Flexible Display Adhesive Layer Stress Relief

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Solution Overview

Problem

Flexible displays with attached films experience stress when bent, which can lead to deformation and reduced functionality.

Innovation Solution

A flexible display device with an adhesive layer that avoids blank areas on the surface, reducing stress transmission when the device is bent by positioning the adhesive layer to align with the direction of blank areas.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a film is attached to the flexible display for reinforcement, then the flattening of the display becomes easier, but the stress of the film exerts negative influence on the display when bent

Engineering Contradiction:

Improvestructural reinforcementVSAvoidstress influence when bent

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The adhesive layer is segmented into multiple regions with different patterns. Some regions have adhesive material while others have blank areas, creating a segmented structure that allows stress relief while maintaining reinforcement in critical areas.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the adhesive layer have different local qualities - some areas provide strong adhesion for structural reinforcement while other areas with blank patterns provide stress relief during bending, allowing each region to serve its specific function.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If the adhesive layer is provided avoiding blank areas, then stress transmission is reduced when bent, but the structural reinforcement may be compromised

Engineering Contradiction:

Improvestress transmissionVSAvoidstructural reinforcement

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The adhesive layer is divided into adhesive regions and blank regions, creating a segmented pattern that simultaneously achieves stress reduction and structural reinforcement by distributing adhesive material strategically across the film.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The adhesive layer's physical parameters are changed by introducing blank areas that alter the stress distribution characteristics, allowing the same adhesive material to provide both reinforcement and stress relief functions through parameter modification.

Inventive Principle:

Principle #35Parameter changes

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 configuration minimizes stress on the film, enhancing the durability and functionality of the display device when folded or bent.

Implementation Method 1

a film (62) attached to the flexible display (56) with the adhesive layer (64)

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS10121979B2Display device

Publication Date: 2018.11.06 MAGNOLIA WHITE CORP

AI summary

A display device includes: a flexible display including a flexible substrate and a plurality of light emitting elements provided on the flexible substrate; an adhesive layer; and a film attached to the flexible display with the adhesive layer. The adhesive layer is provided avoiding a plurality of blank areas linearly arranged in at least one direction on a surface of the flexible display.