Flexible Display Panel Buffer Openings Stress Relief
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Solution Overview
Problem
Flexible display panels face issues with warping, cracking, and deformation due to internal stress when bent, leading to reduced service life and poor impact resistance, especially under external forces.
Innovation Solution
A flexible display panel design featuring a support layer with piezoelectric film and buffer openings that buffer internal stress, combined with an electrostatic protective layer and a bonding layer, allowing the panel to vibrate and provide tactile feedback while enhancing impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display panel is bent to achieve portability and large-screen display, then the portability and display capability are improved, but internal stress accumulates causing warping, cracking, and deformation
Solution Approach 1:
The support layer is divided into multiple regions: rigid support regions that maintain structural integrity and flexible bending regions that accommodate curvature. This segmentation allows the display panel to bend without accumulating excessive internal stress, resolving the contradiction between portability and reliability
Solution Approach 2:
Different regions of the support layer are designed with different mechanical properties - some areas are made more rigid to prevent deformation while other areas are made more flexible to accommodate bending. This local differentiation allows the panel to maintain overall stability while enabling controlled bending for portability
2Ease of manufacture
If the flexible display panel structure is simplified to reduce manufacturing complexity, then the ease of manufacture is improved, but impact resistance and protection against warping and cracking are reduced
Solution Approach 1:
The display panel employs a composite structure consisting of multiple layers including display layers, support layers, and protective layers. Each layer contributes specific properties - the support layer provides structural strength and impact resistance, while the protective layers add durability. This composite approach enhances strength without significantly complicating manufacturing
Solution Approach 2:
The support layer is designed with inherent cushioning characteristics that absorb and distribute impact forces before they can cause damage to the display layers. This pre-engineered protection reduces the need for additional complex protective structures, maintaining ease of manufacture while improving impact resistance
3Reliability
If buffer openings are added to the support layer to buffer internal stress, then the service life is improved, but the device complexity increases
Solution Approach 1:
The support layer incorporates buffer openings that create a porous structure, allowing the layer to expand and contract during bending without generating excessive internal stress. These openings act as stress relief channels, significantly improving service life while adding minimal structural complexity since the openings can be integrated into the existing support layer manufacturing process
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 design reduces the probability of warping or cracking, prolongs the service life, and improves impact resistance, enabling effective sound production and tactile feedback while maintaining portability and large-screen display capabilities.
Implementation Method 1
The support layer includes a piezoelectric film layer, and the piezoelectric film layer drives the display layer to vibrate when being deformed
Implementation Method 2
the support layer and/or the bonding layer includes buffer openings, and the buffer openings are positioned to at least correspond to the bending part... an internal stress of the flexible display panel may be buffered through the buffer openings
Implementation Method 3
the bonding layer is bonded between the display layer and the support layer
Data Source
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AI summary
The present application relates to a flexible display panel and an electronic device. The flexible display panel has an unbent state and a bent state, and when the flexible display panel is in the bent state, a bending part of the flexible display panel is bent. The flexible display panel includes a display layer, a bonding layer and a support layer. The bonding layer is bonded between the display layer and the support layer, the support layer and/or the bonding layer includes buffer openings, and the buffer openings are positioned to at least correspond to the bending part.