Fingerprint Module Decorative Part Static Grounding
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Solution Overview
Problem
The decoration ring of fingerprint modules in mobile terminals generates static electricity due to human touch or friction, which negatively affects the module's reliability.
Innovation Solution
A fingerprint module design that includes a decorative part electrically connected to a ground terminal through a conductive element, such as conductive foam, to prevent static electricity from interfering with the module's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the decoration ring is made of metal material, then the appearance quality and aesthetic effect are improved, but static electricity is generated when human hands touch or the decoration ring is in friction process, which has a bad influence on the fingerprint module
Solution Approach 1:
The patent converts the harmful static electricity generated by the metal decoration ring into a beneficial feature by grounding it through a conductive layer. The conductive layer connects the metal decoration ring to the ground terminal, allowing static electricity to be safely discharged, thus transforming the harmful effect into a controlled and beneficial grounding mechanism that protects the fingerprint module.
Solution Approach 2:
The patent introduces a conductive layer as an intermediary between the metal decoration ring and the ground terminal. This conductive layer acts as a mediator that safely channels the static electricity generated by the metal decoration ring to the ground, preventing direct harmful effects on the fingerprint module while maintaining the aesthetic appearance of the metal decoration.
2Object-affected harmful factors
If the decoration ring is made of non-conductive material, then static electricity generation is reduced, but the aesthetic effect and appearance quality are compromised
Solution Approach 1:
The patent employs composite material structure where a metal decoration ring (providing aesthetic effect) is combined with a conductive layer (managing static electricity). This composite approach allows the metal decoration ring to maintain its appearance quality while the conductive layer ensures static electricity is properly grounded, thus achieving both aesthetic and functional requirements simultaneously.
3Reliability
If a conductive layer is added to ground the decoration ring, then static electricity is prevented from affecting the fingerprint module, but the device complexity increases
Solution Approach 1:
The patent merges the conductive layer with the adhesive layer, combining two functional layers into one integrated structure. The adhesive layer serves dual purposes: bonding the fingerprint pressing plate to the decoration ring and providing conductive properties for grounding. This merging reduces the number of separate components and simplifies the overall device structure while maintaining anti-static performance.
Solution Approach 2:
The adhesive layer is designed to serve multiple functions: it acts as both the bonding agent between components and the conductive layer for grounding the metal decoration ring. This multi-functionality reduces the need for separate conductive components, thereby simplifying the device structure while ensuring reliable anti-static protection for the fingerprint module.
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
Ensures reliable operation of the fingerprint module by grounding the decorative part, preventing static electricity from causing issues and enhancing the module's performance.
Implementation Method 1
a conductive element 4, wherein the conductive element 4 is interposed between the end of the circuit board component 3 and a bottom wall of the embedding groove 21 to electrically connect the decorative part 2 to the ground terminal through the circuit board component 3
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A fingerprint module (100) and a mobile terminal having the same, wherein said fingerprint module (100) comprises: a fingerprint recognition component; a decorative part (2), a front side of the decorative part (2) having an embedding groove (21), and the fingerprint recognition module being embedded within the embedding groove (21); a circuit board component (3), one end of the circuit board component (3) extending within the embedding groove (21), an end part of the circuit board component (3) being attached to a rear end face of the fingerprint recognition component, and the other end of the circuit board component (3) having a ground terminal; and a conductive element (4) being sandwiched between the end part of the circuit board component (3) and a bottom wall of the embedding groove (21), so that the decorative part (2) and circuit board component (3) are electrically connected.