Flexible Display Reel Mechanism for Peeling Prevention
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Solution Overview
Problem
The existing curling technology for flexible display panels is limited by partial peeling due to increased curling thickness and differences in film stresses between inner and outer layers, restricting the application of curling displays.
Innovation Solution
A display device with two reels, one at each end of the flexible display screen, that rotate to curl and uncurl the screen simultaneously, assisted by an auxiliary shaft, to manage stress and prevent peeling, driven by a motor and controlled by a circuit board system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reel is used to curl the flexible display screen, then the device structure is simple, but the difference in film stresses between inner and outer panels increases causing partial peeling
Solution Approach 1:
The single reel structure is segmented into two separate reels (first reel and second reel) positioned at opposite ends of the flexible display screen. Each reel independently manages the curling stress at its respective end, dividing the stress management function to prevent the stress concentration and peeling that occurs with a single reel system.
Solution Approach 2:
Different regions of the flexible display screen are treated differently by assigning dedicated reels to each end. The first reel manages stress at one end while the second reel manages stress at the opposite end, allowing localized stress control that prevents the uniform stress distribution problems that lead to peeling in single-reel systems.
2Shape
If the number of curling turns is increased, then the curling diameter is reduced, but the curling thickness increases causing larger film stress differences
Solution Approach 1:
The total curling turns are segmented between two reels at opposite ends of the flexible display screen. Instead of all turns concentrating at one location, the turns are distributed across both reels, which reduces the cumulative thickness and stress difference at any single point while maintaining the desired small curling diameter.
Data Source
AI summary
The present invention provides a display device, wherein by arranging reels at opposite ends of the flexible display screen, a difference in curling lengths between laminated films of the flexible display screen caused by an increase in a number of curling turns during curling can be effectively relieved. In addition, one end of the inner roll can reduce the stress generated at one end of the outer roll, thereby preventing the layers from falling off, which is beneficial to increase the service life of the flexible display screen.