Inorganic Polysilazane Barrier Layer for Display Panel Protection
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Solution Overview
Problem
There is a need for technologies that can protect the exposed layers of display panels around holes in display devices while ensuring the reliability and efficiency of the manufacturing process.
Innovation Solution
A display device is manufactured using a method that includes a barrier layer made of an inorganic polysilazane compound, which is directly disposed on an inorganic encapsulation film, replacing the traditional stack of organic and inorganic encapsulation films. This barrier layer is formed through a printing method and then cured with laser light, providing a sufficient thickness to protect the display panel components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional stack of organic and inorganic encapsulation films is used, then the display panel is protected from moisture and oxygen, but the manufacturing process becomes complex and time-consuming
Solution Approach 1:
The patent combines the protective functions of multiple encapsulation films (organic and inorganic) into a single barrier layer made of inorganic polysilazane compound. This single layer provides both moisture and oxygen barrier properties that previously required separate films, thereby simplifying the manufacturing process while maintaining protection reliability.
Solution Approach 2:
The barrier layer uses an inorganic polysilazane compound that exhibits both hydrophobicity (resistance to moisture) and oxidation resistance properties. This composite material approach allows a single layer to fulfill multiple protective functions that traditionally required separate organic and inorganic encapsulation films.
2Reliability
If multiple encapsulation films are stacked to protect exposed layers, then reliability is improved, but the manufacturing time and process steps increase
Solution Approach 1:
The patent merges multiple encapsulation steps into a single printing and curing process. The barrier layer is applied directly to the inorganic encapsulation film in one step, eliminating the need to separately apply and cure multiple organic and inorganic encapsulation films, thereby reducing manufacturing time while maintaining comprehensive protection.
Solution Approach 2:
The patent segments the encapsulation function into two distinct layers: a base inorganic encapsulation film providing structural support and initial protection, and a barrier layer providing enhanced moisture and oxygen barrier properties. This segmentation allows each layer to be optimized for its specific function while reducing the total number of layers compared to traditional multi-film stacks.
3Ease of manufacture
If a barrier layer with sufficient thickness is formed to replace encapsulation films, then manufacturing process is simplified, but the thickness control and uniformity become challenging
Solution Approach 1:
The patent replaces traditional mechanical deposition methods with a printing method for applying the barrier layer. This printing approach, followed by laser curing, provides better control over layer thickness and uniformity compared to conventional methods, while simplifying the overall manufacturing process. The printing method allows precise material placement and the laser curing ensures uniform polymerization throughout the layer.
Solution Approach 2:
The patent utilizes laser curing to change the physical and chemical parameters of the barrier layer material. By controlling the laser parameters (power, speed, wavelength), the process achieves precise control over the curing depth and extent, ensuring uniform polymerization and consistent layer properties throughout the barrier layer thickness.
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 use of a barrier layer containing inorganic polysilazane enhances the reliability of the display device by effectively protecting it from moisture, oxygen, and chemicals, while also simplifying the manufacturing process and improving the adhesion to the inorganic encapsulation film.
Implementation Method 1
The use of a barrier layer containing inorganic polysilazane enhances the reliability of the display device by effectively protecting it from moisture, oxygen, and chemicals
Implementation Method 2
This barrier layer is formed through a printing method and then cured with laser light, providing a sufficient thickness to protect the display panel components
Implementation Method 3
The use of a barrier layer containing inorganic polysilazane enhances the reliability of the display device by effectively protecting it from moisture, oxygen, and chemicals, while also simplifying the manufacturing process and improving the adhesion to the inorganic encapsulation film
Data Source
AI summary
A display device includes: a circuit layer including a transistor and a plurality of insulating layers, a display element layer disposed on the circuit layer and including a light emitting element electrically connected to the transistor, an inorganic encapsulation film disposed on the display element layer, and a barrier layer directly disposed on the inorganic encapsulation film and containing an inorganic polysilazane compound.