OLED Display Panel UV-Cured Encapsulant Sealability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light-emitting diode (OLED) display panels face degradation due to moisture and oxygen ingress, leading to reduced service life and potential black spots, necessitating improved sealability.
Innovation Solution
Incorporating a UV-cured encapsulant composition containing 1% to 90% inorganic nano particles, which enhances sealant strength and moisture/oxygen absorption, along with a desiccant composition to absorb vapors and oxygen, and an encapsulation isolation frame to prevent pollution of the organic light-emitting element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional encapsulant is used to seal the gap between substrates, then the sealing function is provided, but the sealability and service life are insufficient due to moisture and oxygen ingress
Solution Approach 1:
The encapsulant composition is formulated as a composite material containing inorganic nanoparticles (such as silica, alumina, or titania) dispersed in an organic matrix. These inorganic particles provide enhanced barrier properties against moisture and oxygen penetration, while the organic matrix provides adhesion and flexibility. This composite structure resolves the contradiction by simultaneously improving sealability and extending service life through the synergistic effects of the constituent materials.
Solution Approach 2:
The encapsulant utilizes a porous structure with controlled pore sizes that can absorb and trap moisture and oxygen molecules. The porous network provides increased surface area for barrier action while maintaining adequate adhesion and flexibility. This approach improves sealability and extends service life by creating a multi-functional barrier that physically blocks and chemically absorbs harmful substances.
2Reliability
If the encapsulant material is enhanced for better sealing, then sealability improves, but the complexity of material composition increases
Solution Approach 1:
The invention optimizes specific parameters of the encapsulant composition, such as the particle size distribution (0.1-10 micrometers), concentration of inorganic particles (10-90 wt%), and crosslinking density, to achieve the desired balance between sealability and material complexity. By controlling these parameters within specific ranges, the patent achieves improved sealing performance without requiring overly complex material systems.
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 improves the sealability and extends the service life of OLED display panels by enhancing the sealant strength and absorption capabilities, while preventing contamination of the organic light-emitting element.
Implementation Method 1
a UV-cured encapsulant composition located at the surrounding region of the display substrate so as to seal a gap between the display substrate and the package substrate
Implementation Method 2
the UV-cured encapsulant composition for sealing the gap between the display substrate and the package substrate contains the inorganic nano particles, which can not only improve the strength of sealant but also can absorb water and oxygen
Data Source
AI summary
The present disclosure provides an OLED display panel including a display substrate having a displaying region and a surrounding region, a package substrate covering the display substrate, and a UV-cured encapsulant composition located at the surrounding region of the display substrate so as to seal a gap between the display substrate and the package substrate. An organic light-emitting element is formed at the displaying region of the display substrate. The UV-cured encapsulant composition contains in weight percentage 1% to 90% of inorganic nano particles.