Quantum Dot Ink Polysiloxane Microspheres Printing Smoothness
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Solution Overview
Problem
The addition of light-diffusing particles to quantum dot ink results in poor printing and stability issues with quantum dot filter films, affecting their optical performance.
Innovation Solution
A quantum dot ink comprising quantum dots, siloxane, and an acrylate compound, where the siloxane generates polysiloxane microspheres upon curing, enhancing light absorption and diffusion, thereby improving the light-emitting brightness and stability of the color filter film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light-diffusing particles are added to quantum dot ink to improve optical performance, then light diffusion effect is enhanced, but printing smoothness deteriorates and film stability is affected
Solution Approach 1:
The patent removes traditional light-diffusing particles from the quantum dot ink formulation. Instead, it uses the quantum dots themselves as the light-diffusing medium, eliminating the need for separate light-diffusing additives that cause printing problems.
Solution Approach 2:
The quantum dots serve multiple functions simultaneously: they act as both the light-emitting active material and the light-diffusing medium. This multi-functionality eliminates the need for separate light-diffusing particles while achieving both light emission and light diffusion effects.
2Illumination intensity
If light-diffusing particles are added to quantum dot ink to improve optical performance, then light diffusion effect is enhanced, but film stability deteriorates
Solution Approach 1:
The patent eliminates separate light-diffusing particles from the ink composition, using only quantum dots and resin. This simplification prevents the settling issue that occurs with traditional light-diffusing particles, thereby improving film stability.
Solution Approach 2:
The patent changes the particle size parameter of the light-diffusing medium by using quantum dots (1-20 nm) instead of traditional larger light-diffusing particles. This size parameter change prevents settling while maintaining light diffusion effectiveness.
3Manufacturing precision
If traditional quantum dot ink without light-diffusing particles is used, then printing smoothness is maintained, but light utilization is insufficient
Solution Approach 1:
The patent optimizes the quantum dot size parameter to 1-20 nm, which is smaller than traditional quantum dots. This parameter change enhances light diffusion capability while maintaining printing smoothness, thereby improving light utilization without sacrificing print quality.
Solution Approach 2:
The patent creates a composite system where quantum dots of specific size (1-20 nm) are combined with resin in a controlled ratio (quantum dots: 1-50 wt%, resin: 50-99 wt%). This composite formulation achieves both good printing performance and effective light diffusion.
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
The solution improves the printing smoothness and optical performance of the quantum dot filter film, increasing light utilization and brightness, and enhancing the adhesion and solvent resistance of the cured film.
Implementation Method 1
the siloxane is used for generating polysiloxane microspheres... the polysiloxane microspheres may reflect light that is not absorbed in the quantum dots
Implementation Method 2
the siloxane is used for generating polysiloxane microspheres... enhancing light absorption and diffusion
Implementation Method 3
Due to a quantum size effect and a dielectric confinement effect, the quantum dots have unique photoluminescence (PL) and electroluminescence (EL) properties
Implementation Method 4
the quantum dots have unique photoluminescence (PL) and electroluminescence (EL) properties... high color purity, and light-emitting color being able to be adjusted by controlling the sizes of quantum dots
Implementation Method 5
the polysiloxane microspheres may reflect light that is not absorbed in the quantum dots, so as to increase the amount of light absorbed by the quantum dots
Implementation Method 6
the siloxane is used for generating polysiloxane microspheres... after the quantum dot ink is printed, the siloxane is subjected to a reaction, so as to form the polysiloxane microspheres
Data Source
AI summary
The present disclosure provides a quantum dot ink, a color filter film, a display device and a color filter film preparation method, the quantum dot ink comprises quantum dots, siloxane and an acrylate compound, the quantum dot ink contains 1-50 wt % of the quantum dots, 5-50 wt % of the siloxane, and 10-90 wt % of the acrylate compound, wherein the siloxane is used to generate polysiloxane microspheres. When the siloxane is subjected to a reaction, so as to form the polysiloxane microspheres, which may reflect light that is not absorbed in the quantum dots such that the reflected light is re-absorbed in the quantum dots, so as to increase the amount of light absorbed by the quantum dots, thereby improving the light-emitting brightness of a color film prepared and formed in the quantum dot ink, effectively enhancing low utilization of excitation light, and improving a display effect of a display device.