Light-Emitting Element Bonding for Stable Display Alignment
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Solution Overview
Problem
Display devices face challenges in maintaining the alignment of light-emitting elements during the fabrication process, particularly due to hydrodynamic forces that can displace them after alignment, leading to reduced emission reliability and pixel failure.
Innovation Solution
A display device design that incorporates a second insulating layer capable of forming covalent bonds with light-emitting elements, using a binding group and functional groups to fix the elements in place, thereby preventing displacement during the drying process and improving alignment reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light-emitting elements are aligned during fabrication, then alignment precision is improved, but hydrodynamic forces during drying process cause displacement and reduce reliability
Solution Approach 1:
The insulating layer is prepared with binding groups before light-emitting elements are placed, enabling immediate chemical bonding upon contact. This preliminary preparation ensures that elements are securely fixed from the moment of placement, preventing hydrodynamic displacement during subsequent drying processes while maintaining alignment precision
Solution Approach 2:
The insulating layer acts as an intermediary between the substrate and light-emitting elements, providing binding groups that chemically bond to the elements. This intermediary layer secures elements in place during fabrication and operation, preventing displacement while maintaining precise alignment, thereby improving emission reliability
2Stability of the object's composition
If chemical bonding is implemented between insulating layer and light-emitting elements, then alignment stability is improved, but device complexity increases
Solution Approach 1:
The binding groups are integrated directly into the insulating layer material itself, merging the structural function of the insulating layer with the bonding function. This eliminates the need for separate bonding layers or additional components, achieving stable alignment without significantly increasing device complexity
Solution Approach 2:
The insulating layer is designed with specific chemical parameters (binding groups) that enable chemical bonding. By changing the chemical composition parameters of the insulating layer rather than adding structural complexity, alignment stability is improved while keeping the device structure relatively simple
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 covalent bonding between the insulating layer and light-emitting elements ensures stable alignment, enhancing the emission reliability of pixels and reducing connection failures, thus improving the overall performance of the display device.
Implementation Method 1
at least a part of a lower surface of the light-emitting element may be chemically bonded to the second insulating layer
Data Source
AI summary
A display device includes a first electrode, a second electrode spaced apart from the first electrode and facing the first electrode, a first insulating layer disposed to at least partially cover the first electrode and the second electrode, a second insulating layer disposed on at least a part of the first insulating layer, and a light-emitting element disposed on the second insulating layer between the first electrode and the second electrode, wherein at least a part of a lower surface of the light-emitting element is chemically bonded to the second insulating layer.