Multicolor LED Structure With Partitioned Reflective Isolation
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Solution Overview
Problem
Semiconductor light emitting devices face challenges in achieving multicolor functionality while preventing optical interference and improving light extraction efficiency.
Innovation Solution
The semiconductor light emitting device incorporates a plurality of light emitting structures isolated by a partition layer, with a three-layer reflective structure covering the side walls of the partition layer, including a first protective layer, a reflective layer, and a second protective layer, to prevent optical interference and enhance light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light emitting structures are integrated to achieve multicolor functionality, then color versatility is improved, but optical interference between adjacent cells increases
Solution Approach 1:
The device divides the light emitting surface into multiple independent light emitting cells, each capable of emitting different colors. The isolation layer segments these cells to prevent optical interference while maintaining individual control, enabling multicolor functionality through spatial separation of light sources
Solution Approach 2:
An isolation layer is introduced as an intermediary element between adjacent light emitting structures. This layer acts as a barrier that blocks optical interference between cells while allowing each cell to maintain its light emitting function, thus enabling multicolor operation without cross-talk
2Area of stationary object
If light emitting structures are placed close together to reduce device size, then device compactness is improved, but light extraction efficiency decreases
Solution Approach 1:
The reflective layer is positioned on the side walls of the partition layer, utilizing the vertical dimension to redirect light that would otherwise be lost. This three-dimensional light management approach allows compact horizontal spacing while maintaining high light extraction efficiency through vertical reflection paths
3Object-affected harmful factors
If isolation structures are added to prevent optical interference, then optical performance is improved, but device complexity increases
Solution Approach 1:
The partition layer serves multiple functions simultaneously: it provides electrical isolation between adjacent light emitting cells, supports the reflective layer on its side walls, and contributes to the overall structural framework. This multi-functionality reduces the need for separate isolation structures, thereby limiting the increase in device complexity
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 allows for multicolor representation and improved light extraction efficiency by isolating individual light emitting cells and utilizing a reflective structure to manage light emission effectively.
Implementation Method 1
a reflective layer covering the first protective layer and disposed on the side walls of the partition layer
Data Source
AI summary
A semiconductor light emitting device includes a plurality of light emitting structures, an isolation layer covering side surfaces of the plurality of light emitting structures and insulating the plurality of light emitting structures from one another, a partition layer formed on the isolation layer, a first protective layer covering top surfaces of the plurality of light emitting structures and side walls of the partition layer, a reflective layer covering the first protective layer and disposed on the side walls of the partition layer, and a second protective layer covering the reflective layer.