Rollable Display Device Rolling Guide Parts Sagging
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Solution Overview
Problem
Conventional rollable display devices face challenges in minimizing sagging of the central portion of the display panel and back cover when wound, and in achieving a lightweight configuration that replaces the heavy roller.
Innovation Solution
The display device incorporates first and second rolling guide parts with protruding or groove portions, a connection part, a back cover seated on the rolling guide parts, and a display panel disposed on the back cover, allowing for precise winding and unwinding without sagging and eliminating the need for a heavy roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a heavy roller is used to wind the display panel and back cover, then the winding stability is improved, but the device weight increases
Solution Approach 1:
The roller is segmented into multiple rolling guide parts (first rolling guide part, second rolling guide part, etc.) that are distributed along the winding path. Each rolling guide part has a smaller individual mass but collectively provides the necessary winding stability through their distributed arrangement and interaction with the back cover's protruding portions.
Solution Approach 2:
Protruding portions are introduced as intermediary elements on the back cover that engage with the rolling guide parts. These protruding portions act as mediators between the rolling guide parts and the back cover, enabling stable winding through mechanical engagement (groove-protruding portion fitting) without requiring a heavy roller.
2Device complexity
If the display panel and back cover are wound without support structures, then the device complexity is reduced, but central portion sagging occurs
Solution Approach 1:
Instead of providing uniform support across the entire back cover, rolling guide parts are strategically positioned at specific locations where support is most needed during winding. The first rolling guide part, second rolling guide part, and additional rolling guide parts are arranged to provide localized support at critical points, preventing sagging only where necessary while maintaining overall structural simplicity.
Solution Approach 2:
The back cover is designed with pre-formed protruding portions at specific locations that will engage with the rolling guide parts during winding. This preliminary structural preparation ensures that when winding occurs, the engagement between protruding portions and rolling guide parts automatically prevents central portion sagging without requiring complex active control mechanisms.
3Manufacturing precision
If protruding portions and groove portions are added to prevent sagging, then the winding precision is improved, but the manufacturing complexity increases
Solution Approach 1:
The rolling guide parts feature curved or arc-shaped surfaces that match the cylindrical shape formed when the back cover is wound. This curvature design allows the protruding portions to naturally engage with the rolling guide parts along the arc, ensuring precise winding positioning while using simple geometric forms that are relatively easy to manufacture compared to complex mechanical positioning systems.
Data Source
AI summary
A display device includes a first rolling guide parts and a second rolling guide parts each including at least one of a protruding portion and a groove portion, a connection part having one end fixed to the first rolling guide part and the other end fixed to the second rolling guide part, a back cover connected to the first rolling guide parts and the second rolling guide parts, and a display panel disposed on the back cover to achieve a lightweight rollable display device.