Flexible Display Mirror Stack With Support Layer Flatness Control
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Solution Overview
Problem
The existing display modules suffer from surface deformation and wrinkles in the mirror structure layer due to low elastic modulus of the polarizer and flexible display panel, leading to orange peel patterns and compromised mirror effect.
Innovation Solution
Incorporating a transparent support layer with a higher elastic modulus than the polarizer and adhesive layers to stabilize the mirror structure layer, preventing deformation and maintaining a flat surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display panel with low elastic modulus is used, then flexibility and bendability are improved, but surface deformation and wrinkles occur in the mirror structure layer
Solution Approach 1:
A transparent support layer with higher elastic modulus is introduced as an intermediary between the flexible display panel and the mirror structure layer. This support layer acts as a mediator that provides mechanical stability to prevent wrinkles while maintaining the overall flexibility of the display module through its adhesive bonding to the flexible panel.
Solution Approach 2:
The display module employs a composite structure combining multiple materials with different elastic moduli: the flexible display panel (low elastic modulus) for bendability, the transparent support layer (high elastic modulus) for stability, and adhesive layers for bonding. This composite material approach allows the system to simultaneously achieve flexibility and surface stability.
2Ease of manufacture
If the polarizer with low elastic modulus is used, then ease of manufacture is improved, but orange peel patterns and mirror effect deterioration occur
Solution Approach 1:
The transparent support layer serves as a mediator between the low elastic modulus polarizer and the mirror structure layer. It provides the necessary mechanical support to maintain surface flatness and prevent orange peel patterns, while the polarizer can still be easily manufactured with low elastic modulus properties.
Solution Approach 2:
The elastic modulus parameter is strategically varied across different layers: the polarizer maintains low elastic modulus for ease of manufacture, while the transparent support layer has high elastic modulus to ensure surface flatness and prevent defects in the mirror structure layer.
3Adaptability or versatility
If adhesive layers with low elastic modulus are used, then bonding flexibility is improved, but deformation propagates to the mirror structure layer
Solution Approach 1:
The transparent support layer acts as a mechanical intermediary that blocks the propagation of deformation from the low elastic modulus adhesive layers to the mirror structure layer. It provides structural support strength while allowing the adhesive layers to maintain their bonding flexibility.
Solution Approach 2:
The multi-layer composite structure combines adhesive layers with low elastic modulus for bonding flexibility with a transparent support layer of high elastic modulus for structural support. This material differentiation allows each layer to perform its optimal function without compromising the other.
Data Source
AI summary
A display module is disclosed. The display module includes a flexible display panel, a polarizer, a transparent support layer and a mirror structure layer. The polarizer is located on a display surface of the flexible display panel. The transparent support layer is located on a side of the polarizer away from the flexible display panel. The mirror structure layer is located on a side of the transparent support layer away from the polarizer. An elastic modulus of the transparent support layer is greater than an elastic modulus of the polarizer.