Rollable Display Link Structure With Overlapping Rails
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Solution Overview
Problem
Existing rollable display apparatuses require large and rigid link structures for drawing out and supporting the display, leading to increased size and volume, and a need for optimized driving device capacity.
Innovation Solution
A display apparatus with improved link structures featuring inclined links, overlapping rails, and a driving device with a motor and screw mechanism to minimize size and optimize capacity, allowing for efficient movement and storage of the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large and rigid link structures are used for drawing out and supporting the rollable display, then the display can be reliably supported and drawn out, but the housing size and volume increase
Solution Approach 1:
The link structure is divided into multiple segments (first link, second link, third link, fourth link) that can rotate relative to each other. This segmentation allows the display to be drawn out in a folded configuration rather than requiring a single large rigid link, thereby reducing the housing volume while maintaining support reliability.
Solution Approach 2:
The link structure transitions from a static rigid configuration to a dynamic multi-segmented configuration that can rotate and adapt. The links rotate relative to each other during display deployment and retraction, enabling compact storage while providing full display support when deployed.
2Reliability
If large capacity driving devices are used to move the link structures, then the display can be drawn out and retracted reliably, but the device complexity and size increase
Solution Approach 1:
The third link and fourth link are configured to rotate in opposite directions, creating a counterbalancing effect that reduces the net force required from the driving device. This counterweight principle allows reliable display movement with a smaller, less complex driving device.
Solution Approach 2:
The driving device utilizes the dynamic rotation of multiple links rather than moving a single large mass. By distributing the movement across multiple rotating segments, the required driving force and device capacity are reduced while maintaining reliable display deployment.
3Strength
If thick link structures are used to maintain rigidity, then the display can be reliably supported, but the housing size increases
Solution Approach 1:
The link structure is segmented into multiple thinner links that rotate relative to each other. This segmentation allows each individual link to be thinner while the overall structure maintains sufficient rigidity through the rotational joint mechanism, reducing housing volume without sacrificing support capability.
Solution Approach 2:
The rigidity is dynamically maintained through the rotational joints that lock into position during display deployment. The links can be thinner because the dynamic configuration provides structural stability when needed, while allowing compact folding when the display is retracted.
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 enables a compact housing for rollable displays by reducing the size and thickness of link structures while maintaining stability and efficiency in drawing out and retracting the display, minimizing the initial driving force required and power loss during operation.
Implementation Method 1
a first screw provided in parallel with the first rail, a second screw provided in parallel with the second rail, and a motor configured to rotate the first screw and the second screw
Implementation Method 2
a first slider and a second slider rotatably connected to a second end of the first link and a second end of the second link, respectively
Data Source
AI summary
Provided is a display apparatus including a housing having an opening, a roll provided inside of the housing, a display configured to be rolled around the roll and drawn out or in through the opening, a frame provided on an upper end or a lower end of the display, a first link having a first end rotatably connected to a first end of the frame, a second link having a first end rotatably connected to a second end of the frame, a first slider and a second slider rotatably connected to a second end of the first link and a second end of the second link, respectively, and a first rail and a second rail horizontally provided inside of the housing and providing movement paths of the first slider and the second slider, respectively, wherein the first rail and the second rail at least partially overlap each other in a front-rear direction.