Hydrophobic Plate Ink Redirection for Display Partition Walls
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Solution Overview
Problem
The inkjet process for manufacturing display devices can result in defects due to erroneous ink discharge, leading to deteriorated display performance as the ink may be incorrectly positioned on partition walls, affecting the color conversion and filter layers.
Innovation Solution
A method involving the use of a hydrophobic plate to detect and redirect erroneous ink from the main and sub-partition walls into designated dummy accommodation areas, ensuring accurate ink placement within the color filter areas based on position and color matching, thereby preventing incorrect ink positioning on partition walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inkjet process is used to form color conversion layer, then manufacturing precision and automation are improved, but erroneous ink discharge causes defects and deteriorates display performance
Solution Approach 1:
The patent applies preliminary action by pre-configuring dummy accommodation areas adjacent to the color filter areas before ink discharge. These dummy areas are prepared in advance to receive any erroneously discharged ink, preventing it from contaminating the color filter layer. The hydrophobic plates are also pre-positioned to guide ink flow into the dummy areas, ensuring that even if erroneous discharge occurs, the display performance is not compromised.
Solution Approach 2:
The patent introduces hydrophobic plates as intermediary elements between the inkjet discharge points and the color filter areas. These plates act as mediators that redirect erroneously discharged ink into dummy accommodation areas. The hydrophobic coating on these plates creates a barrier that controls ink flow, allowing the system to maintain high automation while compensating for inkjet discharge errors and preserving display quality.
2Reliability
If hydrophobic plate is introduced to redirect erroneous ink, then display performance is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by applying hydrophobic coating only to specific plates that come into contact with erroneously discharged ink, rather than treating the entire manufacturing system. The hydrophobic property is localized to the plates positioned between the inkjet head and the color filter areas. This selective application of hydrophobicity provides the necessary ink redirection function while minimizing the overall complexity of the manufacturing process.
Solution Approach 2:
The patent utilizes thin film technology by applying hydrophobic coatings to plates rather than using bulky mechanical barriers. The hydrophobic film on the plates provides a flexible, thin-layer solution that effectively redirects ink flow without adding significant structural complexity. This approach maintains the simplicity of the manufacturing process while achieving the desired reliability improvement.
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
This approach effectively improves display performance by preventing erroneous ink from interfering with the partition walls, ensuring accurate ink placement and maintaining the integrity of the color conversion and filter layers.
Implementation Method 1
disposing a hydrophobic plate so as to be adjacent to the first erroneous ink based on the main position information; bringing the hydrophobic plate into contact with the main partition wall; and then moving the hydrophobic plate in a direction to the dummy accommodation area, to accommodate the first erroneous ink in the dummy accommodation area
Data Source
AI summary
A method of manufacturing a display device includes: discharging ink onto a substrate including a main partition wall for partitioning a color filter area and a dummy accommodation area adjacent to the color filter area; generating main position information by detecting a position of the first erroneous ink discharged on the main partition wall; disposing a hydrophobic plate so as to be adjacent to the first erroneous ink, based on the main position information; bringing the hydrophobic plate into contact with the main partition wall; and then moving the hydrophobic plate to the dummy accommodation area, to accommodate the first erroneous ink in the dummy accommodation area.