Black Sealant Curing via Magnetic Nanoparticle Heating
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Solution Overview
Problem
Existing display device sealants face challenges with thermal curing, such as high temperatures and long curing times, and UV curing systems are weakened by black pigments, necessitating a sealant that can efficiently cure without these limitations.
Innovation Solution
A black sealant composition incorporating magnetic nanoparticles with a core and shell, conductive black particles, and a resin, which generates heat through spinning and frictional heat when subjected to a magnetic field, allowing for rapid thermal curing without the need for high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thermal curing is performed at high temperatures (150-180°C) for sufficient curing ratio, then curing strength is improved, but curing time increases to about 1 hour and temperature exposure increases
Solution Approach 1:
The patent introduces magnetic nanoparticles that enable curing at lower temperatures (below 150°C) by generating heat through magnetic field interaction. This changes the thermal parameters of the curing process, allowing sufficient curing ratio to be achieved at reduced temperature and time compared to conventional thermal curing
Solution Approach 2:
The patent replaces conventional thermal curing with magnetic field-based curing. By applying an external magnetic field to the magnetic nanoparticles embedded in the sealant, heat is generated internally within the sealant material itself, eliminating the need for external high-temperature heating and enabling faster, lower-temperature curing
2Loss of time
If UV curing system is used to perform curing within several tens seconds, then curing time is reduced, but black pigment absorbs UV light and weakens the curing effectiveness
Solution Approach 1:
The patent substitutes UV optical curing with magnetic field-based thermal curing. Since magnetic fields are not absorbed by black pigments in the same way UV light is, the magnetic nanoparticles can generate heat effectively even in the presence of black dye, enabling reliable curing without the absorption issues that plague UV curing of black sealants
Solution Approach 2:
The magnetic nanoparticles act as an intermediary that converts magnetic field energy into thermal energy within the sealant. This indirect heating mechanism bypasses the problem of UV light absorption by black pigments, as the heat is generated internally by the magnetic particles rather than being delivered optically through the pigment-containing sealant
3Object-affected harmful factors
If black pigment or dye is used to prevent light leakage, then light leakage prevention is improved, but UV light source is absorbed and UV curing effectiveness is weakened
Solution Approach 1:
The patent replaces UV optical curing with magnetic field curing to resolve the conflict between black pigment functionality and UV curing effectiveness. Magnetic fields penetrate the black pigment-containing sealant without being absorbed, allowing the magnetic nanoparticles to generate heat and cure the sealant effectively while the black pigment continues to prevent light leakage
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 black sealant effectively prevents light leakage and reduces damage from prolonged heat exposure by rapidly curing the sealant using magnetic fields, transferring heat efficiently to ensure strong adhesion and quick curing times comparable to UV curing.
Implementation Method 1
generates heat through spinning and frictional heat when subjected to a magnetic field
Implementation Method 2
when subjected to a magnetic field
Implementation Method 3
transfers heat efficiently
Implementation Method 4
magnetic nanoparticles including a core and a shell surrounding the core
Data Source
AI summary
A black sealant composition includes magnetic nanoparticles including a core and a shell surrounding the core, conductive black particles having a black color, and a resin including the magnetic nanoparticles and the conductive black particles dispersed therein.