Anti-Shock Screw Structure for Flat Panel Display Modules
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Solution Overview
Problem
Conventional flat panel display modules suffer from over-tight connections between the printed circuit board and the back plate, leading to inadequate shock absorption and potential damage, as well as electromagnetic interference (EMI) and electrostatic discharge (ESD) issues due to insufficient ground connection.
Innovation Solution
The module incorporates a fastening element with a screw and non-screw portion, combined with a flexible separator, which prevents over-tightening and enhances ground connection by positioning the printed circuit board away from the back plate, using a resilient part to absorb displacement and improve electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the screw is tightly screwed to secure the printed circuit board to the back plate, then the structural strength is improved, but the flexible printed circuit may break due to excessive pulling stress
Solution Approach 1:
A resilient part (mediator element) is introduced between the printed circuit board and the back plate. This resilient part absorbs excessive tightening force and provides shock absorption, preventing the flexible printed circuit from breaking while maintaining adequate structural strength. The mediator element deforms elastically under shock loads, protecting the fragile flexible circuit connections.
Solution Approach 2:
The resilient part is pre-installed between the printed circuit board and back plate to provide beforehand cushioning. This cushioning layer is designed to absorb shock and distribute stress before any shock event occurs, preventing damage to the flexible printed circuit during shock events while maintaining the necessary structural strength.
2Stability of the object's composition
If the printed circuit board is tightly connected to the back plate, then the structural stability is improved, but electromagnetic disturbance and electrostatic discharge cannot be avoided
Solution Approach 1:
The resilient part serves as an electrical insulator (mediator) between the printed circuit board and the conductive back plate. This insulation prevents direct electrical contact, thereby blocking electromagnetic disturbance and electrostatic discharge pathways while still providing mechanical support and shock absorption. The mediator maintains structural stability through mechanical connection while preventing harmful electrical interactions.
3Strength
If the connection between printed circuit board and back plate is tight, then the anti-shock ability is reduced, but the structural strength is improved
Solution Approach 1:
The resilient part provides beforehand cushioning by being pre-installed in the connection path between the printed circuit board and back plate. This cushioning layer is designed to compress during shock events, absorbing impact energy and protecting the flexible printed circuit from damage while maintaining adequate connection strength under normal conditions.
Solution Approach 2:
The resilient part changes its physical parameters (compression, deformation) in response to shock loads. Under normal conditions, it maintains a rigid structure for strong connection, but under shock conditions, it compresses and deforms to absorb impact energy, thereby providing anti-shock ability while maintaining connection strength.
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
This design effectively enhances anti-shock capabilities, reduces the risk of damage from shocks, and mitigates EMI and ESD by ensuring a stable and secure electrical connection between the printed circuit board and the back plate.
Implementation Method 1
The flexible separator is disposed between the surface of the back plate and the printed circuit board and configured to push the printed circuit board away from the surface of the back plate
Implementation Method 2
The non-screw portion is positioned in the through hole with a gap between the non-screw portion and a side wall of the through hole
Implementation Method 3
The screw portion is inserted into the through hole of the printed circuit board and secured to the surface of the back plate
Data Source
AI summary
A flat panel display module having anti-shock screw-tightening structure is provided. The flat panel display module includes a display panel, a flexible printed circuit, a printed circuit board, a back plate, a fastening element, and a flexible separator. The display panel has a signal connecting end. One end of the flexible printed circuit is electrically connected to the signal connecting end while the other end is electrically connected to the printed circuit board. The printed circuit board has a through hole. The back plate accommodates the display panel. The flexible printed circuit is disposed across the back plate so that the printed circuit board is parallel to the back plate. The fastening element which has a length greater than the thickness of the printed circuit board passes through the through hole and is secured to the surface of the back plate. The flexible separator is disposed between the back plate and the printed circuit board and pushes the printed circuit board away from the back plate so that the printed circuit board touches against the fastening element. The flat panel display module maintains a space between the printed circuit board and the back plate to accomplish the purpose of anti-shock.