Deformable Stiffening Elements for Flexible Displays
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Solution Overview
Problem
Thin, flexible displays are vulnerable to buckling and damage due to small bending radii, which can cause stress, and existing solutions to strengthen them increase the device size and thickness, compromising portability.
Innovation Solution
Deformable stiffening elements are attached to the flexible display screen, which flatten in a rolled-up state to decrease size while providing stiffness, using materials and shapes such as beams, ridges, and spirals that compress or tilt to maintain flexibility and reduce thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If stiffening elements are attached to the flexible display screen, then the display strength is improved, but the device size increases
Solution Approach 1:
The stiffening elements are designed to be deformable rather than rigid, allowing them to dynamically adapt their shape. When the display is rolled up, the stiffening elements flatten to reduce the overall device size. When the display is unrolled and in use, the stiffening elements return to their original shape to provide structural support and prevent buckling. This dynamic behavior resolves the contradiction between needing strength during use and minimizing size when stored.
Solution Approach 2:
The stiffening elements change their physical parameters (shape, thickness, rigidity) based on the display's state. In the rolled-up state, they flatten to decrease thickness and volume. In the unrolled state, they maintain their structural form to provide stiffness. This parameter transformation allows the same element to satisfy both contradictory requirements at different operational states.
2Volume of moving object
If the display is made thinner to enable rolling, then the portability is improved, but the vulnerability to buckling increases
Solution Approach 1:
The deformable stiffening elements provide dynamic structural support that activates when needed. During normal use with the display unrolled, the stiffening elements maintain their shape to prevent buckling. When the display is rolled up, the stiffening elements flatten along with the display, allowing it to achieve a thin, portable form factor without permanent structural reinforcement that would prevent rolling.
Solution Approach 2:
Instead of making the entire display structure thicker or more rigid throughout, the stiffening elements are strategically attached to specific areas of the display screen where structural support is most needed. This localized reinforcement provides buckling resistance only where necessary, allowing the rest of the display to remain thin and flexible for portability.
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 strengthens the display to prevent buckling while maintaining a reasonable size in the rolled-up state, enhancing portability and durability without increasing the device's thickness.
Implementation Method 1
the elements being flattened when the display screen is in a rolled-up state
Data Source
AI summary
According to one aspect, the invention provides a device with a flexible display screen. The flexible display screen is rollable around an axis between a rolled-up state and an unrolled state. For stiffening the screen, stiffening elements are attached to the flexible display screen. The stiffening elements are compressible. They are compressed when the display screen is in a rolled-up state, so as to decrease the size of the rolled-up display device. Therefore, the invention strengthens the display, while at the same time retains a reasonable size of the display in the rolled-up state.