Light-Emitting Element Groove Alignment for Uniform Electrode Bridging
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Solution Overview
Problem
Existing light emitting devices face challenges in efficiently and uniformly aligning subminiature light emitting elements between electrodes, which affects emission characteristics.
Innovation Solution
A light emitting device design featuring a substrate with electrodes, an insulating layer with intersecting grooves, and contact portions exposing electrode areas, where light emitting elements are aligned using a combination of physical and electrical methods, including a rubbing process and electric field alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting elements are disposed between electrodes without alignment structures, then device structure is simple, but alignment efficiency and uniformity deteriorate
Solution Approach 1:
The insulating layer is segmented into multiple regions including a groove region and contact portions. The groove divides the space between electrodes into distinct alignment zones, enabling light emitting elements to be positioned uniformly between electrodes while maintaining electrical isolation. This segmentation resolves the contradiction by creating structural guidance without excessive complexity.
Solution Approach 2:
The groove and contact portions are formed in the insulating layer before disposing the light emitting elements. This preliminary structuring of the insulating layer creates pre-defined alignment paths and electrical connection points, enabling efficient and uniform placement of light emitting elements without requiring complex alignment procedures during assembly.
2Reliability
If contact portions are formed to expose electrode areas, then electrical connection is improved, but insulating layer complexity increases
Solution Approach 1:
The insulating layer is segmented into a groove region and contact portions, where contact portions are strategically positioned to expose electrode areas. This segmentation enables reliable electrical connection at specific points while the groove region maintains electrical isolation for light emitting elements, resolving the contradiction between connection reliability and structural complexity.
Solution Approach 2:
The insulating layer exhibits different properties in different regions: the contact portions have openings for electrical connection while the groove region provides isolation. This local differentiation of the insulating layer's structure and function enables simultaneous achievement of reliable electrical connection and simplified overall design.
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
Enhances the emission characteristics of the light emitting device by improving alignment efficiency and uniformity of light emitting elements between electrodes, leading to better luminance and efficiency.
Implementation Method 1
an insulating layer disposed on the substrate on which the first and the second electrodes are formed, and including a groove extending in a first direction intersecting with the first and the second electrodes
Implementation Method 2
a plurality of light emitting elements disposed on the groove and located between the first and the second electrodes
Data Source
Figure 1A~2B
Figure 3A~3B
Figure 4
AI summary
A light emitting device may include: a substrate; first and second electrodes disposed on the substrate; an insulating layer disposed on the substrate on which the first and the second electrodes are formed, and including a groove extending in a first direction intersecting with the first and the second electrodes, and first and second contact portions configured to expose areas of the first and the second electrodes; light emitting elements disposed on the groove between the first and the second electrodes, and each including first and second ends electrically connected to the first and second electrodes; a first contact electrode electrically connected to the light emitting elements on the first end, and electrically connected to the first electrode on the first contact portion; and a second contact electrode electrically connected to the light emitting elements on the second end, and electrically connected to the second electrode on the second contact portion.