Display Sealing Structure with Peripheral Projection
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Solution Overview
Problem
Existing display technologies with organic electroluminescent elements are vulnerable to water and oxygen permeation, leading to defects and reduced luminance due to inadequate sealing techniques, where adhesive or sealing layers exposed at perimeters allow gas entry.
Innovation Solution
A display structure featuring a first substrate with elements, a second substrate with a peripheral projection surrounding the first sealing layer, and a second sealing layer that minimizes exposure by filling the gap between the substrates through capillary action, ensuring the second sealing layer does not protrude and thus reduces gas permeation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing layer is arranged to cover the entire surface including the display region, then the sealing coverage is improved, but the exposed perimeter area increases allowing gas permeation
Solution Approach 1:
The sealing structure is divided into two distinct layers: a first sealing layer that covers the display region and elements, and a second sealing layer that surrounds the first sealing layer and is arranged in a non-display region. This segmentation allows each layer to perform its specific sealing function while minimizing exposed perimeter areas, thereby preventing gas permeation effectively.
2Reliability
If the adhesive layer reaches the display region, then the sealing coverage is improved, but the exposed perimeter allows gas entry into the display region
Solution Approach 1:
The sealing structure utilizes the vertical dimension by arranging the first and second sealing layers at different heights and positions. The first sealing layer is arranged in the display region covering elements, while the second sealing layer surrounds it in a non-display region. This dimensional arrangement ensures comprehensive sealing while minimizing exposed perimeters that would allow gas entry.
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 configuration effectively prevents external gas permeation, enhancing the reliability of the display by minimizing the area of the second sealing layer exposed to the outside and reducing the risk of element deterioration from water vapor and oxygen.
Implementation Method 1
the second sealing layer is arranged between the first substrate and the second substrate so as to extend from the periphery of the first sealing layer to the peripheral projection
Data Source
AI summary
A display includes a first substrate including elements arranged on a main surface of the first substrate, a second substrate arranged so as to face the main surface of the first substrate on which the elements are arranged, a first sealing layer arranged between the first substrate and the second substrate, and a second sealing layer arranged between the first substrate and the second substrate so as to surround the first sealing layer. The second substrate has a peripheral projection, the entirety of which projects toward the side on which the elements are arranged, and the peripheral projection surrounds the first sealing layer. The second sealing layer is arranged between the first substrate and the second substrate so as to extend from the periphery of the first sealing layer to the peripheral projection.