Lighting preference arbitration

1. A controller comprising:

an output for controlling one or more light source arranged to emit light to illuminate an environment; and

an input for receiving a signal output from at least one sensor;

wherein the controller is configured to:

identify presence of a user and at least one further user in said environment based on the signal output from the at least one sensor;

determine lighting preferences of the user and the at least one further user;

detect an orientation of the user and the at least one further user based on the signal output from the at least one sensor;

estimate a field of view of the user and the at least one further user based on the detected orientation of the user and the at least one further user;

determine that at least one light source of the one or more light source is positioned to emit light in both the field of view of said user and the field of view of said at least one further user, arbitrate between the lighting preferences of the user and the at least one further user to determine light settings to be applied to the at least one light source, and control said at least one light source based on the determined light settings,

wherein the controller is configured to perform said arbitration based on a comparison of a proportion of, or a location in, the field of view of the user in or at which the light emitted from the at least one light source is incident, and a proportion of, or a location in, the field of view of the at least one further user in or at which the light emitted from the at least one light source is incident.

2. The controller according to claim 1 , wherein

the determined light settings are based on (i) the lighting preferences of the user if the proportion of the field of view of the user is greater than proportion of the field of view of the at least one further user, or (ii) the lighting preferences of the at least one further user if the proportion of the field of view of the at least one further user is greater than proportion of the field of view of the user.

3. The controller according to claim 1 , wherein

the determined light settings are based on (i) the lighting preferences of the user if the light emitted from the light source is incident in the field of view of the user in a more central location than in the field of view of the at least one further user, or (ii) the lighting preferences of the least one further user if the light emitted from the light source is incident in the field of view of the least one further user in a more central location than in the field of view of the user.

4. The controller according to claim 1 , wherein the light settings to be applied to the at least one light source are determined based on the lighting preferences of the user and the at least one further user.

5. The controller according to claim 4 , wherein the light settings to be applied to the at least one light source are determined based on an average of the lighting preferences of the user and the at least one further user.

6. The controller according to claim 1 , the controller further comprising an input for receiving location information of the one or more light source from a memory, wherein the controller is configured to determine that said at least one light source is positioned to emit light in both the field of view of said user and the field of view of said at least one further user based on said location information.

7. The controller according to claim 1 , wherein the controller is configured to determine said light settings based on properties of the at least one light source.

8. The controller according to claim 7 , wherein the properties of the at least one light source comprise one or any combination of: a light source type of the at least one light source, an available color range of light emitted from the at least one light source, an available brightness range of light emitted from the at least one light source, and an available beam spread range of light output from the at least one light source.

9. The controller according to claim 1 , wherein the controller is further configured to control said at least one light source by transmitting said determined light settings to a lighting controller, the lighting controller configured to control said at least one light source based on received light settings.

10. The controller according to claim 1 , wherein the controller is configured to:

capture biometric information of the user based on the signal output from the at least one sensor, and

determine if the captured biometric information corresponds to biometric information stored in a memory coupled to the controller;

wherein if the captured biometric information corresponds to biometric information stored in said memory, the controller further configured to retrieve lighting preferences associated with the biometric information stored in said memory to determine lighting preferences of the user;

wherein if the captured biometric information does not correspond to biometric information stored in said memory, the controller further configured to retrieve default lighting preferences stored in said memory to determine lighting preferences of the user.

11. The controller according to claim 1 , wherein the controller is configured to:

capture biometric information of the at least one further user based on the signal output from the at least one sensor, and

determine if the captured biometric information corresponds to biometric information stored in a memory coupled to the controller;

wherein if the captured biometric information corresponds to biometric information stored in said memory, the controller further configured to retrieve lighting preferences associated with the biometric information stored in said memory to determine lighting preferences of the at least one further user;

wherein if the captured biometric information does not correspond to biometric information stored in said memory, the controller further configured to retrieve default lighting preferences stored in said memory to determine lighting preferences of the at least one further user.

12. The controller according to claim 1 , wherein the lighting preferences of the user comprise one or any combination of the user's preferred lighting brightness, lighting color, spread of light incident in the user's field of view, and light source type; and the lighting preferences of the at least one further user comprise one or any combination of the at least one further user's preferred lighting brightness, lighting color, spread of light incident in the at least one further user's field of view, and light source type.

13. The controller according to claim 1 , wherein the controller is configured to execute an image recognition algorithm to detect an orientation of the user's head to detect the orientation of the user and to detect an orientation of the least one further user's head to detect the orientation of the least one further user.

14. A lighting system comprising the controller of claim 1 , the one or more light source, and the at least one sensor.

15. A computer program product for performing sensing using a signal output from at least one sensor to control one or more lighting source to illuminate an environment, the computer program product comprising code embodied on a non-transitory computer-readable medium and configured so as when executed on one or more processing units to perform operations of:

identifying presence of a user and at least one further user in said environment based on the signal output from the at least one sensor;

determining lighting preferences of the user and the at least one further user;

detecting an orientation of the user and the at least one further user based on the signal output from the at least one sensor;

estimating a field of view of the user and the at least one further user based on the detected orientation of the user and the at least one further user;

determining that at least one light source of the one or more light source is positioned to emit light in both the field of view of said user and the field of view of said at least one further user, arbitrating between the lighting preferences of the user and the at least one further user to determine light settings to be applied to the at least one light source, and controlling said at least one light source based on the determined light settings,

wherein the arbitration is based on a comparison of a proportion of, or a location in, the field of view of the user in or at which the light emitted from the at least one light source is incident, and a proportion of, or a location in, the field of view of the at least one further user in or at which the light emitted from the at least one light source is incident.