Bank Structure Layout for Fewer Display Manufacturing Steps
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Solution Overview
Problem
Existing display devices face challenges in efficiently integrating light emitting elements and circuit elements without increasing the number of manufacturing processes.
Innovation Solution
The display device incorporates a substrate with defined emission and non-emission areas, utilizing bank structures formed in the same process as circuit elements or wirings, allowing for the integration of light emitting elements and circuit elements without overlapping in the thickness direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bank structures and circuit elements are formed in separate processes, then manufacturing precision is improved, but the number of manufacturing processes increases
Solution Approach 1:
The patent merges the formation of bank structures and circuit elements into a single manufacturing process. The bank structure and circuit element are formed simultaneously in the same process step, eliminating the need for separate processes while maintaining manufacturing precision through integrated patterning and material deposition.
Solution Approach 2:
The patent employs universal manufacturing steps that serve multiple functions. A single process sequence is designed to create both the bank structure defining the emission area and the circuit elements in the non-emission area, making the manufacturing process multi-functional and reducing overall process count.
2Device complexity
If light emitting elements and circuit elements are integrated in the same area, then device complexity is reduced, but manufacturing precision deteriorates
Solution Approach 1:
The patent segments the substrate into distinct emission areas and non-emission areas. The bank structure physically divides these regions, allowing light emitting elements to be positioned in emission areas while circuit elements are formed in non-emission areas. This spatial segmentation reduces device complexity by organizing components into functional zones while maintaining manufacturing precision through area-specific processing.
Data Source
AI summary
A display device includes a substrate; a first bank structure and a second bank structure spaced from each other on the substrate; a first electrode on the first bank structure and a second electrode on the second bank structure; and a light emitting element located between the first electrode and the second electrode, wherein the first bank structure includes a base layer, an upper layer on the base layer, and an intermediate layer between the base layer and the upper layer, and the first electrode covers the first bank structure.