OLED Encapsulant Composite Structure for Impact Resistance
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Solution Overview
Problem
Organic light-emitting display devices (OLEDs) are vulnerable to external impact and vibrations due to the low mechanical strength of glass frit encapsulants, which can lead to penetration of oxygen and moisture, causing display quality degradation and the formation of dark spots.
Innovation Solution
Incorporating a metallic material as a second encapsulant within the glass frit encapsulant, which spreads randomly and increases the adhesion area, enhancing the mechanical strength and impact resistance of the encapsulant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass frit is used as encapsulant material, then oxygen and moisture penetration is prevented, but mechanical strength and impact resistance are insufficient
Solution Approach 1:
The patent uses a composite encapsulant structure consisting of glass frit particles embedded in a resin matrix. The glass frit provides hermetic sealing against oxygen and moisture, while the resin provides mechanical strength and impact resistance. This composite approach resolves the contradiction by combining materials with complementary properties to achieve both protection and structural integrity.
Solution Approach 2:
The resin acts as an intermediary material that bonds the glass frit particles together and to the substrate. It provides the mechanical framework that absorbs impact forces, preventing direct transmission to the glass frit, while the glass frit maintains the hermetic barrier function. This mediator approach allows each material to perform its optimal function without compromising the other.
2Reliability
If glass frit encapsulant is used, then encapsulation is achieved, but vulnerability to external impact and vibrations increases
Solution Approach 1:
By creating a composite of glass frit and resin, the encapsulant gains vibration and impact resistance from the resin matrix while maintaining encapsulation effectiveness through the glass frit network. The resin dampens external vibrations, preventing them from compromising the hermetic seal.
Solution Approach 2:
The resin matrix serves as a cushioning layer that absorbs and dissipates impact energy before it can reach the glass frit encapsulant. This beforehand cushioning protects the hermetic barrier from damage due to external impacts and vibrations, maintaining encapsulation integrity.
Data Source
AI summary
An organic light-emitting display device and a method of manufacturing the same are disclosed. The organic light-emitting display device (OLED) may include a first substrate with an element region and an encapsulation region surrounding the element region, a second substrate facing the first substrate, an organic light-emitting element interposed between the first substrate and the second substrate and formed in the element region, and an encapsulant interposed between the first substrate and the second substrate and formed in the encapsulation region. The encapsulant may include both a first encapsulant and a second encapsulant. The second encapsulant formed within the first encapsulant and is adjacent to at least one of the first substrate and the second substrate.