Micro-LED Light Source Structure for Low-Current Efficiency
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Solution Overview
Problem
Micro-LEDs in mobile terminals suffer from low light emitting efficiency at low current density, which affects power consumption and light energy utilization, failing to meet display requirements.
Innovation Solution
A light source component with a conductive layer that applies an electric field force to carriers, preventing them from being captured by surface non-radiative recombination centers, and includes reflective and anti-reflective coatings to enhance light output efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If micro-LED operates at low current density, then power consumption is reduced, but light emitting efficiency decreases
Solution Approach 1:
The patent converts the harmful effect of surface non-radiative recombination centers into a beneficial outcome by introducing a conductive layer that generates an electric field. This electric field actively repels carriers away from the surface regions where non-radiative recombination occurs, transforming the previously harmful surface effects into a controlled phenomenon where carriers are guided toward the light emitting layer for efficient radiative recombination, thus maintaining high light emitting efficiency at low current density operation
2Ease of manufacture
If micro-LED uses conventional structure, then manufacturing is simple, but carrier capture by surface non-radiative recombination centers reduces light output efficiency
Solution Approach 1:
The patent introduces a conductive layer as an intermediary element between the electrodes and the semiconductor layers. This conductive layer serves as a mediator that generates an electric field to influence carrier distribution, preventing carrier capture by surface non-radiative recombination centers without complicating the overall manufacturing process, as the conductive layer can be integrated into the existing micro-LED fabrication工艺流程
Solution Approach 2:
The patent changes the electrical parameter distribution within the micro-LED by introducing the conductive layer, which modifies the electric field distribution and carrier concentration profiles. This parameter change enables better control over carrier movement, reducing unwanted surface recombination and improving light output efficiency while maintaining compatibility with conventional manufacturing approaches
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
Improves light emitting efficiency by reducing carrier capture at non-radiative recombination centers, enhancing light output, and optimizing power consumption in micro-LEDs for mobile terminals.
Implementation Method 1
The conductive layer may adjust and control, through electric field force, the carrier to be far away from at least one of the two surface non-radiative recombination centers
Implementation Method 2
A micro-LED (micro light emitting diode) is a new generation display technology
Implementation Method 3
The light emitting layer is located between the first semiconductor layer and the second semiconductor layer
Data Source
AI summary
A light source component, for a display apparatus and/or a mobile terminal, includes a first semiconductor layer, a light emitting layer, and a second semiconductor layer that are laminated. The light emitting layer is located between the first semiconductor layer and the second semiconductor layer. A surface that is of the second semiconductor layer and that is away from the light emitting layer is an out-light surface. A side surface of the semiconductor layer has a surface non-radiative recombination center. When the light source component works, the surface non-radiative recombination center captures a carrier in the semiconductor layer, and non-radiative recombination of the carrier occurs on the side surface. This reduces light emitting efficiency of the light source component.