Selective Edge Curing Adhesive for Display Lamination
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Solution Overview
Problem
Existing display device manufacturing processes face challenges in achieving high adhesive strength and reliability between the display panel and the window member, while also improving process efficiency and productivity.
Innovation Solution
The proposed apparatus and method involve applying an adhesive material onto a release film, selectively curing the edge portion of the adhesive, laminating the display panel, forming an adhesive member by fully curing the adhesive, and then laminating the window member, thereby enhancing adhesive strength and process efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive material is applied between display panel and window member, then adhesive strength is improved, but process complexity increases due to alignment and plasma treatment requirements
Solution Approach 1:
The adhesive material is applied in advance onto a release film before the actual lamination process. This preliminary application allows the adhesive to be prepared and positioned beforehand, reducing the complexity of real-time alignment during lamination and eliminating the need for plasma treatment while maintaining strong adhesion.
Solution Approach 2:
A release film is introduced as an intermediary carrier between the adhesive material and the final bonding surfaces. The adhesive is applied on the release film, which then facilitates easy transfer and positioning during lamination, simplifying the overall process by decoupling adhesive application from the lamination alignment step.
2Reliability
If selective curing of edge portion is performed, then adhesive reliability is improved, but process time increases
Solution Approach 1:
The edge portion of the adhesive material is selectively cured in advance before complete lamination. This preliminary curing of the edges ensures reliable bonding at the periphery while the center remains uncured for flexibility during lamination, achieving both reliability and process efficiency.
Solution Approach 2:
Different regions of the adhesive material receive different treatment: the edge portions are selectively cured to provide reliable bonding, while the center portion remains uncured to maintain flexibility during the lamination process. This local differentiation optimizes both reliability and processability.
3Strength
If complete curing of adhesive is performed before lamination, then adhesive strength is maximized, but flexibility during alignment is reduced
Solution Approach 1:
The adhesive material exhibits different states in different regions: the edge portions are cured to provide strong bonding, while the center portion remains uncured to maintain flexibility. This local quality differentiation allows the adhesive to provide both strength and alignment flexibility simultaneously.
Solution Approach 2:
Selective curing of the edge portions is performed in advance before complete lamination, while leaving the center portion uncured. This preliminary partial curing provides enough bonding strength for handling while maintaining flexibility for alignment during the lamination process.
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 improves the adhesive strength and reliability between the display panel and the window member, while also increasing process efficiency and productivity by minimizing the need for complex alignment and plasma treatment processes.
Implementation Method 1
a first curing device which irradiates the adhesive material with light
Implementation Method 2
a second curing device which entirely cures the adhesive material included in the subject on which the display panel is laminated
Data Source
AI summary
An apparatus for manufacturing a display device includes an application head which applies an adhesive material to a subject, and a selective curing module which curs a portion of the adhesive material, where the selective curing module cures an edge portion of the adhesive material.