Interwoven Spring Support for Rollable Display Curvature Control
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Solution Overview
Problem
Conventional deformable display devices face challenges in maintaining alignment, improving surface quality, and reducing weight while controlling the target curvature radius, which are essential for efficient rolling and unfolding mechanisms.
Innovation Solution
A deformable display device with a supporting structure comprising interwoven coil springs arranged orthogonally, where the coil pitch is equal to or greater than twice the diameter of the coil wiring, and an adhesive layer is used between the springs and the display panel to ensure alignment and surface quality, allowing for controlled curvature and weight reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a dense support structure is used to improve surface quality, then surface quality is improved, but weight increases
Solution Approach 1:
The patent employs a thin film support structure with embedded micro-coils instead of traditional dense rigid support. This flexible film structure maintains surface quality while significantly reducing weight, allowing the display device to be deformable yet maintain proper surface characteristics.
Solution Approach 2:
The support structure incorporates a porous or mesh-like configuration with micro-coils embedded in the thin film. This porous design reduces material usage and weight while maintaining structural integrity and surface quality through the distributed coil support system.
2Volume of moving object
If the curvature radius is reduced for compact rolling, then portability is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent uses dynamically adjustable micro-coils that can change their support characteristics based on the degree of rolling. When fully rolled, the coils compress to accommodate the small curvature radius; when unrolled, they extend to maintain precise alignment and manufacturing precision. This dynamic adaptation resolves the contradiction between compact size and precision.
Solution Approach 2:
The support structure's physical parameters (coil compression, film tension) are changed based on the device's state. In the rolled state, parameters allow tight curvature; in the unrolled state, parameters maintain precise alignment. This parameter adaptation enables both small curvature radius and high manufacturing precision at different operational states.
3Strength
If conventional support structures are used, then structural strength is maintained, but alignment and surface quality deteriorate
Solution Approach 1:
The continuous support structure is segmented into multiple independent micro-coils distributed across the thin film. Each micro-coil acts as an independent support element that can be precisely positioned and controlled, maintaining overall structural strength while enabling precise alignment and surface quality through localized adjustment.
Solution Approach 2:
The thin film acts as an intermediary between the micro-coils and the display panel. It transmits and distributes the support forces from the discrete coils across the entire surface, maintaining structural strength while the precise coil positioning ensures alignment and surface quality. The film mediates between the discrete coil elements and the continuous display surface.
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 maintains alignment, enhances surface quality, and reduces the weight of the display device while allowing for precise control of the curvature radius, enabling efficient rolling and unfolding mechanisms.
Implementation Method 1
a supporting part positioned under the display panel, where the supporting part includes a plurality of springs that are interwoven with each other
Implementation Method 2
A first adhesive layer positioned between the first surface of the plurality of springs and the display panel may be further included
Data Source
AI summary
A display device including a deformable display unit according to an embodiment includes: a display panel that can display images in a first direction and a supporting part positioned under the display panel. The supporting part includes a plurality of springs that are arranged in a second direction and extend in a third direction, and are interwoven with each other. The first direction, second direction, and third direction are substantially orthogonal to each other.