Lighting Panel Noise Reduction Structures
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Solution Overview
Problem
Densely packed lighting systems in indoor and outdoor settings often increase perceived or actual noise due to the lack of noise reduction functionality in modern ceiling tiles, as traditional lighting devices with large reflective surfaces fail to absorb or dissipate sound effectively.
Innovation Solution
Incorporating noise reduction structures such as light guides, diffusers, Helmholtz resonators, and noise damping materials into lighting devices to redirect, diffuse, or absorb sound waves, thereby reducing noise levels in the illuminated area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If lighting devices are densely packed to provide general illumination, then illumination intensity is improved, but noise levels increase due to lack of noise reduction functionality
Solution Approach 1:
The lighting device is designed to perform multiple functions simultaneously: providing general illumination through the light source and panel, while also reducing noise through integrated noise reduction structures (convex curved surfaces, openings, slots, holes, Helmholtz resonators, or Schroeder diffusers) formed on the light output surface of the panel
Solution Approach 2:
The noise reduction structures are merged with the light output surface of the panel, combining the lighting function and noise reduction function into a single integrated component rather than separate elements
2Area of stationary object
If traditional lighting devices with large reflective surfaces are used, then illumination coverage is improved, but noise reflection increases because they lack noise absorption capability
Solution Approach 1:
The light output surface of the panel is given non-uniform local quality through the formation of noise reduction structures (convex curved surfaces, openings, slots, holes, Helmholtz resonators, or Schroeder diffusers) at specific locations, allowing different regions of the same surface to have different acoustic properties while maintaining overall light diffusion
Solution Approach 2:
Convex curved surfaces are formed on the light output surface of the panel as noise reduction structures, using curved geometry to scatter and diffuse sound waves rather than reflecting them in a single direction, thereby reducing noise while maintaining illumination
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 proposed lighting devices achieve noise reduction by incorporating various noise reduction structures, effectively reducing noise levels in the area under illumination, with a noise reduction coefficient (NRC) of at least 0.1 to 0.9 across different frequency ranges, depending on the configuration and size of the structures.
Implementation Method 1
the light guide allowing light to propagate within the light guide and exit via the major surface of the light guide
Implementation Method 2
The noise reduction structure may take the form of an acoustic diffuser, such as a Helmholtz resonator or a Schroeder diffuser
Implementation Method 3
Incorporating noise reduction structures such as light guides, diffusers, Helmholtz resonators, and noise damping materials into lighting devices to redirect, diffuse, or absorb sound waves
Data Source
AI summary
Lighting devices are disclosed. One lighting device includes a housing, a light source, and a panel. The light source is mounted within the housing and configured to emit light sufficient for general illumination of an area. The panel is supported by the housing at a location to receive light from the light source at one or more light input surfaces of the panel and output the received light from the light source via a light output surface of the panel facing the area. The light propagates within material of the panel from the one or more light input surfaces to the light output surface. The light output surface of the panel comprises a noise reduction structure.