Flexible Display Panel Encapsulation for Sliding Strain Relief
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Solution Overview
Problem
In sliding and rolling display technologies, flexible display panels face challenges in maintaining flatness and preventing encapsulation failures, which lead to moisture and oxygen invasion, causing peeling of the light-emitting layer and display failures.
Innovation Solution
A flexible display panel design with a base substrate covering the display and bezel areas, and inorganic insulating layers with reduced thickness or number of layers in the sliding and rolling connection area, to minimize strain and prevent encapsulation failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inorganic insulating layers are made thicker to improve encapsulation and prevent moisture/oxygen invasion, then the reliability of the display panel improves, but the strain in the sliding and rolling connection area increases causing encapsulation failures and peeling
Solution Approach 1:
The patent applies different thickness configurations of inorganic insulating layers to different regions of the display panel. Specifically, the sliding and rolling connection area has a reduced number of inorganic insulating layer layers or reduced total thickness compared to the display area, optimizing the balance between encapsulation protection and strain resistance in different functional zones.
2Ease of manufacture
If the display panel structure is simplified to ease manufacturing, then the ease of manufacture improves, but the protection against moisture and oxygen invasion deteriorates
Solution Approach 1:
The patent implements a region-specific encapsulation strategy where the display area maintains multiple inorganic insulating layers for robust moisture and oxygen barrier protection, while the sliding and rolling connection area uses fewer layers or reduced thickness to accommodate mechanical strain, achieving both manufacturing feasibility and effective protection.
3Stability of the object's composition
If the inorganic insulating layers are reduced in the sliding and rolling connection area to prevent encapsulation failures, then the strain resistance improves, but the encapsulation capability deteriorates
Solution Approach 1:
The patent strategically configures the inorganic insulating layers with reduced number of layers or reduced total thickness specifically in the sliding and rolling connection area to maintain encapsulation stability under mechanical strain, while preserving adequate protection capability in this critical region through optimized local structure design.
Data Source
AI summary
A flexible display panel has a display area, a bezel area disposed around the display area and a sliding and rolling connection area connected to a first border of the bezel area away from the display area. The flexible display panel includes a base substrate covering at least the display area and the bezel area and one or more inorganic insulating layers located on a side of the base substrate. A total thickness of a portion of the one or more inorganic insulating layers located in the sliding and rolling connection area is less than a total thickness of a portion of the one or more inorganic insulating layers located in the display area.