LED Reflective Layer Segmentation for Light Extraction
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Solution Overview
Problem
Current light emitting diodes (LEDs) face challenges in enhancing light emission efficiency due to limitations in light extraction, active layer structure, current spreading, and electrode design, which affect their brightness and performance.
Innovation Solution
A light emitting device is designed with a body, an insulating layer, electrodes, and a reflective layer, where the reflective layer makes contact with the insulating layer to maximize reflectance, reducing contact with electrodes and improving light emission efficiency by optimizing the contact area between the reflective layer and the insulating layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the reflective layer contacts the electrode, then the electrical connection is facilitated, but the reflectance is reduced due to electrode material absorption
Solution Approach 1:
The reflective layer is divided into multiple segments or regions, with some portions contacting the insulating layer and others positioned to reflect light, creating distinct functional zones that separate electrical connection from light reflection functions
Solution Approach 2:
Different regions of the reflective layer are designed with different properties: areas contacting the insulating layer provide electrical connection, while other areas are optimized for maximum light reflectance, allowing each region to perform its specific function optimally
2Loss of energy
If the reflective layer covers the entire surface, then the light extraction is maximized, but the electrode contact area is reduced
Solution Approach 1:
The reflective layer is segmented to create separate functional zones: one region provides extensive surface coverage for light extraction, while another region is specifically configured to contact the electrode for electrical connection
Solution Approach 2:
The reflective layer is configured in three-dimensional space to achieve both functions: it extends broadly across the surface for light reflection while having specific contact points or regions that reach down to contact the electrode, utilizing vertical dimensionality
3Loss of energy
If the contact area between reflective layer and insulating layer is increased, then the reflectance is improved, but the device complexity increases
Solution Approach 1:
The reflective layer is merged with the insulating layer structure, where the reflective layer is formed directly over or integrated with the insulating layer, combining two functional elements into a unified structure that reduces overall device complexity
Solution Approach 2:
The reflective layer serves multiple functions simultaneously: it provides light reflection, maintains electrical insulation through contact with the insulating layer, and structurally integrates with the electrode assembly, reducing the need for separate components
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 the light emission efficiency of the LED by increasing the reflectance of the reflective layer, leading to improved brightness and performance, while also allowing for easier integration with various materials and designs.
Implementation Method 1
a reflective layer formed over the insulating layer and the electrode... at least a part of the reflective layer makes contact with the insulating layer
Data Source
AI summary
Disclosed are a light emitting device and a method of manufacturing the same. The light emitting device includes a body, an insulating layer over a surface of the body, at least one electrode over the insulating layer, a light emitting diode connected to the electrode, and a reflective layer over the insulating layer.