Protective Pattern Shields Link Lines During Laser Cutting
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Solution Overview
Problem
The challenge in fabricating flexible OLED displays is the damage to link lines during the cutting process of the upper film, which can lead to defective images due to the direct exposure of the laser beam to the region where these lines are formed, especially when using a laser cutting method.
Innovation Solution
A protective pattern is formed on the lower surface of the upper film corresponding to the boundary region where link lines are located, made of metal, to prevent damage from the laser beam during the cutting process, ensuring the link lines remain intact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a laser cutting method is used to cut the upper film, then the cutting precision and efficiency are improved, but the link lines in the boundary region may be damaged by direct laser exposure
Solution Approach 1:
A protective pattern is introduced as an intermediary element between the laser beam and the link lines. This pattern absorbs or deflects the laser energy, preventing direct exposure of the link lines while allowing the laser cutting process to proceed efficiently. The protective pattern serves as a mediator that protects the sensitive link lines during the cutting operation.
Solution Approach 2:
The protective pattern is formed in advance on the lower surface of the upper film at the boundary region before the laser cutting process. This preliminary action ensures that when the laser beam is applied, the link lines are already protected, allowing the cutting to proceed without risk of damage to the underlying link lines.
2Ease of operation
If the upper film is cut to expose the driving circuit unit, then the connection to PCB is enabled, but the link lines in the boundary region are exposed to laser damage
Solution Approach 1:
The protective pattern is applied locally only at the boundary region where link lines are present, rather than across the entire upper film. This local application provides targeted protection to the vulnerable link lines while allowing the laser to cut the rest of the upper film to expose the driving circuit unit for PCB connection.
Solution Approach 2:
The protective pattern acts as a localized intermediary that shields the link lines from laser damage in the boundary region, enabling the cutting process to proceed safely and provide access to the driving circuit unit without compromising link line integrity.
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
The protective pattern effectively shields the link lines from laser damage, ensuring stable operation and enhanced reliability of the flat panel display device by preventing signal transfer disruptions.
Implementation Method 1
shooting a laser beam to a region in which the protective pattern is formed from an upper side of the display panel on which the upper film is attached
Data Source
AI summary
Discussed is a flat panel display device in which a protective pattern is formed on a lower surface of an upper film so that when the upper film is cut, link lines of a display panel formed in a cutting region is not damaged.