Louver Assembly Glare Reduction Light Efficiency
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Solution Overview
Problem
Conventional louvers in overhead lighting systems are costly to install and may not effectively reduce glare, as they often block light, impacting efficiency and aesthetics, especially in commercial and institutional settings.
Innovation Solution
A louver assembly comprising perpendicular blade ribs and stringers, interconnected to form a series of square or rectangular openings, which focuses light downward and is designed for easy and secure installation, using lightweight metal materials for enhanced structural rigidity and optical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional louvers with parabolic blade side walls are used to reflect light downward, then glare is reduced, but light fixture efficiency is negatively impacted due to light being blocked and reflected back into the fixture
Solution Approach 1:
The louver blade is divided into distinct functional zones: an upper reflective surface for directing light downward and a lower blocking surface for preventing light escape. This segmentation allows each surface to perform its specific function optimally without the drawbacks of conventional parabolic designs.
Solution Approach 2:
Different surfaces of the louver blade are given different geometric properties - the upper surface has a reflective angle optimized for downward light direction, while the lower surface has a blocking geometry optimized for preventing light escape. This local differentiation resolves the contradiction between glare reduction and efficiency.
2Object-affected harmful factors
If coffers with deeper dimensions are used to house light fixture housings, then glare is effectively reduced by blocking low angle light rays, but installation cost increases and installation becomes more complex
Solution Approach 1:
The glare reduction function is extracted from the ceiling structure (coffer) and transferred to the louver assembly itself. This allows glare reduction to be achieved at the light fixture level without requiring deep ceiling recesses, simplifying installation while maintaining effectiveness.
Solution Approach 2:
Instead of solving glare by changing the vertical dimension (deeper coffer dimensions), the invention addresses it through the louver blade geometry in the horizontal plane, using angled and blocked surfaces to redirect light without requiring increased depth.
3Shape
If transparent or translucent lenses are used to cover the open face of the light fixture housing, then the fixture appears aesthetically pleasing, but low angle light rays escape and create glare
Solution Approach 1:
The louver assembly acts as an intermediary element positioned between the light source and the surrounding environment. It mediates the light output by selectively directing light downward while blocking low angle rays, thus preventing glare without compromising the aesthetic appearance provided by the lens.
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 louver assembly effectively reduces glare while maintaining high energy efficiency and aesthetic appeal, offering rapid installation and cost-effective manufacturing, with improved structural integrity and optical performance compared to traditional designs.
Implementation Method 1
the blades of most louvers are typically designed with parabolic side wall surfaces that are shaped to reflect the light emitted from the lamps downward in an effort to minimize the escape of the low angle light rays that produces glare
Data Source
AI summary
A louver assembly is disclosed for use in an overhead lighting system. The louver assembly comprises a series of thin, lightweight stringers and blade ribs arranged perpendicular to one another such that the respective side surfaces of the respective stringers are positioned at an acute angle with respect to a ceiling plane and the reflective faces of the blade ribs are positioned substantially transverse with respect to the ceiling plane.