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 housing; at least one optical transceiver comprising at least one LED and at least one photodetector; and a universal serial bus interface in communication with said at least one optical transceiver, said optical transceiver being constructed and arranged for engagement to, and communication with, 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 the unaided eyes of said individual, wherein said rapid flashes of light are configured for transmission of information or data, said optical transceiver further comprising at least one of a main circuit board, a receiver circuit board, and at least one lens disposed over said at least one light emitting diode.