Patent ID: 7451328

Claim:
A display device with USB (Universal Serial Bus) connectivity, comprising: a power module; and one or more USB ports, the USB ports having power pins, the power pins being for connecting the power module with one or more external USB devices to power or charge the USB devices; a switching circuit, positioned between the power module and the USB ports, configured for connecting or disconnecting the USB ports from the power module; a display controller configured for controlling the switching circuit to be on or off, to connect or disconnect the USB ports from the power module according to a current status of an associated host; and an OR gate circuit selectively coupling the switching circuit or the associated host to the power pins of the USB ports; wherein, the display controller controls the switching circuit to be on if the current status of the associated host is a power off mode or a power saving mode, whereupon the power module powers or charges the USB device; the display controller controls the switching circuit to be off if the current status of the associated host is a normal mode, whereupon the associated host is used to power or charge the USB device.