Silicon Sealant Coating Support for OLED Screen Uniformity
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Solution Overview
Problem
The existing methods for printing silicon sealant on OLED devices often result in poor uniformity of height and width, leading to product defects such as cracks, bubbles, and Newton rings due to lack of support on the lower surface of the screen during the coating process.
Innovation Solution
A device comprising a coating device, a horizontal coating stage, and an elevating device that adjusts the height of the coating stage to ensure full contact with the screen, allowing the coating device to uniformly apply silicon sealant into a pattern area, which is then scraped onto a substrate, providing support and ensuring complete filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the screen is not supported from below during coating, then the coating process is simpler, but the uniformity of silicon sealant height and width deteriorates
Solution Approach 1:
A support device is introduced as an intermediary between the coating device and the screen. This support device provides upward support to the screen during the coating process, ensuring the screen remains stable and horizontal, which directly improves the uniformity of silicon sealant height and width without complicating the coating process itself.
2Device complexity
If the screen lacks support during coating, then the device structure is simpler, but product defects such as cracks and bubbles increase
Solution Approach 1:
The support device acts as a mediator that prevents direct contact between the coating device and the screen, providing stable support from below. This intermediary structure ensures the screen maintains its position during coating, preventing defects like cracks and bubbles, while adding minimal complexity to the overall device structure.
3Manufacturing precision
If the screen is fully supported during coating, then the filling completeness improves, but the device complexity increases
Solution Approach 1:
The support device serves as a simple intermediary structure that provides full support to the screen during coating. This ensures complete filling of the silicon sealant without requiring complex device modifications, as the support mechanism is straightforward and integrates easily into the existing coating system.
Data Source
AI summary
A device for printing silicon sealant, including a coating device, a horizontal coating stage, and an elevating device, wherein: the elevating device is connected with the horizontal coating stage and is configured to adjust the height of the horizontal coating stage; the horizontal coating stage can be moved to a position right below a screen and fully contacted with the screen under the adjustment of the elevating device; and the coating device is configured to be moved to a position above the screen to coat silicon sealant in a pattern area of the screen after the horizontal coating stage is fully contacted with the screen.