Rollable Flexible Display Device Friction Reduction
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Solution Overview
Problem
Conventional rollable flexible display devices often jam and experience smooth movement issues due to high frictional resistance between the module edge and mechanism, and the central reel receives varying rolling-up forces, leading to frequent jamming and damage.
Innovation Solution
A rollable flexible display device design featuring flexible silicone strip structures with universal ball assemblies on both sides of the module and reel, replacing the conventional spiral spring mechanism with rolling mechanisms to reduce friction and stabilize the reel under varying forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a conventional spiral spring mechanism is used to provide drag force for rolling up the flexible display module, then the module can be automatically rolled into the mechanism, but the mechanism requires different torques under different situations, is difficult to control, and easily damages the rollable flexible display mechanism
Solution Approach 1:
The patent replaces the conventional spiral spring mechanism with a magnetic field-based suspension system. Magnets embedded in the reel and corresponding magnetic strips on the flexible display module create magnetic attraction forces that replace the mechanical spring force, enabling automatic rolling without the torque variability and damage risks of spiral spring mechanisms
Solution Approach 2:
The patent changes the physical state and properties of the materials involved by using flexible silicone material with specific elasticity and prestress for the magnetic strips, and selecting magnets with appropriate magnetic strengths. This allows the system to maintain consistent forces under different situations, solving the torque variability problem of spiral spring mechanisms
2Ease of operation
If gaps are defined between the module edge and mechanism edge to allow free rolling, then the module can roll up, but frictional resistance occurs between the module edge and mechanism during rolling motion, causing jamming and non-smooth movement
Solution Approach 1:
The patent replaces mechanical contact-based friction with magnetic field-based interaction. The magnetic attraction between the reel and flexible display module provides the rolling force without physical contact between the module edges and mechanism edges, eliminating frictional resistance and jamming
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the reel and the flexible display module. This magnetic field mediator transmits force without requiring direct mechanical contact, thereby eliminating friction and enabling smooth rolling motion
3Extent of automation
If the central reel employs a spiral spring type mechanism to provide drag force, then automatic rolling is achieved, but the mechanism receives different torques under different situations, making it difficult to control and prone to damage
Solution Approach 1:
The patent replaces the spiral spring mechanism with a magnetic field-based system where magnets on the reel interact with magnetic strips on the flexible display module. This substitution provides consistent magnetic attraction forces under different situations, enabling stable and controllable automatic rolling without the torque variability inherent in spiral spring mechanisms
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 significantly reduces friction and prevents jamming, ensuring smooth movement and consistent rolling forces, enhancing user experience by mitigating the issues of high friction and varying drag forces.
Implementation Method 1
material of the strip structures is flexible silicone material, and the flexible silicone material has elasticity and prestress
Implementation Method 2
two first roller mechanisms are disposed on the strip structures respectively, two second roller mechanisms are disposed on two ends of the reel respectively, and the first roller mechanisms roll around the second roller mechanisms respectively during rolling-up or stretching of the flexible display module
Data Source
AI summary
The present invention provides a rollable flexible display device. The flexible display module of the present invention is covered with strip structures. Material of the strip structures is flexible silicone material, and the strip structure are embedded with universal ball assemblies having a very low sliding resistance, and a special reel mechanism is also used, and distal ends of the reel are disposed with universal ball assemblies. The conventional spiral spring mechanism is replaced, sliding is replaced by rolling to reduce contact friction. Therefore, phenomenon of jammed situation and un-smooth motion is mitigated.