Fluorescent-based electroluminescent lighting
View Patent ↗An electroluminescent tube compatible with a conventional fluorescent lighting system is generally described in the present disclosure. One example electroluminescent tube may include a rectifying circuit, a driving circuit, and an electroluminescent device. The driving circuit is configured to drive the electroluminescent device upon receiving a power signal. The rectifying circuit is configured to bypass a starter route and also direct the power signal to the driving circuit through a power input route.
1. An electroluminescent tube, comprising:
first to fourth electrodes;
an electroluminescent device;
a driving circuit configured to drive the electroluminescent device upon receiving a power signal; and
a rectifying circuit configured to direct the power signal to the driving circuit through a power input route and bypass a starter route, wherein the rectifying circuit comprises
a first full bridge rectifier configured to support the power input route between the first electrode and the third electrode, and
a second full bridge rectifier configured to bypass the starter route between the second electrode and the fourth electrode.
2. The electroluminescent tube of claim 1 , wherein the first full bridge rectifier comprises:
a first diode having an anode coupled to the first electrode;
a second diode having an anode coupled to the third electrode and a cathode coupled to a cathode of the first diode;
a third diode having a cathode coupled to the first electrode; and
a fourth diode having an anode coupled to an anode of the third diode and a cathode coupled to the third electrode.
3. The electroluminescent tube of claim 2 , wherein the second full bridge rectifier comprises:
a fifth diode having an anode coupled to the second electrode;
a sixth diode having an anode coupled to the fourth electrode and a cathode coupled to a cathode of the fifth diode;
a seventh diode having a cathode coupled to the second electrode; and
an eighth diode having an anode coupled to an anode of the seventh diode and a cathode coupled to the fourth electrode.
4. An electroluminescent tube, comprising:
first to fourth electrodes;
an electroluminescent device;
a driving circuit configured to drive the electroluminescent device upon receiving a power signal; and
a rectifying circuit configured to direct the power signal to the driving circuit through a power input route and bypass a starter route,
wherein the rectifying circuit comprises
a first half bridge rectifier configured to support the power input route between the first electrode and the third electrode, and
a second half bridge rectifier configured to support the power input route between the second electrode and the fourth electrode.
5. The electroluminescent tube of claim 4 , wherein the first half bridge rectifier comprises:
a first diode having an anode coupled to the first electrode; and
a second diode having an anode coupled to the third electrode and a cathode coupled to a cathode of the first diode.
6. The electroluminescent tube of claim 5 , wherein the second half bridge rectifier comprises:
a third diode having an anode coupled to the second electrode; and
a fourth diode having an anode coupled to the fourth electrode and a cathode coupled to a cathode of the third diode.
7. A fluorescent-based electroluminescent lighting system, comprising:
an electroluminescent device;
a ballast configured to provide a power signal based on an input voltage;
a driving circuit configured to drive the electroluminescent device upon receiving the power signal;
a starter configured to support a starter route between a second terminal and a fourth terminal of the fluorescent-based electroluminescent lighting system; and
a rectifying circuit configured to bypass the starter route and direct the power signal to the driving circuit through a power input route between a first terminal and a third terminal of the fluorescent-based electroluminescent lighting system, wherein the rectifying circuit comprises
a first full bridge rectifier configured to support the power input route between the first electrode and the third electrode, and
a second full bridge rectifier configured to bypass the starter route between the second electrode and the fourth electrode.
8. The fluorescent-based electroluminescent lighting system of claim 7 further comprising an electroluminescent tube, wherein the electroluminescent tube includes the rectifying circuit, the electroluminescent device, and first to fourth electrodes, each coupled to one of the first to fourth terminals.
9. The fluorescent-based electroluminescent lighting system of claim 7 , wherein the starter is configured to allow the power signal to pass through the starter route when a fluorescent tube is installed at the four terminals.
10. The fluorescent-based electroluminescent lighting system of claim 8 , wherein the first full bridge rectifier comprises:
a first diode having an anode coupled to the first electrode and a cathode coupled to the driving circuit;
a second diode having an anode coupled to the third electrode and a cathode coupled to the driving circuit;
a third diode having an anode coupled to a bias voltage and a cathode coupled to the first electrode; and
a fourth diode having an anode coupled to the bias voltage and a cathode coupled to the third electrode.
11. The fluorescent-based electroluminescent lighting system of claim 8 , wherein the second full bridge rectifier comprises:
a fifth diode having an anode coupled to the second electrode and a cathode coupled to the driving circuit;
a sixth diode having an anode coupled to the fourth electrode and a cathode coupled to the driving circuit;
a seventh diode having an anode coupled to a bias voltage and a cathode coupled to the second electrode; and
an eighth diode having an anode coupled to the bias voltage and a cathode coupled to the fourth electrode.
12. The fluorescent-based electroluminescent lighting system of claim 10 , wherein the electroluminescent tube is installed in a first orientation, so that the first full bridge rectifier is configured to direct the power signal to the driving circuit through the first electrode, the first diode, the fourth diode, and the third electrode during a positive cycle of the input voltage and through the third electrode, the second diode, the third diode, and the first electrode during a negative cycle of the input voltage.
13. The fluorescent-based electroluminescent lighting system of claim 10 , wherein the electroluminescent tube is installed in a second orientation, so that the first full bridge rectifier is configured to direct the power signal to the driving circuit through the third electrode, the second diode, the third diode, and the first electrode during a positive cycle of the input voltage and through the first electrode, the first diode, the fourth diode, and the third electrode during a negative cycle of the input signal.
14. A fluorescent-based electroluminescent lighting system, comprising:
an electroluminescent device;
a ballast configured to provide a power signal based on an input voltage;
a driving circuit configured to drive the electroluminescent device upon receiving the power signal;
a starter configured to support a starter route between a second terminal and a fourth terminal of the fluorescent-based electroluminescent lighting system; and
a rectifying circuit configured to bypass the starter route and direct the power signal to the driving circuit through a power input route between a first terminal and a third terminal of the fluorescent-based electroluminescent lighting system, wherein the rectifying circuit comprises
a first half bridge rectifier configured to support the power input route between the first electrode and the third electrode, and
a second half bridge rectifier configured to bypass the starter route between the second electrode and the fourth electrode.
15. The fluorescent-based electroluminescent lighting system of claim 14 , wherein the first half bridge rectifier comprises:
a first diode having an anode coupled to the first electrode and a cathode coupled to the driving circuit; and
a second diode having an anode coupled to the third electrode and a cathode coupled to the driving circuit.
16. The fluorescent-based electroluminescent lighting system of claim 15 , wherein the electroluminescent tube is installed in a first orientation, so that the first half bridge rectifier is configured to direct the power signal to the driving circuit through the first electrode and the first diode during a positive cycle of the input voltage and through the third electrode and the second diode during a negative cycle of the input voltage.
17. The fluorescent-based electroluminescent lighting system of claim 15 , wherein the electroluminescent tube is installed in a second orientation, so that the first half bridge rectifier is configured to direct the power signal to the driving circuit through the third electrode and the second diode during a positive cycle of the input voltage and through the first electrode and the first diode during a negative cycle of the voltage signal.
18. The fluorescent-based electroluminescent lighting system of claim 15 , wherein the second half bridge rectifier comprises:
a third diode having an anode coupled to the second electrode and a cathode coupled to the driving circuit; and
a fourth diode having an anode coupled to the fourth electrode and a cathode coupled to the driving circuit.