Patent ID: 6950610

Claim:
An optical communication interface module comprising a combined transmission module for processing a D+ electrical data signal supplied from a D+ port of a universal serial bus (USB) and a D− electrical data signal supplied from a D− port, and combining and transmitting the same through a first optical fiber line, and a combined reception module for processing the D+ and D− electrical data signal combined and received through a second optical fiber line and applying the D+ and D− electrical data signals to the D+ port and the D− port, respectively, wherein the combined transmission module comprises: a transmission driving circuit for generating an optical data signal corresponding to one of the D+ and D− electrical data signals supplied from the D+ and D− ports of the USB, to be applied to the first optical fiber line; and a transmission control switch for controlling the optical data signal to have a level of brightness higher than a first set value while the D+ electrical data signal supplied from the D+ port of the USB and the D− electrical data signal supplied from the D− port of the USB, are both maintained at a logic ‘low’ state, and controlling the transmission driving circuit.