Display Panel Conductive Pattern Enhances Adhesion and Corrosion Resistance
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Solution Overview
Problem
The existing display panels face issues with substrate separation and corrosion of the gate driving part due to decreased adhesive strength and metal corrosion in contact holes, particularly when the width of the seal line is reduced, leading to defects and poor display quality.
Innovation Solution
A display panel design that includes a conductive pattern made of metal or metal oxide between the seal line and the organic layer to enhance adhesive strength and prevent corrosion, with the conductive pattern overlapping the driving part to stabilize the substrates and reduce static charge defects during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the width of the seal line is decreased to reduce the area of the display panel, then the area is reduced, but the adhesive strength between the first substrate and the second substrate is decreased causing substrate separation
Solution Approach 1:
A conductive pattern layer is introduced as an intermediary between the seal line and the organic layer. This conductive pattern serves as a mediator that enhances adhesive strength and prevents substrate separation, allowing the seal line width to be reduced without compromising bonding strength.
Solution Approach 2:
The seal line structure is enhanced by combining multiple materials including the conductive pattern (metal or metal oxide), organic layer, and seal line materials. This composite structure provides both adhesive strength and corrosion prevention functionality.
2Area of stationary object
If the width of the seal line is decreased, then the area is reduced, but corrosion of the gate driving part occurs due to metal contact in contact holes
Solution Approach 1:
The conductive pattern acts as a protective intermediary layer between the metal contacts in the gate driver and the environment. This layer prevents direct exposure to corrosive elements while maintaining electrical connectivity, thus preventing corrosion of the gate driving part.
Solution Approach 2:
The conductive pattern changes the physical and chemical parameters of the interface between metal contacts and the environment. By introducing this conductive layer, the corrosion resistance is improved while maintaining the electrical functionality of the gate driver.
3Reliability
If a thick organic layer is formed to prevent metal corrosion, then corrosion prevention is improved, but the area of the display panel increases
Solution Approach 1:
The conductive pattern serves as an additional intermediary layer between the metal contacts and the organic layer/environment. This provides enhanced corrosion protection through multiple protective interfaces without requiring an excessively thick organic layer.
Solution Approach 2:
The protection system uses a composite structure combining the conductive pattern layer with the organic layer. This multi-layer composite provides superior corrosion prevention compared to a single thick organic layer, allowing for optimized thickness and reduced overall area.
Data Source
AI summary
A display panel includes a first substrate, a thin-film transistor (TFT), an organic layer, a second substrate, a seal line, and a conductive pattern. The first substrate includes a pixel part and a driving part connected to the pixel part. The TFTs are formed in the pixel part and the driving part. The organic layer is formed on the first substrate having the TFTs formed thereon. The second substrate is opposite to the first substrate. The seal line is disposed between an edge portion of the first substrate having the organic layer formed thereon and an edge portion of the second substrate. The seal line combines the first substrate with the second substrate. The conductive pattern is disposed between the seal line and the organic layer.