Light-Emitting Element Insulation Structure to Prevent Agglomeration
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Solution Overview
Problem
Subminiature light emitting elements used in display devices face issues with agglomeration, leading to deterioration in light-emitting characteristics due to their small size and proximity to each other, which can result in short-circuits and reduced performance.
Innovation Solution
A light emitting element design featuring an emission stacked pattern with a rod shape and an insulating film of non-uniform thickness, where the outer surface of the insulating film has a different shape than the emission stacked pattern, preventing adjacent elements from agglomerating by maintaining a sufficient distance through the use of protrusions and varying thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subminiature light emitting elements are made with small size and placed close to each other, then the productivity and resolution of display devices are improved, but the elements tend to agglomerate causing short-circuits and deterioration in light-emitting characteristics
Solution Approach 1:
The insulating film is designed with non-uniform thickness, featuring a first thickness in a first region and a second thickness in a second region. This local variation in insulating film properties prevents agglomeration of adjacent light emitting elements in specific areas while maintaining overall device compactness, thereby resolving the contradiction between high resolution and reliable light-emitting performance
Solution Approach 2:
The insulating film acts as an intermediary layer between adjacent light emitting elements. By providing different thicknesses in different regions, it mediates the interaction between elements, preventing direct contact and agglomeration while allowing the elements to remain in close proximity for high-resolution display applications
2Ease of manufacture
If the insulating film has uniform thickness, then the manufacturing process is simplified, but adjacent light emitting elements cannot be effectively prevented from agglomerating
Solution Approach 1:
The insulating film is designed with non-uniform thickness, featuring a first thickness in a first region and a second thickness in a second region. This local variation in insulating film properties prevents agglomeration of adjacent light emitting elements in specific areas while maintaining overall device compactness, thereby resolving the contradiction between high resolution and reliable light-emitting performance
Solution Approach 2:
The insulating film structure is designed in advance with specific thickness variations to prevent agglomeration before it occurs. By pre-configuring the film thickness profile during manufacturing, the design anticipates and prevents element agglomeration issues that would otherwise arise during device operation or assembly
Data Source
AI summary
A light emitting element includes an emission stacked pattern and an insulating film. The emission stack pattern includes a first conductive semiconductor layer, an active layer disposed on the first conductive semiconductor layer, and a second conductive semiconductor layer disposed on the active layer. The insulating film surrounds an outer surface of the emission stacked pattern and has a non-uniform thickness.