Light emitting device and apparatus using the same
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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 multiple refractive layers of varying indices and curvatures, which refracts light emitted from the source, increasing extraction efficiency and directing it effectively while also providing structural stability and moisture protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single lens is used to distribute light, then light distribution is achieved, but light extraction efficiency is insufficient and beam angle is limited
Solution Approach 1:
The patent divides the lens into multiple lens layers (first lens layer and second lens layer) with different refractive indices. Each layer independently refracts light, increasing overall light extraction efficiency while maintaining manageable structural complexity through modular design
Solution Approach 2:
The patent uses composite lens structure with materials of different refractive indices arranged in layers. This composite approach enables each layer to contribute differently to light refraction, maximizing light extraction efficiency while the systematic arrangement controls structural complexity
2Productivity
If the light emitting device is disposed below the lens, then structural compactness is achieved, but light loss occurs as light fails to enter the lens
Solution Approach 1:
The patent extends the lens structure laterally beyond the light emitting device boundaries. This dimensional extension ensures light emitted in all directions can enter the lens, capturing light that would otherwise be lost while maintaining the compact vertical arrangement
Solution Approach 2:
The patent divides the lens into multiple layers that collectively cover the light emitting device. This segmentation allows each layer to capture light from different angular ranges, ensuring comprehensive light collection while reducing overall light loss
3Productivity
If a multi-refractive layer structure is implemented, then light extraction efficiency increases, but structural complexity increases
Solution Approach 1:
The patent segments the lens into multiple functional layers with distinct refractive indices, where each layer contributes to light refraction. This segmentation increases light extraction efficiency while the modular layered structure keeps complexity manageable through systematic organization
Solution Approach 2:
The multi-layer lens structure serves multiple functions simultaneously: each layer refracts light at different rates, collectively achieving broad-spectrum light extraction enhancement. This multi-functionality justifies the increased structural complexity by delivering superior light extraction performance
4Reliability
If conventional lens structures are used, then manufacturing simplicity is maintained, but moisture protection is insufficient
Solution Approach 1:
The patent divides the lens into multiple sealed layers, creating a multi-barrier structure against moisture penetration. Each layer acts as a protective barrier, and the layered configuration increases the moisture permeation path length, enhancing moisture resistance while maintaining manageable structural complexity
Solution Approach 2:
The patent employs composite lens structure with multiple materials having different moisture barrier properties. This composite approach enhances overall moisture resistance by combining materials with complementary protective characteristics while the systematic arrangement controls structural complexity
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 enhances light output, structural stability, and reliability by optimizing light extraction and beam angle distribution, while delaying moisture permeation through the multi-refractive layer's design.
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
Figure 1(a)~1(b)
Figure 2~3
Figure 4~5(d)
AI summary
A light emitting apparatus is disclosed. The 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, wherein 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.