Spectrum-Shifting Material Peripheral Placement for Thermal Management
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Solution Overview
Problem
Conventional light emitting assemblies face issues with heat buildup and bulky heat dissipation structures due to the placement of spectrum-shifting materials, which can lead to inefficient light spectrum shifting and thermal management.
Innovation Solution
A light emitting assembly design where the spectrum-shifting material, such as phosphor, is circumferentially positioned around the light source and in contact with a thermally conductive housing and heat sink, allowing for effective heat dissipation and directing light emitted along an axis orthogonal to the plane, utilizing a lens or reflector to manage light emission and a thermal interface to reduce thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the spectrum-shifting material is placed in the conventional position (through which light passes before leaving the assembly), then the light spectrum can be shifted, but heat buildup occurs in the material requiring bulky heat dissipation structures
Solution Approach 1:
The spectrum-shifting material is extracted from its conventional position and relocated to the periphery of the light source, where it contacts the heat dissipation structure directly. This extraction allows the material to be positioned optimally for both spectrum shifting and heat dissipation, eliminating the need for bulky separate heat dissipation structures.
Solution Approach 2:
The heat dissipation structure is given dual functionality: it serves as both the thermal management component and the mounting structure for the spectrum-shifting material. By integrating these functions, the design eliminates the need for separate bulky heat dissipation structures while maintaining effective thermal management.
2Use of energy by moving object
If the light source emits light generally about a plane, then the light can be directed efficiently, but the spectrum-shifting material must be positioned to receive this planar light emission
Solution Approach 1:
The spectrum-shifting material is positioned in a different spatial dimension relative to the light source - at the periphery rather than in the path of planar light emission. This dimensional repositioning allows the material to receive light from the planar-emitting source while maintaining efficient light direction, without requiring complex positioning structures.
3Productivity
If the spectrum-shifting material is positioned to maximize light interaction, then spectrum shifting is effective, but thermal management becomes difficult without additional structures
Solution Approach 1:
The spectrum-shifting material is merged with the heat dissipation structure through direct contact. This merging allows the material to be positioned for maximum light interaction while simultaneously providing an efficient thermal management pathway, achieving both high spectrum shifting efficiency and effective heat dissipation without additional structures.
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 enables efficient spectrum shifting and heat management, reducing heat buildup in the spectrum-shifting material while effectively directing light along the desired axis, improving thermal dissipation and light emission characteristics.
Implementation Method 1
a material configured to shift light incident from the light source from a first spectral profile to a second spectral profile and emit light as shifted
Implementation Method 2
the material is in contact with a thermally conductive housing and heat sink, allowing for effective heat dissipation
Implementation Method 3
a lens configured to direct the light as emitted by the light emitter substantially about the plane
Implementation Method 4
a lens configured to direct the light as emitted by the light emitter substantially about the plane
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A light emitting assembly and method for making optionally includes a light source configured to emit light substantially about a plane, the light having a first spectral profile, and a material configured to shift light incident from the light source from the first spectral profile to a second spectral profile and emit light as shifted. The light, as shifted, is emitted from the assembly generally along an axis orthogonal to the plane.