Rollable Display Module Support Bars for Wrinkle-Free Surface Quality
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Solution Overview
Problem
Existing flexible display devices, particularly rollable display devices, face challenges in maintaining the surface quality of the display module due to deformation and wrinkles when rolled and unrolled, which degrades the visual appearance.
Innovation Solution
A display device with a module support system comprising a support layer and support bars, where the support bars have a higher modulus than the support layer, providing a flat upper surface to the display module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display module is made flexible to enable rolling and unrolling, then adaptability and portability are improved, but surface quality deteriorates due to wrinkles and deformation
Solution Approach 1:
The support structure is segmented into multiple support bars arranged in a matrix pattern beneath the display module. This segmentation allows the support bars to independently maintain flatness in different regions while collectively providing comprehensive support across the entire flexible display surface, preventing wrinkles during rolling and unrolling operations
Solution Approach 2:
The support structure combines rigid support bars with a flexible support layer to create a composite structure. The rigid bars provide structural integrity and flatness maintenance, while the flexible support layer allows the overall structure to bend and roll without breaking, thus maintaining surface quality while preserving flexibility
2Manufacturing precision
If rigid support structures are added to maintain flatness, then surface quality is improved, but device complexity increases
Solution Approach 1:
The support layer is designed as a thin, flexible film that can bend and roll with the display module while providing a smooth surface. This thin-film approach maintains surface quality without adding significant structural complexity or thickness, as the flexible film naturally conforms to the rolling motion while keeping the display surface flat
Solution Approach 2:
The support bars and support layer are merged into an integrated support structure that functions as a unified system. The support bars are embedded within or attached to the support layer, combining the rigid support function with the flexible surface function in a single integrated component rather than separate assemblies, thus reducing overall device complexity
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 module support system effectively maintains a flat surface quality of the display module, improving its appearance by supporting it with rigid bars and an elastic layer, preventing wrinkles during rolling and unrolling.
Implementation Method 1
a plurality of support bars disposed in the support layer and having a modulus greater than a modulus of the support layer
Implementation Method 2
The support layer includes a material having a negative coefficient of thermal expansion
Data Source
AI summary
A display device includes a display module, a module support disposed below the display module, and a housing receiving the display module and the module support, wherein the module support includes a support layer disposed below the display module, and a plurality of support bars disposed in the support layer and having a greater modulus than the support layer.