Dot-Shaped Cushions on Flexible Display Panels for Winding Stress Reduction
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Solution Overview
Problem
Flexible display devices face stress and strain issues when wound or rolled, leading to potential damage and degradation over cycles, particularly at connection points with winding axes, which existing designs fail to adequately mitigate.
Innovation Solution
Incorporation of a cushion unit on the flexible display panel, comprising a series of cushions arranged on the inner surface opposite to the display unit, which are spaced and extend in a widthwise direction intersecting the winding direction, providing elastic support and reducing stress through adhesive attachment, and strategically placed between the panel and the winding axis to absorb compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display panel is wound around the winding axis unit, then the display device achieves flexibility and portability, but stress and strain accumulate at connection points leading to damage and degradation
Solution Approach 1:
A cushion unit comprising multiple cushions is arranged on the flexible display panel at positions corresponding to where stress concentrates during winding. The cushions are positioned between the panel and the winding axis unit to absorb and distribute compression forces before they reach the connection points, preventing damage from accumulating over repeated winding cycles
Solution Approach 2:
The cushion unit is strategically positioned only at specific locations on the flexible display panel where stress and strain concentrate during winding operations. This localized cushioning approach targets the critical connection points between the panel and winding axis unit, providing enhanced protection exactly where needed without adding unnecessary complexity throughout the entire panel structure
2Device complexity
If existing designs are used without cushioning, then the device structure remains simple, but stress and strain cause stains and damage after rolling cycles
Solution Approach 1:
The cushion unit acts as an intermediary element positioned between the flexible display panel and the winding axis unit. This intermediate structure absorbs and distributes the compression forces generated during winding, preventing direct transmission of stress and strain to the panel's connection points and thereby preventing stains and damage
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 cushion unit significantly reduces stress and strain on the flexible display panel, extending its lifespan by preventing stains and damage from rolling cycles, as demonstrated by increased durability and reduced signs of wear after 20,000 rolling cycles compared to designs without such cushioning.
Implementation Method 1
a cushion unit arranged on the flexible display panel, wherein the cushion unit is arranged on a surface of the flexible display panel facing a circumferential surface of the winding axis unit
Data Source
AI summary
A flexible display apparatus includes a flexible display panel configured to wind around a winding axis unit, and a cushion unit arranged on the flexible display panel, wherein the cushion unit is arranged on a surface of the flexible display panel facing a circumferential surface of the winding axis unit.