LED with Magnetic Field and Thermal Layer
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Solution Overview
Problem
Conventional light emitting diodes (LEDs) suffer from non-uniform current density distribution and light blocking due to non-transparent top electrodes, leading to reduced light output and heat-related performance issues.
Innovation Solution
A light emitting device incorporating a magnetic field generated by a magnetic layer, combined with a thermal conductive material layer for heat dissipation, which adjusts current density and enhances light uniformity and efficiency by applying a perpendicular magnetic field to the active layer, and integrates heat dissipation to manage thermal effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a non-transparent top electrode is positioned at the center region of the light emitting area, then the current density under the top electrode is larger and more light is emitted, but the emitted light is blocked resulting in reduction of output light
Solution Approach 1:
The patent extracts the top electrode from the center region and repositions it to the periphery of the light emitting area. This removal of the blocking element from the central light path eliminates the light blocking problem while maintaining electrical connection functionality through peripheral positioning
Solution Approach 2:
The patent transitions from a planar electrode arrangement to a three-dimensional magnetic field configuration by applying a perpendicular magnetic field. This dimensional change allows current density modulation without requiring a central blocking electrode, resolving the contradiction between current concentration and light output
2Power
If current density is not uniformly distributed to the whole light emitting area, then the light uniformity is reduced
Solution Approach 1:
The patent changes the physical parameter of current distribution by applying a perpendicular magnetic field. This magnetic field modifies the electron transport characteristics through the active layer, transforming the current density distribution from non-uniform to uniform across the light emitting area, thereby improving light uniformity
3Power
If the LED generates heat when in operation, then the performance and lifetime are affected
Solution Approach 1:
The patent introduces a thermal conductive material layer as an intermediary between the light emitting device and the heat dissipation structure. This intermediary layer efficiently transfers heat away from the active region, managing thermal effects and protecting performance and lifetime
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 magnetic field improves light uniformity and efficiency by up to 27% and effectively dissipates heat, extending the LED's performance and lifetime.
Implementation Method 1
The magnetic layer is coupled with thermal conductive material layer to produce a magnetic filed on the light emitting device
Implementation Method 2
The thermal conductive material layer is coupled with the light emitting device to dissipate heat generated by the light emitting device
Data Source
AI summary
A light emitting device with magnetic field includes a light emitting device, a thermal conductive material layer and a magnetic layer. The thermal conductive material layer is coupled with the light emitting device to dissipate heat generated by the light emitting device. The magnetic layer is coupled with thermal conductive material layer to produce a magnetic filed on the light emitting device.