Impedance controlled electronic lamp circuit
There is provided lamp ballast impedance controlled electronic lamp circuit, powered by a lamp ballast, for controlling a set of light emitting devices and being, comprising at least one connector, for connecting to the lamp ballast; and for receiving an AC signal; at least one filament control, associated with one of the at least one connector; a circuit for transforming the AC signal to a DC signal; a power convertor circuit; for receiving the DC signal and for processing the DC signal to provide a signal to power to the set of light emitting devices; a control and monitoring circuit; wherein the control and monitoring circuit monitors the DC signal and controls the impedance of either the at least one filament control or the power convertor circuit to control the set of light emitting devices.
1. An impedance controlled electronic lamp circuit, powered by a power source, for controlling a set of light emitting devices and being, comprising:
at least one connector, for connecting to the power source; and for receiving a power signal;
at least one filament control, associated with one of the at least one connector;
a power convertor circuit; for receiving the power signal and for processing the power signal to provide a signal to power to the set of light emitting devices; and
a control and monitoring circuit, including:
an input current port;
an input voltage plus (V+) port;
an input voltage minus (V−) port;
an output current port;
an output voltage plus (V+) port; and
an output voltage minus (V−) port;
wherein the control and monitoring circuit monitors the power signal and controls the impedance of either the at least one filament control or the power convertor circuit to control the set of light emitting devices.
2. An impedance controlled electronic lamp circuit of claim 1 wherein the power signal is an AC signal.
3. An impedance controlled electronic lamp circuit of claim 2 further comprising:
an AC overvoltage protection circuit, connected to the first and second ballast connections of the first and second connector.
4. An impedance controlled electronic lamp circuit of claim 2 further comprising a circuit for transforming the AC signal to a DC signal.
5. An impedance controlled electronic lamp circuit of claim 4 wherein the circuit for transforming the AC signal to a DC signal is a rectifier circuit.
6. An impedance controlled electronic lamp circuit of claim 5 further comprising a DC overvoltage protection circuit connected to an output of the rectifier circuit.
7. An impedance controlled electronic lamp circuit of claim 6 further comprising:
a power factor conditioning circuit, connected to an output of the rectifier circuit.
8. An impedance controlled electronic lamp circuit of claim 1 wherein the power signal is a DC signal.
9. An impedance controlled electronic lamp circuit of claim 1 further comprising:
a first connector, having a first power source connection and a second power source connection; and
a second connector, having a first power source connection and a second power source connection.
10. An impedance controlled electronic lamp circuit of claim 9 wherein the first power source connection and the second power source connection of the first connector are a first ballast connection and a second ballast connection and the first power source connection and the second power source connection of the second connector are a first ballast connection and a second ballast connection.
11. An impedance controlled electronic lamp circuit of claim 1 wherein the control and monitoring circuit comprises:
a filament control output port, connected to the at least one filament control to control the at least one filament control; and
an impedance control output port, connected to the power convertor circuit to control the power convertor circuit.
12. An impedance controlled electronic lamp circuit of claim 1 wherein the power source is a lamp ballast of a line voltage source.
13. An impedance controlled electronic lamp circuit of claim 12 wherein the line voltage source is a main power line supplying nominal rated 120V, 230V, 240V, 277 V or 347V line voltage.
14. An impedance controlled electronic lamp circuit of claim 1 wherein the control and monitoring circuit further comprises:
a feedback port.
15. An impedance controlled electronic lamp circuit of claim 14 wherein the control and monitoring circuit further comprises:
an external device communications input port; and
an external device communication output port.
16. An impedance controlled electronic lamp circuit as in claim 1 , wherein the lamp ballast controls a fluorescent lamp.
17. An impedance controlled electronic lamp circuit as in claim 1 , wherein the lamp ballast controls a High Intensity Discharge (HID) lamp.
18. An impedance controlled electronic lamp circuit as in claim 1 , wherein an external control signal, obtained though either direct connection to the electronic lamp's connector pins, or through indirect connection via optical, inductive or Radio Frequency interface, is used to control the electronic light emitting devices.