Display Laminate Roll-to-Roll Processing via Spray Cleaning

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Solution Overview

Problem

Existing methods for processing display laminate to create functional electronic displays are time-consuming and prone to damaging the front electrode, especially when handling high quantities, and lack efficient solutions for continuous roll-to-roll processing.

Innovation Solution

A method and apparatus that involve cutting and removing sections of the protective film layer and display material layer using a spray medium in a roll-to-roll process, allowing for the establishment of electrical contact between driving electronics and the front electrode without damaging the ITO electrode, and incorporating a cutting, wetting, and drying unit for efficient processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual cleaning with solvent is used to remove display material, then the front electrode is protected from damage, but the processing time is excessive and throughput is low

Engineering Contradiction:

Improvefront electrode integrityVSAvoidprocessing throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent replaces the manual mechanical cleaning process with an automated spray system that delivers cleaning medium to the display material. This substitution maintains gentle cleaning action while dramatically increasing throughput by automating the process and enabling continuous processing of multiple displays simultaneously.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent applies a cutting step before the cleaning step to pre-expose the front electrode area by removing the protective film. This preliminary action facilitates the subsequent cleaning process by allowing the spray medium to directly contact and remove display material more efficiently, while still protecting the electrode during the cutting phase.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If automated spray cleaning is used to increase throughput, then processing speed improves, but risk of damaging the thin ITO electrode increases

Engineering Contradiction:

Improveprocessing throughputVSAvoidelectrode damage risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent carefully controls the parameters of the spray system including spray pressure, spray angle, and medium flow rate to ensure effective cleaning while preventing damage to the thin ITO electrode. The cutting depth is also precisely controlled to expose only the necessary area without compromising the electrode integrity.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a cutting step as an intermediary process that creates a controlled exposure zone. This intermediary action allows the spray medium to be applied in a controlled manner to the exposed area, facilitating efficient cleaning while the surrounding protective film continues to shield the electrode from direct spray impact.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If roll-to-roll continuous processing is implemented, then manufacturing efficiency increases, but process complexity and equipment requirements increase

Engineering Contradiction:

Improvemanufacturing efficiencyVSAvoidprocessing equipment complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent divides the processing into distinct sequential stages: a cutting unit that removes protective film sections, and a cleaning unit that applies spray medium. This segmentation allows each unit to be optimized independently while working together in a continuous roll-to-roll process, managing complexity through modular design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The apparatus is designed to process continuous rolls of display laminates, making it universally applicable to high-volume manufacturing. The same equipment handles multiple displays continuously through the roll-to-roll process, achieving multi-functionality and high efficiency without requiring separate processing stations for each display.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 significantly increases throughput and quality of processed products, enabling higher efficiency and quality in creating functional display elements while maintaining the integrity of the front electrode, and is specifically designed for continuous roll-to-roll processing.

Implementation Method 1

The section of display material layer is removed by spraying medium to the section to be removed

Methodology Applied

Scientific EffectSolvation: Solvation

Data Source

PatentUS10661547B2Display laminate formed as a continuous web

Publication Date: 2020.05.26 MARIELLA LABELS

AI summary

A display laminate which includes a front electrode layer, a display material layer and a protective film layer, wherein the protective film layer and the display material layer are narrower than the front electrode layer and wherein the protective film layer and the display material layer have a common edge with the front electrode layer on a first side and a common edge with each other but not with the front electrode layer on an opposite side.