Integrated Louvres for Beam Control in LED Lighting
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Solution Overview
Problem
Existing lighting fixtures, particularly those using LEDs, struggle to control light distribution effectively, leading to spill light and glare in outdoor spaces like sports fields and arenas, as they lack the ability to modify beam patterns to avoid undesired areas, resulting in wasteful and potentially hazardous lighting.
Innovation Solution
An optical structure comprising primary and secondary optics, where the secondary optics can be adjusted to block light from illuminating regions outside the target area, using a parabolic reflector and a visor or arc-shaped visor attached to the primary optics, allowing for customizable light distribution by varying the orientation and properties of the secondary optics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If existing reflectors and optical components are used to light large areas, then the target area can be illuminated, but spill light and glare occur in undesired areas
Solution Approach 1:
The patent divides the optical control system into multiple independent segments: primary optics for main beam direction, secondary optics for beam pattern modification, and adjustable louvres for precise angular control. Each segment can be independently optimized and adjusted to achieve the desired light distribution without affecting the others.
Solution Approach 2:
The patent introduces dynamically adjustable optical components, particularly the louvres that can change their orientation and position to modify beam spread and direction in real-time. This allows the lighting system to adapt to different operational requirements and eliminate spill light and glare by adjusting the optical configuration.
2Illumination intensity
If uniform beam spread is provided by existing reflectors, then the entire periphery is illuminated, but there is no ability to avoid lighting undesired areas
Solution Approach 1:
The patent transforms the static uniform beam spread into a dynamic, configurable beam pattern through adjustable secondary optics and louvres. These components can be positioned and oriented to create customized beam patterns that concentrate light on desired areas while avoiding undesired regions, providing versatility in lighting configuration.
Solution Approach 2:
The patent applies different optical properties to different parts of the lighting system. The primary optics provide the main illumination, while the secondary optics and adjustable louvres modify specific regions of the beam pattern locally, allowing certain areas to be enhanced or blocked as needed, thus achieving non-uniform but optimized light distribution.
3Illumination intensity
If multiple small light sources with individual optics are used, then each creates a particular beam pattern, but controlling the beam direction of each source increases complexity
Solution Approach 1:
The patent combines multiple optical control functions into a unified system. Instead of independently controlling each LED module's optics, the invention uses a common set of adjustable secondary optics and louvres that collectively control the beam patterns of all light sources, significantly reducing the overall system complexity while maintaining precise beam control.
Solution Approach 2:
The patent designs universal optical components (secondary optics and louvres) that can control multiple light sources simultaneously. These components serve multiple functions: directing beams from different LED modules, modifying beam patterns, and eliminating spill light across the entire array, rather than requiring dedicated control mechanisms for each individual source.
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 solution enables precise control over light distribution, reducing spill light and glare, allowing for more efficient and targeted lighting that meets the requirements of large outdoor areas while minimizing light in undesired regions.
Implementation Method 1
a primary optics disposed relative to the light source and configured to reflect light generated by the light source towards a target region. The primary optics may include a parabolic shaped reflector
Implementation Method 2
a secondary optics disposed and aligned relative to the primary optics. The secondary optics may be configured to at least partially block light generated by the light source from illuminating a region outside the target region
Data Source
AI summary
An optical structure for controlling distribution of light generated by a light source is described. The optical structure includes a primary optics disposed relative to the light source and configured to reflect light generated by the light source towards a target region. The optical structure also includes a secondary optics disposed and aligned relative to the primary optics. The secondary optics is configured to at least partially block light generated by the light source from illuminating a region outside the target region.