Asymmetric Electrode Light-Emitting Device for Uniform Illuminance
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Solution Overview
Problem
Existing light-emitting devices face challenges in achieving uniform illuminance and high reliability, which are crucial for replacing traditional lighting sources with environmentally friendly and efficient LEDs.
Innovation Solution
A light-emitting device design featuring a substrate with spaced-apart light-emitting cells and a connection line that electrically interconnects them, utilizing distinct planar shapes and arrangements of electrodes and through-holes for improved electrical insulation and light distribution, ensuring uniformity and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrode designs are used in light-emitting cells, then manufacturing is simpler, but light-emitting uniformity and reliability deteriorate
Solution Approach 1:
The patent applies asymmetry by designing the first electrode with a first planar shape and the second electrode with a second planar shape that are different from each other. This asymmetric electrode configuration optimizes current distribution and electrical field uniformity across the light-emitting cell, thereby improving light-emitting uniformity and reliability without requiring overly complex structures
Solution Approach 2:
The patent implements local quality by optimizing specific geometric parameters of the electrodes (such as width, length, spacing, and shape characteristics) to create non-uniform electrical field distribution that compensates for edge effects and improves overall uniformity. This allows targeted optimization of critical regions without redesigning the entire device
2Reliability
If insulation structures are added between connection lines and light-emitting cells, then electrical insulation improves, but device complexity increases
Solution Approach 1:
The patent introduces an insulation layer as an intermediary element positioned between the connection line and the light-emitting cells. This insulation layer serves as a mediator that provides necessary electrical isolation, preventing short circuits and improving reliability while maintaining a relatively simple overall device structure through its strategic placement
Data Source
AI summary
The light-emitting device according to one embodiment includes a substrate; a plurality of light-emitting cells disposed on the substrate so as to be spaced apart from each other; and a connection line configured to electrically interconnect neighboring light-emitting cells, wherein each of the light-emitting cells includes: a light-emitting structure including a first semiconductor layer, an active layer, and a second semiconductor layer disposed on the substrate; and first and second electrodes configured to be electrically connected to the first and second semiconductor layers respectively, wherein the light-emitting cells include: a first power cell configured to receive first power via the first electrode; and a second power cell configured to receive second power via the second electrode, and wherein the first electrode in the first power cell has a first planar shape different from a second planar shape of the second electrode in the second power cell.