Display Bank Layout for Light-Emitting Ink Overflow Control
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Solution Overview
Problem
Existing display devices face challenges in preventing the overflow of light-emitting element ink, which can lead to inefficiencies and defects in the display's light-emitting elements.
Innovation Solution
A display device design featuring a bank pattern that overlaps with scan and power lines, defining openings for light-emitting element arrangement areas, and a bank surrounding the emission areas to contain the light-emitting elements, ensuring proper alignment and reducing the risk of overflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light-emitting element ink is applied without proper containment structures, then the application process is simple, but ink overflow occurs leading to defects
Solution Approach 1:
The bank structure is segmented into multiple functional parts: a bank body surrounding the emission area, a bank pattern overlapping with scan and power lines, and opening definitions for light-emitting element placement. This segmentation allows each part to serve specific containment and alignment functions, preventing ink overflow while maintaining manufacturing precision.
Solution Approach 2:
The bank and bank pattern are formed as pre-structured containment boundaries before light-emitting element ink application. This preliminary structuring creates defined openings and surrounding barriers that guide ink placement and prevent overflow during the subsequent application process.
2Manufacturing precision
If bank structure is extended to overlap with scan and power lines, then light-emitting element alignment is improved, but manufacturing complexity increases
Solution Approach 1:
The bank pattern serves multiple functions simultaneously: it acts as a containment barrier for ink, provides alignment references for light-emitting elements, and overlaps with scan and power lines to establish precise spatial relationships. This multi-functionality improves alignment without requiring separate dedicated structures for each purpose.
Solution Approach 2:
The bank structure is merged with the scan line and power line patterns, creating an integrated layout where the bank pattern overlaps and aligns with these conductive elements. This merging allows the bank to serve as both a containment structure and an alignment reference system, improving manufacturing precision while reducing the need for additional separate alignment features.
Data Source
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AI summary
A display device comprises a first line extending in a first direction, a second line spaced apart from the first line in a second direction, sub-pixels including emission areas between the first line and the second line, light-emitting elements in light-emitting element arrangement areas in the emission areas, a bank pattern overlapping with the first line and the second line, and defining openings corresponding to the light-emitting element arrangement areas, and a bank surrounding the emission areas, and overlapping with the first line, the second line, and the bank pattern.