Rollable Display Device with Link Driving Unit
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Solution Overview
Problem
Conventional flexible display devices are not designed to maximize flexibility, leading to limitations in screen size adjustment and potential damage due to irregular rolling and friction during unfolding and folding, resulting in a suboptimal user experience and risk of screen damage.
Innovation Solution
A rollable display device with a flexible screen that incorporates a pair of rollable driving units, a link driving unit, and a controller to manage the rolling and unrolling of both sides of the screen, along with a vertical movement adjusting unit to maintain flatness and reduce friction, using a double cylindrical structure and electromagnets to ensure uniform movement and interval control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed curved display structure or variable flexible screen is used, then the display can maintain a curved shape, but the screen size adjustment flexibility is limited
Solution Approach 1:
The patent implements a dynamic rolling mechanism where the flexible screen can be rolled up and unrolled on both sides, transforming from a static curved display to a dynamic structure that adapts screen size based on user needs. The screen transitions between fully extended, partially rolled, and fully rolled states, enabling continuous screen size adjustment rather than fixed configurations.
Solution Approach 2:
The display structure is divided into multiple independent rolling units, with each side of the screen having its own rolling mechanism. This segmentation allows independent control of left and right rolling operations, enabling versatile screen size adjustments including asymmetric rolling configurations where one side rolls more than the other.
2Adaptability or versatility
If rollable driving units are added to enable flexible screen rolling, then screen size versatility improves, but the risk of screen damage due to irregular rolling and friction increases
Solution Approach 1:
The patent introduces guide rails as intermediary structures between the rolling driving units and the flexible screen. These guide rails constrain the rolling motion to a predetermined linear path, preventing irregular rolling that could cause screen damage. The guide rails act as mediators that ensure the screen rolls smoothly without lateral deviation or excessive friction.
Solution Approach 2:
The patent incorporates protection units that are positioned in advance to cover and protect the flexible screen during rolling operations. These protection units are pre-configured to guide the screen edges and prevent direct contact between the rolling mechanism and the screen surface, reducing friction and preventing damage before it can occur.
3Volume of moving object
If the flexible screen is rolled tightly to achieve compact form factor, then portability improves, but wrinkles and screen damage may occur
Solution Approach 1:
The patent implements a nested rolling structure where the flexible screen is rolled into a compact cylindrical or spiral form that fits within the device housing. The rolling mechanism allows the screen to be nested concentrically around a central axis, achieving maximum compactness while maintaining uniform tension distribution that prevents wrinkles and localized stress concentrations.
4Ease of manufacture
If conventional flexible display structures are used, then manufacturing is simpler, but the display cannot maximize the advantage of flexibility for various screen sizes
Solution Approach 1:
The patent designs a universal rolling mechanism that can be applied to flexible displays of various sizes and configurations. The same basic rolling structure, guide rail system, and control logic can accommodate different screen dimensions and aspect ratios, making the design universally applicable across product lines while maximizing flexibility benefits.
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
Enables flexible screen displays to be safely rolled and unrolled across various sizes, maintaining high-quality, wrinkle-free, and damage-resistant performance, enhancing user experience and product completion.
Implementation Method 1
one end is fixed and is affixed to a lower portion of the support and the other end moves up and down along a screw bar attached to an upper portion of the support. The screw bar may rotate in forward and backward directions according to the driving motor installed to the support
Implementation Method 2
a pair of elastic springs respectively installed at both ends of the lower side of the flexible screen display in the folded state
Implementation Method 3
first and second electromagnets installed between the internal cylindrical unit and the external cylindrical unit; and a sensor for detecting an interval between the external cylindrical unit and the internal cylindrical unit
Data Source
AI summary
A rollable display device is provided. The rollable display device includes: a flexible screen display which is rolled or unrolled on both sides; at least one pair of rollable driving units where each side of the flexible screen display is rolled into or unrolled from one of the pair of rollable driving units; a link driving unit for supporting the rollable driving units to move the sides of the flexible screen display and to roll or unroll the flexible screen display; and a controller for controlling operations of the rollable driving units and the link driving unit.