Display Sealing Structure With Filling Element for Hermetic Stability
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Solution Overview
Problem
Existing display devices face challenges in maintaining reliability due to issues with sealing elements that can lead to adhesion strength reduction, decoupling of components, and exposure to external moisture and contaminants, which affect mechanical strength and operational stability.
Innovation Solution
The display device incorporates a filling element that is wider than the sealing element, covering it and maintaining a gap between the window and substrate, thereby enhancing mechanical strength and preventing decoupling, while also being in contact with the sealing element to prevent adhesion weakness and external substance ingress, ensuring a hermetically sealed internal space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing element is used to connect the substrate and encapsulation element, then hermetic sealing is achieved, but adhesion strength reduction and decoupling of components occur
Solution Approach 1:
A filling element is introduced as an intermediary component between the sealing element and the window element. This filling element serves as a mediator that prevents direct harmful interaction (adhesion reduction) while allowing the sealing element to maintain its hermetic function. The filling element absorbs stress and prevents decoupling without compromising the seal integrity.
Solution Approach 2:
The filling element is positioned in advance between the sealing element and window element to provide cushioning protection. It preemptively absorbs mechanical stress and prevents decoupling before it can occur, thereby maintaining adhesion strength while preserving the hermetic sealing function of the sealing element.
2Reliability
If the sealing element is used to define the hermetically-sealed internal space, then moisture protection is achieved, but mechanical strength and stability are reduced
Solution Approach 1:
The filling element acts as an intermediary support structure that enhances mechanical strength without interfering with the sealing element's moisture protection function. It provides structural reinforcement to the internal space definition while allowing the sealing element to maintain its barrier function against moisture and contaminants.
Solution Approach 2:
The combination of the sealing element and filling element creates a composite structure that integrates both hermetic sealing and mechanical strength functions. The filling element material is selected to provide structural support, while the sealing element maintains the moisture barrier, together forming a composite system with enhanced overall performance.
3Strength
If the filling element is made wider to cover the sealing element, then mechanical strength and stability are improved, but device complexity increases
Solution Approach 1:
The filling element is designed to perform multiple functions simultaneously: it provides mechanical support, prevents decoupling, cushions stress, and maintains the hermetic seal integrity. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving enhanced mechanical strength and stability.
Data Source
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AI summary
A display device including: a substrate element including a base layer, a circuit layer, and a device layer, the base layer forming a plane defined by a first direction and a second direction perpendicular to each other; an encapsulation element provided on the substrate element to seal the device layer; a sealing element provided along edges of the encapsulation element to connect the encapsulation and substrate elements to each other; an optical element provided on the encapsulation element; a window element provided on the substrate element; an adhesive element provided between the optical and window elements to connect the optical element to the window element; and a filling element provided between the window element and the substrate element, wherein the filling element is spaced apart from the optical element and the adhesive element, and is overlapped with the sealing element when viewed in a direction normal to the plane.