Lighting system and method for controlling the same

• US 8,674,628 B2
• Filed: 12/29/2011
• Issued: 03/18/2014
• Est. Priority Date: 03/25/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Taehoon, Bang, Junwan, Park, Heegu
• Primary Examiner(s): Taningco, Alexander H
• Assistant Examiner(s): LO, CHRISTOPHER KWOK YEUNG
• Application Number:
  US13/340,238
• Publication Number:
  US 20120098446A1
• Time in Patent Office: 810 Days
• Field of Search: 315/209.R, 315/210, 315/224, 315/225, 315/86, 315/119, 315/127, 315/160, 315/161, 315171-173, 315186-193, 315291-299, 315306-311, 315/362, 340/286.01, 340/635, 340/815.45
• US Class Current: 315/312
• CPC Class Codes: H05B 47/19 via wireless transmission

Abstract

A lighting system automatically assigns a unique address to each lighting apparatus, and controls each lighting apparatus based on the assigned address. The lighting system may include a first lighting apparatus, a second lighting apparatus connected to the first lighting apparatus in series, and a bridge device coupled to the first and second lighting apparatuses in series and configured to assign an address to the first and second lighting apparatuses. The bridge device may transmit a first data packet to initialize the lighting apparatuses for address assignment, and a control circuit may disconnect the connections between the lighting apparatuses during address assignment.

Claims

1. A lighting system comprising:

a plurality of lighting apparatuses;

a bridge device coupled to the plurality of lighting apparatuses in series and configured to assign an address to the plurality of lighting apparatuses,

wherein each of the plurality of lighting apparatuses includes

a LED module,

an input port to receive data from the bridge device,

an output port to relay the address data to another lighting apparatus,

a connection circuit configured to electrically connect or disconnect a connection between the input port and the output port based on a connection between the at least one bridge device and the plurality of light apparatuses, and

a control circuit that controls the connection circuit based on the address, and

wherein the bridge device transmits a first data packet to initialize the plurality of lighting apparatuses for address assignment and, in response to the first data packet, the control circuit of each of the plurality of lighting apparatuses disconnects the connection with a subsequent lighting apparatus, and

the bridge device transmits a second data packet that includes a first address to a first lighting apparatus among the plurality of lighting apparatuses, wherein

a first control circuit included in the first lighting apparatus determines whether an address assignment is needed in the first lighting apparatus, assigns the first address to the first lighting apparatus based on the determination, and connects the first connection to a second lighting apparatus among the plurality of lighting apparatuses.

2. The lighting system of claim 1, wherein each of the plurality of the lighting apparatus determines whether an address assignment is needed based on whether a previously assigned address exists.

3. The lighting system of claim 2, wherein, if the first control circuit determines that the previously assigned address does not exist, the first control circuit assigns the first address to the first lighting apparatus.

4. The lighting system of claim 3, wherein the first control circuit transmits a confirmation to the bridge device if the first address is successfully assigned to the first lighting apparatus.

5. The lighting system of claim 4, wherein the bridge device transmits a third data packet that includes a second address to the second lighting apparatus through the first lighting apparatus in response to the confirmation.

6. The lighting system of claim 5, wherein the second control circuit determines whether a previously assigned address exists for the second control circuit, and

if the previously assigned address does not exist, the second controller assigns the second address to the second lighting apparatus, and

if the previously assigned address exists, the second controller connects the second connection to the subsequent lighting apparatus and forwards the second address through the second connection.

7. The lighting system of claim 2, wherein, if the first control circuit determines that the previously assigned address exists, the first control circuit forwards the first address to the second lighting apparatus through the first connection.

8. The lighting system of claim 1, wherein, in response to the first data packet, the first and second control circuits deletes previously assigned addresses in the first and second control circuits.

9. The lighting system of claim 1, wherein the bridge device periodically sends a query to the serially connected lighting apparatuses to detect a lighting apparatus that requires address assignment.

10. The lighting system of claim 9, wherein the lighting apparatus that requires address assignment transmits a request for address assignment to the bridge device through the serial connection.

11. The lighting system of claim 10, wherein the bridge device transmits the first data packet in response to the request for address assignment.

12. The lighting system of claim 11, wherein the bridge device sequentially assigns an address to all serially connected lighting apparatuses in response to the request for address assignment from at least one of the lighting apparatuses.

13. The lighting system of claim 10, wherein the lighting apparatus that requires address assignment is at least one of the first or second lighting apparatuses.

14. The lighting system of claim 10, wherein the lighting apparatus that requires address assignment is a newly added or replaced lighting apparatus.

15. The lighting system of claim 1, wherein the bridge device is connected in series to the first and second lighting apparatuses according to a RS-485 communication protocol.

16. The lighting system of claim 1, wherein the bridge device is configured based on a ZigBee standard.

17. A method for controlling a plurality of lighting apparatuses, wherein each of the plurality of lighting apparatuses includes a LED module, an input port to receive data from the bridge device, an output port to relay the address data to another lighting apparatus, a connection circuit configured to electrically connect or disconnect a connection between the input port and the output port based on a connection between the at least one bridge device and the plurality of light apparatuses, and a control circuit that controls the connection circuit based on the address, the method comprising:

receiving a periodic signal from a bridge device to detect a lighting apparatus that requires address assignment, the plurality of lighting apparatuses connected in series;

transmitting a request for address assignment to the bridge device;

receiving a first data packet to initialize the plurality of lighting apparatuses for address assignment;

initializing the plurality of lighting apparatuses for address assignment in response to the first data packet, wherein a control circuit of each of the plurality of lighting apparatuses disconnects a connection with subsequent lighting apparatuses, and;

receiving a second data packet that includes a first address to a first lighting apparatus among the plurality of lighting apparatuses;

sequentially assigning an address to the plurality of lighting apparatuses; and

controlling the plurality of lighting apparatuses based on the assigned addresses,

wherein the method further comprises determining whether an address assignment is needed in the first lighting apparatus, assigning the first address to the first lighting apparatus based on the determination, and connecting the first connection to a second lighting apparatus among the plurality of lighting apparatuses.

18. The method according to claim 17, wherein the initializing includes disconnecting a data connection between each of the plurality of lighting apparatuses and a subsequent lighting apparatus, and the sequentially assigning includes reconnecting the data connection after the address is assigned.