LED Connection Wiring Vertical Layout for Light Extraction
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Solution Overview
Problem
Current light emitting devices face limitations in maximizing light efficiency due to restricted light emitting areas, which affects their performance in various applications such as display apparatuses and lighting appliances.
Innovation Solution
The design includes a light emitting structure with a first and second conductive semiconductor layer, an active layer, a channel layer, and electrodes, where the connection wiring minimizes the metal layer area on the first conductive semiconductor layer, allowing for an expanded light emitting area and improved light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a conventional electrode structure is used, then electrical connection is achieved, but the light emitting area is reduced due to metal layer coverage
Solution Approach 1:
The connection wiring transitions from a planar two-dimensional layout to a three-dimensional structure by extending vertically along the side surface of the light emitting structure. This dimensional change allows the wiring to connect the first electrode to the first conductive semiconductor layer without occupying additional lateral area on the light emitting surface, thereby resolving the contradiction between maintaining electrical connection reliability and maximizing light emitting area.
2Reliability
If metal layer area is increased for better electrical connection, then connection reliability improves, but light extraction efficiency decreases due to increased absorption
Solution Approach 1:
The connection wiring is extracted from the traditional planar configuration and repositioned to extend vertically along the side surface of the light emitting structure. This extraction removes the wiring from the light extraction path, eliminating the harmful light absorption by metal layers while maintaining electrical connection reliability between the first electrode and the first conductive semiconductor layer.
3Productivity
If the light emitting area is expanded, then light efficiency improves, but electrical connection becomes more difficult to implement
Solution Approach 1:
By utilizing the vertical dimension along the side surface of the light emitting structure, the connection wiring achieves electrical connection without occupying lateral space. This dimensional approach simplifies the overall device structure while enabling expanded light emitting area, as the wiring does not interfere with the light emitting region or require complex routing around it.
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 efficiency by expanding the light emitting area, leading to improved performance in display and lighting applications by minimizing absorption and maximizing light extraction.
Implementation Method 1
The LED converts electrical signals into the form of light such as infra-red light, ultra-violet light, and visible light by using the characteristic of a compound semiconductor.
Data Source
AI summary
The present invention relates to a light emitting device. The light emitting device according to an embodiment of the present invention comprises: a light emitting structure comprising a first conductive semiconductor layer, an active layer under the first conductive semiconductor layer, and a second conductive semiconductor layer under the active layer; a channel layer arranged around the lower portion of the light emitting structure; a first electrode arranged on the channel layer; a second electrode arranged under the light emitting structure; and a connection wiring for electrically connecting the first electrode and the first conductive semiconductor layer.