Color Conversion Layer via Block Copolymer Self-Assembly
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Solution Overview
Problem
Current methods for manufacturing color conversion layers in OLED displays using quantum dots or perovskite materials are complex and costly, lacking precision in creating a regular arrangement at the pixel level for high-resolution displays.
Innovation Solution
A method involving the formation of a self-assembled block copolymer film on a substrate, followed by creating grooves using a protective layer and depositing color conversion ink into these grooves, allowing for precise placement and high-resolution microstructure at the pixel level, utilizing block copolymers and specific solvents for self-assembly and patterning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If inkjet printing technology is used to deposit quantum dot or perovskite ink at pixel level, then manufacturing precision and resolution are improved, but process complexity and cost increase due to the need for pre-formed patterned structures
Solution Approach 1:
The block copolymer film is pre-formed on the substrate before inkjet printing, creating a self-assembled patterned structure with main parts and spacing parts. This preliminary structuring eliminates the need for complex pre-formed patterns while enabling precise pixel-level ink deposition in subsequent steps
Solution Approach 2:
The block copolymer film acts as an intermediary layer between the substrate and the color conversion ink. It provides a self-assembled template structure that guides ink placement, simplifying the overall manufacturing process while maintaining high precision
2Manufacturing precision
If pre-formed patterned structures are created on substrate before ink deposition, then manufacturing precision is improved, but the number of process steps and cost increase
Solution Approach 1:
The block copolymer film performs self-assembly to form the patterned structure automatically without requiring external patterning equipment or complex manufacturing steps. The self-service characteristic of self-assembly simplifies manufacturing while achieving high precision patterns
Solution Approach 2:
The block copolymer undergoes phase separation and self-assembly driven by changes in temperature, solvent evaporation, or other parameters, transforming from a homogeneous film to a patterned structure with distinct main parts and spacing parts, achieving precision patterning through parameter control
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 enables a simple, cost-effective, and high-precision method for producing color conversion layers with microstructures at the pixel level, suitable for blue backlight display technologies, enhancing printing precision and applicability.
Implementation Method 1
subjecting the block copolymer film to self-assembly to obtain a self-assembled block copolymer film, wherein the self-assembled block copolymer film comprises a plurality of main parts arranged in order and a plurality of spacing parts disposed between the plurality of main parts
Implementation Method 2
the protective layer has affinity with the main body parts and has no affinity with the spacing parts
Implementation Method 3
a developer is used to remove the spacing parts which are not covered by the protective layer
Implementation Method 4
dropping a color conversion layer ink into the grooves
Implementation Method 5
followed by drying the color conversion layer
Data Source
AI summary
A color conversion layer and a manufacturing method of the same are provided. The manufacturing method of the color conversion layer includes steps of: subjecting a block copolymer thin film to self-assembly to obtain a self-assembled block copolymer thin film, including a plurality of main parts arranged in order, and a plurality of spacing parts disposed between the plurality of main parts; forming a protective layer covering the main parts; removing the spacing parts to form a plurality of grooves arranged in order; and dropping a color conversion layer ink into the grooves, followed by drying the color conversion layer ink to obtain the color conversion layer.