Flexible Display Panel Groove Design for Stress Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display panels face significant bending stress issues due to their thickness, leading to cracks and breakage when bent, as existing solutions either concentrate stress or degrade the encapsulation layer, failing to effectively reduce stress while maintaining moisture and oxygen barrier properties.
Innovation Solution
A flexible display panel design featuring a substrate with a thin-film encapsulation layer including organic and inorganic layers, where grooves are formed in the bending areas of the organic encapsulation layer, reducing panel thickness and distributing bending stress, thereby preventing cracking and breakage while maintaining effective encapsulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the flexible display panel is made thicker to maintain structural integrity, then strength is improved, but bending stress increases causing cracks and breakage
Solution Approach 1:
The encapsulation layer is segmented into multiple sub-layers (first encapsulation sub-layer and second encapsulation sub-layer), allowing stress to be distributed across different layers rather than concentrated in a single thick layer, thereby reducing bending stress while maintaining structural integrity
Solution Approach 2:
The encapsulation structure uses composite materials combining organic and inorganic layers (first encapsulation sub-layer with first material, second encapsulation sub-layer with second material), creating a multi-material system that balances flexibility and strength to reduce bending stress
2Stress or pressure
If the encapsulation layer is made thinner to reduce bending stress, then bending stress is reduced, but moisture and oxygen barrier properties deteriorate
Solution Approach 1:
The encapsulation layer is divided into multiple thin sub-layers instead of a single thick layer, reducing the thickness of each individual layer to lower bending stress while maintaining overall encapsulation integrity through the multi-layer structure
Solution Approach 2:
The multi-sub-layer structure combines different materials (organic and inorganic) that provide complementary barrier properties, ensuring effective moisture and oxygen protection even when each individual layer is thin
Data Source
AI summary
A flexible display panel and a display apparatus are provided. The flexible display panel includes a flexible substrate, a first buffer layer disposed on one side of the flexible substrate, a thin-film transistor layer disposed on a side of the first buffer layer away from the flexible substrate, a planarization layer disposed on a side of the thin-film transistor layer away from the flexible substrate, and an organic light-emitting layer disposed on a side of the planarization layer away from the flexible substrate, where the flexible display panel includes at least one bending area, and in the at least one bending area, at least one groove is formed in at least one of the first buffer layer and the thin-film transistor layer, andW≥n180°πR.