LED Reflector Shell Elements for Uniform Light Distribution
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Solution Overview
Problem
LED-based illumination devices face issues with poor color quality and spatial/angular variations in color rendering due to limitations in emission patterns.
Innovation Solution
An optical element with a hollow shell reflector and multiple annular shell elements within, where the radius and height of each annular shell element vary, is used to improve light distribution and emission patterns by increasing the perimeter size from the input to the output port, enhancing light collimation and beam angle control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LEDs are combined to improve color quality and rendering, then color quality and rendering are improved, but spatial and angular variations in color occur
Solution Approach 1:
The illumination device is divided into multiple LED modules, each with its own optical element. This segmentation allows independent optimization of each module's light emission, reducing spatial and angular variations in color while maintaining overall color quality improvement.
Solution Approach 2:
Each optical element is specifically designed with tailored shell elements to control the light emission pattern of its associated LED module. This local optimization ensures uniform color output from each module, addressing spatial and angular variations while preserving the benefits of multiple LEDs.
2Manufacturing precision
If a hollow shell reflector with multiple annular shell elements is used to improve light distribution and collimation, then beam angle control is improved, but device complexity increases
Solution Approach 1:
Multiple annular shell elements are nested within the hollow shell reflector, with each element positioned at different distances from the input port. This nested configuration achieves precise beam angle control through multiple reflective surfaces while maintaining a compact overall structure.
Solution Approach 2:
The optical element utilizes three-dimensional spatial arrangement of annular shell elements with varying radii and heights. This dimensional approach enables precise control of light distribution and beam angle by manipulating light paths in multiple spatial dimensions rather than relying on complex two-dimensional surface profiles.
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 solution achieves a more uniform and improved light distribution with a narrower beam angle, addressing the limitations in color quality and rendering of LED-based illumination devices.
Implementation Method 1
hollow shell reflector and a plurality of annular shell elements disposed within the hollow shell reflector
Data Source
AI summary
An optical element that may be replaceably mounted to an LED based illumination device. The optical element includes a hollow shell reflector and a plurality of annular shell elements disposed within the hollow shell reflector at different distances from the input port of the optical element. An annular shell element that is closer to the input port of the optical element has a radius that is less than the radius of an annular shell element farther from the input port.