Nanoscale Electronic Ink for Fast Response and High Definition
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Solution Overview
Problem
Electronic paper displays suffer from slow response speed and poor image definition due to the large particle diameter of display particles in electronic ink, leading to directional movement of charged particles in an electrical field.
Innovation Solution
The development of electronic ink comprising an inorganic mixture of white pigments with a particle diameter of 20-50 nm, formed by mixing zinc oxide, zinc sulfide, lithopone with boron oxide, lithium oxide, and zirconium oxide, dispersed using a dispersant and surfactant, and encapsulated in a microcapsule prepolymer to enhance uniformity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If display particles with large particle diameter are used in electronic ink, then the stability of electronic ink is improved, but the response speed and image definition of display devices deteriorate
Solution Approach 1:
The patent changes the particle diameter parameter from traditional large size to 20-50 nm nanoscale size. This parameter change enables display particles to achieve both sufficient stability and fast response speed, as the nanoscale particles can move quickly under electric field while maintaining compositional stability through controlled synthesis
Solution Approach 2:
The patent uses composite materials by combining multiple inorganic white pigments (zinc oxide, zinc sulfide, lithopone) with metal oxides (boron oxide, lithium oxide, zirconium oxide) to create a composite nanoparticle system. This composite structure provides both stability and fast response characteristics
2Stability of the object's composition
If display particles with large particle diameter are used in electronic ink, then the stability of electronic ink is improved, but the image definition of display devices deteriorates
Solution Approach 1:
The patent changes the particle diameter parameter to 20-50 nm, which is small enough to achieve high image definition and sharp display quality, while still maintaining stability through controlled nanoscale synthesis and composition
Solution Approach 2:
The patent applies local quality by creating uniform nanoscale particles with controlled composition and size distribution. The homogeneous nanoscale structure throughout the electronic ink ensures consistent performance and high image definition across the entire display device
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 results in improved response speed and image definition of display devices, with the small particle diameter allowing swift directional movement under Coulomb force, and high anion concentrations contributing to better air quality during manufacturing.
Implementation Method 1
the charged display particles dispersed in the electrophoresis base liquid swim directionally at a low velocity under the action of Coulomb force in an electrical field
Implementation Method 2
Electronic ink, as an important material for electronic paper, generally comprises display particles, an electrophoresis base liquid, and capsule materials
Data Source
AI summary
Disclosed are an electronic ink, an electronic paper and a method for preparing an electronic ink, wherein said electronic ink comprises display particles, an electrophoresis base liquid and a microcapsule prepolymer, wherein said display particles are an inorganic mixture of white pigments with a particle diameter of about 20-50 nm; said inorganic mixture of white pigments is formed by mixing at least one or more of zinc oxide, zinc sulfide and lithopone with boron oxide, lithium oxide and zirconium oxide. Said electronic ink is capable of improving image definition of display devices.