Light Emitting Device Electrode Matrix for Extraction
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Solution Overview
Problem
Current light emitting devices face challenges in improving light extraction efficiency, reducing operating voltage, and enhancing reliability and luminosity.
Innovation Solution
The design incorporates a light emitting structure with a first and second conductivity type semiconductor layer, an active layer, a protective layer with a light extraction structure, and a unique electrode configuration that includes a main electrode and peripheral electrodes with metal dots, along with a bonding layer and support substrate to optimize light extraction and voltage application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional electrode structure is used, then the device structure is simple, but the light extraction efficiency is low
Solution Approach 1:
The electrode is divided into a main electrode and multiple peripheral electrodes arranged in a matrix pattern. This segmentation allows light to be extracted from multiple locations on the semiconductor layer, increasing overall light extraction efficiency while maintaining a relatively simple manufacturing process
Solution Approach 2:
The electrode structure transitions from a conventional single-layer configuration to a multi-dimensional matrix arrangement with main electrodes and peripheral electrodes at different positions. This dimensional expansion creates multiple light extraction pathways without significantly complicating the manufacturing process
2Use of energy by moving object
If the operating voltage is reduced to improve energy efficiency, then the energy consumption decreases, but the luminosity and reliability deteriorate
Solution Approach 1:
The segmented electrode structure with multiple contact points reduces the overall operating voltage by distributing the electrical load across multiple pathways. This voltage reduction lowers energy consumption while the multiple electrode connections maintain adequate current distribution to preserve luminosity and reliability
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, reduces operating voltage, and improves the reliability and luminosity of the light emitting device.
Implementation Method 1
A light emitting diode converts an electric signal into light such as infrared, visible or ultraviolet light using characteristics of compound semiconductors
Implementation Method 2
a light extraction structure provided on an upper surface of the first conductive semiconductor layer
Implementation Method 3
a light extraction structure provided on an upper surface of the first conductive semiconductor layer
Data Source
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AI summary
A light emitting device according to an embodiment comprises: a light emitting structure including a first conductive semiconductor layer, an active layer disposed under the first conductive semiconductor layer, and a second conductive semiconductor layer disposed under the active layer; a protective layer disposed above the light emitting structure and including a through region; a first electrode disposed in the through region and electrically connected to the first conductive semiconductor layer; an electrode pad electrically connected to the first electrode, and having a first region disposed on the first electrode and a second region disposed on the protective layer; and a second electrode electrically connected to the second conductive semiconductor layer.