Pulsed light communication key

摘要

A Universal Serial Bus (USB) key may include an optical transceiver having a USB interface for engagement to an electronic device such as a laptop computer or other USB-configured device. The USB key may include a converter or buffering, isolation, modulation or amplification circuitry. The USB key sends and receives data signals which may be carried upon an optical transmission as generated by an LED light source which in turn is in communication with a host device such as a network processor. The USB key may also include operational amplifiers (op-amps) and transistor amplifiers.

主权项

1. A light emitting diode (LED) light communication device comprising:
a portable housing comprising at least one optical transceiver comprising at least one LED and at least one photodetector, said housing further comprising a universal serial bus interface in communication with said at least one optical transceiver, said universal serial bus interface being constructed and arranged for engagement to, and communication with a universal serial bus receiving port of an electronic device, said optical transceiver being further constructed and arranged for transmission of at least one transmitted light signal and receipt of at least one received light signal, said at least one transmitted light signal and said at least one received light signal each comprising a plurality of rapid flashes of light, said rapid flashes of light having a frequency which is not observable to an individual, wherein said rapid flashes of light are configured for transmission of information or data, said at least one received light signal being embedded within illumination, said at least one received light signal comprising at least one destination location identifier, wherein said communication device has a first state wherein said universal serial bus interface is unengaged to said universal serial bus receiving port and a second state wherein said universal serial bus interface is engaged to said universal serial bus receiving port, further wherein said at least one optical transceiver is constructed and arranged to establish an optical link for said at least one transmitted light signal and said at least one received light signal for said electronic device.