Expandable Display Bending Guide Stress Reduction
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Solution Overview
Problem
Existing expandable display devices that use rollers apply constant stress to flexible display panels, leading to potential damage and reduced durability.
Innovation Solution
The implementation of a bending guide with curved sides of different radii to guide the flexible display panel, reducing stress by allowing the panel to bend without constant tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a roller mechanism is used to enable the flexible display panel to slide, then the display device can be expanded and contracted, but constant stress is applied to the flexible display panel leading to potential damage and reduced durability
Solution Approach 1:
The patent removes the roller mechanism from the system entirely and replaces it with a bending guide structure. This extraction eliminates the source of constant stress while preserving the expandable functionality through alternative means (bending guides with curved surfaces that guide panel movement without rolling contact).
Solution Approach 2:
The bending guide acts as an intermediary structure between the flexible display panel and the housing. Instead of direct roller contact, the bending guide with its curved surfaces mediates the movement, allowing the panel to slide and bend while distributing stress more evenly and avoiding the concentrated stress points caused by rollers.
2Ease of operation
If the flexible display panel is made more flexible to enable easy bending and sliding, then the device can be easily moved and stored, but the panel becomes more susceptible to damage from stress and friction
Solution Approach 1:
The bending guide incorporates curved surfaces with specific radii of curvature that match or complement the flexibility of the display panel. These curved surfaces guide the bending motion smoothly, distributing mechanical stress across a larger area and preventing stress concentration that would occur with sharp edges or rigid guides, thereby protecting the flexible panel from damage.
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 reduces stress on the flexible display panel, minimizing damage and enhancing its durability and lifespan.
Implementation Method 1
A flexible display panel includes a first side on which a display unit is provided, and a second side opposite to the first side. A bending guide includes an external guide that faces part of the first side and has a first curved side, and an internal guide that faces part of the second side and has a second curved side. When the slider moves toward the bending guide, the first side contacts the first curved side and is bent by the first curved side, and when the slider moves away from the bending guide, the second side contacts the second curved side and is bent by the second curved side.
Data Source
AI summary
A flexible display panel of an expandable display device includes a first side with a display unit, and a second side opposite to the first side. A bending guide includes an external guide that faces part of the first side and has a first curved side, and an internal guide that faces part of the second side and has a second curved side. A slider that slides on the bending guide is attached to one end portion of the flexible display panel. A radius of the first curved side is greater than a radius of the second curved side. When the slider moves toward the bending guide, the first side contacts the first curved side and is bent by the first curved side, and when the slider moves away from the bending guide, the second side contacts the second curved side and is bent by the second curved side.