Flexible Display Organic Inorganic Encapsulation Crack Resistance
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Solution Overview
Problem
Existing flexible display panels face a reduction in service life due to cracks in the inorganic encapsulation structure caused by bending stress, which allows water vapor and oxygen to enter, shortening the lifespan of light emitting devices.
Innovation Solution
A flexible display panel design featuring an organic encapsulation layer covering the inorganic encapsulation structure in non-display regions, with a barrier layer preventing diffusion and absorbing bending stress, and integrated with a stacked encapsulation structure to reduce crack formation and maintain panel flatness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inorganic encapsulation structure is used in non-display regions, then water vapor and oxygen prevention is improved, but crack formation under bending stress increases
Solution Approach 1:
The patent uses a composite encapsulation structure combining inorganic encapsulation layers (for barrier performance) with organic encapsulation layers (for flexibility and crack resistance). The organic layer covers the inorganic layer in non-display regions, creating a composite structure that leverages the advantages of both materials: the inorganic layer provides excellent water vapor and oxygen prevention, while the organic layer provides flexibility and absorbs bending stress to prevent cracks.
2Reliability
If a stacked encapsulation structure is used in display regions, then encapsulation performance is improved, but device complexity increases
Solution Approach 1:
The patent applies different encapsulation structures to different regions of the display panel based on local requirements. In display regions where high encapsulation performance is critical, a stacked encapsulation structure (multiple inorganic layers with organic layers in between) is used. In non-display regions where flexibility is more important, a simpler single inorganic layer covered by an organic layer is used. This localized approach optimizes encapsulation performance where needed while reducing overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The organic encapsulation layer effectively absorbs bending stress, reducing the likelihood of cracks in the inorganic encapsulation structure, thereby extending the service life of light emitting devices and preventing water vapor and oxygen ingress.
Implementation Method 1
the organic encapsulation layer effectively absorbs bending stress
Implementation Method 2
a first barrier layer configured to prevent a diffusion of the organic encapsulation layer
Data Source
AI summary
A flexible display panel, a manufacturing method thereof and a flexible display device, which relate to the technical field of flexible display and reduce the probability of the occurrence of cracks on an inorganic encapsulation structure when a flexible display panel is bent, so that the service life of light emitting devices in the flexible display substrate is prolonged. The flexible display panel includes a flexible display substrate and an encapsulation structure arranged on a surface of the flexible display substrate. A portion of the encapsulation structure corresponding to a non-display region is an inorganic encapsulation structure. The flexible display panel further includes an organic encapsulation layer covering the inorganic encapsulation structure. The manufacturing method of a flexible display panel manufacture the flexible display panel described in the above technical solutions. The flexible display panel provided by the present disclosure is used in a flexible display device.