Display Device Bank Patterns for Overlay-Defect Color Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices suffer from light leakage and color mixing due to overlay defects in color filter layers.
Innovation Solution
The display device incorporates bank patterns with a specific structure, including semiconductor layers and active layers, and features a color conversion layer and color filter layer disposed between these patterns to minimize light leakage and color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional color filter layer is used without bank patterns, then the manufacturing process is simpler, but light leakage and color mixing occur due to overlay defects
Solution Approach 1:
The introduction of bank patterns divides the display structure into distinct regions, creating physical separation between adjacent color filter elements. This segmentation prevents light from leaking between adjacent pixels and eliminates color mixing caused by overlay misalignment, directly resolving the technical contradiction by improving manufacturing precision through structural division.
Solution Approach 2:
The bank patterns are strategically positioned at specific locations where light leakage and color mixing problems occur, rather than requiring complete precision across the entire display. This localized approach addresses overlay defects only where they impact performance, improving manufacturing precision in critical areas without proportionally increasing overall device complexity.
2Reliability
If bank patterns are introduced to prevent light leakage, then display quality improves, but the manufacturing process becomes more complex
Solution Approach 1:
The bank patterns are integrated with the existing color filter layer and substrate structure, combining multiple functions into a unified design. The bank patterns serve both as structural elements for preventing light leakage and as part of the overall manufacturing process, reducing the need for separate manufacturing steps and maintaining ease of manufacture while improving display quality.
Solution Approach 2:
The bank patterns act as intermediary structures between the color filter layer and the surrounding environment, mediating the interaction between light and the display elements. This intermediary role allows the bank patterns to prevent light leakage and improve reliability without requiring fundamental changes to the manufacturing process, maintaining ease of manufacture.
3Device complexity
If the color filter layer is positioned without bank patterns, then the device structure is simpler, but overlay defects cause color mixing
Solution Approach 1:
The bank patterns segment the color filter layer into isolated regions, preventing color mixing between adjacent elements. This segmentation maintains structural simplicity by using basic geometric patterns while achieving high manufacturing precision in color reproduction, as the bank patterns can be formed using standard fabrication techniques.
Solution Approach 2:
The bank patterns are placed locally at positions where color mixing would occur, rather than requiring complex adjustments to the entire color filter layer. This localized approach maintains overall structure simplicity while achieving high color accuracy in critical areas, resolving the contradiction between structural simplicity and manufacturing precision.
Data Source
AI summary
A display device includes bank patterns disposed on a substrate, light emitting elements disposed between side surfaces of the bank patterns on the substrate, and a color filter layer disposed between the side surfaces of the bank patterns and disposed on the light emitting elements. The light emitting elements and the bank patterns include a same material.