SUPPLEMENTAL LOAD CIRCUIT FOR LOW POWER TRAFFIC LAMPS
First Claim
1. A supplemental load circuit configured to provide a supplemental power consumption to enable a lamp unit operating at a low power consumption to operate with a traffic controller configured to test for a higher power consumption, the supplemental load circuit comprising:
- a load;
power input circuitry configured to receive a DC power signal from the lamp unit; and
a control switch configured to receive a control signal having a duty cycle from the lamp unit;
wherein the control switch is configured to control application of the DC power signal to the load by the power input circuitry based on the duty cycle of the control signal.
6 Assignments
0 Petitions
Accused Products
Abstract
The present disclosure provides a supplemental load circuit configured to provide a supplemental power consumption to enable a lamp unit operating at a low power consumption to operate with a traffic controller configured to test for a higher power consumption. The supplemental load circuit includes a load, power input circuitry configured to receive a DC power signal from the lamp unit, and a control switch configured to receive a control signal having a duty cycle from the lamp unit. The control switch is configured to control application of the DC power signal to the load by the power input circuitry based on the duty cycle of the control signal. The present disclosure also provides a method for enabling a lamp unit to operate with a traffic controller designed for higher power lamp units.
17 Citations
20 Claims
-
1. A supplemental load circuit configured to provide a supplemental power consumption to enable a lamp unit operating at a low power consumption to operate with a traffic controller configured to test for a higher power consumption, the supplemental load circuit comprising:
-
a load; power input circuitry configured to receive a DC power signal from the lamp unit; and a control switch configured to receive a control signal having a duty cycle from the lamp unit; wherein the control switch is configured to control application of the DC power signal to the load by the power input circuitry based on the duty cycle of the control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A traffic lamp comprising:
-
a power converter configured to convert an externally supplied AC power signal into a DC power signal; a lamp load, the lamp load being powered by the DC power signal; a supplemental load; a control command circuit configured to generate a control signal having a duty cycle; and a control switch configured to control application of the DC power signal to the supplemental load based on the duty cycle of the control signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for enabling a lamp unit to operate with a traffic controller designed for higher power lamp units, the method comprising:
-
receiving, at a control switch included in a supplemental load circuit, a control signal having a duty cycle; receiving, at the supplemental load circuit, a DC power signal from a power converter included in the lamp unit; and applying the DC power signal, using the control switch, to a supplemental load included in the supplemental load circuit based on the duty cycle of the control signal such that the lamp unit operates with the traffic controller. - View Dependent Claims (18, 19, 20)
-
Specification