Multilayer Stair-Structure Optical Micro-Structures for Glare Reduction
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Solution Overview
Problem
LED-based road illumination systems often cause severe glare due to excessive light concentration, leading to uncomfortable conditions for pedestrians and drivers, and the use of matte lampshades results in energy waste and insufficient road illumination.
Innovation Solution
The illumination apparatus incorporates a reflective shell, a front cover, and optical micro-structures featuring multilayer stair-structures or stacked layers with misaligned side surfaces, which diffuse light beams through refraction and reflection, reducing glare and ensuring adequate illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If matte lampshades are used to suppress glare, then glare is reduced, but light energy is wasted and illumination intensity on road surface is insufficient
Solution Approach 1:
The lampshade is divided into multiple reflective segments arranged in a specific geometric pattern, each segment reflecting light in a controlled direction toward the road surface, preventing random dispersion while maintaining directional illumination
Solution Approach 2:
A reflective structure acts as an intermediary between the light source and the road surface, redirecting light through controlled reflection to achieve both glare suppression and sufficient illumination intensity on the road
2Loss of energy
If light-emitting diodes emit light directionally to improve efficiency, then energy waste is reduced, but severe glare is caused
Solution Approach 1:
Different regions of the lampshade structure are designed with specific reflective properties to control light distribution locally, directing light downward toward the road while preventing upward or lateral glare, thus maintaining energy efficiency with directional control
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
This design effectively suppresses glare while achieving the required illumination effect, enhancing comfort and compliance with road regulations by increasing the light-emitting source area and distributing light intensity uniformly.
Implementation Method 1
The optical micro-structures diffuse the light beam by refraction and reflection
Implementation Method 2
The optical micro-structures diffuse the light beam by refraction and reflection
Data Source
AI summary
An illumination apparatus includes a reflective shell, a front cover, a light-emitting device, and a plurality of optical micro-structures. The front cover is connected to the reflective shell. A containing space is formed between the reflective shell and the front cover. The light-emitting device is disposed in the containing space and is configured to emit a light beam. The optical micro-structures are disposed on at least one of the reflective shell and the front cover. Each of the optical micro-structures is a multilayer stair-structure. The optical micro-structures diffuse the light beam by refraction and reflection.