LED Electrode Layout With Residual Insulation Against Short Circuits
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Solution Overview
Problem
Existing light emitting diode (LED) devices face issues with short-circuits between lateral electrodes due to unexpected particles, and there is a need to increase the number of LEDs arranged between these electrodes.
Innovation Solution
A light emitting device is designed with a substrate, first and second electrodes, and a residual pattern between the LEDs and the substrate, using a material different from the substrate, electrodes, and LEDs, along with contact and insulation patterns to prevent short-circuits and maintain LED connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If lateral electrodes are placed close to each other to increase LED density, then the number of LEDs between electrodes increases, but short-circuit risk due to particles increases
Solution Approach 1:
An insulation pattern is introduced as an intermediary element between the first and second lateral electrodes. This insulation pattern physically separates the electrodes, preventing direct contact and short-circuits caused by particles, while still allowing the electrodes to be positioned close together for high LED density.
Solution Approach 2:
The space between lateral electrodes is segmented by introducing insulation patterns that divide the region into isolated zones. This segmentation prevents particles from causing short-circuits by creating physical barriers that separate conductive paths.
2Reliability
If insulation patterns are added to prevent short-circuits, then reliability improves, but device complexity increases
Solution Approach 1:
The insulation pattern is merged with the existing electrode structure and LED arrangement. The insulation pattern is positioned to naturally fit within the device architecture, combining multiple functions (insulation, structural support, and spatial organization) into a single integrated element.
3Reliability
If contact patterns are added to improve LED connectivity, then electrical connection reliability improves, but manufacturing complexity increases
Solution Approach 1:
Contact patterns are formed in advance during the manufacturing process, before final assembly. The contact patterns are pre-positioned to ensure proper electrical connections, eliminating the need for complex post-assembly wiring or connection procedures.
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 solution effectively prevents short-circuits and allows for an increased number of LEDs between electrodes, enhancing light emission efficiency and connectivity.
Implementation Method 1
arranging the plurality of light emitting diodes between the first electrode and the second electrode by forming an electromagnetic field between the first electrode and the second electrode
Data Source
AI summary
A light emitting device includes: a substrate; a first electrode and a second electrode provided at a distance from each other on the substrate and extending in one direction; a plurality of light emitting diodes provided between the first electrode and the second electrode, and connected to the first electrode and the second electrode; and a residual pattern provided between at least one of the plurality of light emitting diodes and the substrate.