Foldable Display Assembly With Rigid Cover to Prevent Adhesive Cracking
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Solution Overview
Problem
Foldable display screens with curved-surface designs experience cracking issues due to rebound forces after long-term attachment, affecting the assembly integrity of the display module and support layer.
Innovation Solution
A foldable display screen assembly is designed with a flexible display module, a flexible support layer, and a rigid protective structure, where the rigid protective structure has a higher elastic modulus than the flexible support layer to offset rebound forces, preventing adhesive cracking and ensuring mechanical balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible materials are used for the display module and support layer to enable bending, then the foldable display screen can be bent, but strong rebound force occurs after curved-surface attaching which causes adhesive cracking
Solution Approach 1:
The patent introduces a rigid protective structure with different elastic modulus parameters compared to the flexible materials. This rigid structure has higher elastic modulus to counteract the rebound force generated by the flexible materials during bending, thereby preventing adhesive cracking while maintaining bending capability
Solution Approach 2:
The patent combines flexible materials (display module and support layer) with a rigid protective structure to form a composite assembly. This composite structure leverages the flexibility of the display components for bending while the rigid protective structure provides mechanical support to prevent adhesive failure from rebound forces
2Reliability
If rigid protective structure is added to offset rebound force, then adhesive cracking is prevented, but device complexity increases
Solution Approach 1:
The rigid protective structure is designed as a thin film or shell-like component that can be integrated with the flexible display module and support layer. This thin-structure approach provides the necessary mechanical support to prevent adhesive cracking while minimizing the increase in overall device complexity and maintaining flexibility
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 rigid protective structure maintains the integrity of the foldable display screen assembly by offsetting rebound forces, preventing adhesive cracking and ensuring a stable assembly process.
Implementation Method 1
an elastic modulus of the rigid protective structure is greater than an elastic modulus of the flexible support layer
Data Source
AI summary
A foldable display screen assembly has a flat area and a curved-surface area. The foldable display screen assembly includes a flexible display module including a flat display portion and a curved-surface display portion. The flexible display module has a display surface and a back surface opposite the display surface. The foldable display screen assembly further includes a flexible support layer attached to the back surface of the flexible display module by an adhesive. The flexible support layer includes a flat support portion and a curved-surface support portion. The foldable display screen assembly further includes a rigid protective structure attached to the display surface of the flexible display module. The rigid protective structure includes a flat protective portion and a curved-surface protective portion. The elastic modulus of the rigid protective structure is greater than the elastic modulus of the flexible support layer.