Flexible Display Resin Damming for Bendability

Solution Overview

Problem

The use of a resin material to protect the mounting parts of flexible display devices can affect the degree of bendability, leading to products that do not meet quality standards.

Innovation Solution

A manufacturing method involving the formation of a damming part in the component mounting area of a flexible base material, where a resin composition is applied to cover the component mounting area, with the outer periphery of the resin layer contacting the lateral surface of the damming part, ensuring proper protection and quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a resin material is applied to protect the mounting part, then the protection quality is improved, but the bendability of the display panel deteriorates

Engineering Contradiction:

Improveprotection qualityVSAvoidbendability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The resin layer is selectively applied only to the mounting part area where components are mounted, rather than covering the entire display panel. This localized protection approach ensures that the mounting part receives adequate protection while the rest of the flexible base material maintains its bendability. The resin layer is formed to a controlled thickness that balances protection requirements with flexibility preservation.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The thickness of the resin layer is precisely controlled within a specific range (5 µm to 20 µm) to optimize both protection quality and bendability. By adjusting the resin layer thickness parameter, the invention achieves a balance where the mounting part is adequately protected while the overall panel retains sufficient flexibility for bending applications.

Inventive Principle:

Principle #35Parameter changes

2Strength

If a resin material is applied to protect the mounting part, then the mechanical strength is improved, but the uniformity of resin application deteriorates

Engineering Contradiction:

Improvemechanical strengthVSAvoiduniformity of resin application

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

A damming structure is formed in advance on the flexible base material before applying the resin composition. This damming structure creates predetermined boundaries that guide the resin application process, ensuring uniform resin distribution and preventing overflow or uneven thickness. The damming structure is formed as a preliminary step that establishes the framework for subsequent uniform resin coating.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The damming structure serves as an intermediary element between the resin composition and the mounting part. It mediates the resin application process by containing the resin within defined boundaries, ensuring uniform distribution and consistent thickness across the mounting part area while preventing resin from spreading to adjacent areas.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If the resin layer covers the entire mounting area, then the protection is improved, but the bending performance deteriorates

Engineering Contradiction:

ImproveprotectionVSAvoidbending performance

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The resin layer is selectively applied only to the mounting part area where components are mounted, rather than covering the entire display panel. This localized protection approach ensures that the mounting part receives adequate protection while the rest of the flexible base material maintains its bendability. The resin layer is formed to a controlled thickness that balances protection requirements with flexibility preservation.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The display panel is segmented into different functional areas: the mounting part area where the resin layer is applied for protection, and the rest of the flexible base material that remains resin-free to maintain flexibility. This spatial segmentation allows different regions to have different properties - protected and rigid where needed, and flexible where required for bending.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11094759B2Display device and method of manufacturing display device

Publication Date: 2021.08.17 MAGNOLIA WHITE CORP

AI summary

A manufacturing method of a display device according to an embodiment of the present invention includes: forming a damming part in a component mounting area of a flexible base material having a display area provided with a plurality of pixels and the component mounting area where a component is mounted; and applying a resin composition to the component mounting area of the base material in a condition in which the component is mounted thereon, in this order. An outer periphery of the applied resin composition reaches a lateral surface of the damming part.