Display Device Insulating-Layer Openings for Stable Electrode Connections
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Solution Overview
Problem
Display devices face issues with upper connection electrodes becoming disconnected due to agglomeration of light emitting elements or particles, which can lead to performance degradation.
Innovation Solution
The display device design includes a bank layer with specific electrode configurations and insulating layers that form open portions to prevent electrode disconnection by allowing for electrical connections to be maintained despite agglomeration, using a first and second insulating layer with strategically placed open portions to expose electrode ends and facilitate connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light emitting elements are densely arranged to improve display resolution, then the display quality is improved, but the upper connection electrode becomes disconnected due to agglomeration of light emitting elements or particles
Solution Approach 1:
The second insulating layer is divided into multiple open portions (first main open portion, second main open portion, and sub-open portion) that segment the coverage area. This segmentation prevents agglomeration of light emitting elements and particles in specific regions, thereby maintaining electrode connection stability while allowing dense arrangement of light emitting elements for high display resolution.
Solution Approach 2:
The second insulating layer acts as an intermediary structure between the light emitting elements and the upper connection electrode. By strategically positioning open portions in this intermediary layer, the patent prevents direct contact and agglomeration between light emitting elements and the electrode, ensuring reliable electrical connection while maintaining high display resolution.
2Reliability
If insulating layers are added to prevent electrode disconnection, then electrode connection stability is improved, but the device structure becomes more complex
Solution Approach 1:
The second insulating layer serves multiple functions simultaneously: it provides electrical insulation, prevents agglomeration of light emitting elements and particles, and maintains structural integrity. By making this single layer multi-functional, the patent achieves improved electrode connection stability without proportionally increasing device complexity.
Solution Approach 2:
The patent addresses the electrode disconnection problem by introducing vertical layering (adding the second insulating layer) rather than complicating the horizontal electrode design. This dimensional approach allows the structure to prevent agglomeration effectively while keeping the overall device complexity manageable through systematic layering.
Data Source
AI summary
A display device comprises at least one first electrode, at least one second electrode, a first insulating layer, a light emitting element disposed between the at least one first electrode and the at least one second electrode on the first insulating layer, the light emitting element including an end and another end opposite to the end, and a second insulating layer disposed on the light emitting element and exposing the end and the another end of the light emitting element. The second insulating layer includes a first main open portion exposing the end of the light emitting element and extended in a first direction, a second main open portion exposing the another end of the light emitting element and extended in the first direction, and a sub-open portion connecting the first main open portion with the second main open portion in a plan view and extended in a second direction.