What is the difference between the power adapter and switching power supply?

What is the difference between the power adapter and switching power supply? 2019 - 12 - 05 switch power supply is a major categories, and power adapter belongs to the switching power supply. The power adapter, power adapter is refers to the things of electricity to provide equipment, such as LCD power adapter, and the printer power adapter, can not tender charger. Most of the notebook computer power adapter can automatically detect (100 ~ 240 v Alternating current (ac) of 50 ~ 60 hz) Basically all laptops are the external power supply, and host connected by a line, so that we can reduce the volume and weight of the host, only a handful of the electricity supply models built within the host, switch power supply, switching power supply is low dc 220 v voltage into a way of making, he is different from traditional power frequency transformer, use this switch technology transform voltage of power supply are called switching power supply, charger and power adapter is the switching power supply technology at present. At present, the switching power supply with small, lightweight and efficient features are widely used almost all electronic devices, is the rapid development of electronic information industry indispensable a way of power supply. What is the difference between the power adapter and switching power supply?