Foldable Display Support Structure With Anti-Degumming Buffer Bar

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Solution Overview

Problem

Conventional foldable mobile devices with flexible screens face issues of degumming between the flexible screen and the bending supporting portion due to relative displacement during folding and unfolding, leading to poor product quality.

Innovation Solution

A supporting structure with planar and bending supporting portions, featuring a flexible supporting bar connected to a bending skeleton through connecting portions that allow for relative displacement between the supporting portion and the skeleton, reducing the risk of degumming by maintaining a stable connection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the flexible screen is bonded and fastened directly to the bending supporting portion, then the connection strength should be sufficient, but relative displacement occurs during folding and unfolding causing degumming

Engineering Contradiction:
Improveconnection strengthVSAvoidconnection reliability
Core Design Contradiction:
StrengthVSReliability

Solution Approach 1:

The patent introduces a dynamic buffer zone between the flexible screen and bending skeleton through the flexible supporting bar structure. The buffer zone allows controlled relative movement during folding/unfolding cycles, transforming the rigid connection into a dynamic system that accommodates dimensional changes while maintaining overall connection integrity.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The flexible supporting bar acts as an intermediary element between the flexible screen and the bending skeleton. It includes a buffer zone that mediates the interaction between these two components, absorbing relative displacement and preventing direct contact that would cause degumming, while still maintaining structural support.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Strength

If the bending supporting portion has a specified thickness to provide structural support, then the supporting strength is sufficient, but it causes relative displacement with the flexible screen during bending

Engineering Contradiction:
Improvesupporting strengthVSAvoidrelative position stability
Core Design Contradiction:
StrengthVSStability of the object's composition

Solution Approach 1:

The flexible supporting bar is designed with a buffer zone that enables dynamic adjustment of the gap between the flexible screen and bending skeleton. During folding, the buffer zone expands to accommodate the thickness of the bending supporting portion, and during unfolding, it contracts to minimize the gap, thereby maintaining stable relative positioning while preserving supporting strength.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of the gap distance between the flexible screen and bending skeleton from a fixed value to a variable parameter. The buffer zone allows this gap to dynamically change based on the folding state, expanding when needed to accommodate structural thickness and contracting to maintain stability, thus resolving the contradiction between supporting strength and position stability.

Inventive Principle:
Principle #35Parameter changes

3Strength

If the flexible screen is bonded to the flexible supporting bar with multiple connecting portions, then the connection strength improves, but the structure becomes more complex

Engineering Contradiction:
Improvebonding strengthVSAvoidstructure complexity
Core Design Contradiction:
StrengthVSDevice complexity

Solution Approach 1:

The flexible supporting bar is segmented into distinct functional zones: the buffer zone and the connecting portions. This segmentation allows the buffer zone to handle relative displacement while the connecting portions provide stable bonding points, distributing the connection function across multiple discrete elements rather than a continuous complex structure.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Instead of providing continuous bonding along the entire interface, the patent uses discrete connecting portions spaced at intervals. This partial action approach provides sufficient connection strength at critical points while leaving gaps that accommodate the buffer zone, reducing overall structural complexity compared to continuous bonding.

Inventive Principle:
Principle #16Partial or excessive action

Data Source

PatentEP3944599B1Support structure and foldable display device
Publication Date: 2025.08.27 HUAWEI TECH CO LTD
  • EP3944599B1 patent drawingFigure 1~2
  • EP3944599B1 patent drawingFigure 3~4
  • EP3944599B1 patent drawingFigure 5~6

AI summary

This application provides a supporting structure and a foldable display apparatus. The supporting structure is configured to support a flexible screen. The flexible screen includes planar regions and a bending region connected between the planar regions. The supporting structure of the foldable display apparatus includes planar supporting portions and a bending supporting portion. The planar supporting portions support the planar regions of the flexible screen, and the bending supporting portion supports the bending region of the flexible screen. The bending supporting portion includes a bending skeleton and a flexible supporting bar connected to the bending skeleton, and the flexible supporting bar is in direct contact with the flexible screen. The flexible supporting bar includes a supporting portion and a plurality of connecting portions that are distributed at intervals and fastened to the supporting portion. The supporting portion is connected to the flexible screen. The connecting portions are located on a side of the supporting portion away from the flexible screen, and an end of each of the plurality of connecting portions away from the supporting portion is connected to the bending skeleton.