Hydraulic Hinge Assembly for Compact Foldable Display Damping

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Solution Overview

Problem

Existing foldable display devices with electric driving assemblies require complex external control circuits, occupying significant space and complicating the hinge structure.

Innovation Solution

A hinge structure incorporating a rotating shaft, driving assembly, and connecting assembly that operates in a hydraulic or pneumatic manner without an external control circuit, allowing the connecting assembly to move relative to the rotating shaft, thereby controlling a flexible display panel and providing damping effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If an electric driving assembly with external control circuits is used, then the driving function is achieved, but the device complexity and space occupation increase

Engineering Contradiction:
Improvehinge structure complexityVSAvoiddriving function reliability
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent extracts and removes the external control circuits from the hinge structure, retaining only the essential driving components. The driving assembly is designed to operate independently without requiring external control circuitry, thereby simplifying the overall device while maintaining the core driving function.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The driving assembly is designed to perform multiple functions within a single integrated structure. It provides both the driving force for screen folding and the structural support for the hinge mechanism, eliminating the need for separate control circuits and reducing overall device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Area of stationary object

If additional damping structures and control circuits are added, then the driving and damping functions are improved, but the space occupied by the hinge structure increases

Engineering Contradiction:
Improvehinge structure spaceVSAvoidscreen folding smoothness
Core Design Contradiction:
Area of stationary objectVSEase of operation

Solution Approach 1:

The damping function is merged into the driving assembly itself. The driving assembly incorporates damping mechanisms that provide smooth screen folding operation without requiring separate damping structures, thereby reducing the space occupied by the hinge structure while maintaining operational smoothness.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The driving assembly is designed to self-regulate its motion through integrated damping characteristics. The structure automatically provides the necessary damping effects during screen folding without requiring external control circuits or additional damping components, reducing space while ensuring ease of operation.

Inventive Principle:
Principle #25Self-service

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

This solution reduces the space occupied by the hinge structure, simplifies the design by eliminating the need for additional damping and control circuits, and enhances user experience through improved rotation mechanics.

Implementation Method 1

The driving assembly is configured to drive the connecting assembly to move relative to the rotating shaft in at least one of a hydraulic manner or a pneumatic manner

Methodology Applied
Scientific EffectHydraulic manner: Hydraulic Press

Implementation Method 2

The driving assembly is configured to drive the connecting assembly to move relative to the rotating shaft in at least one of a hydraulic manner or a pneumatic manner

Methodology Applied
Scientific EffectPneumatic manner: Gas Compressor

Implementation Method 3

providing damping effects

Methodology Applied
Scientific EffectDamping: Damping

Data Source

PatentUS12028995B2Hinge structure with driving assembly and foldable display device having same
Publication Date: 2024.07.02 BEIJING XIAOMI MOBILE SOFTWARE CO LTD
  • US12028995B2 patent drawing
  • US12028995B2 patent drawing
  • US12028995B2 patent drawing

AI summary

A hinge structure and a foldable display device are provided. The hinge structure includes a rotating shaft, a driving assembly and a connecting assembly. The driving assembly is connected to the connecting assembly and the rotating shaft, respectively, and is configured to drive the connecting assembly to move relatively to the rotating shaft in at least one of a hydraulic manner or a pneumatic manner under the drive of the rotating shaft when the rotating shaft rotates.