Display device with USB connectivity
A display device ( 20 ) with USB connectivity connects with one or more USB devices ( 30 ) via one or more USB ports ( 207 ). The display device includes a power module ( 201 ), a display controller ( 202 ), a switching circuit ( 203 ), and an OR gate circuit ( 204 ). The display controller connects to a host ( 10 ), and is used to control the switching circuit according to a current status of the host. When the host is in a power-saving mode or a power off mode, the display controller controls the switching circuit to be on. Accordingly, the OR gate circuit electrically couples the power module to the USB ports. The display device thus powers the USB devices. If the host is in a normal mode, the display controller controls the switching circuit to be off. Accordingly, the OR gate circuit electrically couples the host to the USB ports. The host thus powers the USB devices.
1. 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.
2. The display device with USB connectivity according to claim 1 , further comprising a button installed on the display device, which can be manually controlled by a user to control the switching circuit.
3. The display device with USB connectivity according to claim 1 , wherein the power module supplies the power from an external power source.
4. The display device with USB connectivity according to claim 1 , further comprising an adapting apparatus to adjust the power from the power module to match the USB ports.
5. A computer system, comprising:
a host; and
a display device, comprising:
a power module;
one or more USB ports, the USB ports having power pins, the power pins being for selectively coupling the power module or the host to 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 connected with the host and 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 the host; and
an OR gate circuit selectively coupling the power pins with the power module or with the host;
wherein the display controller controls the switching circuit to be on if the current status of the host is a power off mode or a power saving mode, whereupon the power module powers or charges the USB device; and the display controller controls the switching circuit to be off if the current status of the host is a normal mode, whereupon the host powers or charges the USB device.
6. The computer system according to claim 5 , further comprising a button installed on the display device, which can be manually controlled by a user to control the switching circuit.