Micro LED Resonance Cavity Structure for Higher Light Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current micro LED technology faces challenges in improving light emission efficiency.
Innovation Solution
A micro LED structure is developed, featuring a bonding layer, an N-type semiconductor layer, a light emitting layer, and a P-type semiconductor layer, with a resonance cavity structure formed by the N-type and P-type semiconductor layers to enhance light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional LED structure is used, then manufacturing is simpler, but light emission efficiency is lower
Solution Approach 1:
The patent applies optical resonance (analogous to mechanical vibration principles) by designing a cavity structure with specific dimensions that resonate at particular wavelengths. The cavity length is optimized to create constructive interference and enhance light emission at target wavelengths, thereby improving light emission efficiency without complicating the manufacturing process
Solution Approach 2:
The patent optimizes specific parameters including cavity length, layer thicknesses, and material composition ratios to enhance light emission efficiency. By adjusting these parameters, the structure achieves resonance conditions that improve light output while maintaining manufacturing feasibility
2Loss of energy
If resonance cavity structure is added, then light emission efficiency is improved, but device complexity increases
Solution Approach 1:
The cavity structure serves multiple functions: it enhances light emission efficiency through resonance, defines the emission wavelength, and integrates with the existing LED layer structure. This multi-functionality justifies the added structural complexity by delivering multiple benefits from a single design element
Solution Approach 2:
The patent introduces a vertical cavity dimension to the planar LED structure, creating a three-dimensional resonant structure. This additional dimension enables optical resonance effects that significantly improve light emission efficiency while the horizontal footprint remains compact
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 proposed micro LED structure increases light emission efficiency through multiple reflections within the resonance cavity structure, improving beam angle and reducing metal absorption, thereby enhancing overall light output performance.
Implementation Method 1
A resonance cavity structure is formed by the N type semiconductor layer and the P type semiconductor layer
Implementation Method 2
A resonance cavity structure is formed by the N type semiconductor layer and the P type semiconductor layer
Implementation Method 3
a light emitting layer formed on the N type semiconductor layer
Implementation Method 4
light emitting layer
Data Source
AI summary
A micro LED includes a bonding layer; an N type semiconductor layer formed on the bonding layer; a light emitting layer formed on the N type semiconductor layer; and a P type semiconductor layer formed on the light emitting layer. A resonance cavity structure is formed by the N type semiconductor layer and the P type semiconductor layer.