Rollable Display Bidirectional Stretching Mechanism

The single rotating shaft is divided into two separate rotating shafts (first rotating shaft and second rotating shaft). This segmentation allows the flexible screen to be rolled up on both shafts simultaneously, increasing the rolled-up radius and preventing the screen from being squeezed against a single fixed opening, thereby resolving the contradiction between structural simplicity and damage prevention.

The patent transitions from a one-dimensional rolling mechanism (single shaft) to a two-dimensional rolling mechanism (dual shafts arranged in specific spatial configuration). This dimensional change increases the effective rolled-up radius and provides additional space for the flexible screen to move during rolling, preventing contact with the shaft openings and eliminating scratches.

The single shaft is segmented into two rotating shafts that can rotate in opposite directions. This segmentation enables bidirectional stretching of the flexible screen during rolling, effectively doubling the rolled-up radius without requiring a single complex oversized shaft, thus improving rolling productivity while keeping structural complexity manageable.

The patent introduces dynamic rotation of the two shafts in opposite directions to create a dynamic rolling mechanism. This dynamic operation allows the flexible screen to be stretched bidirectionally during rolling, increasing the rolled-up radius and improving rolling speed while the shafts themselves remain relatively simple structures.

The patent effectively removes the fixed opening from the shaft structure by using two rotating shafts without fixed openings that protrude into the rolling path. The flexible screen rolls around the shafts without contacting any protruding features, extracting the harmful opening element from the system while maintaining ease of manufacture through standard shaft fabrication.

The two rotating shafts act as intermediary elements that facilitate the rolling process without creating harmful contact points. Instead of fixed openings that directly contact and scratch the screen, the rotating shafts provide a smooth surface for the screen to wrap around, mediating the rolling action while preventing damage.