Multi-Refractive LED Package for Light Extraction and Moisture Resistance
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Solution Overview
Problem
Light emitting devices face challenges in achieving high luminous efficacy, reducing defects, and improving structural stability and moisture resistance due to limitations in light extraction efficiency and beam angle distribution.
Innovation Solution
A light emitting apparatus featuring a multi-refractive layer with a first refractive layer and a second refractive layer of different indices, where the second refractive layer has a greater radius of curvature and covers the light emitting source, enhancing light extraction and directing light effectively while providing structural stability and moisture protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single lens is used to distribute light, then the structure is simple, but light extraction efficiency is insufficient and beam angle distribution is limited
Solution Approach 1:
The patent divides the single lens into multiple refractive layers with different indices of refraction (first refractive layer, second refractive layer, and third refractive layer). Each layer has specific curvature radii (R1, R2, R3) that work together to improve light extraction efficiency while maintaining a manageable structure. This segmentation allows better control over light distribution without excessive complexity.
2Volume of moving object
If the light emitting device is disposed below the lens, then the structure is compact, but light loss occurs below the lens
Solution Approach 1:
The patent extends the light management solution from a single-plane lens to a multi-dimensional layered structure. The first, second, and third refractive layers are arranged in sequence with different curvatures, creating a three-dimensional light control system that captures and redirects light from multiple angles, preventing light loss while maintaining compact packaging.
3Productivity
If a multi-layer refractive structure is added to improve light extraction, then luminous efficacy increases, but device complexity increases
Solution Approach 1:
The patent optimizes luminous efficacy by carefully selecting and controlling specific parameters of the refractive layers: indices of refraction (n1, n2, n3), curvature radii (R1, R2, R3), and layer thicknesses. By adjusting these parameters within optimized ranges, high light extraction efficiency is achieved without requiring an excessive number of layers, thus balancing performance with manufacturing complexity.
4Illumination intensity
If the beam angle is narrowed to increase intensity, then light concentration improves, but light distribution area is reduced
Solution Approach 1:
The patent creates a dynamic light distribution system where the multi-layer refractive structure adapts light paths based on incident angles. The different curvature radii (R1 > R2 > R3) of the three layers work together to concentrate light in certain directions while simultaneously distributing it to other areas, achieving both high intensity regions and broad coverage without requiring separate optical systems.
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 increases light output, improves structural stability, and delays moisture permeation, resulting in enhanced reliability and luminous efficacy by optimizing light extraction and beam angle distribution.
Implementation Method 1
a multi-refractive layer refracting light emitted from the light emitting source, wherein the multi-refractive layer includes a first refractive layer and a second refractive layer disposed outside the first refractive layer
Data Source
AI summary
A light emitting apparatus includes a base substrate, at least a light emitting source disposed on the base substrate, and a multi-refractive layer refracting light emitted from the light emitting source, where the multi-refractive layer includes a first refractive layer and a second refractive layer disposed outside the first refractive layer, the first refractive layer having a lower index of refraction than the second refractive layer.