Flexible Display Back Plate Multi-Directional Folding Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display devices face issues with repeated folding and unfolding, leading to plastic deformation and stress on the back plate, making it difficult to restore to the original shape and causing durability concerns.
Innovation Solution
A display device design featuring a back plate with strategically arranged holes and a step compensating member, allowing for easy folding and unfolding by adjusting the curvature and stress distribution, while maintaining durability through a combination of materials like polyurethane and thermoplastic polyurethane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is repeatedly folded and unfolded, then the flexibility and control range of shapes are improved, but plastic deformation of the back plate and flexible substrate occur, reducing reliability
Solution Approach 1:
The back plate is divided into multiple folding areas with different folding directions. The first folding area is folded in a first direction while the second folding area is folded in a second direction, creating a multi-directional folding structure that distributes stress and prevents plastic deformation during repeated folding and unfolding operations
Solution Approach 2:
Different regions of the back plate are designed with different folding characteristics. The first folding area and second folding area have distinct folding directions and structural properties, allowing each region to optimally handle the stresses specific to its location and folding pattern, thereby improving overall durability
2Length of moving object
If the back plate is positioned at the bottom of the thin flexible substrate, then the device achieves thinness and flexibility, but high stress is applied to the back plate during folding, worsening its durability
Solution Approach 1:
The back plate is segmented into multiple folding areas that can independently deform in different directions. This segmentation allows the back plate to distribute and reduce stress concentrations during folding operations, maintaining durability despite the thin overall device structure
Solution Approach 2:
The back plate is designed with dynamic folding capabilities, allowing it to adapt its structure during folding and unfolding. The multiple folding areas enable the back plate to dynamically redistribute stresses, preventing permanent deformation while maintaining the thin form factor required for flexible displays
Data Source
AI summary
A display device includes: a display panel; and a back plate on a rear side of the display panel, and including a first folding area configured to be folded in a first direction and a second folding area crossing the first folding area and configured to be folded in a second direction.