OLED Sealing Frame with Integrated Drying and Supporting Layers
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Solution Overview
Problem
Existing package structures for organic light-emitting diode (OLED) devices are complex and inefficient due to the need for multiple layers to isolate oxygen and moisture, which complicates processing and reduces production efficiency.
Innovation Solution
A package structure featuring a sealing frame with a drying layer and a supporting layer, where the supporting layer includes sub-layers that form dense connections with the substrates and an outside layer capable of sintering, providing dual functions of moisture absorption and oxygen blocking, and optionally using color-changing silica gel for moisture detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple layers are used to isolate oxygen and moisture in OLED devices, then protection against oxygen and moisture is improved, but device complexity and processing difficulty increase
Solution Approach 1:
The patent combines the drying layer and supporting layer into a single integrated sealing frame structure. The drying layer (containing silica gel) and supporting layer (made of sintered glass) are formed as one piece that simultaneously provides moisture absorption, oxygen blocking, and mechanical support functions, eliminating the need for separate layers and reducing structural complexity
Solution Approach 2:
The sealing frame is designed to perform multiple functions simultaneously: the drying layer absorbs moisture, the sintered glass material blocks oxygen permeation, and the integrated structure provides mechanical support and spacing between substrates. This multi-functional design reduces the number of components needed while maintaining comprehensive protection
2Reliability
If multiple layers are used to isolate oxygen and moisture, then protection against oxygen and moisture is improved, but production efficiency decreases
Solution Approach 1:
By integrating the drying layer and supporting layer into a single sealing frame component, the patent reduces the number of assembly steps and material deposition processes required. This consolidation simplifies manufacturing and improves production efficiency while maintaining effective oxygen and moisture protection
Solution Approach 2:
The sintered glass supporting layer is pre-formed with the drying layer integrated during the sealing frame manufacturing process, rather than adding layers sequentially during device assembly. This preliminary integration of protective layers streamlines production and enhances manufacturing efficiency
3Reliability
If a drying layer is added to absorb moisture, then moisture protection is improved, but device complexity increases
Solution Approach 1:
The drying layer is merged with the supporting layer to form an integrated sealing frame. This combination means the moisture-absorbing function is added without requiring a separate, standalone drying layer component, thus improving moisture protection while minimizing increases in structural complexity
Solution Approach 2:
The sealing frame is designed as a multi-functional component where the drying layer provides moisture absorption while the integrated structure simultaneously provides mechanical support and spacing. This universal design approach adds moisture protection functionality without proportionally increasing overall device complexity
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
This simplified structure effectively prevents external oxygen and moisture from entering the OLED device while maintaining high production efficiency and mechanical strength, with the ability to detect moisture through color changes in the sealing frame material.
Implementation Method 1
a drying layer and a supporting layer, located between the first substrate and the second substrate... the drying layer includes silica gel
Implementation Method 2
the supporting layer includes sintered glass... capable of sintering, providing dual functions of moisture absorption and oxygen blocking
Implementation Method 3
optionally using color-changing silica gel for moisture detection... a material of the drying layer is capable of changing color after absorbing water
Data Source
AI summary
A package structure of a display panel and a display device are provided. The package structure of the display panel includes: a first substrate and a second substrate opposite to each other; and a display component, a drying layer, and a supporting layer, located between the first substrate and the second substrate; wherein, the supporting layer is configured to support the first substrate and the second substrate to maintain an interval between the first substrate and the second substrate, the drying layer and the supporting layer are directly connected with each other, the supporting layer includes a first sub-supporting layer, and the first sub-supporting layer is located on a side of the drying layer away from the display component.