Bezel Pattern Formation Using Release Film Segmentation

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Solution Overview

Problem

The existing methods for forming bezel patterns on display panels are complex and costly, with high manufacturing costs and performance issues due to the complexity of the processes used, such as photolithography and screen printing.

Innovation Solution

A method involving a release film with separable pattern and non-pattern portions, where the release film is attached to a panel, and the pattern is printed before selectively removing the film, allowing for improved adhesion control and reduced process complexity, using techniques like mechanical removal, solvent immersion, heat, or UV irradiation to achieve precise pattern formation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If photolithography method or screen printing method is used to form bezel pattern, then pattern formation is achieved, but process complexity increases and manufacturing cost increases

Engineering Contradiction:

Improvebezel pattern formationVSAvoidprocess complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The release film is divided into a pattern portion and a non-pattern portion that are separable from each other. This segmentation allows the pattern to be pre-formed on the release film before attachment to the panel, eliminating the need for complex photolithography or screen printing processes on the panel itself.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The bezel pattern is printed on the release film in advance before the release film is attached to the panel. This preliminary action simplifies the overall process by transferring the pattern formation step to a separate, simpler operation performed on the release film rather than requiring complex processes on the panel.

Inventive Principle:

Principle #10Preliminary action

2Manufacturing precision

If photolithography method or screen printing method is used to form bezel pattern, then pattern formation is achieved, but manufacturing cost increases

Engineering Contradiction:

Improvebezel pattern formationVSAvoidmanufacturing cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The release film serves as a disposable carrier for the pattern. By printing the pattern on the inexpensive release film and then removing it after transfer, the method avoids the need for expensive, complex manufacturing equipment while achieving precise pattern formation.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Device complexity

If release film is used with separable pattern and non-pattern portions, then process complexity is reduced, but adhesion control becomes more challenging

Engineering Contradiction:

Improveprocess complexityVSAvoidadhesion control

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The release film has different adhesion properties in different regions: the pattern portion is designed to be separable from the non-pattern portion. This local differentiation of adhesion quality allows selective removal of the pattern portion while maintaining the non-pattern portion, achieving both process simplification and reliable adhesion control.

Inventive Principle:

Principle #3Local quality

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 method simplifies the process, reduces costs, and enhances the performance of the bezel pattern by achieving sharper edges and lower line heights, thereby improving display panel durability and reducing crack formation.

Implementation Method 1

removing the release film from the panel after cutting the panel according to the form of a bezel pattern after printing the bezel pattern

Methodology Applied

Scientific EffectMechanical removal:

Implementation Method 2

using techniques like mechanical removal, solvent immersion, heat, or UV irradiation to achieve precise pattern formation

Methodology Applied

Scientific EffectSolvent immersion:

Implementation Method 3

using techniques like mechanical removal, solvent immersion, heat, or UV irradiation to achieve precise pattern formation

Methodology Applied

Scientific EffectHeat: Heating

Implementation Method 4

using techniques like mechanical removal, solvent immersion, heat, or UV irradiation to achieve precise pattern formation

Methodology Applied

Scientific EffectUV irradiation: Absorption (EM radiation)

Data Source

PatentEP2874137B1Method of forming a bezel pattern of a display panel

Publication Date: 2021.03.03 LG CHEM LTD

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AI summary

Provided is a method for forming a bezel pattern of a display panel, the method including: attaching a release film including a non-pattern portion to a panel; printing at least one bezel pattern by applying an ink composition on the panel; and removing the release film from the panel.