Flexible Display Back Panel Structure for Bend-Area Stiffness
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Solution Overview
Problem
Flexible display products with thin back panels suffer from stiffness issues, leading to collapse and potential cracking or breakage at bending areas due to insufficient structural support.
Innovation Solution
A display module design featuring a back panel with a first part and a second part, where the second part is stiffer than the first part, and is positioned closer to the bending area, with a thickness twice that of the first part, and optionally using different materials like PET or polyurethane for enhanced stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the back panel is thinned to improve bending performance, then the flexibility and bending performance are improved, but the stiffness of the back panel decreases, causing collapse at end portions near the bending area
Solution Approach 1:
The back panel is designed with non-uniform thickness: the first portion (远离 bending area) has a first thickness, while the second portion (near bending area) has a second thickness greater than the first thickness. This local variation in thickness provides different stiffness characteristics in different regions, allowing the back panel to maintain flexibility in the bending area while providing sufficient stiffness support near the bending area to prevent collapse.
2Ease of operation
If the back panel is thinned to improve bending performance, then the flexibility is improved, but the display panel may crack or break due to insufficient support
Solution Approach 1:
By making the second portion of the back panel thicker than the first portion, the design provides localized reinforcement exactly where needed (near the bending area) to prevent collapse and protect the display panel from cracking or breaking, while maintaining overall flexibility for bending operations.
3Strength
If the thickness of the back panel is increased to improve stiffness, then the structural support is improved, but the bending performance deteriorates
Solution Approach 1:
Instead of uniformly increasing the thickness of the entire back panel, the design applies increased thickness (second thickness > first thickness) only to the second portion near the bending area. This localized approach provides the necessary stiffness support without compromising the overall bending performance of the display module.
Solution Approach 2:
The back panel is divided into at least two portions (first portion and second portion) with different thickness characteristics. This segmentation allows each portion to serve its specific function: the thinner first portion allows flexibility, while the thicker second portion provides structural support.
Data Source
AI summary
The present disclosure disclosures a display module and a manufacturing method therefor. The display module includes a bending area, a display panel, and a back panel disposed on a side of the display panel. The back panel includes a substrate. The substrate includes a first part and a second part. The second part is disposed closer to the bending area of the display module than the first part. Stiffness of the second part is greater than stiffness of the first part.