Display Panel Sealing Structure for Impact and Moisture Resistance
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Solution Overview
Problem
Current display devices face challenges in achieving high impact strength and effective moisture prevention, particularly in the bonding process between display substrates, where existing sealing members may not adequately address durability and moisture penetration issues.
Innovation Solution
A method of fabricating a display panel involving the formation of a frit sealing member with distinct crystallization temperatures for its inner and outer regions, combined with an organic sealing member, to enhance bonding strength and prevent moisture ingress, where the inner region of the frit sealing member is crystallized using a laser beam and the organic sealing member is cured to provide additional protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a sealing member is formed to enhance impact strength, then the bonding strength between substrates is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The sealing member is divided into multiple regions (first region and second region) with different crystallization temperatures. The first region has a lower crystallization temperature than the second region, allowing selective crystallization during the manufacturing process. This segmentation enables the sealing member to provide enhanced impact strength through controlled crystallization while maintaining a relatively simple overall structure.
Solution Approach 2:
Different regions of the sealing member are given different local properties through varying crystallization temperatures. The first region (with lower crystallization temperature) can be selectively crystallized to provide specific mechanical properties such as enhanced impact strength, while the second region remains at a different thermal state. This local quality differentiation allows the sealing member to optimize performance in specific areas without requiring complete structural complexity throughout.
2Reliability
If the frit sealing member is crystallized to prevent moisture penetration, then the moisture resistance is improved, but thermal damage to the organic sealing member may occur
Solution Approach 1:
The frit sealing member is segmented into regions with different crystallization temperatures. The first region has a lower crystallization temperature that allows it to be crystallized before the organic sealing member is applied or cured. The second region has a higher crystallization temperature and remains uncrytallized at this stage. This segmentation enables moisture resistance to be established in the first region without subjecting the organic sealing member to excessive thermal damage.
Solution Approach 2:
The first region of the frit sealing member is crystallized in advance before the organic sealing member is applied or fully cured. This preliminary crystallization action establishes the moisture-resistant barrier early in the manufacturing process, protecting the organic sealing member from subsequent thermal damage during later crystallization steps for the second region.
3Manufacturing precision
If a dual-region frit sealing member is used to control crystallization, then the manufacturing precision is improved, but the ease of manufacture decreases
Solution Approach 1:
The key parameter that is changed is the crystallization temperature of different regions of the frit sealing member. By formulating the frit material with different compositions in the first and second regions, each region exhibits different crystallization temperatures. This parameter change enables precise control over the crystallization process, allowing the first region to crystallize at a lower temperature while the second region requires higher temperature, thereby improving manufacturing precision without requiring excessively complex fabrication procedures.
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 significantly enhances the impact strength and moisture resistance of the display device by creating a robust sealing mechanism that prevents crack propagation and maintains the integrity of the display panel under external stress, while also controlling thermal effects to protect the organic sealing member.
Implementation Method 1
the crystalizing of the inner region may include irradiating the inner region with a laser beam
Implementation Method 2
crystalizing the inner region of the preliminary frit sealing member
Implementation Method 3
curing the organic sealing member
Data Source
AI summary
A display panel may include a first display substrate, a second display substrate disposed over the first display substrate, and a sealing member bonding the first display substrate and the second display substrate. The sealing member may include a frit sealing member including an outer region and an inner region, with the inner region disposed next to an inner side of the outer region and having a first crystallization temperature lower than a second crystallization temperature of the outer region, and an organic sealing member disposed next to an inner side of the frit sealing member.