Lighting device having a wireless communication antenna
The present invention relates to a lighting device ( 1, 1 a ) comprising an envelope ( 3 ), a carrier ( 4 ) arranged inside the envelope ( 3 ) and having solid state light sources ( 5 ) mounted on the carrier ( 4 ), driver circuitry ( 10 ) spaced apart from the carrier ( 4 ), at least one power line ( 9 ) connecting the solid state light sources ( 5 ) and the driver circuitry ( 10 ), and a wireless communication circuit ( 13 ) for receiving control signals, and for controlling the light output, during operation, from the solid state light sources ( 5 ). The wireless communication circuit ( 13 ) is connected to the at least one power line ( 9 ) for using the at least one power line ( 9 ) as a wireless communication antenna.
1. A lighting device comprising:
an envelope;
a carrier connected to a stem element, arranged inside said envelope and having solid state light sources mounted on said carrier;
driver circuitry spaced apart from said carrier;
at least one power line connecting said solid state light sources and said driver circuitry;
a wireless communication circuit configured to receive control signals, and control the light output, during operation, from said solid state light sources; and
wherein said wireless communication circuit is connected to said at least one power line for using said at least one power line as a wireless communication antenna,
wherein said at least one power line is formed by a carrier wire attached to said carrier and a stem wire attached to said envelope and connected to the carrier wire, and
wherein said at least one power line has an antenna portion that has a transceiving portion which is arranged between the solid-state light sources and the driver circuitry.
2. The lighting device according to claim 1 , wherein said antenna portion is connected in series between said wireless communication circuit and said solid state light sources.
3. The lighting device according to claim 2 , wherein said lighting device further comprises a first radio frequency choke connected in series between said antenna portion and said driver circuitry, and a second radio frequency choke connected in series between said antenna portion and said solid state light sources.
4. The lighting device according to claim 2 , wherein said wireless communication circuit is arranged on said carrier.
5. The lighting device according to claim 1 , wherein said antenna portion is connected in series between said wireless communication circuit and said driver circuitry.
6. The lighting device according to claim 5 , wherein said wireless communication circuit is arranged outside said envelope.
7. The lighting device according to claim 1 , wherein the lighting device comprises two power lines, and said wireless communication circuit is connected to both of said two power lines.
8. The lighting device according to claim 1 , further comprising a direct current choke connected in series between said at least one power line and said wireless communication circuit.
9. The lighting device according to claim 1 , wherein a length of said at least one power line is configured to correspond to a frequency at which the lighting device is to receive control signals.
10. The lighting device according to claim 1 , further comprising an exhaust tube arranged inside the envelope, wherein said carrier is a tubular light source carrier attached to the exhaust tube, the exhaust tube being arranged partly inside the tubular light source carrier.
11. The lighting device according to claim 1 , wherein said at least one power line and said wireless communication circuit are configured to receive wireless signals at radio frequencies.
12. The lighting device according to claim 1 , further comprising a connector for mechanically and electrically connecting the lighting device to a lamp socket.
13. The lighting device according to claim 1 , wherein the lighting device is a gas filled light bulb.