Features:
The uniqueness of the fingerprint makes it one of the biometric features for identification, and the fingerprint identification module is to realize the identification of individual fingerprint characteristics through a specific sensing module. In layman's terms, that is to say, each fingerprint mobile phone will have a fingerprint recognition module, through which the user's fingerprints are collected and converted into data, and then stored in a specific area of the mobile phone storage for use when needed. The key point of different fingerprint recognition technologies lies in the different ways of collecting fingerprints.
According to different ways of collecting fingerprints, fingerprint recognition modules are currently mainly divided into optical fingerprint recognition, capacitive fingerprint recognition and radio frequency fingerprint recognition.
1. Optical fingerprint recognition: It uses light reflection imaging to identify user fingerprints. This type of fingerprint module has certain requirements for the temperature and humidity of the environment, and the recognition accuracy is not ideal. It takes up more space, making it difficult to make a difference on the mobile side.
2. Capacitive fingerprint identification: It uses the silicon crystal element and the conductive subcutaneous electrolyte to form an electric field. The fluctuation of the fingerprint will cause different changes in the pressure difference between the two, so that accurate fingerprint determination can be achieved. This method has strong adaptability and no special requirements for the use environment. At the same time, the space occupation of silicon wafers and related sensing components is within the acceptable range of mobile phone design, so this technology has been well promoted in mobile phones. . Capacitive fingerprint recognition is also divided into two types: wipe type and press type. Although the former occupies a small volume, it has great disadvantages in terms of recognition rate and convenience. Communication terminal products such as mobile phones and tablets are generally operated more freely. , Press-type (capacitive) fingerprint recognition with higher recognition rate.
3. Radio frequency fingerprint identification: At present, it includes two kinds of radio wave detection and ultrasonic detection. The principle is similar to that of sonar for detecting seabed materials. The biggest advantage is that the finger does not need to be in contact with the fingerprint module, so it will not have much impact on the appearance of the phone.
The uniqueness of the fingerprint makes it one of the biometric features for identification, and the fingerprint identification module is to realize the identification of individual fingerprint characteristics through a specific sensing module. In layman's terms, that is to say, each fingerprint mobile phone will have a fingerprint recognition module, through which the user's fingerprints are collected and converted into data, and then stored in a specific area of the mobile phone storage for use when needed. The key point of different fingerprint recognition technologies lies in the different ways of collecting fingerprints.
According to different ways of collecting fingerprints, fingerprint recognition modules are currently mainly divided into optical fingerprint recognition, capacitive fingerprint recognition and radio frequency fingerprint recognition.
1. Optical fingerprint recognition: It uses light reflection imaging to identify user fingerprints. This type of fingerprint module has certain requirements for the temperature and humidity of the environment, and the recognition accuracy is not ideal. It takes up more space, making it difficult to make a difference on the mobile side.
2. Capacitive fingerprint identification: It uses the silicon crystal element and the conductive subcutaneous electrolyte to form an electric field. The fluctuation of the fingerprint will cause different changes in the pressure difference between the two, so that accurate fingerprint determination can be achieved. This method has strong adaptability and no special requirements for the use environment. At the same time, the space occupation of silicon wafers and related sensing components is within the acceptable range of mobile phone design, so this technology has been well promoted in mobile phones. . Capacitive fingerprint recognition is also divided into two types: wipe type and press type. Although the former occupies a small volume, it has great disadvantages in terms of recognition rate and convenience. Communication terminal products such as mobile phones and tablets are generally operated more freely. , Press-type (capacitive) fingerprint recognition with higher recognition rate.
3. Radio frequency fingerprint identification: At present, it includes two kinds of radio wave detection and ultrasonic detection. The principle is similar to that of sonar for detecting seabed materials. The biggest advantage is that the finger does not need to be in contact with the fingerprint module, so it will not have much impact on the appearance of the phone.