LED Modules with Asymmetric Reflective Strip for Outdoor Lighting
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Solution Overview
Problem
Existing outdoor lighting solutions, such as street and path lights, face limitations in generating desired light distributions due to the symmetrical light emission of side-emitting LEDs, which restricts the ability to create asymmetrical light distribution curves required for effective illumination.
Innovation Solution
The use of LED modules with integrated optics producing two maxima in light intensity distribution, combined with a laterally arranged reflective strip, allows for asymmetrical reshaping of light emission characteristics, enabling a variety of desired light distributions without complex reflector structures. The reflective strip is angled relative to the LED matrix, deflecting light maxima laterally, and the LEDs can be arranged freely to achieve the desired asymmetrical overall light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If side-emitting LEDs with integrated optics are used, then the light distribution is symmetrical and easy to manufacture, but the ability to generate asymmetrical light distribution curves is limited
Solution Approach 1:
The patent applies asymmetry by introducing a reflector strip positioned asymmetrically relative to the LED matrix. The reflector strip is offset from the central axis of the LED array, causing light to be reflected preferentially in one direction. This asymmetric positioning transforms the inherently symmetrical emission pattern of side-emitting LEDs into an asymmetrical light distribution, enabling versatile lighting applications without requiring complex LED geometries or multiple LED orientations.
2Adaptability or versatility
If complex reflector structures are used on LED modules, then desired light distributions can be achieved, but the device complexity increases
Solution Approach 1:
The patent segments the reflector function into a simple, separate component - a single reflector strip positioned laterally adjacent to the LED matrix. Rather than requiring complex integrated reflector structures on each LED module, the solution divides the light distribution function into: (1) the LED matrix providing symmetrical emission, and (2) the simple reflector strip providing asymmetrical redirection. This segmentation achieves versatile light distributions while maintaining structural simplicity.
Solution Approach 2:
The reflector strip acts as an intermediary element between the symmetrical LED emission and the desired asymmetrical light distribution. Instead of modifying the LEDs themselves or using complex integrated reflectors, the patent introduces this intermediate reflective component that transforms the light pattern. The reflector strip mediates the transformation from symmetrical to asymmetrical distribution, simplifying the overall device architecture.
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 approach allows for the generation of a wide range of suitable light distributions, including asymmetrical and uniform patterns, enhancing the illumination capabilities of outdoor lights while maintaining a simple module design, avoiding the need for intricate reflector structures.
Implementation Method 1
the light radiation of the LED being reflected in one of the two maxima by the reflective strip
Data Source
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AI summary
The invention relates to a light, in particular an outdoor light, having a light source mount surface, on which a plurality of LED modules are arranged, wherein the LED modules each have a matrix of a plurality of LEDs, which are arranged on a plane, and a reflector strip, which is adjacent to one edge of the plane and is angled with respect to the plane, wherein the LEDs each have integrated optics, which produce two maxima of the light intensity distribution from the respective individual LED on a cross section through the LEDs at right angles to the plane, which are deflected laterally with respect to the surface normal to the plane through the LEDs, wherein the light radiation from the LEDs at one of the two maxima is reflected by the reflector strip.