Exclusive or (XOR) lamp driver and lamp
First Claim
1. A 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 operatively coupled to a marker function wire of a vehicle;
a turn function input operatively coupled to a turn function wire of said vehicle;
a lamp driver output;
a first diode having a first anode and a first cathode, the first anode operatively connected to the marker function input;
a second diode having a second anode and a second cathode, the second anode operatively connected to the turn function input, the second cathode operatively connected to the first cathode; and
a first switching device configured to supply power to the lamp driver output through at least one of the diodes if either the turn input or marker input is high, the first switching device further configured to block power to the lamp driver output if both the turn and marker inputs are high.
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Accused Products
Abstract
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.
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Citations
30 Claims
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1. A 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 operatively coupled to a marker function wire of a vehicle; a turn function input operatively coupled to a turn function wire of said vehicle; a lamp driver output; a first diode having a first anode and a first cathode, the first anode operatively connected to the marker function input; a second diode having a second anode and a second cathode, the second anode operatively connected to the turn function input, the second cathode operatively connected to the first cathode; and a first switching device configured to supply power to the lamp driver output through at least one of the diodes if either the turn input or marker input is high, the first switching device further configured to block power to the lamp driver output if both the turn and marker inputs are high. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A lamp, 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 operative to receive a marker function signal from a vehicle; a turn function input operative to receive a turn function signal from said vehicle; a lamp driver output; a lamp having a lamp power input operatively coupled to said lamp driver output; and a first diode having a first anode and a first cathode, the first anode operatively connected to the marker function input; a second diode having a second anode and a second cathode, the second anode operatively connected to the turn function input, the second cathode operatively connected to the first cathode; and a first switching device configured to supply power to the lamp driver output through at least one of the diodes if either the turn input or marker input is high, the first switching device further configured to block power to the lamp driver output if both the turn and marker inputs are high. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
Specification