Display Module FPCB Support Member Restraint
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Solution Overview
Problem
In flat panel display modules, the flexible printed circuit board (FPCB)'s restoring force causes the panel to detach from the printed circuit board (PCB) when folded, leading to a gap between the two components.
Innovation Solution
A support member is integrated onto the FPCB, specifically a metal tape with a thin metal layer and adhesive, which is attached to the FPCB or panel, reducing the restoring force and preventing the panel from detaching from the PCB by restraining the FPCB's unfolding tendency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible printed circuit board (FPCB) is used to electrically connect the panel to the PCB, then the panel can be connected to the PCB in different planes, but the restoring force of the FPCB causes the panel to detach from the PCB
Solution Approach 1:
A support member is introduced as an intermediary element between the FPCB and the panel/PCB assembly. This support member counteracts the restoring force of the FPCB, preventing the panel from detaching while maintaining the electrical connection functionality. The support member acts as a mediator that balances the mechanical forces without interfering with the electrical signal transmission.
Solution Approach 2:
The support member functions as a counterweight to the restoring force generated by the flexible FPCB. By positioning the support member to oppose the unfolding tendency of the FPCB, it creates a balanced force system that maintains the panel in a stable connected state with the PCB, preventing detachment while preserving the flexibility needed for different plane connections.
2Adaptability or versatility
If the FPCB is made more flexible to accommodate different planes, then the adaptability improves, but the restoring force increases causing greater panel detachment
Solution Approach 1:
The support member serves as a mediator that counterbalances the increased restoring force resulting from enhanced FPCB flexibility. It provides the necessary opposing force to prevent panel detachment while allowing the FPCB to maintain its flexible characteristics for accommodating different plane positions and orientations.
Solution Approach 2:
The introduction of the support member changes the mechanical parameter balance of the system. By adding this counteracting element, the net restoring force is reduced to an acceptable level, allowing the FPCB to remain highly flexible for plane adaptation without causing excessive panel detachment force.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The support member effectively maintains the panel securely attached to the PCB, reducing the restoring force of the FPCB and ensuring the display module remains assembled.
Implementation Method 1
a metal tape with a thin metal layer and adhesive, which is attached to the FPCB or panel
Data Source
AI summary
Provided is a display module. The display module includes a panel, a printed circuit board (PCB), a flexible printed circuit board (FPCB), and a support member. The panel displays images. The PCB supplies driving signals to the panel. The FPCB electrically connects the PCB to the panel. The support member is formed on the FPCB.