IP Library › Granted Patent US 7,928,666
Granted Patent B2
US 7,928,666 · App. 11/989,404 · Granted Apr 19, 2011

Lighting system

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Quick Facts
Patent No.
US 7,928,666
App. No.
11/989,404
Granted
Apr 19, 2011
Kind
B2
Abstract

A lighting system comprising an electric lamp ( 1 ), especially a fluorescent lamp, which is provided with a first ( 11 ) and at least one second lamp coil ( 12 ). The lighting system further comprises an electronic ballast ( 2 ) that is electrically connected to the lamp coils ( 11, 12 ) and at least two additional light sources ( 31 a to 31 c; 32 a to 32 c ) which are interconnected in parallel. The parallel connection ( 3 ) of the two additional light sources ( 31 a to 31 c; 32 a to 32 c ) are serially connected between the first ( 11 ) and the second lamp coil ( 12 ).

Claims (14)

1. A lighting system comprising:

an electric lamp, which has a first and at least one second lamp filament;

an electronic ballast, which is electrically connected to the lamp filaments; and

at least two further light sources, which are connected in a parallel circuit with one another,

wherein the parallel circuit comprising the two further light sources is connected in series between the first and the second lamp filament, and

wherein a lamp filament preheating means is connected in series with the parallel circuit comprising the two further light sources.

2. The lighting system as claimed in claim 1 , wherein the at least two further light sources are electrically connected to a first terminal of the first lamp filament and a first terminal of the second lamp filament.

3. The lighting system as claimed in claim 1 , wherein the electronic ballast is electrically connected to a second terminal of the first lamp filament and to a second terminal of the second lamp filament.

4. The lighting system as claimed in claim 1 , wherein the two further light sources are in the form of LEDs and are connected in phase opposition to one another into the respective signal paths of the parallel circuit.

5. The lighting system as claimed in claim 1 , wherein the lamp filament preheating means is electrically connected to the first terminal of the second lamp filament.

6. The lighting system as claimed in claim 1 , wherein the lamp filament preheating means has a reactance, in particular a capacitor.

7. The lighting system as claimed in claim 1 , wherein a switch is connected in parallel with the parallel circuit comprising the further light sources.

8. The lighting system as claimed in claim 1 , wherein a reactance is connected in parallel with the parallel circuit comprising the further light sources.

9. The lighting system as claimed in claim 8 , wherein said reactance is a capacitor.

Assignments (1)
MERGER Recorded Feb 2, 2010
From: PATENT TREUHAND GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN MBH
To: OSRAM GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
Reel/Frame 023882/0382 →