Rollable Display Tension Adjustment for Wrinkle-Free Screen Retraction
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Solution Overview
Problem
Current rollable display devices suffer from uncontrollable tension during retracting and unwinding, leading to issues such as wrinkles and abnormalities due to either insufficient or excessive tension, which deteriorates user experience.
Innovation Solution
A tension adjustment device with adjustable members and a driving mechanism, including an adjusting gear and a driving gear, allows for precise control of tension by sliding adjustment members closer or farther from a body, using a drive motor and detection device to maintain optimal tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If spring forces of torsion springs are used to realize retracting and unwinding of scroll screens, then the scroll screens can be retracted and unwound, but uncontrollable tension occurs causing wrinkles and abnormalities
Solution Approach 1:
The patent applies dynamics by making the tension force adjustable rather than fixed. The adjustment member can be positioned at different locations around the retraction wheel, changing the tension arm length and thus the tension force dynamically. This resolves the contradiction by allowing the system to adapt tension levels to prevent wrinkles while maintaining the retracting function.
Solution Approach 2:
The patent changes the parameter of tension force by allowing the adjustment member to be positioned at different angular positions around the retraction wheel. This parameter change enables precise control over the tension applied to the flexible display screen, preventing both excessive tension (wrinkles) and insufficient tension (looseness).
2Stability of the object's composition
If tension is increased to prevent loose and collapsed screens, then screen stability improves, but the screen may be stretched and broken
Solution Approach 1:
The patent uses parameter changes by adjusting the tension arm length through different positions of the adjustment member on the retraction wheel. This allows precise control of tension force within an optimal range, providing enough tension for screen stability while avoiding excessive tension that could cause stretching or breaking.
Solution Approach 2:
The patent implements feedback by allowing manual adjustment of the tension force based on observed screen behavior. The adjustment member can be repositioned to fine-tune the tension, creating a feedback loop where the operator can respond to screen conditions and optimize tension levels to prevent both loosening and over-tensioning.
3Device complexity
If torsion spring device is used for retracting and unwinding, then the function is simple, but aging causes tension reduction and slipping
Solution Approach 1:
The patent applies dynamics by replacing the fixed spring mechanism with an adjustable tension system. The adjustment member can be repositioned around the retraction wheel to compensate for aging effects, maintaining consistent tension over time. This dynamic adjustment capability resolves the reliability issue while keeping the overall device structure relatively simple.
Solution Approach 2:
The patent implements self-service by enabling the user to manually adjust the tension force when needed. This self-adjustment capability allows the device to compensate for its own aging without requiring replacement of the entire spring mechanism, maintaining reliability while preserving device simplicity.
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
Prevents wrinkles and abnormalities by adjusting tension to optimal levels, preventing loose or broken screens, thereby enhancing user experience by maintaining consistent performance over time.
Implementation Method 1
a driving device driving the at least two adjustment members to be close to or away from the body
Data Source
AI summary
A tension adjustment device and a rollable display device are disclosed. The tension adjustment device includes a body, at least two adjustment members, and a driving device. The driving device drives the at least two adjustment members to be close to or away from the body to retract or expand the tension adjustment device, so a degree of tension of a rolled product can be adjusted.