Foldable Device Movable Frame and Curved Receiving Space
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Solution Overview
Problem
Foldable devices with flexible displays face challenges in reducing compressive and tensile forces during folding/unfolding, maintaining a natural curve shape, and minimizing space between the display and bodies, leading to potential damage and incomplete flattening.
Innovation Solution
A foldable device design featuring a flexible display with a movable frame system, friction reducing members, and elastic units that allow the display to maintain a predetermined unfolding angle and reduce forces applied during folding/unfolding, ensuring the display remains flat and functional.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the flexible display device is sharply bent during folding, then the device can be compacted to a smaller size, but the flexible display device itself may be damaged
Solution Approach 1:
The patent applies curvature by forming a receiving space with a predetermined curvature radius in the first body to accommodate the curved portion of the flexible display during folding. This curved receiving space allows the display to bend smoothly without sharp creases, reducing stress and preventing damage while achieving compact folding
2Reliability
If a curved portion is formed in the flexible display during folding, then the display can be bent without damage, but the curved portion may not be able to spread flat after prolonged folding
Solution Approach 1:
The patent applies beforehand cushioning by providing a receiving space with optimized curvature radius that cushions the flexible display during folding. This pre-designed curved space prevents excessive bending stress and allows the display to return to its original flat state after unfolding, even after prolonged folding cycles
Solution Approach 2:
The patent applies parameter changes by optimizing the curvature radius of the receiving space to match the flexible display's characteristics. By carefully selecting the curvature radius parameter, the display can form a natural curve during folding and then return to a flat state when unfolded, maintaining both integrity and flatness
3Area of moving object
If the flexible display extends through the foldable structure to provide a larger screen, then the display area increases, but the space between the display and bodies increases during folding/unfolding
Solution Approach 1:
The patent applies nesting by placing the curved portion of the flexible display inside the receiving space formed in the first body during folding. This nested arrangement allows the display to extend across both bodies for a large screen area while accommodating the folded portion compactly within the receiving space, minimizing the space between the display and bodies
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 reduces forces on the flexible display, maintains its natural curve shape, and ensures complete flattening, enhancing the durability and usability of foldable devices.
Implementation Method 1
an elastic unit configured to apply an elastic force to the first and second bodies so that the first and second bodies are maintained in the unfolded position
Implementation Method 2
a friction reducing member provided between the fixed frame and the movable frame and configured to reduce friction between the movable frame and the fixed frame
Data Source
AI summary
A foldable device includes: a flexible display including: a first part; a second part; and a third part provided between the first and second parts; a first body supporting the first part; and a second body supporting the second part, each of the first and second body are configured to move between a first and a second position, in response to each of the first and second bodies being provided in the first position, the first body and the second body form a receiving space, the third part forms a curved portion of the flexible display and the curved portion is provided within the receiving space, and wherein the first part is configured to move in a longitudinal direction of the flexible display with respect to the first body in response to the first and second bodies moving between the first and second positions.