Conductive Support Structure for Foldable Display ESD Protection

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Solution Overview

Problem

Foldable mobile phone displays face challenges in preventing film wrinkling during folding, requiring additional support for mechanical strength and heat dissipation, while also needing electrostatic discharge protection to prevent damage from static electricity.

Innovation Solution

A display device design featuring conductive supporting portions electrically connected via a bonding and conductive connecting portion, which can include conductive adhesive or glue, to ground the device and dissipate static electricity, while also enhancing mechanical strength and heat dissipation with materials like steel and copper foil.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If additional support structures are added to prevent film wrinkling during folding, then mechanical strength is improved, but device complexity increases

Engineering Contradiction:
Improvemechanical strengthVSAvoiddevice complexity
Core Design Contradiction:
StrengthVSDevice complexity

Solution Approach 1:

The patent combines the support structure with the electrostatic discharge protection function by integrating a conductive layer into the support structure. This conductive support structure serves dual purposes: providing mechanical strength to prevent film wrinkling during folding and conducting static electricity to ground, thereby eliminating the need for separate support structures and reducing device complexity.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The conductive support structure is designed to perform multiple functions simultaneously: it acts as a mechanical support to prevent film wrinkling, provides electrostatic discharge protection by conducting static electricity to ground, and can also serve as a heat dissipation pathway. This multi-functionality reduces the need for additional separate components.

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

2Reliability

If conductive materials are added for electrostatic discharge protection, then electrostatic discharge protection is improved, but heat dissipation capability worsens

Engineering Contradiction:
Improveelectrostatic discharge protectionVSAvoidheat dissipation capability
Core Design Contradiction:
ReliabilityVSTemperature

Solution Approach 1:

The patent applies conductive materials selectively in specific regions where electrostatic discharge protection is most needed, rather than uniformly across the entire display structure. The conductive layer is positioned at strategic locations to provide effective static electricity conduction to ground while minimizing the overall heat dissipation impact.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent uses composite material structures that combine conductive properties with heat dissipation capabilities. By integrating conductive layers with materials that have good thermal conductivity, the structure achieves both electrostatic discharge protection and effective heat dissipation, resolving the contradiction between these two requirements.

Inventive Principle:
Principle #40Composite materials

3Reliability

If conductive adhesive is applied to connect supporting portions, then electrical connectivity is improved, but manufacturing precision requirements increase

Engineering Contradiction:
Improveelectrical connectivityVSAvoidmanufacturing precision
Core Design Contradiction:
ReliabilityVSManufacturing precision

Solution Approach 1:

The patent introduces conductive adhesive as an intermediary material to connect the conductive supporting portions. This conductive adhesive serves as a mediator that provides both mechanical bonding and electrical conductivity, allowing for flexible connection with relatively low precision requirements compared to direct mechanical connections. The adhesive fills gaps and accommodates minor dimensional variations while maintaining reliable electrical connectivity.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 effectively prevents film wrinkling, enhances mechanical strength, and protects against electrostatic discharge, improving the stability and operational life of foldable display devices.

Implementation Method 1

a conductive connecting portion for electrically connecting the first conductive supporting portion and the second conductive supporting portion

Methodology Applied
Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

the bonding portion includes a conductive adhesive

Methodology Applied
Scientific EffectAdhesion: Adhesive

Data Source

PatentUS12048131B2Display device
Publication Date: 2024.07.23 CHENGDU BOE OPTOELECTRONICS TECH CO LTD
  • US12048131B2 patent drawing
  • US12048131B2 patent drawing
  • US12048131B2 patent drawing

AI summary

The present disclosure relates to a display device. The display device includes a display panel having a display side and a non-display side opposite to the display side, a first conductive supporting portion located on the non-display side of the display panel, a second conductive supporting portion located on a side of the first conductive supporting portion away from the display panel, a bonding portion between the first conductive supporting portion and the second conductive supporting portion, and a conductive connecting portion for electrically connecting the first conductive supporting portion and the second conductive supporting portion.