LED Chip Circular Electrodes Current Distribution
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Solution Overview
Problem
Conventional LED chips face challenges in uniformly distributing current density while maintaining luminous intensity, as extending electrodes to reduce light-blocking area often leads to reduced light-emitting area and increased heat concentration.
Innovation Solution
The LED chip design includes a substrate with a semiconductor element, conductive layer, and circular electrodes that form a closed loop circuit, with strategically placed elongated electrodes to minimize light-blocking area and ensure uniform current distribution, enhancing luminous intensity and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the electrodes are extended to reduce light-blocking area, then the light-blocking area is reduced, but the light-emitting area is reduced and luminous intensity deteriorates
Solution Approach 1:
The patent employs circular electrodes instead of conventional linear or rectangular electrode patterns. The circular shape of the electrodes minimizes the light-blocking area while maintaining electrical connectivity, allowing light to pass through more efficiently without significantly reducing the light-emitting area, thus resolving the contradiction between reducing light-blocking area and maintaining luminous intensity
Solution Approach 2:
The patent introduces a multi-dimensional electrode arrangement where circular electrodes are positioned at specific heights and orientations within the LED structure. This spatial arrangement allows the electrodes to perform their electrical function while minimizing their projection area that blocks light, effectively separating the electrical connectivity function from the light transmission path
2Illumination intensity
If the luminous intensity is increased by reducing the light-blocking area of the electrodes, then the luminous intensity increases, but the current cannot be diffused uniformly and heat concentration is worsened
Solution Approach 1:
The patent divides the electrode system into multiple circular electrodes distributed across the LED structure rather than using a single large electrode. This segmentation allows current to be distributed through multiple pathways, preventing current concentration and reducing heat generation in any single location, while the circular shape of each electrode minimizes light-blocking area to maintain high luminous intensity
Solution Approach 2:
The patent creates different electrode configurations in different regions of the LED structure. The circular electrodes are strategically positioned and sized to provide optimal current distribution in high-density regions while maintaining minimal light-blocking characteristics, allowing each local region to have electrode properties optimized for both current diffusion and light transmission
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 design achieves improved luminous intensity and light extraction efficiency by uniformly distributing electric current and minimizing heat concentration, while maintaining a reduced light-blocking area.
Implementation Method 1
The light-emitting diode (LED) emits light by converting electric energy into optical energy
Implementation Method 2
The conductive layer is disposed on the second-type semiconductor layer, and the second electrode is disposed on the conductive layer
Data Source
AI summary
An LED chip is disclosed. The LED chip includes a substrate and a semiconductor element formed on the substrate. A recess is formed on the semiconductor element so as to expose a first-type of semiconductor layer thereof to the environment. The LED chip also includes a conductive layer disposed on a second-type semiconductor layer of the semiconductor element, a first electrode disposed in the recess and electrically connected to the first-type of semiconductor layer, and a second electrode disposed on the conductive layer. In addition, the LED chip includes a first circular electrode disposed on the conductive layer and extending along an edge of the substrate and electrically connected to the second electrode.