Display Panel Encapsulation With Pre-Sealing Water Vapor Removal
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Solution Overview
Problem
Existing OLED display panels face challenges in effectively sealing against water vapor and oxygen, which affect the encapsulation process and device lifespan, especially in complex environments with airflow and water vapor conditions.
Innovation Solution
An encapsulation and water vapor removal device is introduced, featuring an air intake and discharge system with control mechanisms to remove water vapor between the substrate and cover plate, followed by sealing with a sealant to isolate the water vapor path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If encapsulation is performed in a non-vacuum environment, then the encapsulation process is easier to operate, but water vapor enters the encapsulation layer causing bubbles and poor encapsulation quality
Solution Approach 1:
The patent applies preliminary action by pre-removing water vapor from the encapsulation layer before the encapsulation material is applied. The water vapor removal device is positioned to extract moisture from the substrate surface and encapsulation layer prior to sealing, ensuring the layer is dry and ready for high-quality encapsulation without requiring vacuum conditions during the actual encapsulation process.
2Manufacturing precision
If encapsulation is performed in a vacuum environment, then encapsulation quality is improved, but the encapsulation process becomes difficult to control and bubbles form
Solution Approach 1:
The invention performs water vapor removal before encapsulation material application, eliminating the need for vacuum conditions during encapsulation. This preliminary drying step ensures high encapsulation quality while maintaining easy process control in normal atmospheric conditions.
3Device complexity
If water vapor is not removed from the encapsulation layer, then the encapsulation process is simpler, but the display panel lifespan is reduced due to water and oxygen sensitivity
Solution Approach 1:
The patent implements a preliminary water vapor removal step before encapsulation material application. This simple pre-treatment ensures the encapsulation layer is free of moisture, protecting the OLED from water and oxygen damage without significantly increasing process complexity.
4Manufacturing precision
If a water vapor removal device is added to the encapsulation system, then encapsulation quality is improved, but the device complexity increases
Solution Approach 1:
The water vapor removal device is designed as a separate, modular component that can be integrated into the existing encapsulation system. This segmentation allows the drying function to be added independently, improving encapsulation quality while minimizing the impact on overall system complexity through modular design.
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 device enhances the encapsulation effect by removing water vapor and sealing the display panel, thereby reducing its impact on the pixel module and improving the overall encapsulation quality.
Implementation Method 1
When the air intake and discharge device is in an intake state, the control mechanism controls the first power assembly to suck in air from between the substrate and the cover plate through the air inlet
Implementation Method 2
When the air intake and discharge device is in a discharge state, the control mechanism controls the second power assembly to discharge air with water vapor to the outside of the air intake and discharge device away from the display panel
Data Source
AI summary
An encapsulation and water vapor removal device, an encapsulating method of a display panel, and a display device are disclosed. The display panel includes a substrate, a pixel module, and a cover plate. The pixel module is arranged on the substrate. The cover plate is arranged on a side of the pixel module facing away from the substrate. An encapsulation and water vapor removal device is arranged on a side of the pixel module. The encapsulation and water vapor removal device is used to remove water vapor between the substrate and the cover plate. After the water vapor is discharged, a sealant is injected to seal the sides of the substrate and the cover plate to obtain an encapsulated display panel.