Hollow Support Plate for Folding Display Bending Area
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Solution Overview
Problem
Folding display devices with a two-layer support structure face issues of poor flatness and increased thickness due to the poor ductility of metal plates and step differences in the support structure, which can lead to delamination and cracking of the display panel.
Innovation Solution
A support plate with an extensible hollow structure is used to support the display panel, featuring a network of strip-shaped solid bodies and arc-shaped edges that provide ductility and reduce the squeezing force on the panel during bending, while maintaining flatness and reducing overall thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thin metal plate is used to support the flexible display panel, then the support structure provides rigidity, but the metal plate has poor ductility and squeezes the display panel during bending
Solution Approach 1:
The patent employs a hollow support plate with porous internal structure instead of a solid metal plate. The hollow structure reduces material density while maintaining support function, and crucially allows the plate to deform without squeezing the display panel during bending, eliminating the delamination risk associated with rigid metal plates.
Solution Approach 2:
The support plate is constructed as a composite structure combining hollow geometry with solid material properties. This composite approach provides both the rigidity needed for support and the ductility required for bending, resolving the contradiction between strength and reliability.
2Adaptability or versatility
If a two-segment support plate is used to enable bending, then bendability is achieved through a gap, but a step difference occurs in the middle bending area causing poor flatness
Solution Approach 1:
The support plate incorporates hollow segments within a continuous structure. These internal hollow segments allow the plate to bend smoothly without requiring external gaps or joints, thereby maintaining both bendability and surface flatness simultaneously.
Solution Approach 2:
The bending capability is achieved by introducing internal hollow voids in three-dimensional space rather than creating surface gaps. This dimensional approach allows the plate to flex while maintaining a flat external surface, resolving the flatness issue.
3Reliability
If a two-layer support structure with thin metal plate and support plate is used, then the flexible display panel is supported, but the overall thickness of the folding display device becomes larger
Solution Approach 1:
The patent merges the support plate and display panel into a closely integrated structure where the hollow support plate directly underlies the display panel. This integration eliminates the need for separate thick support layers, reducing overall device thickness while maintaining support reliability.
Solution Approach 2:
The hollow support plate provides structural support with reduced material volume. The porous internal structure achieves the same support function as a solid plate would, but with significantly less thickness, thereby reducing overall device dimensions.
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 solution improves the deformability and extensibility of the bending area, reducing the risk of delamination and cracking, and achieves a thinner, flatter display device with reduced interlayer stress.
Implementation Method 1
the bending area has an extensible hollow structure... By arranging a hollow structure with ductility in the bending area, deformability and extensibility of the bending area are improved
Implementation Method 2
squeezing force that the display panel bears during bending and flattening process of the folding display device is reduced. This reduces a risk of delamination or cracking between layers
Data Source
AI summary
A folding display device includes a display panel and a support plate configured to support the display panel. The display panel includes a flexible display area. A bending area corresponding to the flexible display area is provided on the support plate, and an extensible hollow structure is provided in the bending area. By providing the hollow structure, deformability and extensibility of the bending area are improved, and a risk of peeling or cracking between layers of the display device is reduced.