Display device using semiconductor light emitting diode
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Solution Overview
Problem
Existing display devices using semiconductor light emitting devices face challenges in securing sufficient light emitting area, improving light extraction efficiency, and enhancing bonding strength between magnetic layers during self-assembly.
Innovation Solution
The display device incorporates a base part with assembly electrodes, a dielectric layer, a barrier wall portion, and semiconductor light emitting devices with a magnetic layer extending in the longitudinal direction. This configuration allows for uniform assembly and improved bonding strength, while also optimizing light extraction and emitting area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If horizontal semiconductor light emitting devices are used for self-assembly with magnetic layers, then self-assembly is enabled, but the light emitting area is insufficient
Solution Approach 1:
The patent employs asymmetric magnetic layer configuration where the first magnetic layer has different properties than the second magnetic layer, enabling directional self-assembly while preserving light emitting area. The asymmetric structure allows the device to be guided in specific orientations during assembly without requiring symmetric electrode configurations that would reduce the active light emitting region.
Solution Approach 2:
The patent transitions from horizontal electrode configuration to vertical stacking architecture, adding the vertical dimension to the device structure. This dimensional change allows magnetic layers to be positioned at different heights (first magnetic layer below active layer, second magnetic layer above active layer), enabling self-assembly control without compromising the horizontal light emitting area of the active layer.
2Ease of operation
If magnetic layers are added for self-assembly, then self-assembly is achieved, but bonding strength between layers is insufficient
Solution Approach 1:
The patent uses composite material structures where magnetic layers are combined with conductive adhesive layers and electrode structures. The magnetic layers are integrated with conductive materials that provide both magnetic functionality for self-assembly and adhesive bonding capability, creating a composite structure that simultaneously achieves self-assembly and strong interlayer bonding.
Solution Approach 2:
The patent merges the magnetic layer function with the electrode function by integrating magnetic materials into the electrode structure. The magnetic layers are combined with conductive adhesive layers that serve dual purposes: providing magnetic interaction for self-assembly and providing mechanical bonding strength to secure layers together, eliminating the need for separate magnetic and bonding components.
3Ease of manufacture
If symmetric structure is used for self-assembly, then manufacturing is simplified, but light extraction efficiency is reduced
Solution Approach 1:
The patent applies local quality variations by positioning magnetic layers at specific locations (above and below the active layer) rather than uniformly throughout the device. This localized magnetic layer configuration provides the necessary self-assembly guidance while minimizing interference with light extraction pathways, allowing different regions of the device to have different functional properties.
Solution Approach 2:
The patent segments the magnetic layer functionality into distinct first and second magnetic layers positioned at different locations relative to the active layer. This segmentation allows independent optimization of each magnetic layer's properties and position, enabling self-assembly control while preserving light extraction efficiency by preventing magnetic materials from blocking light paths.
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 enhances assembly speed and accuracy, secures a large light emitting area, increases light extraction efficiency, and minimizes defects by improving the adhesive force of the magnetic layer.
Implementation Method 1
The self-assembly method is a method in which the semiconductor light emitting device finds its own position in a fluid
Implementation Method 2
each of the semiconductor light emitting devices may include a magnetic layer extending in a longitudinal direction
Implementation Method 3
a plurality of assembly electrodes extending in one direction and formed at predetermined intervals on the base part
Implementation Method 4
a dielectric layer stacked on the base part to cover the assembly electrodes
Implementation Method 5
a barrier wall portion stacked on the dielectric layer while forming a cell overlapping at least a portion of the assembly electrodes
Data Source
AI summary
Discussed is a display device including: a base part; a plurality of assembly electrodes extending in a first direction and disposed at predetermined intervals on the base part; a dielectric layer stacked on the base part to cover the plurality of assembly electrodes; a barrier wall portion stacked on the dielectric layer to define a cell overlapping at least a portion of the plurality of assembly electrodes along the first direction of the plurality of assembly electrode; and a plurality of semiconductor light emitting devices disposed in the cell, wherein the plurality of semiconductor light emitting devices comprise a magnetic layer extending in a longitudinal direction that intersects the first direction.