AC-Driven LED Structure with Segmented Cells and Insulating Layers
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Solution Overview
Problem
Existing light emitting devices, such as LEDs, face challenges in being efficiently driven by AC power due to their structural limitations, which affect their luminance and uniformity when used in various applications like displays and vehicle lighting.
Innovation Solution
A light emitting device structure comprising a conductive substrate, insulating layers, and light emitting cells interconnected by a connection layer, with specific contact sections for AC power connection, allowing for serial and parallel connections to ensure uniform luminance and efficient AC power driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional LED structures are used, then the device can be driven by DC power, but it cannot be efficiently driven by AC power
Solution Approach 1:
The LED device is divided into multiple light emitting device cells arranged in series, with each cell having its own contact sections. This segmentation allows the overall device to handle higher AC voltages while maintaining proper operation of individual cells, enabling AC power driving capability without excessive complexity in any single cell structure.
Solution Approach 2:
The patent introduces a vertical stacking arrangement where light emitting device cells are stacked along the vertical direction with insulating layers between them. This three-dimensional configuration allows AC power driving while maintaining compact form factor, resolving the contradiction between AC adaptability and structural complexity.
2Illumination intensity
If multiple light emitting device cells are connected, then uniform luminance can be achieved, but the device structure becomes more complex
Solution Approach 1:
Multiple light emitting device cells are merged into a single integrated structure with shared conductive substrate and coordinated contact sections. The cells are electrically connected through the conductive substrate and insulating layer arrangement, achieving uniform luminance output while avoiding the complexity of separate connection structures for each cell.
Solution Approach 2:
The conductive substrate and insulating layer structure serves multiple functions simultaneously: it provides mechanical support, electrical connection between cells, electrical isolation, and structural framework. This multi-functionality reduces the need for additional components, achieving uniform luminance from multiple cells without proportionally increasing device complexity.
3Adaptability or versatility
If insulating layers are added to enable AC driving, then AC power compatibility is improved, but manufacturing complexity increases
Solution Approach 1:
Insulating layers are formed between light emitting device cells during the initial fabrication process, before final assembly and connection. This preliminary action integrates the insulating function into the base structure, enabling AC power compatibility while avoiding the need for additional manufacturing steps or complex assembly procedures.
Solution Approach 2:
The insulating layers are formed with uniform material composition and consistent thickness across all cell interfaces using standardized fabrication processes. This homogeneity ensures AC power compatibility throughout the device while maintaining ease of manufacture through repeatable, simple fabrication steps rather than complex variable processes.
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
The proposed structure enables a light emitting device that can be efficiently driven by AC power, ensuring uniform luminance and efficient operation in applications like displays and vehicle lighting.
Implementation Method 1
An LED (light emitting diode) is a semiconductor light emitting device for converting electric current into light
Data Source
AI summary
A light emitting device that includes a conductive substrate, an insulating layer on the conductive substrate, a plurality of light emitting device cells on the insulating layer, a connection layer electrically interconnecting the light emitting device cells, a first contact section electrically connecting the conductive substrate with at least one light emitting device cell, and a second contact section on the at least one light emitting device cell.