CONTROL OF NETWORK LIGHTING SYSTEMS

• US 20130285574A1
• Filed: 12/09/2011
• Published: 10/31/2013
• Est. Priority Date: 12/22/2010
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Garcia Morchon, Oscar, Denteneer, Theodorus Jacobus Johannes
• Granted Patent: US 9,521,731 B2
• Time in Patent Office: Days
• US Class Current: 315/297
• CPC Class Codes: H04L 12/2803 Home automation networks
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H05B 45/00 Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 47/105 in response to determined parameters
• CPC Class Codes: H05B 47/175 by remote control
• CPC Class Codes: H05B 47/18 via data-bus transmission
• CPC Class Codes: H05B 47/19 via wireless transmission

Abstract

The invention relates to the control of networked lighting systems, particularly large scale networked lighting systems, and more specifically to an efficient transmission of messages to control luminaries of a networked lighting system. A basic idea of the invention is to provide an efficient and flexible multicast, particularly group cast message that addresses several or a group of luminaires, and that can control the addressed luminaries in an efficient way by compressing the distributed light settings using a function in order to reduce the communicational overhead. An embodiment of the invention relates to a method for controlling a networked lighting system comprising the steps of—selecting several controllable luminaries of the networked lighting system (S10), —combining control information for each one of the selected luminaries to a set of information control information (S12), —selecting at least one predetermined function for compressing the set of control information by associating an input related to a selected controllable luminary to the control information for the selected controllable luminary from the set of control information (S14), —creating a multicast message addressed to the selected luminaries and comprising information regarding the selected predetermined function (S16), and—transmitting the created multicast message (S18).

Claims

1. A method for controlling a networked lighting system comprising a plurality of controllable luminaries comprising the steps of:

selecting several controllable luminaries of the networked lighting system;

combining control information for each one of the selected luminaries to a set of control information;

selecting at least one predetermined function for compressing the set of control information, wherein the at least one predetermined function has as input values, luminary information for the selected luminaries and as output values the set control information for each one of the selected luminaries;

creating a multicast message addressed to the selected luminaries wherein the multicast message comprises a features field identifying the selected at least one predetermined function; and

transmitting the created multicast message.

2. The method of claim 1, wherein the selected predetermined function associates luminary information and contextual information as input related to a selected controllable luminary to the control information for the luminary from the set.

3. The method of claim 2, wherein

the selected predetermined function associates as luminaire information an address of a luminary and contextual information as input related to a selected controllable luminary to the control information for the luminary from the set and

the address is related to a physical position of the luminary in space or to a logical ordering of the luminaries of the networked lighting system.

4. The method of claim 3, wherein the luminaire information is chosen from:

luminary type;

luminary orientation;

luminary angle;

luminary location;

luminary color type.

5. The method of claim 2, wherein the contextual information is chosen from at least one of time room temperature, light level, room occupancy, activity in the room.

6. The method of claim 2, wherein

the information regarding the selected predetermined function comprises an indication to the selected predetermined function or the selected predetermined function.

7. The method of claim 2, wherein

the selected predetermined function is parameterized and the multicast message further comprises parameters of the selected predetermined function.

8. The method of claim 2, wherein the selected predetermined function is selected from the following group:

a step function and the information regarding the selected predetermined function comprises a start value of the function and a difference between successive values of the function;

a polynomial;

a periodic function and the information regarding the selected predetermined function comprises a basic function and direction or period.

9. The method of claim 2, wherein the control information for a selected luminary comprises one or more of the following:

an intensity value;

a dimming value;

a color setting value;

a beam width;

a beam direction.

10. The method of claim 2, wherein the created multicast message comprises

a network prefix field identifying the network for transmitting the multicast message,

a message type field identifying the message as multicast message,

a luminary related information field identifying one luminary or a group of luminaries of the networked lighting system, and

a features field identifying a predetermined function and parameters of the predetermined function.

12. The method of claim 10, wherein the at least one function for compressing the set of control information depends on parameters being computed to fit specific lighting needs with a computer program for lighting control in a light environment, wherein the computer program comprises

a target light distribution for the light environment,

an optimization process to calculate lighting settings of light sources for a number of parameters to obtain the target light distribution in the light environment, and

a modelling process to model the lighting settings of the light sources as a function dependent on a number of parameters.

16. A computer program enabling a processor to carry out a method of according to claim 1.

17. A non-transitory, computer readable storage medium storing a computer program according to claim 16.

18. A computer programmed to perform a method according to claim 1.

11. (canceled)

13. A lighting controller for a networked lighting system comprising

a processor being configured for:

selecting several controllable luminaries of the networked lighting system;

combining control information for each one of the selected luminaries to a set of control information;

selecting at least one predetermined function for compressing the set of control information, wherein the at least one predetermined function has as input values, luminary information for the selected luminaries and as output values the set control information for each one of the selected luminaries;

creating a multicast message addressed to the selected luminaries wherein the multicast message comprises a features field identifying the selected at least one predetermined function; and

transmitting the created multicast message, and

a transmitter for transmitting the multicast message over a network of a networked lighting system, wherein the multicast message comprises a features field identifying the selected predetermined function.

14. (canceled)

15. A luminary for a networked lighting system comprising

a receiver for receiving a multicast message from a lighting controller of a networked lighting system, wherein the multicast message comprises a luminary related information field identifying several selected luminaries and a features field identifying a selected predetermined function, wherein the predetermined function has as input values, luminaries information for a plurality of selected luminaries and as output values said control information for each one of the selected luminaries,

a controller being configured for combining the features field of the transmitted multicast message and the own luminary information to calculate the value of the predetermined function which corresponds to a specific luminary control information and to set a lighting created by the luminary in accordance to the specific luminary control information.