Multi-Layer Fluorescent LED Device for Color Rendering
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Solution Overview
Problem
Current LED devices face challenges in optimizing heat efficiency, color rendering index, and light distribution, with existing designs not fully addressing the need for improved performance and reliability in converting original light spectra into desired output spectra.
Innovation Solution
The LED device incorporates multiple fluorescent layers with specific phosphor materials and packaging structures, including convex and concave surfaces, to convert original light into optimized output spectra, with the first fluorescent layer between the second fluorescent layer and the LED module to enhance green light output and reduce energy consumption, and the use of package housing with reflecting walls to direct light effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple fluorescent layers are used to convert original light to desired spectra, then color rendering index and light efficacy are improved, but device complexity increases
Solution Approach 1:
The patent divides the light conversion function into multiple fluorescent layers, each containing specific phosphor materials that convert different portions of the original light spectrum. The first fluorescent layer converts blue light to green light, while the second fluorescent layer converts blue light to yellow light, achieving comprehensive spectrum optimization through functional segmentation.
Solution Approach 2:
The patent implements a nested structure where the first fluorescent layer is positioned between the second fluorescent layer and the LED module. This nested arrangement allows both fluorescent layers to work simultaneously on the same light path, with the first layer processing light that has already passed through the second layer, thereby optimizing space utilization and light conversion efficiency.
2Use of energy by moving object
If fluorescent layers are arranged to optimize light conversion, then heat efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by positioning the first fluorescent layer specifically between the second fluorescent layer and the LED module, rather than uniformly distributing all fluorescent materials. This localized arrangement optimizes heat efficiency by placing heat-converting materials closer to the light source where thermal management is most critical, while the second layer handles broader spectrum conversion.
Solution Approach 2:
The patent transitions from a single-layer to a multi-layer dimensional structure, arranging fluorescent layers in the vertical dimension between the LED module and the external environment. This dimensional change allows for optimized light path management and heat dissipation pathways without significantly increasing lateral manufacturing complexity.
3Ease of operation
If package housing with reflecting walls is used to direct light, then light distribution is optimized, but device complexity increases
Solution Approach 1:
The package housing is designed to perform multiple functions simultaneously: it provides structural support for mounting the LED module and fluorescent layers, acts as a thermal management component through its heat dissipation structure, and functions as an optical element with reflecting walls that direct and distribute light. This multi-functionality reduces the need for separate components, thereby optimizing light distribution without proportionally increasing device 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
This design improves light efficacy, enhances the color rendering index, and optimizes light distribution by effectively converting original light into desired spectra, achieving better heat dissipation and product stability, while minimizing energy waste and improving the overall output spectrum to produce a white light effect.
Implementation Method 1
The first fluorescent layer has a first side facing to the LED module for converting the blue light to a green light
Implementation Method 2
The second fluorescent layer has a first side attached to a second side of the first fluorescent layer for converting the blue light to a red light emitted from a second side of the second fluorescent layer
Implementation Method 3
the package housing has more than two containers for placing the first fluorescent layers and the second fluorescent layer arranged in interleaved manner
Data Source
AI summary
A LED device includes LED chips mounted on a substrate, a first fluorescent layer, a second fluorescent layer and a package housing. The LED chips emit a blue light. The first fluorescent layer has a first side facing to the LED chips for converting the blue light to a red light. The second fluorescent layer has a first side attached to a second side of the first fluorescent layer for converting the blue light to a red light emitted from a second side of the second fluorescent layer. The package housing holds the substrate and the first fluorescent layer.