Curved Display Device Front Frame Gap for FPC Routing
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Solution Overview
Problem
Existing curved display devices face challenges in disassembling and rework due to foreign substance ingress and light leakage through openings in the bonding layer, making defect detection and repair difficult, and the firm bonding between the covering member and backlight complicates the process.
Innovation Solution
A display device design featuring a front frame that surrounds the entire outer circumference of the display panel, with a gap between the backlight and the inner wall surface of the front frame, allowing the flexible printed circuit board to pass through, and a closed ring-shaped bonding layer between the front frame and the covering member, preventing foreign substance entry and facilitating easy disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the covering member is firmly bonded to the backlight through a bonding layer, then the structural integrity and sealing are improved, but the ease of disassembly and rework is worsened
Solution Approach 1:
The bonding layer is segmented into a closed ring shape that surrounds the display panel rather than providing continuous full coverage. This segmentation maintains sealing integrity where needed while creating natural separation points that facilitate disassembly and rework operations.
2Ease of manufacture
If an opening is provided in the bonding layer to draw the FPC, then the ease of FPC installation is improved, but foreign substance ingress and light leakage are worsened
Solution Approach 1:
The front frame serves as an intermediary structure that provides a dedicated passage for the FPC to pass through. This intermediary element allows the FPC to be installed without creating an opening in the bonding layer, thereby maintaining the bonding layer's integrity and preventing foreign substance ingress and light leakage.
3Ease of operation
If an opening is provided in the bonding layer, then the FPC can be drawn through, but light leakage and foreign substance entry are worsened
Solution Approach 1:
The front frame acts as an intermediary structure that accommodates the FPC passage separately from the bonding layer. This allows the FPC to be drawn through the front frame rather than through the bonding layer, eliminating light leakage and foreign substance entry issues while maintaining ease of FPC installation.
4Reliability
If the bonding layer is made closed ring-shaped to prevent foreign substance entry, then the sealing is improved, but the complexity of the bonding structure is worsened
Solution Approach 1:
The bonding layer is designed as a closed ring shape that segments the bonding area to surround the display panel. This segmented approach provides effective sealing against foreign substances while maintaining relatively simple manufacturing processes and structures, avoiding excessive complexity.
Data Source
AI summary
According to an aspect, a display device includes: a covering member having a curved surface part; a display panel bonded to the curved surface part while being curved along the curved surface part; a front frame bonded to the curved surface part while surrounding the entire outer circumference of the display panel; a backlight that is fitted into the front frame, arranged to be opposed to the display panel, and has a gap between the backlight and part of an inner wall surface of the front frame; and a flexible printed circuit board, a first end of the flexible printed circuit board being electrically coupled to the display panel, and a second end of the flexible printed circuit board passing through the gap to be drawn to the outside of a space surrounded by the front frame.