Discontinuous Cathode Display Panel for Moisture Blocking
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Solution Overview
Problem
Existing display panel technologies face issues with moisture and oxygen infiltration due to continuous cathode layers, leading to oxidation of light-emitting layers, poor water and oxygen blocking performance, and increased manufacturing costs, especially in flexible and stretchable displays.
Innovation Solution
A display panel design featuring a blocking structure in the peripheral regions with a discontinuous cathode layer, which disrupts the water-oxygen erosion path and enhances packaging performance without compromising elasticity, using a blocking structure that can be made of photoresist or organic materials with specific geometries to improve adhesion and water-oxygen blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous cathode layer is used to ensure electrical connectivity, then electrical conductivity is improved, but water and oxygen blocking performance deteriorates due to continuous moisture infiltration paths
Solution Approach 1:
The cathode layer is segmented into multiple isolated cathode regions by the blocking structure, creating discontinuous segments that prevent continuous moisture infiltration paths while maintaining electrical connectivity through the light emitting structures. The blocking structure physically divides the cathode layer into separate zones.
Solution Approach 2:
The blocking structure acts as an intermediary element between adjacent cathode regions, preventing direct moisture infiltration paths while allowing electrical isolation. This intermediary structure blocks the harmful continuous path without compromising the functional electrical connections through the light emitting structures.
2Reliability
If a blocking structure is added to improve water and oxygen blocking, then packaging performance is improved, but device complexity increases
Solution Approach 1:
The blocking structure serves multiple functions simultaneously: it acts as a barrier to moisture and oxygen infiltration, defines the boundaries of cathode regions, and provides structural support for the packaging layer. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The blocking structure is integrated with the packaging layer and cathode layer formation processes, combining multiple structural elements into a unified design. The blocking structure merges the functions of moisture barrier, cathode region definition, and packaging support into a single integrated component.
Data Source
AI summary
A display panel is provided, which includes a substrate, multiple light emitting structures arranged in an array on the substrate, a blocking structure at least arranged in a peripheral region of the substrate, and a cathode layer arranged on the multiple light emitting structures and the blocking structure. The cathode layer is discontinuous at a location corresponding to the blocking structure.