The power adapter is actually a switching power supply, and its function is to take home 220 volts (foreign 110 volt AC power enters an ordinary LCD driver board can accept 12 volts DC (a single driver board accepts 15V24V). Generally speaking, 15-inch LCD power The average is about 20 watts, and the TV is only about 26 watts. Therefore, the general factory chooses standard output currents of 3-between 4.

Today's alternating current (ac) unites the country, and direct current (dc) is quietly brewing a revolution, and the key is already ordinary USB technology. This will not only bring a revolution to the power industry, but also better improve power efficiency and even promote the development of the Internet of Things. Various cables, incompatible connectors, and various adapters are trials for travelers. Edison's Revenge: USB or power will lead to today's revolution, even more dramatic changes.