Color Conversion Substrate With Partition Walls for Ink Containment
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Solution Overview
Problem
The inkjet process for forming a color conversion substrate in display devices can result in ink misplacement, leading to the loss of banks and ink flow-out, which causes dark spots due to excessive ink accumulation.
Innovation Solution
A color conversion substrate with a bank defining first and second opening areas, and a partition wall in the second opening area dividing it into smaller sub-opening areas, accommodating misplaced ink and maintaining ink thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a second opening area is formed adjacent to the first opening area to prevent ink misplacement, then ink misplacement is prevented, but the bank between the first and second opening areas is lost during manufacturing, causing ink to flow out and create dark spots
Solution Approach 1:
The second opening area is divided into multiple sub-opening areas by partition walls, segmenting the space to prevent ink flow between adjacent openings while maintaining the bank structure's integrity
Solution Approach 2:
Partition walls are introduced as intermediary structures between the first and second opening areas, acting as barriers that prevent ink from flowing across the bank while allowing each opening area to function independently
2Area of stationary object
If the bank width between first and second opening areas is reduced to accommodate more openings, then device area is reduced, but ink may flow out when the bank is lost, causing dark spots
Solution Approach 1:
By dividing the second opening area into multiple smaller sub-opening areas, the ink volume in each compartment is reduced, preventing overflow and dark spot formation even when bank width is minimized
Solution Approach 2:
Different regions of the opening areas have different functions: the first opening area accommodates color conversion particles while the second opening area with partition walls provides localized containment for misplaced ink, ensuring uniform ink thickness across different regions
Data Source
AI summary
A color conversion substrate includes: a bank defining a first opening area and a second opening area; a conversion part disposed in the first opening area and including a color conversion particle; and a partition wall disposed in the second opening area and dividing the second opening area into a plurality of sub-opening areas.