Power supply socket, power receiving head, display device, power supply device and power supply method thereof

A power receiving head for mating with a power supply socket, wherein:

• the power supply socket comprises:
• a power supply socket housing;
• a conductive member provided in the power supply socket housing and connectable with a conductive portion on a power receiving head;
• a switching element provided in the power supply socket housing and having an output end and a control end, wherein the output end of the switching element is connected to the conductive member;
• and
• a control component provided in the power supply socket housing and connected to the control end of the switching element, and configured to detect the power receiving head, and control the switching element to be turned on when the control component detects the power receiving head, and control the switching element to be turned off when the control component does not detect the power receiving head;
• and
• the power receiving head comprises:
• a power receiving head housing;
• and
• a conductive portion provided in the power receiving head housing, and connectable to a conductive member on the power supply socket.