxide particles with specific size ranges enhances transparency and luminance, reducing cloudiness and enabling versatile configurations, including freeform designs, while maintaining economic production and improved optical properties.
Implementation Method 1
Light guide bodies which are based on the principle of embedding scattering particles in a transparent thermoplastic matrix are known
Data Source
AI summary
The present invention relates to light guide bodies having improved luminous intensity and transparency, to a method for their production and to their use.