Light-emitting Apparatus Groove for Moisture Resistance
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Solution Overview
Problem
Existing light-emitting apparatus using organic EL elements face challenges in moisture resistance, leading to increased size and reduced effectiveness due to the placement and deposition of organic layers.
Innovation Solution
A light-emitting apparatus with a groove between the light-emitting region and the end of the insulating layer, where the organic layer is separated by a protective layer, enhancing moisture resistance without increasing the apparatus' size by optimizing the groove's shape and depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the organic layer is formed on the entire surface of the substrate without any measure, then the deposition process is simple, but the moisture resistance of the light-emitting apparatus is reduced
Solution Approach 1:
The patent divides the insulating layer into two distinct regions: a light-emitting region and a non-light-emitting region. The organic layer is selectively formed only on the light-emitting region, creating a segmented structure that prevents continuous organic layer formation from the substrate end to the light-emitting region, thereby blocking moisture penetration paths while maintaining manufacturing feasibility through region-specific deposition
2Reliability
If the organic layer is formed only inside the groove with extra distance from the light-emitting region, then the moisture resistance is improved, but the size of the light-emitting apparatus increases
Solution Approach 1:
The patent transitions from a horizontal separation approach (creating distance gaps) to a vertical dimension solution by forming the organic layer selectively on the light-emitting region surface. This dimensional change allows the organic layer to be confined precisely where needed without requiring additional horizontal space, thus improving moisture resistance without increasing apparatus size
3Reliability
If a groove is formed between the light-emitting region and the end of the substrate, then the moisture penetration path is lengthened, but the deposition accuracy requirements increase
Solution Approach 1:
The patent applies local quality by making the organic layer's presence or absence depend on the local region's function. The organic layer is formed only on the light-emitting region where it is needed for device operation, and is deliberately omitted from the non-light-emitting region to block moisture paths. This local differentiation achieves moisture resistance without requiring high deposition accuracy across the entire substrate
Data Source
AI summary
A light-emitting apparatus includes an insulating layer including a light-emitting region including a light-emitting element, and a groove provided in the insulating layer. The groove is provided in a portion between the light-emitting region and an end of the insulating layer, and has a zigzag pattern or a wrapping pattern.