Sealing Member Overlap for Flat Panel Display Moisture Protection
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Solution Overview
Problem
Conventional flat panel display apparatuses suffer from reduced lifespan and light emission efficiency due to moisture and oxygen permeation, which deteriorates electrode materials and organic light emitting diodes, leading to uneven visibility and color purity issues.
Innovation Solution
A sealing method using a frit-based sealing member that overlaps with the outermost pixels and driving units, ensuring equal visibility with inner pixels and enhancing mechanical rigidity by surrounding the display region, thereby preventing moisture and oxygen ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing member is positioned only at the edges of the display region, then the manufacturing process is simple, but the sealing effect is insufficient and moisture can permeate into the display region
Solution Approach 1:
The sealing member is extended from the traditional edge-only positioning into the display region, creating a multi-dimensional sealing configuration. The sealing member overlaps with outermost pixels and extends toward the center, transforming the sealing approach from a one-dimensional edge seal to a two-dimensional seal that covers both edges and internal regions, thereby enhancing the sealing effect without excessive complexity
Solution Approach 2:
The sealing structure is divided into multiple segments: a first sealing member positioned at the edges and a second sealing member extending into the display region. This segmentation allows each part to perform specific sealing functions, with the first sealing member providing edge sealing and the second sealing member providing internal region sealing, thereby improving overall sealing reliability
2Reliability
If the sealing member overlaps with outermost pixels, then the sealing effect is enhanced, but the visibility of outermost pixels may be degraded
Solution Approach 1:
The sealing member is designed with varying transparency characteristics at different locations. The portion overlapping with outermost pixels maintains higher transparency to preserve visibility, while the portion at the edges can be less transparent. This local quality differentiation allows the sealing member to simultaneously provide effective sealing and maintain pixel visibility where required
Solution Approach 2:
The sealing member overlaps with only the outermost pixels rather than extending over the entire display region. This partial action approach provides sufficient sealing effect at the critical edge regions where moisture permeation is most likely to occur, while minimizing the impact on the visibility and display quality of the pixel regions
3Reliability
If the sealing member surrounds the entire display region including outermost pixels, then moisture permeation is prevented, but the mechanical rigidity may be reduced due to coverage of light emitting layers
Solution Approach 1:
The sealing member is positioned to overlap with only the outermost pixels and extend toward the center, rather than completely surrounding the entire display region. This partial coverage provides effective protection at the critical edge regions where moisture permeation is most likely to occur, while minimizing the coverage area over light emitting layers to preserve mechanical rigidity and light emission efficiency
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 effectively increases the sealing effect, enhancing the mechanical rigidity and visibility of flat panel displays while maintaining the integrity of the organic light emitting diodes, thus extending the lifespan and improving light emission efficiency.
Implementation Method 1
a sealing member between the first substrate and the second substrate and for bonding the first substrate and the second substrate to each other
Implementation Method 2
A sealing method using a frit-based sealing member that overlaps with the outermost pixels and driving units, ensuring equal visibility with inner pixels and enhancing mechanical rigidity by surrounding the display region, thereby preventing moisture and oxygen ingress
Data Source
AI summary
A flat panel display apparatus includes: a first substrate, a second substrate opposite the first substrate and including a display region in which a plurality of pixels are formed, and a sealing member between the first substrate and the second substrate; the sealing member bonds the first substrate and the second substrate to each other. The sealing member overlaps at least a part of outermost pixels of the display region.