To realize wireless charging of mobile phones and other products, there must be two parts: the transmitter, which is connected with the power supply and is responsible for emitting electric energy to a vast space; Receivers are usually installed on electronic products to receive electric energy. Wireless charging technology has been used in mobile phone products. Take iPhone as an example, in order to make it have wireless charging function, wireless charging manufacturers modified it and installed a kind of "clothes" similar to "apple skin". As a wireless charging receiver, it appears in the form of adding a mobile phone charging sleeve, but it may launch a related transformation product China. This shell is called "Qi Gate" and supports iPhone and BlackBerry, so users can experience this function first without changing their mobile phones. At the beginning of 20 13, the wireless charging receiver will be completely slimmed down and become a built-in wireless charging receiver chip in mobile phone products, only the size of a fingernail. Nokia, Philips, LG, Samsung, Sony Ericsson, iPhone, HTC, Google, ZTE, Sharp, RIM and many other internationally renowned mobile phone manufacturers are very supportive of this technology, and wireless chargers may also be bundled with mobile phones. At present, Xiaomi 2 does not support wireless charging for the time being. Features of wireless charging: 1. Theoretically, wireless charging technology is harmless to human health. The * * * vibration principle used in wireless charging is magnetic field * * * vibration, which is only transmitted between coils vibrating at the same frequency, and other equipment cannot accept this frequency band. In addition, the magnetic field used by wireless charging technology is harmless to human body. However, wireless charging technology is a new charging technology after all. Take the wireless charger of Maiyuan Technology as an example, many people will worry about whether the wireless charging technology will be just like when Wi-Fi and mobile phone antenna poles first appeared. In fact, technology itself is harmless. 2. Wireless charging technology uses magnetic vibration to transmit electric energy in the electric field and magnetic field between the charger and the equipment, while the coil and capacitor form * * * vibration between the charger and the equipment. 3. This system can be widely used in the future, such as the charging field of electric vehicles and the power transmission of computer chips. The charging time of the charging system developed by this technology is only one-fiftieth of the current one. 4. The conversion rate has always been a concern of many people. The research of MIT shows that the loss of wireless charging technology is lower than that of wired charging technology. The conversion rate of wireless charging is several percentage points higher than that of wired charging. High conversion is also a key factor for the application of wireless chargers in the world. However, wireless charging technology is also limited by distance. In the future, it is necessary to solve the problem of accurate positioning of long-distance transmission band and magnetic field range. 5. Core chip is one of the difficulties in the application of wireless charging technology products. Accurate radiation range control and magnetic field frequency control are all realized by chips.