Flexible Display Panel Wrinkle Prevention via Elastic Holder Tensioning
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Solution Overview
Problem
Flexible display panels often develop wrinkles when wound, leading to image distortion and potential damage due to inadequate tensioning and support mechanisms.
Innovation Solution
A display device incorporating an elastic holder with a tension applier set, dampers, and a roller moving unit to maintain panel flatness and prevent wrinkles, featuring a groove for edge fitting and a fixing frame with a cover surface and side walls for secure attachment, along with an optical sensor for bias detection and compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible display panel is wound on the roller without adequate tensioning, then the winding operation is simple, but wrinkles occur leading to image distortion and panel damage
Solution Approach 1:
The tensioning mechanism is segmented into multiple independent tension appliers (first and second tension appliers) positioned at opposite ends of the elastic holder. Each tension applier independently applies tension to opposite edges of the display panel, allowing distributed tension control that prevents wrinkles while maintaining panel integrity during winding.
Solution Approach 2:
The elastic holder's elasticity parameter is utilized to dynamically adjust tension based on winding conditions. The elastic holder can stretch and contract, automatically adapting the tension force applied to the panel edges, which prevents wrinkles without requiring complex active control systems.
2Reliability
If an elastic holder with tension appliers is used to prevent wrinkles, then panel flatness is maintained, but the device structure becomes more complex
Solution Approach 1:
The elastic holder serves multiple functions simultaneously: it acts as a structural support element, a tensioning mechanism, and a positioning device. The groove portion not only holds the panel edge but also guides its position during winding, eliminating the need for separate positioning components and reducing overall device complexity.
Solution Approach 2:
The groove portion is nested within the elastic holder structure, and the panel edge is nested within the groove. This nested arrangement allows compact integration of multiple functions (support, tensioning, positioning) within a single integrated component, minimizing the space and additional parts required.
3Reliability
If the elastic holder is tensioned at opposite ends, then wrinkle formation is prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The elastic holder's groove portion is designed to automatically receive and position the panel edge through its geometric shape. The elastic material self-adjusts to accommodate the panel edge, eliminating the need for precise alignment procedures or additional fastening operations during assembly, thereby simplifying the manufacturing process.
Solution Approach 2:
The groove portion is pre-formed in the elastic holder during manufacturing, creating a ready-to-receive receptacle for the panel edge. This preliminary preparation of the holding structure eliminates the need for on-site assembly adjustments or complex fastening procedures, making the overall assembly process simpler.
4Reliability
If dampers with high elasticity are added to extend in the pulling direction, then panel bias compensation is improved, but the device complexity increases
Solution Approach 1:
The damper's high elasticity parameter is specifically selected to match the expected range of panel bias during winding. This parameter optimization allows the damper to automatically compensate for bias forces through its elastic deformation, providing effective bias compensation without requiring active sensors or control systems.
Solution Approach 2:
The damper acts as an intermediary element between the elastic holder and the external support structure. It mediates the transmission of forces, absorbing and compensating for bias forces through its elastic properties, thereby protecting the panel while simplifying the overall force transmission path compared to rigid mechanical linkages.
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 prevents wrinkle formation and image distortion, ensuring the flexible display panel remains flat and minimizes damage during winding and unwinding, thereby maintaining satisfactory display quality and reliability.
Implementation Method 1
an elastic holder fixed to an edge of the flexible display panel... The tension applier set may include: a pair of nuts fixed to opposite end portions of the elastic holder; and a pair of bolts fastened to the pair of nuts, interposing the side wall of the fixing frame
Implementation Method 2
a plurality of dampers disposed between the elastic holder and the cover surface of the fixing frame. The dampers may have elasticity that is greater than that of the elastic holder. The dampers may be extended in a direction of pulling the flexible display panel when the flexible display panel is wound on the roller
Implementation Method 3
a roller moving unit coupled to the roller to move the roller in an axial direction. The roller moving unit may compensate a bias of the flexible display panel generated in a direction while the flexible display panel is wound to the roller, by moving the roller in the direction
Data Source
AI summary
A display device includes a flexible display panel, a roller for winding the flexible display panel, an elastic holder fixed to an edge of the flexible display panel and having a side parallel to the edge of the flexible display panel, and a tension applier set disposed at opposite ends of the elastic holder for tensioning the elastic holder.