Printing Roller Blanket Drying for LCD Pattern Precision

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Solution Overview

Problem

The existing printing method for LCD devices faces challenges in achieving precise patterns due to deformation of the blanket on the printing roller, caused by the solvent in the pattern material, leading to inaccurate pattern transfer.

Innovation Solution

A printing device system with a drying device that dries the blanket on the printing roller, using a vacuum suction part and temperature controller to maintain optimal drying conditions, minimizing environmental interference and preventing volume changes in the blanket.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a blanket is used on the printing roller to transfer pattern material, then the pattern transfer process is simplified and manufacturing cost is reduced, but the blanket deforms due to solvent dissolution leading to imprecise patterns

Engineering Contradiction:

Improvepattern transfer process simplicityVSAvoidpattern precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by drying the blanket before the pattern material is coated onto it. The drying device removes moisture from the blanket in advance, preventing solvent-induced deformation during the printing process. This preliminary drying step ensures the blanket maintains its dimensional stability throughout pattern transfer, resolving the contradiction between process simplicity and pattern precision.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If the blanket is allowed to remain moist during printing, then the printing process is faster, but the blanket swells and pattern accuracy is lost

Engineering Contradiction:

Improveprinting speedVSAvoidpattern accuracy

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The drying device performs preliminary drying of the blanket before printing, eliminating moisture that would cause swelling. This allows the printing process to proceed quickly without compromising pattern accuracy, as the blanket is already in its optimal dry state to resist solvent-induced deformation.

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If environmental factors are not controlled during printing, then the device complexity is reduced, but the blanket is affected by environmental conditions causing deformation

Engineering Contradiction:

Improveenvironmental control systemVSAvoidenvironmental effect on blanket

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the moisture from the blanket environment using a drying device with vacuum suction and heating elements. By removing moisture from the immediate environment of the blanket and actively drying it, the system prevents environmental factors from causing blanket deformation, resolving the contradiction between device simplicity and environmental resistance.

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

This solution enables precise pattern formation by preventing blanket deformation, ensuring accurate pattern transfer and reducing manufacturing time and costs.

Implementation Method 1

a drying device that dries the blanket of the printing roller

Methodology Applied

Scientific EffectEvaporation: Evaporation

Implementation Method 2

using a vacuum suction part and temperature controller to maintain optimal drying conditions

Methodology Applied

Scientific EffectVacuum suction: Suction

Data Source

PatentUS7536954B2Printing device system and patterning method using the same

Publication Date: 2009.05.26 LG DISPLAY CO LTD

AI summary

A printing device system comprises a printing roller that has a blanket adhered to an outer surface thereof. The printing device system further comprises a drying device that dries the blanket of the printing roller.