Display Electrode Venting Structure for Organic Gas Exhaust
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Solution Overview
Problem
Current display apparatuses face challenges in manufacturing due to gas emissions from organic insulating layers, which can affect surrounding light-emitting diodes and cause defects, particularly when inorganic insulating materials are used, as they do not allow vaporized impurities to pass through.
Innovation Solution
Incorporating a conductive bank layer with inner and outer exhaust openings, along with an insulating layer and protection layer, to facilitate the discharge of gases and impurities, thereby preventing damage to light-emitting diodes during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inorganic insulating layer is used to replace the organic insulating layer, then the insulating performance and stability are improved, but gas emissions during manufacturing affect surrounding LEDs and cause defects
Solution Approach 1:
The patent introduces an organic insulating layer as an intermediary between the inorganic insulating layer and the light-emitting diodes. This organic layer serves as a buffer that can absorb and vent gas emissions during manufacturing, preventing direct damage to the LEDs while allowing the inorganic layer to provide superior insulating performance. The organic insulating layer acts as a protective mediator that resolves the conflict between using inorganic materials and preventing gas-related defects.
Solution Approach 2:
The patent applies different insulating materials in different regions: an inorganic insulating layer is used where high insulating performance is needed, while an organic insulating layer is used in regions where gas emission management is critical. This localized application of different material properties allows the system to simultaneously achieve both high reliability and protection against gas emissions.
2Object-generated harmful factors
If gas emission pathways are added to the structure, then gas discharge capability is improved, but the device structure becomes more complex
Solution Approach 1:
The organic insulating layer serves multiple functions simultaneously: it provides electrical insulation, manages gas emissions during manufacturing, and protects underlying structures. By making the insulating layer multi-functional, the patent achieves gas discharge capability without adding separate dedicated structures, thereby minimizing increases in device complexity.
Solution Approach 2:
The patent combines the gas emission management function with the insulating layer itself, rather than adding a separate gas venting structure. The organic insulating layer is designed to inherently allow gas passage while maintaining its insulating properties, merging two functions into a single component to avoid increasing structural complexity.
Data Source
AI summary
A display apparatus includes a substrate including a display area and a non-display area, an organic insulating layer on the substrate, a first sub-pixel electrode on the organic insulating layer in the display area, a conductive bank layer including a first opening overlapping the first sub-pixel electrode, and a first conductive layer and a second conductive layer having different etch selectivities from each other, an insulating layer between the first sub-pixel electrode and the conductive bank layer, the insulating layer including an opening overlapping the first opening, a first intermediate layer on the first sub-pixel electrode, a first opposite electrode on the first intermediate layer, and a first inorganic barrier layer on the first opposite electrode. The conductive bank layer includes an inner exhaust opening around the first opening and overlapping the organic insulating layer, and the insulating layer includes an exhaust opening overlapping the inner exhaust opening.