Polarizable Particle Sealant for OLED Moisture Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light emitting display devices face challenges in preventing the penetration of external moisture and impurities, which can degrade their performance and reduce their lifespan.
Innovation Solution
Incorporating particles with polarization characteristics into a sealant adhesive unit between substrates, which are arranged to form blocking units, either in a column or chained shape, to block external impurities and moisture, using materials like polyaniline, silica gel, or zeolite, and applying an electric or magnetic field to align these particles for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealant is used to adhere substrates, then the device can be manufactured with simple structure, but external moisture and impurities can penetrate through the sealant, degrading device performance
Solution Approach 1:
The patent applies composite materials by combining particles with polarization characteristics (such as barium titanate, strontium titanate, or lead zirconate titanate) with a sealant material to form an adhesive unit. This composite structure provides both the sealing function of the sealant and the impurity-blocking function of the polarizable particles, resolving the contradiction between simple structure and effective protection against moisture and impurities.
Solution Approach 2:
The patent changes the physical parameters of the adhesive unit by incorporating particles with specific polarization characteristics and controlling their concentration (e.g., 1-10 wt%). This parameter modification enhances the sealant's ability to block impurities while maintaining adhesion functionality, thereby improving reliability without excessive structural complexity.
2Reliability
If particles are randomly dispersed in the sealant, then the adhesive unit is easy to manufacture, but the particles do not effectively block penetration of external impurities
Solution Approach 1:
The patent replaces mechanical arrangement methods with an electric field-based system to align particles. By applying an electric field during the curing process, the polarizable particles automatically orient themselves in a directional arrangement that maximizes impurity blocking capability. This substitution eliminates complex mechanical alignment mechanisms while achieving effective particle distribution.
Solution Approach 2:
The patent utilizes the polarization parameter of particles to enable field-induced alignment. By selecting particles with specific polarization characteristics and applying an electric field, the particles transition from random dispersion to ordered arrangement, enhancing blocking capability without requiring complex manufacturing processes.
3Reliability
If the sealant is applied without particles, then the manufacturing process is simple, but the sealant alone cannot prevent penetration of external moisture and impurities
Solution Approach 1:
The patent creates a composite adhesive unit by integrating polarizable particles into the sealant matrix. This composite structure combines the adhesive and sealing properties of the sealant with the impurity-blocking properties of the particles, achieving enhanced protection without significantly increasing device complexity.
Solution Approach 2:
The adhesive unit is designed to perform multiple functions simultaneously: the sealant provides adhesion and basic sealing, while the incorporated particles provide enhanced blocking against moisture and impurities. This multi-functionality approach allows a single component to address multiple requirements, reducing the need for additional separate structures.
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 effectively prevents the penetration of external moisture and impurities, thereby increasing the lifetime and reliability of the organic light emitting display devices.
Implementation Method 1
particles that are arranged in the sealant so as to block penetration of external impurities... particles may include a material having polarization characteristics in the sealant due to an electric field or a magnetic field
Data Source
AI summary
There is provided an organic light emitting display device including a first substrate; an organic light emitting unit formed on the first substrate; a second substrate disposed on the organic light emitting unit; and an adhesive unit for adhering the first substrate and the second substrate to each other, wherein the adhesive unit includes a sealant, and particles that are arranged in the sealant so as to block penetration of external impurities. There is further provided a method of manufacturing the organic light emitting display device.