Display Panel Color Filter Adhesion via Local Protrusions
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Solution Overview
Problem
The existing technologies for touch display devices face limitations in reducing delamination between layers due to decreased interlayer adhesion, particularly when forming touch electrodes and color filters at low temperatures, which can lead to damage and delamination issues during the peeling off of protection films.
Innovation Solution
A display panel design that includes a substrate with an encapsulation layer, a bridge, a first insulating layer, a touch electrode, a touch buffer layer, and a color filter, where the color filter is in direct contact with the first insulating layer through specific holes, enhancing interlayer adhesion and preventing delamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the touch electrode and color filter are formed at low temperature to prevent damage to the light emitting device, then the light emitting device is protected from damage, but the interlayer adhesion is lowered and delamination between layers can occur
Solution Approach 1:
The patent applies local quality by creating a protrusion structure at specific locations where the color filter contacts the first insulating layer. This localized structural modification enhances adhesion only at critical contact points without requiring overall high-temperature processing, thus protecting the light emitting device while improving interlayer adhesion where needed.
Solution Approach 2:
The protrusion structure is formed in advance during the manufacturing process before the color filter is applied. This preliminary action creates a pre-designed adhesion enhancement feature that ensures strong bonding between the color filter and first insulating layer, preventing delamination issues that would otherwise occur with low-temperature formation.
2Length of stationary object
If the touch electrode and color filter are formed after forming the light emitting device to embed them in the display panel, then the thickness and weight are reduced, but delamination between layers can occur due to decreased interlayer adhesion
Solution Approach 1:
Rather than uniformly increasing adhesion across the entire panel (which would require additional layers or materials), the patent applies adhesion enhancement locally at the contact points between the color filter and first insulating layer through protrusions. This maintains the overall thin profile while addressing delamination at critical interfaces.
3Reliability
If the color filter is in direct contact with the first insulating layer through holes, then interlayer adhesion is enhanced and delamination is reduced, but the structural complexity increases
Solution Approach 1:
The patent segments the contact interface between the color filter and first insulating layer by creating multiple discrete protrusions rather than a continuous complex structure. This segmentation approach enhances adhesion through distributed contact points while keeping the overall structure relatively simple and manufacturable.
Data Source
AI summary
A display panel and a display device capable of reducing peeling due to a decrease in interlayer adhesion by direct contact of a color filter with a first insulating layer are provided.