Light Emitting Element Protrusions for Precise Display Alignment
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Solution Overview
Problem
Defective alignment of light emitting elements in display devices can deteriorate display quality, and improving emission efficiency of these elements can enhance display quality.
Innovation Solution
A light emitting element with a bonding electrode and a light emitting stack featuring protrusion structures on its upper surface, including a first protrusion and a second protrusion spaced apart from the groove defined by the first protrusion, which provides enhanced fixing force and improves light output efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light emitting elements are aligned at preset positions in display devices, then display quality is maintained, but alignment defects can deteriorate display quality
Solution Approach 1:
The protrusion structure is formed on the light emitting stack before bonding to the substrate, creating a mechanical interlocking feature that ensures accurate alignment during the bonding process. The protrusion fits into a corresponding groove on the substrate, preventing misalignment and ensuring the light emitting element is positioned at the preset location with high precision and reliability.
2Productivity
If emission efficiency of light emitting elements is improved, then display quality is improved, but light output efficiency needs enhancement
Solution Approach 1:
The protrusion structure extends vertically from the light emitting stack, creating a three-dimensional mechanical interlocking feature. This vertical dimension enhances the bonding interface between the light emitting element and substrate, ensuring stable positioning that maintains high emission efficiency and light output efficiency without compromise.
Data Source
AI summary
A light emitting element includes a bonding electrode, and a light emitting stack including a first semiconductor layer, an active layer, and a second semiconductor layer sequentially disposed each other on the bonding electrode. At least one protrusion structure is defined on an upper surface of the light emitting stack, and the protrusion structure includes a first protrusion protruding in a direction away from the bonding electrode and defining a groove concave in a direction facing the bonding electrode, and a second protrusion protruding in a direction away from the bonding electrode in the groove of the first protrusion.