Quantum Dot Droplet Sequencing for Defect-Reduced Display Manufacturing
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Solution Overview
Problem
Conventional display apparatus manufacturing processes are prone to defects.
Innovation Solution
A method involving the discharge of droplets containing quantum dots and scatterers into specific openings of a substrate, with varying concentrations and distributions of scatterers and quantum dots to form resin layers, using multiple nozzles to reduce defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If scatterers and quantum dots are discharged into openings using conventional methods, then the manufacturing process can be completed, but defects occur due to variations in concentration distribution
Solution Approach 1:
The patent divides the discharge process into multiple stages: first discharging scatterers into all openings, then discharging quantum dots into specific openings. This segmentation prevents concentration variations by controlling the timing and location of material deposition, ensuring uniform distribution and reducing defects.
Solution Approach 2:
The patent performs preliminary discharge of scatterers into all openings before discharging quantum dots into specific openings. This preliminary action establishes a uniform base layer that prevents subsequent concentration variations and ensures consistent optical properties across the display apparatus.
2Quantity of substance
If multiple droplets are discharged into the same opening, then material coverage is improved, but concentration variations cause stains and image quality degradation
Solution Approach 1:
The patent discharges scatterers into all openings before discharging quantum dots into specific openings. This preliminary action ensures that scatterers are uniformly distributed across the entire surface, providing a consistent base that prevents concentration variations and stains when quantum dots are subsequently added to specific regions.
Solution Approach 2:
The patent segments the discharge process by type of material and by location. Scatterers are discharged first across all openings, then quantum dots are discharged only into openings that require color conversion. This segmentation maintains concentration uniformity while ensuring complete material coverage.
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
Reduces the likelihood of defects in the manufacturing process, enhancing the quality and efficiency of display apparatus production.
Implementation Method 1
the discharge unit may include a first nozzle and a second nozzle, the discharging of the first droplet into the first opening of the first area may include discharging the first droplet from the first nozzle of the discharge unit into the first opening of the first area of the substrate
Data Source
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AI summary
A method of manufacturing a display apparatus, includes: discharging a first droplet including quantum dots into a first opening of a substrate; discharging a second droplet including quantum dots into a second opening of the substrate; and after discharging the first droplet and the second droplet, discharging a third droplet including scatterers into the first opening, the second opening, and a third opening of the substrate.