Segmented Support Backplate for Foldable OLED Displays
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Solution Overview
Problem
Conventional support backplates for flexible OLED displays are prone to fatigue and fracture when bent, due to their rigid material composition, which limits their folding performance and resilience.
Innovation Solution
A support backplate design featuring a plurality of support strips arranged at intervals with elastic connection layers, allowing for stress release and reduced deformation, composed of materials like organic silica gel, thermoplastic elastomer, or polyvinyl chloride, which enhances fatigue resistance and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid material is used for the support backplate, then the structural strength is improved, but the fatigue resistance and flexibility deteriorate when bent
Solution Approach 1:
The support backplate is divided into multiple support strips arranged in parallel, connected by elastic connection layers. This segmentation allows each strip to independently bear load while the elastic connections absorb bending stresses, resolving the contradiction between maintaining structural strength and improving fatigue resistance during folding operations.
Solution Approach 2:
The support backplate combines rigid support strips with flexible elastic connection layers to create a composite structure. The rigid strips provide structural strength and support, while the elastic material layers provide flexibility and fatigue resistance, allowing the backplate to withstand repeated bending without fracture.
2Stability of the object's composition
If a rigid support backplate is used, then the support stability is improved, but the adaptability to folding shapes deteriorates
Solution Approach 1:
The support backplate transitions from a static rigid structure to a dynamic semi-flexible structure capable of adapting to different folding configurations. The elastic connection layers enable the support strips to relative move and rotate, allowing the backplate to conform to various shapes while maintaining support stability through the rigid strips.
3Area of stationary object
If the support strips are closely arranged, then the support coverage is improved, but the stress concentration during bending increases
Solution Approach 1:
The elastic connection layers act as intermediaries between adjacent support strips, absorbing and distributing bending stresses. This allows the strips to be closely arranged for maximum support coverage while the elastic material prevents stress concentration at the interfaces between strips during folding.
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 design improves the resilience and fatigue resistance of the support backplate, enabling effective bending and folding of flexible OLED displays by reducing the deformation of support strips and maintaining structural integrity.
Implementation Method 1
a first elastic connection layer disposed on a side of the plurality of support strips in the thickness direction and directly connected to the support strip
Data Source
AI summary
A support backplate includes a plurality of support strips and a first elastic connection layer. The plurality of support strips are arranged at intervals in a first direction, and each support strip of the plurality of support strips extends in a second direction. The first direction is perpendicular to a thickness direction of the support strip, and the second direction is substantially perpendicular to the first direction in a first plane perpendicular to the thickness direction. The first elastic connection layer is disposed on a side of the plurality of support strips in the thickness direction, and the first elastic connection layer is directly connected to the support strip.