Monocrystal Phosphor Element with Scattering Centers
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Solution Overview
Problem
Phosphor elements used in light emitting diodes (LEDs) face challenges with low thermal conductivity and inefficient conversion radiation coupling at elevated temperatures, leading to reduced quantum efficiency and luminance.
Innovation Solution
A monocrystal phosphor element with incorporated scattering centers, which acts as a volume scatterer, improving thermal conductivity and radiation coupling by scattering conversion radiation to enhance efficiency and luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If phosphor particles are embedded in matrix material to form phosphor element, then phosphor element can be produced with customary particle diameter, but thermal conductivity is low and thermal properties are disadvantageous
Solution Approach 1:
The patent creates a composite structure by embedding phosphor particles into a matrix material, forming a phosphor element with combined properties. The matrix material provides structural support and thermal conduction pathways, while the phosphor particles maintain their luminescent function, thus improving overall thermal conductivity while preserving ease of manufacture through established composite fabrication techniques.
2Duration of action of stationary object
If conventional phosphor element is used at elevated temperatures, then device can operate, but quantum efficiency decreases and luminance is reduced
Solution Approach 1:
The patent modifies the physical and chemical parameters of the phosphor element by selecting specific phosphor materials with high thermal stability and optimizing their concentration within the matrix. This parameter optimization allows the phosphor element to maintain high quantum efficiency and luminance even at elevated operating temperatures, thereby reducing energy loss while ensuring operational stability.
3Reliability
If monocrystal phosphor element with scattering centers is used, then thermal conductivity and radiation coupling are improved, but device complexity increases
Solution Approach 1:
The patent introduces scattering centers at specific locations within the monocrystal phosphor element where they are most effective for radiation coupling. Rather than uniformly complicating the entire structure, the scattering centers are strategically positioned to enhance thermal conductivity and radiation coupling only in critical regions, thus improving reliability while minimizing overall 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
The monocrystal phosphor element maintains high quantum efficiency at elevated temperatures and improves thermal dissipation, increasing the usable conversion radiation and overall luminance.
Implementation Method 1
a monocrystal composed of a phosphor element material for converting a pump radiation into a conversion radiation
Implementation Method 2
The monocrystal is formed with a multiplicity of scattering centers incorporated into the monocrystal, that is to say is formed as a volume scatterer. The scattering centers for scattering the conversion radiation are incorporated into the monocrystal.
Implementation Method 3
The phosphor element maintains high quantum efficiency at elevated temperatures and improves thermal dissipation
Data Source
AI summary
In various embodiments, a phosphor element is provided. The phosphor element includes a monocrystal composed of a phosphor element material for at least partly converting a pump radiation into a conversion radiation. The monocrystal is formed with a multiplicity of scattering centers incorporated into the monocrystal—Apart from that, however, the phosphor element material in the monocrystal is present in a monocrystalline fashion. The scattering centers for scattering the conversion radiation are incorporated into the monocrystal.