Monitor for use with computer system and method of controlling supply of power to computer peripherals connected with the monitor

A method of controlling a power supply for use with a computer monitor, comprising the steps of:

• providing a power supply for the computer monitor for converting an externally applied alternating current (AC) power into a direct current (DC) power;
• providing a universal serial bus hub for the computer monitor having at least one upstream port and a plurality of downstream ports, said upstream port being electrically connected in communication with a computer system, and said plurality of downstream ports selectively receiving said direct current (DC) power in response to a power switching control signal in accordance with power supply control information from said computer system through said upstream port so as to selectively provide said direct current (DC) power to external devices respectively connected with said plurality of downstream ports in response to said power switching control signal;
• generating said power switching control signal in accordance with said power supply control information from said computer system;
• designating a downstream port of said plurality of downstream ports in response to said power switching control signal so as to supply said direct current (DC) power through the designated downstream port to a universal serial bus device connected with the designated downstream port;
• determining whether said direct current (DC) power through the designated downstream port is above a limit value of over-current;
• providing a signal indicative of more than the limit value of said over-current, when said direct current (DC) power through the designated downstream port is above the limit value of said over-current;
• and
• intercepting supply of said direct current (DC) power to said designated downstream port, when said direct current (DC) power through the designated downstream port is above the limit value of said over-current.