Illumination Control

A lighting system, which comprises a controller (2, 10), lighting units (6, 34, 48), and a light-sensing device, in which each lighting unit comprises a lighting source (12) and a modulated light source (14), the modulated light source is controlled to emit modulated light, which is different from modulated light emitted by other modulated light sources, the light-sensing device being suitable to sense modulated light in a viewing area (18), the controller and the sensing device being suitable to identify a lighting source and a modulated light source of the same lighting unit having emitted sensed modulated light and to determine control data from the sensed modulated light from the identified source pair, and the controller is suitable to control the lighting units dependent on the control data, characterized in that the modulated light source of a lighting unit has a radiation pattern which coincides substantially with a radiation pattern of the lighting source of the same lighting unit, for each modulated light source the sensing device measures the intensity of modulated light sensed by it from the modulated light source, the sensing device makes the control data to contain values of measured light intensities.

Lighting unit, which is suitable to be used in a lighting system which further comprises a controller (2, 10) and a light-sensing device, wherein the lighting unit comprising a lighting source (12) and a modulated light source (14), which is suitable to be controlled to emit modulated light, which is different from modulated light emitted by modulated light sources of different lighting units, characterized in that the lighting source and the modulated light source have substantially coinciding radiation patterns.

Sensing device, which is suitable to be used in a lighting system which further comprises a controller (2, 10) and lighting units (6, 34, 48), which are suitable to emit modulated light, wherein the light-sensing device is suitable to sense modulated light in a viewing area (18), and the sensing device and the controller being suitable to identify a lighting unit from which the sensing device received modulated light, characterized in that the sensing device is a part of a remote control device (16) of the system, the remote control device being suitable to transmit data about sensed modulated light and control commands to the controller.

Controller (2, 10), which is suitable to be used in a lighting system which further comprises lighting units (6, 34, 48), which are suitable to emit modulated light, and a light-sensing device, the sensing device and the controller being suitable to identify a lighting unit from which the sensing device received modulated light, and the controller is suitable to control the lighting units dependent on control data supplied to it, characterized in that it is suitable to receive data, which is transmitted by the sensing device and which contains values of modulated light intensities, which were measured by the sensing device for modulated light received by the sensing device from different, identified lighting units, and the controller controls the lighting units dependent on said received data.

Remote control device (42), which is suitable to be used in a lighting system which further comprises a controller (2, 10), lighting units (6, 34, 48), which are suitable to emit modulated light, and a light-sensing device, the sensing device and the controller being suitable to identify a lighting unit from which the sensing device received modulated light, and the controller is suitable to control the lighting units dependent on control data it receives, characterized in that it is suitable to transmit an activation command, such that the activation command is selectively received by one sensing device (40a) out of several sensing devices (40), the activation command being such that a sensing device (40a) receiving the command transmits the command to the controller, and the controller enables the sensing device having transmitted the command to provide the control data and the controller disables remaining sensing devices to provide the control data.