Mobile phones did not have a USB interface at the beginning, but with the popularity of audio and mobile phone cameras, mobile phones have the need to interact with PCs to transfer music and photos. However, at that time, there was no unified standard for the charging interface of mobile phones. The charging interfaces of various mobile phone brands were varied, with all styles, and the data cables were not compatible.
With the rise of Windows mobile phones and PDAs, the charging interface standard of mobile phones has finally been unified. This is the earliest USB interface, which is also used in card readers, digital cameras and other fields.
Mini USB
In the era of smart phones, with the gradual transition of mobile phones to lightweight, Mini USB undoubtedly restricts the reduction of the size of mobile phones, so Micro USB 2.0 came into being.
Micro USB
Compared with Mini USB, Micro USB 2.0 is much smaller in size. Until today, Micro USB 2.0 is still widely used in various devices, in addition to mobile phones, there are power banks, Bluetooth speakers, etc. However, it also has a big problem, that is, this flat trapezoidal interface often faces the embarrassment of reverse insertion, which not only wastes time, but also easily loses the life of the wire.
In addition, there is Micro USB 3.0. Compared with Micro USB 2.0, although the transmission speed will be faster, its interface is larger, it is inconvenient to plug and unplug, and the failure rate is also high, so it only exists on a few Samsung models. , and was gradually phased out.
Type-C
So, the more convenient Type-C interface is here! Different from previous products, Type-C is unique as soon as it comes out. It changes the irregularity of both ends of the charging interface in the past, and achieves the goal of "plugging both front and back". This is also after the launch of Type-C. One of the reasons for its immediate popularity in the digital world.
The reason why Type-C is so widespread
The size of Type-C is very small, only 8.3*2.5mm, which is very suitable for increasingly miniaturized devices; under the blessing of the USB3.1 protocol, the theoretical memory bandwidth is 10Gbps; it can provide a maximum power output of 100W, and it can also be used through It realizes bidirectional power supply; It can also transmit audio and video signals and expand to a variety of audio and video output interfaces, such as HDMI, DVI, VGA and other interfaces, and even realize the expansion of 4K resolution.
The advantage of Type-C is not only that the interface is small and can be plugged in both directions, but it can also integrate charging, data transmission and audio and video, greatly reducing the number of cables. More importantly, the application of Type-C is not limited to mobile phones, and now some computers, such as Apple's notebooks, have begun to use it. This means that Type-C may become a unified standard for mobile phones, computers and other digital fields in the future, which will bring great convenience to users.
In fact, there are two main aspects of data transmission, one is to provide power, and the other is data transmission. The current trend of mobile phone manufacturers must be non-porous. In fact, the current power of wireless charging can reach 15w. The next most difficult thing to solve for data lines is transmission. After that, there will be more data transmission scenarios. I believe that 5G can bring it.