Asymmetrical Louvre Reflector Cells for Side-Coffer Illumination
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Solution Overview
Problem
Existing louvre cell luminaires with LED light sources are very directional in light distribution, leading to dark/unlit areas on one side and requiring additional light sources or reducing the overall height, which compromises control over direct light emission and aesthetics.
Innovation Solution
The design of asymmetrical reflector cells with inclined light entry openings in the louvre allows controlled spillage of light into side coffers, minimizing light waste and enhancing light distribution control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the overall height of the louvre is reduced to illuminate side coffers, then the side areas are illuminated, but the control over direct light emission is compromised
Solution Approach 1:
The patent applies asymmetry by providing reflector cells with different heights: first reflector cells have a first height for direct light control, while second reflector cells have a second height (lower than the first) to illuminate side coffers. This asymmetric configuration allows simultaneous achievement of direct light control and side area illumination without compromising either function.
2Illumination intensity
If additional LEDs/PCBs are added to illuminate side coffers, then the side areas are illuminated, but the device complexity increases
Solution Approach 1:
The patent makes the existing light source and reflector cell structure multi-functional. The reflector cells serve dual purposes: controlling direct light emission through their reflective surfaces and illuminating side coffers through controlled light leakage at their top edges. This eliminates the need for additional dedicated light sources for side illumination, reducing device complexity while maintaining illumination functionality.
3Illumination intensity
If conventional techniques are used to allow light leakage into side coffers by adjusting PCB spacing, then side areas are illuminated, but light waste occurs
Solution Approach 1:
The patent applies local quality by differentiating the functional properties of different reflector cells. First reflector cells have optimized reflective surfaces for direct light control, while second reflector cells have specific geometric configurations (lower height, inclined tops) that enable controlled light leakage into side coffers. This localized functional differentiation ensures that light is directed where needed rather than wasted, improving overall light utilization efficiency.
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
Achieves efficient and aesthetically pleasing lighting by uniformly illuminating side coffers without additional light sources, optimizing light usage and reducing structural complexity.
Implementation Method 1
each of which forming a ring-like closed wall with a reflective surface which extends from a light entry opening of the associated reflector cell to a light exit opening of the reflector cell
Data Source
Figure 1~2
Figure 3
Figure 4a~6c
AI summary
An optical element (30) for influencing the light of a light source (15) forms a louvre which is formed by a grid-like arrangement of several reflector cells (31), each of which forming a ring-like closed wall (32) with a reflective surface which extends from a light entry opening (33) of the associated reflector cell (31) to a light exit opening (34) of the reflector cell (31), wherein the light exit openings (34) of all the reflector cells (31) are substantially in a common first plane (I) and wherein the light entry opening (33) of at least one of the reflector cells (31) defines a second plane (II) which is inclined relative to the first plane (I) of the light exit openings (34).