Light Pipe With Surface-Treated Supporter For Uniform Illuminance
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Solution Overview
Problem
Illuminating devices using light pipes often experience non-uniform brightness along their longitudinal direction due to varying illuminance levels, which are affected by distance from the light source, leading to inadequate light distribution.
Innovation Solution
A light pipe with a surface-treated supporter featuring protrusions or indentations, which induces scattered reflection and scattering, ensuring uniform light emission across the entire length by adjusting the surface roughness of the supporter from 3 μm to 30 μm, thereby maintaining optimal optical transmittance and illuminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If light is transmitted through a light pipe to a remote place, then light distribution to distant areas is improved, but illuminance levels become non-uniform along the longitudinal direction
Solution Approach 1:
The supporter is designed with different surface roughness values at different locations along the longitudinal direction of the light pipe. The surface roughness increases from 3-10 μm near the light source to 20-30 μm at distant locations, creating local variations in light scattering properties that compensate for the natural decrease in illuminance with distance
Solution Approach 2:
The surface roughness parameter of the supporter is systematically varied along the longitudinal direction to control light scattering. By changing the surface roughness from 3-10 μm near the source to 20-30 μm at distant points, the light distribution characteristics are optimized to achieve uniform illuminance across the entire light pipe length
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 uniform light emission and maintains high optical transmittance across the light pipe, reducing the difference in illuminance levels between the source and distant areas, resulting in consistent brightness and effective light distribution.
Implementation Method 1
A light pipe with a surface-treated supporter featuring protrusions or indentations, which induces scattered reflection and scattering
Implementation Method 2
A light pipe with a surface-treated supporter featuring protrusions or indentations, which induces scattered reflection and scattering
Data Source
AI summary
A light pipe and an illuminating device having the light pipe are provided. The light pipe may include an optical film in a rolled shape to have a hollow conduit and a supporter surrounding a surface of the optical film. The supporter may have at least one of a protrusion and an indentation on a surface of the supporter.