Tape Spring Drum Structure to Prevent Rollable Display Slip
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Solution Overview
Problem
Existing rollable display devices experience gaps and slip phenomena due to the movement of tape springs, which affect the stability and quality of the display unit.
Innovation Solution
Incorporating a corrugate spring between the tape spring drum and case to press the tape spring toward the drum, ensuring consistent tension and contact, thereby suppressing gaps and slip between wound tape springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tape spring is used to vertically move the display unit, then the display unit can be lifted and lowered, but gaps and slip phenomena occur between wound tape springs affecting stability
Solution Approach 1:
A corrugate spring is introduced as an intermediary component between the tape spring and the tape spring drum. The corrugate spring presses the tape spring against the drum surface, ensuring consistent contact and preventing slip phenomena. This mediator resolves the contradiction by maintaining reliable engagement while preserving the lifting function.
Solution Approach 2:
The corrugate spring features a curved, wave-like structure that allows it to flex and maintain constant pressure on the tape spring as it winds and unwinds. The curvature enables the spring to adapt to the changing radius of the wound tape spring, ensuring continuous contact and eliminating gaps that cause instability.
2Reliability
If the tape spring is wound tightly to eliminate gaps, then stability improves, but the tape spring slips on the drum
Solution Approach 1:
The corrugate spring serves as a mediator that applies controlled pressure between the tape spring and drum. It creates sufficient friction to prevent slipping while maintaining tight winding to eliminate gaps, thus resolving the contradiction between preventing slips and maintaining stability.
Solution Approach 2:
The corrugate spring changes the pressure parameter applied to the tape spring dynamically. As the tape spring winds and unwinds, the corrugate spring adjusts its compression force to maintain optimal contact pressure, preventing both gaps and slips by modulating the pressing force.
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
Stabilizes the lifting and lowering of the display unit, improving the overall quality and performance of the display device by preventing gaps and slip phenomena.
Implementation Method 1
a corrugate spring between the tape spring drum and the tape spring case and configured to press the tape spring toward the tape spring drum
Data Source
AI summary
According to an aspect of the present disclosure, a display device includes: a display unit including a display panel in which an image is displayed; a first roller configured to wind or unwind the display unit; a tape spring which vertically moves the display unit on a rear surface of the display unit; and a second roller configured to wind or unwind the tape spring, the second roller includes: a tape spring drum to which one end of the tape spring is fixed and configured to wind or unwind the tape spring; a tape spring case accommodating the tape spring drum and the tape spring; and a corrugate spring between the tape spring drum and the tape spring case and configured to press the tape spring toward the tape spring drum. Therefore, a slip phenomenon of the tape spring may be improved.