Display Sealing Layout for Larger Waterproof Screen Area
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Solution Overview
Problem
The sealing structure in electronic devices makes it difficult to extend the size of the display due to the area occupied by the sealing member, which is a challenge in providing a larger screen size while maintaining waterproof functionality.
Innovation Solution
The electronic device incorporates a second flexible printed circuit board that overlaps the display, with a sealing structure that includes a first and second sealing member, and a third sealing member connecting them, allowing for a support structure with openings that accommodate the sealing members, enabling the display to be extended in size while maintaining waterproof integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing structure with sealing members is used to ensure waterproof function, then waterproof reliability is improved, but the display area is reduced due to the space occupied by sealing members
Solution Approach 1:
The first FPCB is disposed in a folded state within a specified proximity of the fourth edge, with a portion overlapping the display when viewed above the front surface plate. This nesting arrangement allows the FPCB to be accommodated within the device thickness rather than occupying lateral display area, thereby maintaining both waterproof sealing and maximum display area.
Solution Approach 2:
The sealing members are arranged to extend along the edges of the rear surface plate, with the first sealing member extending from a first end to a second end along the fourth edge, and the second sealing member extending from a third end to a fourth end along the first, second, and third edges. This edge-based arrangement in three-dimensional space allows waterproof sealing without intruding into the display area.
2Area of stationary object
If the display size is extended to meet consumer demand, then user experience is improved, but the sealing structure becomes more complex and difficult to implement
Solution Approach 1:
The sealing structure is divided into multiple sealing members: a first sealing member extending along the fourth edge, a second sealing member extending along the first, second, and third edges, and a third sealing member connecting them. This segmentation allows each sealing member to be independently positioned and secured, simplifying the overall implementation even as display size increases.
Solution Approach 2:
The third sealing member is disposed between the first end of the first sealing member and the third end of the second sealing member, and between the second end of the first sealing member and the fourth end of the second sealing member, connecting the first sealing member and the second sealing member. This intermediary element facilitates the integration of multiple sealing members into a cohesive waterproof structure, reducing overall complexity.
3Reliability
If sealing members are positioned along the borders to ensure waterproofing, then waterproof reliability is improved, but the available space for other components is reduced
Solution Approach 1:
The first FPCB is disposed in a folded state within a specified proximity of the fourth edge, nesting within the device thickness rather than occupying lateral space. This allows the FPCB to coexist with the border-positioned sealing members without reducing available volume for other components.
Solution Approach 2:
The sealing members are positioned along the edges of the rear surface plate in a three-dimensional arrangement, extending along the fourth edge and connecting corners. This edge-based positioning in spatial dimensions allows maximum utilization of the device volume while maintaining waterproof sealing, leaving the central area available for display and other components.
Data Source
Figure 1~2
Figure 3
Figure 4A
AI summary
According to an embodiment of the disclosure, an electronic device includes: a transparent front surface plate defining at least a portion of a front surface of the electronic device, and including a first edge and a second edge disposed on opposite sides, a third edge connecting one end of the first edge and one end of the second edge, and a fourth edge connecting another end of the first edge and another end of the second edge and disposed opposite the third edge; a rear surface plate defining at least a portion of a rear surface of the electronic device; a side housing surrounding at least a portion of a space between the front surface plate and the rear surface plate; a support disposed in the space and connected with the side housing or integrally formed with the side housing; a display disposed in the space and viewable through at least a portion of the front surface plate; a second flexible printed circuit board (FPCB) disposed to at least partially overlap the display when viewed above the front surface plate; a first FPCB connecting the display and the second FPCB, and disposed in a folded state within a specified proximity of the fourth edge and having a portion overlapping the display when viewed above the front surface plate; a first seal disposed between the first FPCB and the support, or between the second FPCB and the support, and extending from a first end to a second end along the fourth edge; a second seal disposed between the display and the support, and extending from a third end proximate the first end to a fourth end proximate the second end along the first edge, the third edge, and the second edge; and a third seal disposed between the first end of the first seal and the third end of the second seal, and between the second end of the first seal and the fourth end of the second seal, and connecting the first seal and the second seal.