Foldable Display Support Structure for Flatness at the Bending Portion
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Solution Overview
Problem
Existing foldable display devices suffer from poor rigidity and flatness issues due to inadequate support for the bending portion of flexible display panels, leading to bulging and creasing, which can cause film stripping and reduced service life.
Innovation Solution
A support device is provided with a rotating shaft support and multiple support components connected to a bendable structure, including a first and second support for non-bending portions and a rotating shaft support that allows the bending portion to be supported, ensuring flatness and stability during folding and unfolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible display substrates are used in foldable devices, then good bending performance is achieved, but rigidity and flatness deteriorate due to inadequate support for the bending portion
Solution Approach 1:
The support device is divided into multiple segments: first support connected to first non-bending portion, second support connected to second non-bending portion, rotating shaft support connecting both supports, and support components connecting to bending portion. This segmented structure provides distributed support to maintain rigidity while allowing bending flexibility.
Solution Approach 2:
The rotating shaft support enables dynamic adjustment of the support structure. The rotating shaft allows the support components to rotate and adapt to different folding angles, maintaining optimal support geometry throughout the bending process to prevent bulging while preserving flexibility.
2Adaptability or versatility
If flexible display substrates are used in foldable devices, then good bending performance is achieved, but flatness deteriorates due to bulging of the bending portion
Solution Approach 1:
Support components are specifically positioned to provide localized support to the bending portion at critical areas. The support bars and connectors are arranged to target specific regions prone to bulging, providing non-uniform support distribution that maintains flatness where needed while allowing natural bending in other areas.
Solution Approach 2:
The support device is pre-configured with support components positioned to prevent bulging before it occurs. The rotating shaft support and support bars are arranged in advance to provide proactive support to the bending portion, preventing deformation rather than correcting it after occurrence.
3Device complexity
If inadequate support is provided for the bending portion, then device complexity is reduced, but reliability deteriorates due to film stripping and reduced service life
Solution Approach 1:
The support device employs a nested structure where support components including support bars, connectors, and rotating shaft elements are arranged in concentric or hierarchical configurations. This nesting provides multiple levels of support within a compact arrangement, enhancing reliability without proportionally increasing overall device complexity.
Solution Approach 2:
The support device combines different material properties and structural elements: rigid support bars for structural integrity, flexible connectors for movement accommodation, and rotating shaft mechanisms for angular adaptation. This composite approach ensures reliable support throughout the folding cycle while maintaining reasonable device complexity.
Data Source
AI summary
A support device is provided. The support device is disposed on a back side of a bendable structure, the bendable structure comprising a bending portion, and a first non-bending portion and a second non-bending portion disposed on two sides of the bending portion, respectively; the support device comprising: a first support, configured to be connected to the first non-bending portion; a second support, configured to be connected to the second non-bending portion; a rotating shaft support, configured to be rotatably connected to the first support and the second support; and at least one support component, wherein each support component comprises a strip-shaped support bar, wherein the support bar is connected to the rotating shaft support and configured to be fixedly connected to the bending portion.