Shielding Adhesive Layer Corner Exposure for Display Panel Stress Relief

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Solution Overview

Problem

Conventional display devices are prone to deformation and damage due to stress concentration at the corner portions of the display panel, especially when connected to flexible circuit boards, and this vulnerability is exacerbated during manufacturing processes that require separation of the display panel from the base.

Innovation Solution

A display device design featuring a shielding adhesive layer that does not cover the corner portions of the border area, allowing direct exposure to the base, and a manufacturing method that includes positioning and affixing this layer to prevent stress-induced damage and facilitate easier separation of the display panel from the base.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the adhesive layer is distributed along the edge of the base to prevent blocking light, then light transmission is improved, but the corner portion becomes vulnerable to stress concentration and damage

Engineering Contradiction:

Improvelight transmissionVSAvoidcorner portion durability

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The adhesive layer is segmented to exclude the corner portions from the bonding area. The adhesive layer is positioned only in the border area excluding corners, creating a non-contiguous bonding pattern that prevents stress concentration at corners while maintaining light transmission through the backlight module.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The corner portions are extracted from the adhesive layer coverage area. By intentionally leaving the corner portions unattached to the base, the design removes the source of stress concentration and vulnerability, allowing these areas to be separated for further processing without causing damage.

Inventive Principle:

Principle #2Taking out (Extraction)

2Stability of the object's composition

If the adhesive layer affixes the display panel to the base securely, then structural stability is improved, but the display panel becomes difficult to separate for further processing

Engineering Contradiction:

Improvestructural stabilityVSAvoidseparation for further processing

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The adhesive layer is segmented to provide partial bonding only in specific areas (border area excluding corners). This segmentation allows the display panel to be stable during assembly while enabling easy separation at corner portions for further processing operations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The corner portions are extracted from the adhesive bonding area, creating intentional separation points. This allows the display panel to be easily separated from the base at these corner areas for further processing, while maintaining sufficient structural stability in the bonded regions.

Inventive Principle:

Principle #2Taking out (Extraction)

3Strength

If the adhesive layer covers the entire border area including corners, then bonding strength is improved, but stress concentration causes increased damage risk at corner portions

Engineering Contradiction:

Improvebonding strengthVSAvoidstress concentration damage

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The adhesive layer application is differentiated by location. The border area (excluding corners) receives adhesive coverage for bonding strength, while corner portions are intentionally left uncovered to avoid stress concentration and associated damage.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The corner portions are extracted from the adhesive coverage area. This selective exclusion removes the harmful stress concentration effect at corners while maintaining bonding strength in the border areas where adhesive application is beneficial.

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 effectively reduces the risk of corner portion damage from stress and simplifies the separation process, thereby enhancing the durability and manufacturability of display devices.

Implementation Method 1

an adhesive layer 70 is disposed between the display panel 30 and the base 10

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS7880827B2Display device with shielding adhesive layer and a method for manufacturing thereof

Publication Date: 2011.02.01 AU OPTRONICS CORP

AI summary

A display device and a manufacture method thereof are provided. The display device includes a base, a display panel, and a shielding adhesive layer. The display panel is disposed on the base. The display panel includes an active area and a border area enclosing the active area, wherein the border area has a corner portion. The shielding adhesive layer is disposed between the base and the display panel and distributed on the border area. The shielding adhesive layer does not extend to the corner portion and therefore directly exposes the corner portion to the base.