Rollable Display Panel Flatness via Magnetic Holding
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Solution Overview
Problem
Flexible display devices face challenges in preventing the display panel from curving when rolled up, which can lead to damage if drawn out strongly.
Innovation Solution
A display device design featuring a panel member with a display panel and a magnetic member on its back, attracted by magnets positioned on the opposite side, helps maintain flatness when drawn out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the display is drawn strongly in the draw-out direction to suppress the display panel from being curved, then the display panel flatness is improved, but the display panel is likely to be damaged
Solution Approach 1:
A magnetic member is introduced as an intermediary between the display panel and the external environment. The magnetic member adheres to the back surface of the display panel and interacts with magnets in the housing to provide holding force, suppressing curvature without requiring strong external drawing forces that could damage the panel.
Solution Approach 2:
The mechanical system of strong external drawing forces is replaced with a magnetic field-based system. Magnets in the housing attract the magnetic member on the display panel back surface, creating a holding force that suppresses curvature through magnetic attraction rather than mechanical tension, thereby preventing panel damage.
2Adaptability or versatility
If the display panel is made flexible to enable rolling up, then the adaptability is improved, but the display panel becomes prone to curving when drawn out
Solution Approach 1:
The magnetic member serves as a mediator between the flexible display panel and the housing structure. It provides magnetic coupling that helps maintain panel flatness during draw-out operations, counteracting the inherent curvature tendency of flexible panels while preserving their rollable capability.
Solution Approach 2:
The magnetic holding force dynamically counteracts the curvature parameter of the flexible display panel. By adjusting the magnetic attraction strength through the positioning of magnets in the housing, the system maintains optimal flatness while allowing the panel to remain flexible and rollable.
3Shape
If the magnetic holding force is increased to suppress curvature, then the display panel flatness is improved, but the ease of rolling up deteriorates
Solution Approach 1:
The magnetic member is positioned specifically on the back surface of the display panel where curvature occurs during draw-out. This localized magnetic interaction provides holding force only where needed to suppress curvature, while allowing the rest of the panel to remain flexible and easy to roll up.
Solution Approach 2:
The magnetic holding force is optimized to provide sufficient attraction to suppress curvature during draw-out operations while remaining weak enough to allow easy rolling up. The positioning and strength of magnets in the housing are tuned to achieve the right balance between these two opposing requirements.
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
This solution effectively suppresses the display panel from curving while drawn out, thereby preventing damage and ensuring the panel remains flat and functional.
Implementation Method 1
a magnet that is positioned on a side, opposite to the display panel, of the magnetic member and attracts the magnetic member
Data Source
AI summary
Provided is a display device including a panel member that has a display panel and a magnetic member adhering to a back surface of the display panel and that is capable of being rolled up, and a magnet that is positioned on a side, opposite to the display panel, of the magnetic member and attracts the magnetic member, in a state where the panel member is drawn out.