Screen Printing Mask Edge Barrier for Precise Display Panel Coating
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Solution Overview
Problem
Existing screen printing processes often result in the formation of protective layers at incorrect locations on display panels, leading to inefficiencies and potential damage to non-display areas.
Innovation Solution
A screen printing device and method that includes a blocking member, such as an air blower, to prevent the polymer paste from overflowing and being applied to non-display areas by forming an air or physical barrier at the edge of the mask assembly, ensuring precise application of the protective layer only on the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mask assembly is used for screen printing, then the protective layer can be applied to the display area, but the polymer paste may overflow to non-display areas
Solution Approach 1:
A blocking member is introduced as an intermediary element between the mask assembly and the display panel. This blocking member prevents the polymer paste from overflowing beyond the mask assembly edges while allowing the paste to be applied to the display area through the mask assembly's transmissive areas.
Solution Approach 2:
The blocking member is divided into multiple segments corresponding to different edges of the mask assembly. Each segment independently blocks paste overflow at its respective edge, ensuring comprehensive prevention of paste migration to non-display areas.
2Productivity
If the mask assembly is pressed against the display panel, then the polymer paste can be applied, but the paste may spread to incorrect locations
Solution Approach 1:
The blocking member serves as a mediator that maintains the necessary pressure for paste application while simultaneously defining the precise boundaries of paste spread. It enables efficient screen printing by allowing mask assembly contact with the display panel while preventing paste migration to incorrect locations.
3Device complexity
If no blocking member is used, then the device structure remains simple, but the protective layer may be formed at incorrect locations
Solution Approach 1:
The blocking member is designed as a simple, inexpensive component that can be easily added to the screen printing device. Its straightforward structure and ease of installation make it a cost-effective solution to prevent paste overflow and ensure reliable protective layer formation at correct locations.
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
Prevents the protective layer from being formed at incorrect locations, thereby protecting non-display areas and ensuring accurate application on display panels, enhancing the reliability and integrity of the screen printing process.
Implementation Method 1
the air blower forms an air blocking layer by blowing air from the edge of the mask assembly toward the display panel
Data Source
AI summary
A screen printing device includes a stage on which a display panel is disposed, a mask assembly disposed on the display panel, a coating member for applying a polymer paste onto the mask assembly, a pressing member for bringing the mask assembly into contact with the display panel, and a blocking member disposed at an edge of the mask assembly.