Rollable Display Cable Twist Suppression via Segmented Extension
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Solution Overview
Problem
Rollable display devices face challenges in minimizing twist and ensuring stable winding/unwinding of flexible cables, which can lead to stress, slippage, and potential damage during the rolling process, affecting the reliability and stability of the display.
Innovation Solution
Incorporating a flexible cable with an extension part that winds around the roller and an elastic member, along with a cable cover and guide member, to manage the twisting and unwinding process, reducing stress and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the flexible cable is wound around the roller during rolling of the display panel, then the display device can be compacted, but the flexible cable experiences twist and stress that may lead to damage
Solution Approach 1:
The flexible cable is divided into two functional segments: a connection part that remains fixed to the display panel, and an extension part that is wound around the roller. This segmentation allows the cable to accommodate the rolling motion without twisting, as only the extension part undergoes deformation while the connection part maintains stable electrical connectivity.
Solution Approach 2:
The roller acts as an intermediary component between the display panel and the flexible cable. It provides a dedicated winding surface for the extension part, guiding the cable through the rolling process and preventing direct twisting of the connection part. The roller mediates the mechanical stress by distributing it along the extension part's length.
2Stability of the object's composition
If the flexible cable is fixed securely to prevent movement, then stability is improved, but the cable cannot be easily unwound or adjusted
Solution Approach 1:
The flexible cable system transitions from a static fixed connection to a dynamic configuration where the extension part can freely wind and unwind around the roller. The connection part remains fixed to maintain stability, while the extension part adapts its position dynamically during rolling and unrolling operations, enabling both stability and operational flexibility.
3Adaptability or versatility
If the flexible cable is made longer to allow winding around the roller, then the rolling function is enabled, but the cable becomes more prone to twisting and stress concentration
Solution Approach 1:
Different portions of the flexible cable are assigned different functional qualities: the connection part is designed for stable electrical connection with minimal movement, while the extension part is designed to accommodate winding and unwinding motions. This local differentiation of cable properties allows the system to achieve rolling functionality while concentrating the mechanical stress only in the extension part, which is designed to handle such stresses.
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 effectively suppresses twist in the flexible cable, stabilizes the winding/unwinding process, and improves the reliability and durability of the display device by minimizing stress and preventing damage.
Implementation Method 1
an elastic member placed on at least one surface of the extension part
Data Source
AI summary
A display device includes a display panel, a roller configured to wind or unwind the display panel, a flexible cable configured to transmit an electrical signal to the display panel and including an extension part to be wound around the end of the roller.