Micro-LED Electrode Reflective Layer for Higher Light Extraction
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Solution Overview
Problem
Micro-LEDs face challenges in improving light emission efficiency, requiring optimization to meet high resolution, low power consumption, and miniaturization demands in display applications.
Innovation Solution
The design includes a light-emitting element with a reflective layer positioned on one side of the electrode, facing away from the light emission surface, and a reflective region on the same side as the connection electrode, enhancing light reflection and reducing energy waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the size of LEDs is reduced to achieve micro-LEDs for high resolution and miniaturization, then the display resolution and flexibility are improved, but the light emission efficiency deteriorates
Solution Approach 1:
The patent applies local quality by creating a reflective layer with specific local properties (high reflectivity) at the electrode region. The reflective layer is positioned locally at the bottom electrode area to redirect light that would otherwise be lost, while the rest of the micro-LED structure maintains its miniaturized design for high resolution displays.
Solution Approach 2:
The patent converts the harmful effect of light being absorbed or lost at the electrode region into a beneficial effect. By placing a reflective layer at the electrode, the light that would be wasted is now reflected back through the light-emitting layer, converting energy loss into useful light output and improving overall emission efficiency.
2Loss of energy
If a reflective layer is added to improve light emission efficiency, then the light reflection and energy utilization are improved, but the device complexity increases
Solution Approach 1:
The reflective layer serves multiple functions: it reflects light to improve emission efficiency, provides electrical isolation between electrodes, and can be integrated with existing electrode structures. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving energy conservation.
Solution Approach 2:
The patent merges the reflective layer with the electrode structure, combining the electrical conduction function of the electrode with the light reflection function of the reflective layer. This integration approach reduces the total number of discrete layers and simplifies the manufacturing process compared to adding a separate reflective component.
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 improves light emission efficiency by reflecting incident light back to the emission surface, reducing energy loss and enhancing the performance of micro-LEDs in display applications.
Implementation Method 1
the reflective layer includes a first reflective region, and the first reflective region and the first connection electrode are located on the same side of the first electrode
Data Source
AI summary
Provided are a light-emitting element, a display panel, and a display device, where the light-emitting element includes a first electrode, a reflective layer and a first connection electrode; at least a part of a region of the reflective layer is located on one side, facing away from a light emission surface, of the first electrode; and the first electrode receives a signal through the first connection electrode; where the first electrode is connected to the first connection electrode, the reflective layer includes a first reflective region, and the first reflective region and the first connection electrode are located on the same side of the first electrode. The technical schemes of the embodiments of the present disclosure can improve the light emission efficiency of the light-emitting element.