Exclusive OR (XOR) lamp driver and lamp

摘要

A lamp and lamp driver are disclosed, in which single intensity marker lamps that are desired to be flashed can be connected to a lamp driver employing an exclusive OR (XOR) logic circuit. In one application, this lamp driver is coupled to a vehicle turn function wire and marker function wire, and a plurality of marker lamps in a row can be of the same style, but one lamp can be flashed in the row of marker lamps. In some embodiments, if all of the marker lamps are on, the lamp being driven by the XOR driver circuit will flash out of sequence with the turn signal flash. If all of the marker lamps are off, the lamp being driven by the XOR driver circuit will flash in sequence with the turn signal flash. Other embodiments are disclosed.

主权项

1. A vehicle lamp driver, comprising:
a logic circuit operative to implement an exclusive OR (XOR) logic function between its inputs and its output, the logic circuit comprising:
a marker function input;a turn function input;a ground input;a lamp driver output; anda first switching device having a first power input operatively coupled to said marker and turn function inputs, a first power output operatively coupled to said lamp driver output, and a first control input; wherein the first switching device is operable to interrupt current flow from said first power input to said first power output when only one of the marker function input and turn function input is activated; and wherein the first switching device is operable to interrupt current flow from said first power input to said first power output when only one of the marker function input and turn function input is activated.