Display Electrode Layout With Vertical Outgassing Openings
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Solution Overview
Problem
Current display devices face challenges in securing an effective outgassing path, which is crucial for the manufacturing and performance of light-emitting elements, particularly in complex wiring structures.
Innovation Solution
The proposed solution involves a display device design with specific layers and structures, including electrodes, insulating layers, and a bank configuration that forms outgassing paths to allow gas passage while maintaining the integrity of light-emitting elements, using organic materials for the via layer, insulating patterns, and bank, and strategically positioning openings to facilitate gas discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex wiring structures are used to increase device functionality, then adaptability is improved, but securing an effective outgassing path becomes more difficult
Solution Approach 1:
The patent divides the outgassing path into multiple segmented channels distributed across different insulating layers. Each insulating layer contains specific openings (first openings in the first insulating layer, second openings in the second insulating layer) that collectively form a complete outgassing pathway, allowing gas to escape through segmented routes rather than requiring a single continuous path.
Solution Approach 2:
The patent transitions from planar outgassing paths to three-dimensional vertical pathways by forming openings through multiple stacked insulating layers. The outgassing path extends in the thickness direction of the substrate, utilizing the vertical dimension to enable gas escape routes that are independent of the complex planar wiring structures.
2Productivity
If high-density wiring is implemented to increase integration, then productivity is improved, but outgassing path security deteriorates
Solution Approach 1:
The outgassing path is segmented into multiple distributed openings across different insulating layers rather than relying on single continuous channels. This segmentation allows the outgassing function to be maintained even when wiring density increases, as the segmented paths can be strategically positioned independent of the high-density wiring layout.
Solution Approach 2:
The insulating layers serve as intermediary structures that facilitate outgassing without interfering with the high-density wiring. The openings in the insulating layers provide dedicated gas escape routes that are spatially separated from the wiring structures, allowing both high integration density and effective outgassing to coexist.
3Reliability
If multiple insulating layers with openings are added to create outgassing paths, then outgassing effectiveness is improved, but device complexity increases
Solution Approach 1:
The insulating layers serve multiple functions: they provide electrical insulation between conductive layers and simultaneously contain openings that form the outgassing path. This multi-functionality allows the outgassing feature to be integrated into existing insulating layers without requiring additional dedicated structural elements, thereby limiting the increase in device complexity.
Solution Approach 2:
The outgassing path formation is merged with the insulating layer structure. The openings in the insulating layers are formed during the same manufacturing processes used to create the insulating layers themselves, combining the insulation and outgassing functions into a single integrated structure rather than adding separate outgassing components.
Data Source
AI summary
A display device includes electrodes on a base layer; a first insulating layer on the electrodes; a bank on the first insulating layer, protruding in a thickness direction of the base layer, and surrounding a region; light emitting elements in the region on the base layer; and connection electrodes electrically connected to the light emitting elements. The connection electrodes include an anode connection electrode electrically connected to the light emitting elements, a cathode connection electrode electrically connected to the light emitting elements, and an extension connection electrode on the bank. The first insulating layer forms at least one first opening. The at least one first opening overlaps the extension connection electrode in a plan view.