Cooperative Communications with Multiple Master/Slaves in a Led Lighting Network

• US 20090284184A1
• Filed: 01/30/2009
• Published: 11/19/2009
• Est. Priority Date: 05/16/2008
• Status: Active Grant

• Current Assignee: Integrated Illumination Systems, Inc.
• Original Assignee: Integrated Illumination Systems, Inc.
• Inventors: Zampini, Thomas Lawrence II, Valois, Charles Bernard
• Granted Patent: US 8,264,172 B2
• Time in Patent Office: Days
• US Class Current: 315/312
• CPC Class Codes: H05B 47/18 via data-bus transmission
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The present disclosure presents a relatively inexpensive yet intelligent solution for assigning a status to a lighting device over a connection used for transmissions of power and/or intensity for the lighting device. The system leverage and utilizes an existing connection that is available in many traditional lighting systems to provide intelligence between lighting devices, such as assigning a master or slave status to a lighting fixture or a device. For example, a typical lighting fixture may have existing connections such as for wiring and powering up the lighting fixture to modulate intensity of the light emitted. The present solution described herein provides systems and methods for utilizing the same wire to assign a status to the lighting fixture without interrupting the power supplied to the lighting fixture or the intensity emitted from the lighting device.

Claims

1. A method of assigning a status to a lighting device of a plurality of lighting devices over a line, the method comprising:

a) receiving, by a first lighting device of a plurality of lighting devices connected via a line used for providing intensity to the plurality of lighting devices, a signal over the line providing intensity, the signal comprising a duty cycle within a time interval, the duty cycle comprising a plurality of portions, each of the plurality of portions comprising a duration of the duty cycle;

b) detecting, by the first lighting device, an instruction identified by at least a first portion of the plurality of portions of the duty cycle, the instruction identifying a status of one of a master or a slave for the first lighting device;

c) assigning, by the first lighting device, the status of the first lighting device to one of the master or the slave in response to the detecting of the instruction; and

d) emitting, by the first lighting device, light having intensity identified by at least the first portion of the duty cycle.

2. The method of claim 1, further comprising receiving, by the first lighting device the signal from a second lighting device of the plurality of lighting devices, the second lighting device having a status of the master.

3. The method of claim 1, further comprising detecting, by the first lighting device, an identifier identified by at least a second portion of the duty cycle, the identifier identifying the first lighting device of the plurality of lighting devices and assigning to the first lighting device the status of one of the master or the slave based on detecting of the identifier.

4. The method of claim 1, further comprising emitting, by the first lighting device, light having intensity identified by at least the first portion of the duty cycle and at least a second portion of the plurality of portions of the duty cycle.

5. The method of claim 1, further comprising emitting, by the first lighting device, light having intensity identified by the plurality of portions of the duty cycle.

6. The method of claim 1, wherein the line is further comprising receiving transmission of power to the first lighting device.

7. The method of claim 1, further comprising

receiving, by the first lighting device, a second signal over the line, the second signal comprising a second duty cycle within a second time interval, the second duty cycle comprising a second plurality of portions, each of the second plurality of portions comprising a duration of the second duty cycle;

detecting, by the first lighting device, that the second signal does not comprise an instruction; and

emitting, by the first lighting device, light having intensity identified by the second signal.

8. The method of claim 1, further comprising

receiving, by a second lighting device of the plurality of lighting devices from the first lighting device, a second signal over the line, the second signal comprising a second duty cycle within a second time interval, the second duty cycle comprising a second plurality of portions, each of the second plurality of portions comprising a duration of the second duty cycle;

detecting, by the second lighting device, a second instruction identified by at least a first portion of the second duty cycle, the second instruction identifying the status of one of a master or a slave for the second lighting device;

assigning, by the first lighting device to the second lighting device, the status of the second lighting device to one of the master or the slave in response to the detecting of the instruction; and

emitting, by the second lighting device, light having intensity identified by at least the second duty cycle.

9. A system of a lighting device of a plurality of lighting devices assigning a status of a master or a slave over a line used by the plurality of lighting devices to provide intensity, the system comprising:

a first lighting device of a plurality of lighting devices connected via a line used for providing intensity to the plurality of lighting devices, the first lighting device receiving a signal over the line, the signal comprising a duty cycle within a time interval, the duty cycle comprising a plurality of portions, each of the plurality of portions comprising a duration of the duty cycle;

a detector of the first lighting device detecting an instruction identified by at least a first portion of the plurality of portions of the duty cycle, the instruction identifying a status of one of a master or a slave for the first lighting device;

an addressor of the first lighting device assigning the status of the first lighting device to one of the master or the slave in response to detecting of the instruction; and

the first lighting device emitting light having intensity identified by at least the first portion of the duty cycle.

10. The system of claim 9, wherein the first lighting device receives the signal from a second lighting device of the plurality of lighting devices, the second lighting device having a status of the master.

11. The system of claim 9, wherein the detector detects an identifier identified by at least a second portion of the duty cycle, the identifier identifying the first lighting device of the plurality of lighting devices, and the addressor assigns to the first lighting device the status of one of the master or the slave based on detecting the identifier.

12. The system of claim 9, wherein the first lighting device emits light having intensity identified by at least the first portion of the duty cycle and at least a second portion of the plurality of portions of the duty cycle.

13. The system of claim 9, wherein the first lighting device emits light having intensity identified by the plurality of portions of the duty cycle.

14. The system of claim 9, wherein the first lighting device receives transmission of power via the line.

15. The system of claim 9, wherein the first lighting device receives a second signal over the line, the second signal comprising a second duty cycle within a second time interval, the second duty cycle comprising a second plurality of portions, each of the second plurality of portions comprising a duration of the second duty cycle;

the detector detects that the second signal does not comprise an instruction; and

the first lighting device emits light having intensity identified by the second signal.

16. The system of claim 9, wherein a second device of the plurality of lighting devices receives from the first lighting device a second signal over the line, the second signal comprising a second duty cycle within a second time interval, the second duty cycle comprising a second plurality of portions, each of the second plurality of portions comprising a duration of the second duty cycle;

a second detector of the second lighting device detecting a second instruction identified by at least a first portion of the second duty cycle, the second instruction identifying the status of one of a master or a slave for the second lighting device;

a second addressor of the second lighting device assigning the status of the second lighting device to one of the master or the slave in response to the detecting of the instruction; and

the second lighting device emitting light having intensity identified by at least the second duty cycle.

17. A lighting device assigning a status of a master or a slave based on a signal received over a line used to receive intensity, the lighting device comprising:

a receiver connected via a line used for providing intensity to the lighting device, the receiver receiving a signal over the line, the signal comprising a duty cycle within a time interval, the duty cycle comprising a plurality of portions, each of the plurality of portions comprising a duration of the duty cycle;

a detector detecting an instruction identified by at least a first portion of the plurality of portions of the duty cycle, the instruction identifying a status of one of a master or a slave;

an addressor, responsive to the detector, assigning the status of the first lighting device to one of the master or the slave in response to detecting of the instruction; and

the lighting device emitting light having intensity identified by at least the first portion of the duty cycle.

18. The lighting device of claim 17, wherein the lighting device receives transmission of power via the line.

19. The lighting device of claim 17, wherein the lighting device receives intensity, the instruction and power via the line.

20. The lighting device of claim 17, wherein the receiver receives the signal from a second lighting device assigned a master status.