Composite Support Layer for Flexible Display Weight Reduction
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Solution Overview
Problem
Flexible display screens face challenges in reducing weight while maintaining support and flexibility, as traditional metal support materials account for a significant portion of the device's weight and hinder size increases due to added components.
Innovation Solution
A composite support layer is introduced, comprising a rigid polymethyl methacrylate sub-layer and a flexible polycarbonate sub-layer, sequentially laminated to provide structural support and flexibility, with openings in the bending region to enhance bending performance and light transmittance, and metal or light-shielding films for added functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal support material is used in flexible display screens, then structural support strength is improved, but device weight increases significantly
Solution Approach 1:
The patent uses a composite support layer comprising a rigid support sub-layer (providing structural strength) and a flexible support sub-layer (providing flexibility), where the rigid sub-layer has higher elastic modulus than the flexible sub-layer. This composite structure replaces traditional metal support materials, achieving both structural support and weight reduction goals while enabling flexible display functionality.
2Adaptability or versatility
If screen size is increased and new display components are added, then display function diversity is improved, but device weight increases
Solution Approach 1:
The composite support layer with differentiated sub-layers provides a lightweight yet functional foundation that accommodates diversified display components and increased screen sizes without proportionally increasing weight, as the polymer-based composite is significantly lighter than traditional metal supports.
Solution Approach 2:
The support layer has different properties in different regions: the rigid support sub-layer provides structural strength where needed, while the flexible support sub-layer provides flexibility, and openings are strategically positioned in bending regions. This localized differentiation allows the structure to support diverse components while maintaining overall lightness.
3Illumination intensity
If openings are added in bending regions, then flexibility and light transmittance are improved, but structural strength decreases
Solution Approach 1:
Openings are specifically positioned in bending regions where flexibility is needed, while the rigid and flexible support sub-layers maintain structural integrity in non-bending areas. This localized opening strategy allows flexibility and light transmittance improvement without compromising overall structural strength.
Solution Approach 2:
The composite structure with rigid and flexible sub-layers compensates for the strength reduction caused by openings. The rigid sub-layer provides structural support while the flexible sub-layer accommodates bending, allowing openings to be added for flexibility and light transmittance without significant strength loss.
Data Source
AI summary
Disclosed in the present application is a display device. The display device includes a display panel, a backplate, and a composite support layer; the backplate is disposed on one side of the display panel; the composite support layer is disposed on one side of the backplate away from the display panel, the composite support layer includes a rigid support sub-layer and a flexible support sub-layer which are sequentially laminated; wherein a material of the rigid support sub-layer comprises polymethyl methacrylate, and a material of the flexible support sub-layer comprises polycarbonate.