Flexible Display Hinge Lever Cover Mechanism

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Solution Overview

Problem

Current flexible display devices with folding structures face challenges in reducing size, achieving slimness, and effectively covering the space between bodies when folded, leading to increased complexity and limitations in design.

Innovation Solution

A hinge structure with a lever mechanism that supports a cover member to cover the space between bodies, allowing the flexible display to fold and unfold while maintaining a compact form, using a lever connected to the hinge portion to rotate and support the cover member, which moves between states to cover the space and apply force to maintain the display's flatness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If a flexible display is disposed over two whole bodies across a folding structure to implement a large screen, then the screen size is increased, but the device size increases and the structure becomes more complex

Engineering Contradiction:
Improvescreen sizeVSAvoidstructure complexity
Core Design Contradiction:
Area of stationary objectVSDevice complexity

Solution Approach 1:

The device is divided into a first body and a second body connected by a hinge portion, allowing the flexible display to be folded between them. This segmentation enables a large screen area while maintaining a compact folded state and simplifying the overall structure compared to having the display span across both bodies in a traditional folding design.

Inventive Principle:
Principle #1Segmentation

2Volume of moving object

If a hinge portion is used to connect two bodies for folding, then the device can be folded to a smaller size, but the space between the two bodies is exposed to the outside in the folding state

Engineering Contradiction:
Improvefolded sizeVSAvoidexposed space
Core Design Contradiction:
Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

A cover member is introduced as an intermediary component between the first body and the second body. This cover member covers the space between the two bodies when folded, preventing exposure while maintaining the compact folded size enabled by the hinge portion.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If various considerations are made for hinge operating structure to control the neutral plane of the display, then the display characteristics are compensated, but the complexity of the overall structure of the hinge portion increases

Engineering Contradiction:
Improvedisplay characteristicsVSAvoidhinge structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The function of controlling the neutral plane and compensating for display characteristics is extracted from the hinge operating structure itself and implemented through the flexible display's inherent flexibility and the simple hinge connection. This eliminates the need for complex length compensating schemes and interlocking structures within the hinge, maintaining structural simplicity while ensuring reliable display performance.

Inventive Principle:
Principle #2Taking out (Extraction)

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 provides a more compact structure, improves the reliability of the flexible display by maintaining flatness, and allows for axial interlocking and free stopping functions, resulting in a smaller bezel and enhanced design flexibility.

Implementation Method 1

a lever connected to the hinge portion to rotate in conjunction with the folding and unfolding of the flexible display unit so as to support at least part of the cover member

Methodology Applied
Scientific EffectLever mechanism: Lever

Implementation Method 2

a lever connected to the hinge portion to rotate in conjunction with the folding and unfolding of the flexible display unit so as to support at least part of the cover member

Methodology Applied
Scientific EffectMechanical advantage: Mechanical Advantage

Implementation Method 3

a hinge portion connecting the first body and the second body in a relatively rotatable manner

Methodology Applied
Scientific EffectRotation:

Implementation Method 4

a cover member disposed between the first body and the second body to cover a space between the first body and the second body formed by the folding of the flexible display unit

Methodology Applied
Scientific EffectMechanical force: Mechanical Force

Data Source

PatentUS10912214B2Flexible display device
Publication Date: 2021.02.02 LG ELECTRONICS INC
  • US10912214B2 patent drawing
  • US10912214B2 patent drawing
  • US10912214B2 patent drawing

AI summary

A flexible display device including a first body and a second body; a hinge portion connecting the first body and the second body in a relatively rotatable manner; a flexible display unit disposed on one side of the first body and the second body to be folded and unfolded by the relative rotation; a cover member disposed between the first body and the second body; and a lever connected to the hinge portion to rotate in conjunction with the folding and unfolding of the flexible display unit and configured to engage the cover member to move the cover member outwards to cover a space between the first body and the second body formed by folding the flexible display unit.