Umbrella-Style Foldable Display With Radial Hinge and Recessed Lid
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Solution Overview
Problem
Current foldable display devices are too large when in a folding state, limiting their portability and convenience.
Innovation Solution
A foldable display device design featuring a flexible display module with multiple folding regions and non-folding regions, supported by a hinge mount and support bars that allow the device to fold in an umbrella-like manner, reducing its size through a combination of recesses in the protective cover lid and a filling layer with a lower elastic modulus, and a rigid support element for structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a foldable display device uses a single folding axis or two parallel folding axes, then the device can achieve a folding function, but the device size in the folding state becomes too large
Solution Approach 1:
The folding region is divided into multiple second folding regions and third folding regions that are radially arranged around the first folding region. This segmentation allows the display panel to fold along multiple radial axes simultaneously, enabling a more compact folded state while maintaining the folding function.
Solution Approach 2:
The patent transitions from a single-axis or parallel dual-axis folding structure to a radial multi-axis folding structure. By arranging folding regions in a radial pattern around a central first folding region, the device achieves folding in multiple dimensions, significantly reducing the folded size.
2Strength
If the protective cover lid is made rigid for structural integrity, then the device maintains strength, but the folding region cannot fold smoothly
Solution Approach 1:
The protective cover lid is designed with different local properties: rigid in non-folding regions for structural integrity, and flexible with recesses in folding regions for smooth folding. This local differentiation allows the lid to maintain overall strength while enabling folding functionality in specific areas.
Solution Approach 2:
The protective cover lid incorporates flexible materials and thin film structures in the folding regions, allowing it to bend and fold smoothly. The lid transitions from a completely rigid structure to a hybrid structure with flexible portions that enable folding while maintaining protective functionality.
3Ease of operation
If a filling layer with lower elastic modulus is added to the folding region, then foldability is improved, but the device structure becomes more complex
Solution Approach 1:
The filling layer acts as an intermediary element between the protective cover lid and the display panel in the folding regions. This intermediate layer with lower elastic modulus facilitates smooth folding by reducing stress concentration, while the recesses in the protective cover lid provide a structural framework that guides the folding process.
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 design effectively reduces the size of the foldable display device in its folded state, enhancing portability while maintaining structural integrity and foldability, allowing for a more compact and convenient form factor.
Implementation Method 1
a filling layer, wherein at least a portion of the filling layer is filled in the recesses of the protective cover lid, and an elastic modulus of the filling layer is less than an elastic modulus of the protective cover lid
Implementation Method 2
a plurality of support bars located on the rear side of the light exiting surface of the flexible display module, articulated on the hinge mount along a radial direction of the hinge mount, and connected to portions of the flexible display module corresponding to the second folding regions, wherein the support bars are configured to rotate to drive the flexible display module to stretch or fold
Data Source
AI summary
The present provides a foldable display device. When the foldable display device folds, the foldable display device is in an umbrella-like the folding state to reduce a size of the foldable display device in the folding state, which has an advantage of convenience of carrying.