Since 2012, Apple has changed the iPhone charging interface to a smaller Lightning interface, which has been used ever since. After using this interface, the iPhone can not only be made thinner, but also can be inserted and removed on both sides when charging, so it is widely praised by consumers. In the past two years, Android manufacturers have gradually abandoned the Micro-USB interface that has been used for many years, and have replaced their own flagship machines with Type-C interfaces that can also be inserted and removed. For a time, this interface became the standard for high-end machines.
But soon consumers found that the Type-C interface is more convenient when charging, but the thickness is still not as thin as the Lightning interface. Some time ago, some consumers asked about a manufacturer who still insisted on providing Micro-USB to the flagship model. Why not give the flagship machine a new interface, the answer is: the new interface is not conducive to reducing the thickness. What is the reason why the USB Type-C interface is not as small as the Lightning interface?
In fact, USB Type-C is not just an interface specification, it is a technology that comes out with the specification of USB3.1.
Compared with USB3.0, the most direct change of USB3.1 is that the speed can reach 10Gbps. To achieve this speed, the first thing to solve is the problem of shielding. Look carefully at all versions of the USB port, with a shell on the outside. This shell is not only used for fixing, but also acts as a shield. The faster the bus speed, the higher the shielding requirements. Therefore, the main layer of the shell outside the Type-C, the main role is to shield interference.
The Lightning interface is not shielded outside, and the package of the connector alone is not enough, so the speed of the traditional Lightning interface can only reach the level of USB 2.0. (Note: This refers to the conclusions drawn from the official Lightning interface definition given by the official, because there are only 8 contacts in the Lightning interface, except for the power supply and GND, the remaining contacts are not enough to support USB3.0. )
Nowadays, the amount of data that we need to transmit in our daily life is getting bigger and bigger. If the data line can't guarantee the high-speed and stable transmission effect, then it is futile to do other things well. Therefore, for a wide range of USB Type-C interfaces, the size is good, and it is easy to plug and unplug. It is secondary. The most important thing is to ensure reliable transmission of 10Gbps signals without interference.
It is fast and small, and it is really difficult to achieve at the current technical level. There are always some aspects to make sacrifices. USB Type-C exists as a mainstream interface specification for the future, first of all to adapt to the needs of the market.