Reinforcing Member in Display Module Notch for Stress Distribution
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Solution Overview
Problem
The insufficient support force and stress concentration near the bending portion of organic light-emitting display devices lead to panel collapse and film layer cracks, reducing the reliability of the display devices.
Innovation Solution
A display module with a reinforcing member placed between the backplate and second support layers, positioned at least partially within the notch formed by the internal shrinkage of the support layers, providing additional support and distributing stress evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the buffer layer is set inwardly to allow bonding process, then the bonding process can be completed, but the support force becomes insufficient and stress becomes concentrated
Solution Approach 1:
The first support layer acts as an intermediary component between the backplate layer and the second support layer. It provides additional structural support in the notch region where the buffer layer is set inwardly, distributing stress and preventing panel collapse while allowing the bonding process to proceed
Solution Approach 2:
The first support layer is strategically positioned to extend to the end of the bending portion, providing localized reinforcement exactly where the notch creates support deficiency. This local quality enhancement addresses the specific weakness without requiring overall structural changes
2Ease of manufacture
If the buffer layer is set inwardly to allow bonding process, then the bonding process can be completed, but stress becomes concentrated
Solution Approach 1:
The first support layer serves as a stress-distributing intermediary in the notch region. It transfers and disperses the concentrated stress that would otherwise be focused at the notch location, reducing peak stress values while maintaining the inward-set buffer layer configuration for bonding
Solution Approach 2:
The invention creates a composite support structure by combining the backplate layer, first support layer, and second support layer. This multi-layer composite configuration in the notch region provides enhanced stress distribution capabilities compared to single-layer structures
3Ease of manufacture
If the support layer is set inwardly, then the bonding process can be completed, but the panel collapses above the notch
Solution Approach 1:
The first support layer acts as a structural intermediary that bridges the gap created by the inward-set buffer layer. It provides continuous support across the notch region, preventing the panel from collapsing into the notch while allowing the bonding process to access the buffer layer edges
4Ease of manufacture
If the support layer is set inwardly, then the bonding process can be completed, but cracks form in the film layer
Solution Approach 1:
The first support layer serves as a protective intermediary structure above the notch. It prevents stress concentration from transmitting to the film layers (such as the trace layer), thereby preventing crack formation while allowing the bonding process to proceed with the inward-set buffer layer
Solution Approach 2:
The first support layer provides beforehand cushioning protection to the film layers in the notch region. By being in place before the bonding process and panel assembly, it cushions against the stress concentrations that would otherwise cause film layer cracks during subsequent handling and operation
Data Source
AI summary
An embodiment of the present application discloses a display module and a display device. The display module includes a display panel, a backplate layer, a first support layer, a second support layer, and a reinforcing member; wherein an end of the first support layer toward a bending portion is shrunk internally relative to an end of the backplate layer and the second support layer toward the bending portion to form a notch, and the reinforcing member is disposed at least partially within the notch. The present application can solve a problem that a support force is insufficient due to the notch, a stress is relatively concentrated, and the display panel collapses.