Flexible Circuit Board Segmentation for Narrow Frame Stress
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Solution Overview
Problem
The bending of flexible circuit boards in display panels leads to stress concentration, which can cause the bending region to break, reducing product yield.
Innovation Solution
Incorporating second ends on the connecting portion of the flexible circuit board, which extend from the first end to the display region, helps disperse stress and prevent cracking during bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the flexible circuit board is bent to the back of the screen to achieve narrow frame, then the frame width is reduced, but stress concentration occurs in the bending region causing the circuit board to break
Solution Approach 1:
The connecting portion of the flexible circuit board is divided into multiple segments (first end, at least one second end, and intermediate portions). This segmentation allows the structure to better distribute bending stresses across multiple discrete regions rather than concentrating them in a single continuous path, thereby improving reliability during the bending process required for narrow frame design.
Solution Approach 2:
The patent applies different structural configurations to different regions of the flexible circuit board. The connecting portion has a specific multi-end structure that differs from the main body portion, with each end extending in specific directions to optimize stress distribution locally in the bending region while maintaining overall connectivity.
2Shape
If the flexible circuit board is bent to achieve narrow frame, then the aesthetic appearance is improved, but the product yield decreases due to cracking in bent region
Solution Approach 1:
By segmenting the connecting portion into multiple ends and intermediate portions, the patent creates a structure that can accommodate bending without creating critical stress concentrations that would cause cracking. This allows the frame to achieve the desired narrow appearance while maintaining high product yield through reduced failure rates.
3Length of stationary object
If the flexible circuit board is bent to the back of the screen, then the narrow frame design is achieved, but stress concentration occurs especially in the peripheral area of the bending region
Solution Approach 1:
The connecting portion is segmented into multiple ends (first end and at least one second end) with intermediate portions connecting them. This segmentation distributes the stress from bending across multiple discrete attachment points and intermediate regions, preventing stress concentration in any single peripheral area of the bending region while enabling the narrow frame design.
Solution Approach 2:
The patent extends the connecting portion in multiple directions (first end extending in a first direction, second end extending in a second direction) rather than in a single linear path. This multi-dimensional configuration distributes stress across different spatial dimensions, reducing stress concentration in the bending region while achieving the desired frame width.
Data Source
AI summary
A display device, including: a display panel, the display panel including a display region and a binding region disposed outside the display region; a flexible circuit board comprising a main body portion and a connecting portion disposed on one side of the main body portion, the connecting portion being disposed on the binding region; wherein, the connecting portion includes a first end, and at least one second end connected to the first end and extending in a direction from the first end to the display region.