Since Apple's first face recognition unlocking technology, major mobile phone manufacturers at home and abroad have followed suit. Is fingerprint unlocking really outdated? Qualcomm's Snapdragon Sense ID fingerprint ultrasonic recognition technology has attracted people's interest, biometric technology has become a battleground, and embedded touch may become the trend of future screen recognition.
In November 2017, Apple introduced the iPhone X, among which the most popular "Face Recognition Unlocking Technology" was launched by the public. The Apple also canceled the Home button design to achieve full screen and face. Unlocking the corresponding fingerprint unlocks but disappears on the Apple phone. Is fingerprint unlocking obsolete?
Traditional fingerprint unlocking is mostly capacitive technology using vertical sensing, such as Apple's Touch ID, but limited by the penetrating power limit (current capacitive technology can only penetrate about 300 to 350 μm thickness). Several companies such as Qualcomm and Fingerprint Cards (FPC) have also begun to develop "Fingerprints' ultrasonic sensing technology", while Taiwan's fingerprint identification chip maker Agis (Egis) is actively developing "optical" The fingerprint identification chip was also delivered in the third quarter and is expected to be supplied to Samsung's flagship model in 2018.
With Qualcomm's Snapdragon Sense ID fingerprinting technology, it can be embedded directly under glass or metal and capture fingerprints anywhere on the display panel, so there is no need to use the button (HOME button) to identify the fingerprint. The front glass does not need to be used. Opening the hole greatly increases the consistency of the appearance of the mobile phone.
In the current test, Qualcomm's technology is one of the few in-display technologies that can be used on AMOLED and LCD panels. Even in the case of wet fingers, it can be used normally. In June this year, it gathered in Shanghai. At the World Mobile Congress (MWC Shanghai), China's mobile phone manufacturer Vivo installed the second-generation ultrasonic fingerprint identification solution developed by Qualcomm in the panel of the Xplay 6 display machine, which was amazing and provided a test of the mass entity. A dedicated water tank is also available for testing underwater fingerprint unlocking technology.
Figure 1: New fingerprint recognition can be applied to OLED/LCD panels
In addition, Qualcomm's ultrasonic fingerprinting technology can also be applied to a variety of materials (including metal), one of the test results show that thick glass can also be normally sensed, a new generation of ultrasonic fingerprint identification module can penetrate With a thickness of 800μm protective glass or an aluminum plate with a thickness of 650μm, the Vivo phone can even use ultrasound penetration to detect blood flow and heartbeat.
Qualcomm's fingerprint identification technology is capable of sensing the skin layer and dermis layer of finger fingerprints. It can prevent rubber gloves from being fake, and has stronger ability to resist dirt, sweat and dust, and the prospects are highly promising. Although Vivo has demonstrated the application of Qualcomm's ultrasonic recognition technology to the public at the World Mobile Congress, the current cost is three to five times higher than that of the capacitive module, and the future release schedule has not yet been announced.
Biometric technology has become a battleground
The printer cable is the cable used to connect the printer and the computer. Generally divided into two types: USB printing cable and parallel port printing cable.
Generally, one side is a USB port to connect to a computer, and the other side is a PIN5 port to connect to a printer. The transmission speed is fast, and it can be hot-swapped. After connecting, the printer driver must be installed to print from the computer normally.
Parallel port print line:
Refers to the printing line that uses parallel transmission to transmit data. Because this interface is easily damaged and the transmission speed is slow, it is basically replaced by the USB interface.
Serial print line:
The serial port, also known as the serial communication interface (usually referred to as the COM interface), is an extended interface using serial communication.
A printer is one of the output devices of a computer and is used to print the results of computer processing on related media. There are three indicators to measure the quality of a printer: print resolution, print speed and noise. There are many types of printers. According to whether the printing element has a hitting action on the paper, it is divided into impact printers and non-impact printers. According to the structure of printing characters, it is divided into full-shaped character printers and dot-matrix character printers. According to the way a line of words is formed on paper, there are serial printers and line printers. According to the technology used, it is divided into cylindrical, spherical, inkjet, thermal, laser, electrostatic, magnetic, light-emitting diode and other printers.
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