Quantum Dot Color Conversion Layering for Defect-Reduced Displays
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Solution Overview
Problem
Conventional display apparatuses are prone to defects during the manufacturing process, particularly due to the complexity of integrating color conversion units.
Innovation Solution
A method of manufacturing a display apparatus involves precise droplet discharge and layering of quantum dots and scatterers within substrate openings, with varying densities and distributions to optimize the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quantum dots and scatterers are integrated into color conversion units, then light conversion capability is improved, but manufacturing defect rate increases
Solution Approach 1:
The manufacturing process is divided into separate sequential steps: first discharging quantum dots into substrate openings, then discharging scatterers into the same openings. This segmentation allows each material to be deposited independently with optimized parameters, preventing mixing issues and positioning errors that cause defects while maintaining the light conversion functionality of the color conversion units
Solution Approach 2:
Quantum dots are discharged and positioned in the substrate openings before scatterers are added. This preliminary action ensures that the quantum dots are correctly positioned for light absorption and emission, and subsequent scatterer discharge does not disrupt this positioning, thereby maintaining manufacturing precision while achieving both functional requirements
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 reduces the likelihood of defects and enhances the efficiency and quality of the display apparatus by ensuring uniform and effective light conversion.
Implementation Method 1
light of a first color generated by a light emitting unit of some pixels is converted into light of a second color while passing through a corresponding color conversion unit
Implementation Method 2
discharging a third droplet including scatterers into the first opening, the second opening, and a third opening of the substrate
Data Source
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.