Rollable OLED Display Linkage for Droop and Twist Control
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Solution Overview
Problem
Existing display devices, particularly those using flexible OLED panels, face challenges in maintaining structural rigidity to prevent drooping and twisting, especially when rolled or unwound from a panel roller.
Innovation Solution
A display device design incorporating a flexible OLED panel, a panel roller, a frame, foldable links, gearboxes, and a motor-driven shaft system that secures the panel's position and facilitates efficient winding and unwinding while maintaining rigidity against drooping and twisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display panel is used to enable rolling and unwinding, then adaptability and versatility are improved, but structural rigidity deteriorates causing drooping and twisting
Solution Approach 1:
The patent employs foldable links that can dynamically change their configuration between extended and folded states. When extended, they provide structural support to prevent drooping; when folded, they allow the display panel to be rolled. This dynamic adaptability resolves the contradiction between maintaining rigidity and enabling rolling capability.
Solution Approach 2:
The support structure is divided into multiple foldable links rather than a single rigid component. These segmented links can independently adjust their positions to provide support where needed while allowing rolling in other areas, thus maintaining both structural integrity and flexibility.
2Device complexity
If a simple rolling mechanism is used, then device complexity is reduced, but reliability deteriorates due to insufficient prevention of drooping and twisting
Solution Approach 1:
The foldable links are designed to automatically adjust their configuration based on the rolling state. During unwinding, they extend to provide structural support; during winding, they fold to accommodate the rolled configuration. This automatic dynamic adjustment ensures reliable prevention of drooping and twisting without requiring complex control systems.
Solution Approach 2:
The foldable links are positioned asymmetrically at specific locations along the display panel edges. This asymmetric placement optimizes the support distribution to effectively prevent both drooping and twisting, achieving high reliability with a relatively simple mechanism structure.
3Stability of the object's composition
If foldable links and gearboxes are added to maintain rigidity, then structural rigidity is improved, but device complexity increases
Solution Approach 1:
The patent combines the support function and the rolling control function into an integrated system. The foldable links serve both as structural supports and as components that enable rolling when folded. The gearboxes are integrated with the existing rolling mechanism, merging multiple functions into a unified system to minimize overall complexity.
Solution Approach 2:
The foldable links serve multiple functions: they provide structural support to prevent drooping, enable the rolling motion when folded, and maintain the display panel's positional stability. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while maintaining structural rigidity.
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 secures structural rigidity to prevent drooping and twisting, enabling a reliable and efficient driving mechanism for rollable display devices.
Implementation Method 1
a motor mounted to the frame between the first foldable link and the second foldable link
Implementation Method 2
a first gear box mounted to the frame adjacent to the first foldable link, and comprising at least one gear configured to cause the first foldable link to pivot
Implementation Method 3
one end pivotably coupled to the frame and another end pivotably coupled adjacent to a lower side of the flexible display panel
Data Source
AI summary
A display device comprising a flexible display panel, a panel roller, a frame, a first foldable link comprising one end pivotably coupled to the frame and another end pivotably coupled to a lower side of the flexible display panel, a second foldable link having one end pivotably coupled to the frame and the other end pivotably coupled adjacent to the lower side of the flexible display panel, wherein the second foldable link is located opposite to the first foldable link, a motor, a first gear box and comprising at least one gear configured to cause the first foldable link to pivot, a second gear and comprising at least one gear configured to pivot with respect to the second foldable link, and a driving shaft configured to transmit power to at least one gear of the first gear box or to the at least one gear of the second gear box.