Magnetic LED Element Structure for Precise Self-Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices, particularly those using light emitting diodes (LEDs), face challenges in achieving high light efficiency and minimizing transfer tolerance during the assembly process, which affects the display's luminance uniformity and manufacturing efficiency.
Innovation Solution
Incorporating a magnetic layer between the electrodes and semiconductor layers in the light emitting elements, with a cross-sectional area increase from one side to the other, and using reflective layers to enhance light extraction, allows for self-assembly and reduces the number of transfer processes, thereby improving light efficiency and process optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple transfer processes are used to assemble light emitting elements, then assembly precision can be improved, but manufacturing complexity and time increase
Solution Approach 1:
The patent combines multiple transfer processes into a single integrated transfer operation. The light emitting element is transferred directly from the growth substrate to the final substrate in one process, eliminating intermediate transfer steps. This reduces manufacturing complexity while maintaining assembly precision through the use of a magnetic layer for precise positioning during the single transfer operation.
Solution Approach 2:
The patent introduces a magnetic layer as an intermediary component that enables precise positioning and control during the transfer process. This magnetic layer acts as a mediator between the transfer mechanism and the light emitting element, allowing for accurate placement without requiring multiple complex transfer steps.
2Ease of manufacture
If light emitting elements have uniform cross-sectional area, then manufacturing is simpler, but light extraction efficiency decreases
Solution Approach 1:
The patent employs an asymmetric cross-sectional area design for the light emitting element, where the cross-sectional area varies along the vertical direction. This asymmetric structure enhances light extraction efficiency by reducing total internal reflection at the interfaces, allowing more light to escape. The asymmetric design is achieved through controlled growth conditions during semiconductor layer formation.
Solution Approach 2:
The patent applies local quality by creating regions with different cross-sectional areas at specific locations within the light emitting element. The varying cross-sectional area is concentrated in regions where light extraction is most critical, while other regions maintain simpler structures. This localized optimization improves light extraction without significantly complicating the overall manufacturing process.
3Productivity
If transfer processes are reduced for self-assembly, then manufacturing time decreases, but assembly precision may worsen
Solution Approach 1:
The magnetic layer serves as an intermediary that enables precise self-assembly during the reduced transfer process. It provides magnetic interaction that guides and positions the light emitting element accurately on the substrate, compensating for the reduction in transfer process steps and maintaining high assembly precision.
Solution Approach 2:
The patent implements self-assembly functionality where the light emitting element automatically positions itself on the substrate through magnetic interaction. This self-service mechanism eliminates the need for complex external positioning systems and multiple transfer steps, achieving both high productivity and precision through the element's own magnetic properties.
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 configuration enhances light extraction efficiency, minimizes transfer tolerance, and simplifies the manufacturing process, leading to improved display quality and reduced costs.
Implementation Method 1
a plurality of light emitting elements are self-assembled on a third passivation layer
Implementation Method 2
light efficiency may be improved by including a reflective layer disposed on a side surface or a lower surface of a light emitting element
Data Source
AI summary
A light emitting element includes at least one first electrode, a first semiconductor layer, a light emitting layer, a second semiconductor layer, a second electrode, and at least one magnetic layer, wherein the magnetic layer is disposed between the first electrode and the first semiconductor layer or between the second electrode and the second semiconductor layer, wherein a cross-sectional area of the light emitting element increases from one side where the magnetic layer is disposed to an opposite side.