Adjustable Reflector Elements for Road Lighting Distribution
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Solution Overview
Problem
Existing street and road lighting luminaires face challenges in efficiently adapting light distribution characteristics without complex rearrangements or additional optical elements, limiting their flexibility and efficiency.
Innovation Solution
A lighting unit with a reflector unit comprising parallel reflector elements, where some elements have a portion for total reflection and another for partial reflection, allowing for efficient control of light distribution by adjusting the angles and positions of these elements to achieve desired lateral asymmetry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional reflector systems are used with single lamp or fixed LED arrangements, then the luminaire structure is simple, but the light distribution cannot be easily adapted to different street configurations
Solution Approach 1:
The reflector is divided into multiple independent reflector elements (first reflector element, second reflector element, etc.) that can be individually adjusted. Each element has its own support structure allowing independent positioning, enabling flexible light distribution adaptation without changing the overall system structure.
Solution Approach 2:
The reflector elements are made adjustable rather than fixed, with support structures that allow changing the position and orientation of each element. This dynamic capability enables the same luminaire to adapt to different street widths and lighting requirements by repositioning the reflector elements.
2Adaptability or versatility
If multiple different optical elements are added to change light distribution, then the light distribution can be significantly changed, but the device complexity increases
Solution Approach 1:
The adjustable reflector elements serve multiple functions: they can be positioned to create different light distribution patterns (asymmetric for road lighting, symmetric for area lighting), adjust beam width, and adapt to various mounting positions. This single adjustable component replaces what would otherwise require multiple different optical elements.
Solution Approach 2:
The system achieves different light distributions by changing the positional parameters of the reflector elements rather than changing the optical elements themselves. By adjusting the angle and position of existing reflector elements, various light patterns are obtained without adding new components.
3Adaptability or versatility
If light sources are rearranged to achieve different light distributions, then the light distribution characteristic changes significantly, but the installation and maintenance complexity increases
Solution Approach 1:
The separation of light sources from the reflector adjustment mechanism allows the light sources to remain fixed while only the reflector elements are repositioned. This segmentation means that during installation and maintenance, only the reflector elements need to be adjusted, not the entire light source assembly, simplifying operations.
4Adaptability or versatility
If the luminaire is designed for high efficiency with fixed optical configuration, then the utilization factor is maximized, but the ability to adapt to different street widths and configurations is limited
Solution Approach 1:
The adjustable reflector elements allow the optical configuration to be dynamically optimized for different street configurations. Whether for narrow streets requiring asymmetric distribution or wide areas requiring symmetric distribution, the reflector elements can be positioned to maximize light utilization efficiency for each specific application.
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
Enables easy and efficient adaptation of light distribution to match various street and road configurations, reducing the need for rearranging light sources or using additional optical elements, while maintaining a compact design and high efficiency.
Implementation Method 1
at least some of the reflector elements comprise a first portion adapted for total reflection
Implementation Method 2
a second portion being adapted for partial reflection
Data Source
AI summary
A lighting unit for use in a luminaire, in particular a luminaire for road and/or street lighting, comprising a plurality of light sources and a reflector unit arranged in front of the light sources to control the distribution of the light emitted by said light sources, wherein he reflector unit comprises a plurality of reflector elements arranged parallel to each other, with at least some of the reflector elements comprising a first portion adapted for total reflection and a second portion adapted for partial reflection.