Flexible Display Roller With Torsion Spring Retraction
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Solution Overview
Problem
Existing scrollable displays require multiple motor systems for rolling and unrolling operations, leading to large size, complex circuit design, and mechanical structure.
Innovation Solution
A scroll device utilizing a torsion spring to provide restoring force for rotating the roller, eliminating the need for separate motor systems and simplifying the mechanical structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a motor system is used to drive roller rotation for curling the display panel, then sufficient torque can be provided for rolling, but the device size increases and mechanical structure becomes complicated
Solution Approach 1:
The patent extracts and eliminates the motor system from the scroll device, replacing it with a torsion spring mechanism. The torsion spring is installed inside the roller to provide the necessary restoring force for curling and uncurling the display panel, thereby removing the complexity of motor-driven rotation while maintaining the required torque through elastic mechanical energy storage.
Solution Approach 2:
The torsion spring provides self-service by automatically generating the restoring force needed for roller rotation. When the display panel is unrolled, the torsion spring twists and stores elastic energy, then automatically releases this energy to drive the roller back to its initial position, eliminating the need for external motor control systems.
2Ease of operation
If two motor systems are used to coordinate roller movement and curling, then precise control is achieved, but the device size and circuit design become more complicated
Solution Approach 1:
The patent merges the functions of roller movement and curling control into a single integrated mechanism. The torsion spring simultaneously provides both the driving force for curling and the restoring force for uncurling, eliminating the need for two separate motor systems and their associated coordination circuits.
Solution Approach 2:
The patent replaces the electrical motor control system with a mechanical torsion spring system. This substitution eliminates complex circuit designs and electronic control coordination, using purely mechanical elastic energy storage and release to achieve the desired coordinated motion.
3Force
If motor systems are installed in the scroll device, then sufficient driving force is provided, but the overall device size increases
Solution Approach 1:
The torsion spring is nested inside the roller structure, utilizing the internal space of the roller to house the elastic element. This nested configuration provides the necessary driving force without increasing the external dimensions of the scroll device, as the spring is contained within the existing roller volume.
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 use of torsion springs reduces the size and complexity of scrollable displays by providing the necessary torque for rolling and unrolling operations, enhancing the compactness and simplicity of the design.
Implementation Method 1
A first torsion spring located inside the roller, and two ends of the first torsion spring are connected to the roller and the first roller end cap separately, where the relative rotation between the roller and the first roller end cap makes the first torsion spring twist
Implementation Method 2
The first torsion spring in the second state deforms to form a first restoring force, and the first restoring force drives the roller to draw the flexible display panel
Data Source
AI summary
A scrollable device including a fixture, a flexible display panel and a scroll device having a roller, a roller end cap and a torsion spring is provided. One side of the flexible display panel is connected to the fixture, while the other side is connected to the cylindrical surface of the roller. The roller end cap is rotatably disposed on the end part of the roller, and the torsion spring is inside the roller. One end of the torsion spring is connected to the roller, while the other end is connected to the roller end cap. When a relative rotation between the roller and the roller end cap is occurred, the torsion spring is rotated and deformed to form a restoring force. This restoring force can drive the roller to rotate relative to the roller end cap, thereby making the flexible display panel to roll up along the roller.