Flexible Display Liner Layer Zoning for Dust-Free Laser Separation

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Solution Overview

Problem

The manufacturing process of flexible display panels often results in fine dust contamination due to laser separation, which complicates maintaining a clean processing atmosphere.

Innovation Solution

A motherboard for flexible display panels is designed with a liner layer having distinct zones, where the first zone at the edge region has lower laser absorptivity and critical energy compared to the second zone, allowing for selective separation of the liner layer from the carrier substrate while minimizing dust dispersal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If laser irradiation is used to separate the liner layer from the carrier substrate, then the separation efficiency is improved, but fine dust is generated contaminating the surrounding processing atmosphere

Engineering Contradiction:

Improveseparation efficiencyVSAvoidfine dust contamination

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The liner layer is divided into a first zone (edge region) and a second zone (central region) with different laser absorptivity characteristics. The first zone has lower laser absorptivity and remains attached to the carrier substrate, while the second zone has higher laser absorptivity and separates cleanly, preventing dust generation at the edges.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the liner layer are given different optical properties: the edge region (first zone) has lower laser absorptivity to remain attached and trap potential dust, while the central region (second zone) has higher laser absorptivity for efficient separation. This local differentiation resolves the contradiction between separation efficiency and dust prevention.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If the liner layer is completely separated from the carrier substrate, then the flexible display panel is fully released, but fine dust is dispersed into the surrounding environment

Engineering Contradiction:

Improvepanel release completenessVSAvoiddust dispersal

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The separation process is segmented into two functional zones: the first zone (edge) remains attached to retain dust, while the second zone (center) separates to release the panel. This segmentation allows partial separation that achieves both goals.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first zone of the liner layer acts as an intermediary that remains attached to the carrier substrate, serving as a dust-trapping mechanism while allowing the second zone to separate and release the flexible display panel.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If the liner layer has high laser absorptivity throughout, then separation is achieved with lower laser energy, but fine dust is generated at the edges during separation

Engineering Contradiction:

Improvelaser energy efficiencyVSAvoidedge dust generation

Core Design Contradiction:

Use of energy by moving objectVSObject-generated harmful factors

Solution Approach 1:

The liner layer exhibits local quality variation in laser absorptivity: the edge region has lower absorptivity to prevent dust generation, while the central region has higher absorptivity for energy-efficient separation. This local differentiation resolves the energy-dust contradiction.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The liner layer is segmented into zones with different laser absorptivity, allowing the central zone to separate efficiently with lower overall laser energy while the edge zone remains attached to prevent dust generation.

Inventive Principle:

Principle #1Segmentation

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 approach effectively prevents fine dust from contaminating the surrounding environment by ensuring the liner layer of the first zone remains attached during separation, facilitating a cleaner manufacturing process.

Implementation Method 1

the liner layer of the first zone has a laser absorptivity lower than that of the liner layer of the second zone

Methodology Applied

Scientific EffectLaser absorptivity: Absorption (EM radiation)

Data Source

PatentUS9570692B2Motherboard of flexible display panel and method for manufacturing flexible display panel

Publication Date: 2017.02.14 BOE TECHNOLOGY GROUP CO LTD

AI summary

A motherboard of flexible display panel and the method for manufacturing the flexible display panel are provided, the motherboard of flexible display panel includes a carrier substrate and at least one flexible display panel unit formed on the carrier substrate; the flexible display panel unit includes a liner layer, a flexible substrate and a display element; the liner layer includes a first zone and a second zone, the liner layer of the first zone has a laser absorptivity lower than that of the liner layer of the second zone, and the liner layer of the second zone has a critical energy no larger than that of the liner layer of the first zone; the first zone is located at the edge region of the flexible display panel unit.