Planar Flexible Printed Circuit Board Connection for Display Modules
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Solution Overview
Problem
The existing flexible printed circuit board assembly in display devices requires bending, leading to potential damage and reduced product reliability and yield due to bulges at the edge of the display module during operation and transportation.
Innovation Solution
Redesigning the flexible printed circuit board to include a second portion with connecting fingers that can be attached directly to a lead region and an extension region in the same plane, eliminating the need for bending and providing protection through a hollow part or matching thickness with the lead region, allowing direct attachment without bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the flexible printed circuit board is bent backwardly to attach at the opposite side of the liquid crystal display module, then the connecting fingers can be connected to the lead region, but a bulge is formed at the edge which may be destroyed or broken during operation and transportation, thereby decreasing product reliability and yield
Solution Approach 1:
The patent changes the spatial arrangement from a bent configuration (requiring the FPCB to fold back) to a planar configuration where the second portion extends in the same plane as the lead region. This dimensional change eliminates the bulge formation while maintaining electrical connection functionality.
Solution Approach 2:
Instead of bending the FPCB backwardly to reach the lead region, the patent inverts the approach by extending the second portion forward in the same plane as the lead region, thereby eliminating the need for bending while achieving the same connection purpose.
2Ease of operation
If the flexible printed circuit board is bent backwardly to attach at the opposite side, then the connecting fingers can reach the lead region, but the structure becomes complex and vulnerable to damage during operation and transportation
Solution Approach 1:
The patent simplifies the structure by changing from a bent, three-dimensional configuration to a flat, two-dimensional planar arrangement. The second portion of the FPCB extends in the same plane as the lead region, eliminating the complex bending structure and associated vulnerabilities.
3Volume of moving object
If the flexible printed circuit board is made thinner to reduce profile, then the device becomes more compact, but the FPCB becomes more susceptible to damage when bent
Solution Approach 1:
The patent resolves this contradiction by eliminating the bending requirement through a planar configuration. The second portion extends in the same plane as the lead region, allowing the FPCB to be made thinner for compactness without compromising strength, since the thin FPCB no longer undergoes stress-inducing bending.
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 solution enhances product reliability and yield by preventing damage from bending, reducing thickness, and eliminating the need for additional protective coatings, thereby improving the flatness and manufacturing efficiency of the display device.
Implementation Method 1
Connecting fingers 3 of the flexible printed circuit board 4 is attached at the lead region located at an outer end of the liquid crystal display module by thermo-compression through anisotropic conductive adhesive
Implementation Method 2
the connecting finger region of the flexible printed circuit board 4 and the lead region of the liquid crystal display module 1 are coated with an ultraviolet (UV) adhesive 5, so as to protect the flexible printed circuit board from being destroyed and eroded
Data Source
AI summary
The present disclosure provides a display device and a method for assembling the same. The display device includes an electronic device and a flexible printed circuit board. The electronic device includes a lead region and a port located at the lead region, the flexible printed circuit board includes a first portion and a second portion. The first portion is a connector; the second portion includes connecting fingers through which the flexible printed circuit board is connected to the port through the connecting finger. The second portion of the flexible printed circuit board is arranged at a predetermined region, the predetermined region comprises the lead region and an extension region which is arranged outside the lead region and in a same plane where the lead region is located.