Multi-Modal Fingerprint Sensor for Mobile Terminal Unlocking
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Solution Overview
Problem
Current fingerprint identification devices in mobile terminals have limited features, primarily relying on skin contact for fingerprint collection, which restricts their functionality and security.
Innovation Solution
A mobile terminal with a fingerprint identification device comprising multiple fingerprint identification units, including capacitive, inductance, optical, and ultrasonic sensors, that can collect fingerprints from different types of surfaces and fingers, enhancing feature richness and security through diverse fingerprint collection methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single type of fingerprint identification unit is used, then the device structure is simple, but the feature richness and security are limited
Solution Approach 1:
The patent combines multiple types of fingerprint identification units (capacitive, inductance, optical, ultrasonic) into a single fingerprint identification device, allowing the device to collect fingerprints from different types of surfaces and fingers through diverse sensing methods, thereby enriching features and improving security
2Reliability
If multiple fingerprint identification units are used, then security and feature diversity improve, but the device complexity increases
Solution Approach 1:
The fingerprint identification device is designed with multi-functionality by incorporating different types of fingerprint identification units that can handle various finger conditions (wet, dry, injured fingers) and surface variations, ensuring high security and reliability across different scenarios
3Adaptability or versatility
If only skin contact-based fingerprint collection is used, then the device is simple to operate, but it cannot accommodate different finger conditions
Solution Approach 1:
The fingerprint identification device is segmented into multiple specialized units, each designed to handle specific finger conditions (capacitive for skin contact, inductance for metallic surfaces, optical for various conditions, ultrasonic for deep ridge detection), allowing the system to automatically select the appropriate unit based on the detected finger condition
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
Enriches the features of fingerprint identification by allowing multiple types of fingerprint sensors to collect fingerprints, improving security and efficiency by accommodating different finger conditions and surface variations, ensuring successful fingerprint unlocking operations.
Implementation Method 1
a capacitive fingerprint identification device can only collect fingerprint images through skin contact
Implementation Method 2
The fingerprint identification device at least includes two types of fingerprint identification units
Implementation Method 3
A mobile terminal with a fingerprint identification device comprising multiple fingerprint identification units, including capacitive, inductance, optical, and ultrasonic sensors
Implementation Method 4
A mobile terminal with a fingerprint identification device comprising multiple fingerprint identification units, including capacitive, inductance, optical, and ultrasonic sensors
Data Source
AI summary
An unlocking control method and a mobile terminal are provided. The mobile terminal includes a fingerprint identification device. The fingerprint identification device includes N fingerprint identification units. A fingerprint collecting surface of at least one of N fingerprint identification units is configured to wait for a touch of a user in a process of fingerprint collecting. The fingerprint identification device at least includes two types of fingerprint identification units.