Bent Substrate Sealing for Narrow Border Displays
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Solution Overview
Problem
Conventional display devices face challenges in achieving a better anti-water/oxygen effect while maintaining a narrow border area, as existing sealing designs are inadequate for preventing environmental moisture and oxygen from reaching the display element, leading to potential damage and unsightly border enlargement.
Innovation Solution
The design incorporates a first and second substrate with bent portions forming an accommodating space, where a packaging material is strategically placed to elongate the path of water/oxygen permeation, delaying contact with the display element and reducing border width, while also optimizing the use of packaging material for enhanced anti-water/oxygen protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dam seal is disposed around the edges of the protection cover and substrate for sealing, then the anti-water/oxygen effect is improved, but the border area is enlarged and the display area is reduced
Solution Approach 1:
The patent introduces bent portions that extend in the thickness direction (Z-axis) of the display device, creating a three-dimensional sealing structure. This vertical dimension allows the sealing structure to prevent water and oxygen permeation without occupying additional horizontal space, thus maintaining the display area while improving the anti-water/oxygen effect.
Solution Approach 2:
The bent portions are disposed within the existing border area between the protection cover and substrate, nesting the sealing structure inside the available space rather than adding it externally. This allows the sealing function to be integrated into the existing structure without enlarging the overall border area.
2Reliability
If the border of the display device is enlarged to accommodate sealing structures, then the anti-water/oxygen effect is improved, but the display area is reduced and the appearance is unpleasing
Solution Approach 1:
By utilizing the thickness direction for the bent portions, the sealing structure achieves effective water and oxygen barrier properties without increasing the horizontal dimensions of the border. This maintains the sleek, narrow-border appearance that is aesthetically pleasing while still providing robust environmental protection.
3Reliability
If conventional sealing designs are used to prevent water/oxygen permeation, then the anti-water/oxygen effect is improved, but the packaging material usage is excessive
Solution Approach 1:
The sealing function is segmented into multiple bent portions positioned at different locations and orientations within the accommodating space. This segmentation allows the packaging material to be strategically placed only where needed for sealing, rather than using excessive material to fill the entire space, thus reducing material consumption while maintaining effective water and oxygen barrier properties.
Data Source
AI summary
A display device comprises a first substrate including a first top portion, a first sidewall portion and a first bent portion, a second substrate including a second top portion, a second sidewall portion and a second bent portion, a display element and a packaging material. The first bent portion is disposed between the first top portion and the first sidewall portion. The second substrate is separated from the first substrate by a predetermined distance to form an accommodating space. The second top portion is disposed corresponding to the first top portion. The second bent portion is disposed between the second top portion and the second sidewall portion. The display element is disposed in the accommodating space. The packaging material is disposed in the accommodating space and corresponding to the first sidewall portion and the second sidewall portion.