Insulating Shielding Ring for Fingerprint Sensor Static Protection
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Solution Overview
Problem
Conventional electronic devices with fingerprint identifying elements face damage from static electricity, and current protection measures using metal rings increase material and manufacturing costs.
Innovation Solution
An electronic device design incorporating a physiological characteristic identifying module with an insulating static electricity shielding ring made of non-metal materials, which covers the identifying element and key cap to prevent static electricity damage while reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal ring is used to discharge static electricity and protect the fingerprint identifying element, then the reliability of protection is improved, but the material cost and manufacturing cost increase
Solution Approach 1:
The patent replaces the expensive metal ring with a low-cost insulating material ring that can be easily manufactured and disposed of. This insulating ring, while not providing active discharge like metal, still protects the fingerprint sensor by preventing static electricity buildup through its insulating properties, thereby achieving protection at significantly reduced material and manufacturing costs
Solution Approach 2:
The patent changes the material parameter from conductive metal to insulating material, fundamentally altering how static electricity protection is achieved. Instead of actively discharging static electricity through conduction, the insulating material prevents static electricity buildup by blocking charge transfer, thereby maintaining protection reliability while reducing costs
2Object-affected harmful factors
If a metal ring is disposed on the outer edge of the fingerprint identifying element, then static electricity protection is achieved, but the material cost increases
Solution Approach 1:
The patent substitutes the expensive metal ring with an inexpensive insulating ring made from materials like plastic or polymer. This insulating ring protects the fingerprint sensor by preventing static electricity accumulation through its insulating properties, achieving the same protective function against harmful static electricity while dramatically reducing material costs
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 solution effectively protects the fingerprint identifying element from static electricity damage at a lower cost by using a low-cost insulating material, ensuring reliable operation and reduced material expenses.
Implementation Method 1
an insulating static electricity shielding ring disposed on a rim of the physiological characteristic identifying element and covering an outer portion of the upper surface and at least a portion of a lateral surface of the physiological characteristic identifying element
Data Source
AI summary
An electronic device and a physiological characteristic identifying module are provided. The electronic device includes a case, a physiological characteristic identifying element, a cover plate, a key cap, and an insulating static electricity shielding ring. The case has a first hole. The physiological characteristic identifying element is disposed in the first hole. The cover plate is disposed on the case and has a second hole. At least a portion of an upper surface of the physiological characteristic identifying element is exposed by the second hole. The key cap is disposed in the second hole and located above the upper surface. The insulating static electricity shielding ring is disposed on the rim of the physiological characteristic identifying element and covers an outer portion of the upper surface and at least a portion of a lateral surface of the physiological characteristic identifying element.