Stepped Panel Edge Sealing for Narrow-Bezel Waterproof Displays
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Solution Overview
Problem
Existing display devices face challenges in maintaining a stable display function while minimizing the bezel area to ensure a sufficient display area, particularly in environments subject to external changes, and existing waterproof structures in the bezel area are prone to moisture penetration due to irregular protrusions and gaps.
Innovation Solution
A display device design incorporating a waterproof structure with aligned and protruded edges of panel members, sealed by sealing members, to form a stepped shape that minimizes irregular gaps and ensures complete sealing, using a combination of optical adhesive film, polarizing film, display panel, and cover panel, with calculated protrusion distances to accommodate manufacturing deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waterproof structure is employed in the bezel area, then moisture penetration is prevented, but the bezel area increases reducing the display area
Solution Approach 1:
The waterproof structure is divided into multiple disconnected waterproof members (first waterproof member and second waterproof member) positioned at different edge areas. This segmentation allows the waterproof function to be distributed across multiple small components rather than requiring a continuous waterproof barrier across the entire bezel, thus maintaining waterproof performance while minimizing overall bezel area.
Solution Approach 2:
Multiple members (optical adhesive film, polarizing film, display panel, cover panel) are nested together with their edges aligned and protruding beyond the waterproof members. The sealing member then seals around this nested structure, creating an integrated waterproof assembly that fits within a minimized bezel area while maintaining effective waterproofing.
2Area of stationary object
If the bezel area is minimized to ensure sufficient display area, then display area is maximized, but waterproof structures become prone to moisture penetration due to irregular protrusions and gaps
Solution Approach 1:
The edges of multiple members are pre-aligned and positioned to protrude a calculated distance beyond the waterproof members before sealing. This preliminary alignment ensures that when the sealing member is applied, it can completely seal around all members without gaps or irregular protrusions, preventing moisture penetration even in the minimized bezel area.
Solution Approach 2:
The protrusion distance of member edges is precisely calculated and controlled to be a specific distance beyond the waterproof members. This parameter optimization ensures complete sealing while minimizing the required bezel area, resolving the contradiction between display area maximization and waterproof reliability.
3Adaptability or versatility
If multiple members are used in the panel assembly, then display function is enhanced, but irregular protrusions and gaps occur compromising waterproofing
Solution Approach 1:
The members are designed with asymmetric edge positioning where each member's edge protrudes a calculated distance beyond the waterproof members. This asymmetric but controlled arrangement allows multiple members to be integrated while eliminating irregular gaps, as each member's position is precisely determined to ensure complete sealing.
Solution Approach 2:
The sealing member acts as an intermediary that completely seals around all the protruding edges of multiple members. This intermediary sealing layer bridges the potential gaps between different members and the waterproof members, ensuring waterproof performance is maintained despite the complexity of having multiple functional members.
Data Source
AI summary
A display device includes a housing including first and second edge areas; a panel assembly between a window and the housing; a first waterproof member corresponding to the first edge area; a second waterproof member corresponding to the second edge area and disconnected from the first waterproof member; and a first sealing member in contact with the first and second waterproof members, the panel assembly, the window and the housing. The panel assembly includes a plurality of members each protruded further than an end of the first waterproof member to respectively define first edges. Each first edge is in contact with the first sealing member, and protruded distances of the first edges from the end of the first waterproof member increase as a cross-sectional distance from the plurality of members to the window decreases to form a stepped shape of the panel assembly at the first edges.