Wave-Shaped Buffering Portions for Resin Control in Display Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices, particularly those using organic EL elements, are vulnerable to moisture, leading to deterioration and lighting failures due to the high wetting and spreading ability of sealing resins, which can cause the resin to climb over blocking structures, compromising display quality.
Innovation Solution
The implementation of buffering structures with a wave shape, arranged at predetermined intervals and protruding towards the sealing film, to decrease the wetting and spreading speed of the resin, preventing it from climbing over the blocking portion and ensuring accurate film formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a blocking structure is formed to prevent resin spreading, then film formation accuracy is improved, but the resin can still climb over the blocking structure due to high wetting and spreading ability
Solution Approach 1:
The blocking structure is divided into multiple segments: a first blocking portion and a second blocking portion positioned at different heights. This segmentation prevents the resin from climbing over by creating multiple barriers that the resin must overcome, addressing both film formation accuracy and sealing quality.
Solution Approach 2:
The blocking structure extends in the vertical dimension with portions at different heights relative to the substrate. This dimensional approach creates a multi-level barrier system that effectively stops resin spreading while maintaining precise film formation within the display region.
2Reliability
If a multi-layered sealing film is formed to seal the display element, then protection against moisture is improved, but the resin wetting and spreading causes deterioration in display quality
Solution Approach 1:
The sealing film structure varies locally with different blocking portions positioned at different heights in different regions. This local variation allows the resin to be contained effectively while maintaining high display quality in the display region by preventing resin intrusion through strategically placed blocking structures.
Solution Approach 2:
The blocking portions are formed in advance before resin application, creating pre-positioned barriers that guide and limit resin spreading. This preliminary structuring ensures that when the sealing resin is applied, it remains confined to appropriate regions and does not compromise display quality.
3Area of stationary object
If the sealing resin is applied with high wetting and spreading ability, then sealing coverage is improved, but the resin climbs over the blocking structure causing film formation inaccuracy
Solution Approach 1:
The multi-level blocking portions create preliminary resistance against resin climbing before the resin can spread uncontrollably. The first and second blocking portions at different heights work together to counteract the resin's wetting and spreading ability, maintaining both coverage and position accuracy.
Solution Approach 2:
The sealing structure combines multiple materials with different properties: the sealing resin with high wetting ability for coverage, and the blocking portions (which may be formed from different resin layers or materials) that provide mechanical barriers. This composite approach balances sealing coverage with film formation precision.
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 solution effectively prevents the resin from climbing over the blocking structure, enhancing the sealing process and maintaining display quality by controlling the wetting and spreading speed, thus protecting the organic EL elements from moisture-related deterioration.
Implementation Method 1
the applied resin has a high wetting and spreading ability, and the film forming position accuracy is not so high. Thus, there is a fear in that the resin may climb over the blocking structure.
Data Source
AI summary
A display device, including a display region formed of a plurality of pixels and a frame region formed on an outer side of the display region, includes a sealing film configured to cover the display region, a blocking portion formed in the frame region surrounding the display region, and buffering portions formed at least at two positions so as to be separated from each other on at least one straight line path extending from the display region to reach the blocking portion.In one embodiment of the present invention, the buffering portions have a wave shape in plan view.