Signify Holding B.v.

Jan Souman

Lucas Josef Maria Schlangen

Tobias Borra

Marcel Petrus Lucassen

Björn Nicolaas Servatius Vlaskamp

The invention provides a lighting system () comprising:&#x2014;a lighting device () configured to provide light ();&#x2014;a sensor () configured to sense a user-related parameter selected from one or more of (a) a distance parameter (d) between the lighting device () and a user () and (b) an eye-activity parameter of the eye () of the user (); and&#x2014;a control system () is configured to control one or more lighting properties selected from a spectral power distribution of the light () and a light intensity I of the light () as function of the user-related parameter.

Lighting system that maintains melanopic lux levels at the eye regardless of distance to user

According to a first aspect disclosed herein, there is provided a controller for controlling a first light source to emit light into a pupil of a human user in order to reduce at least one biological effect of light from a second light source on the human user, the controller comprising: a first input for receiving light property data indicating a property of the light from the second light source, said property being of a type which causes a biological effect on the human user; a second input for receiving pupil data indicating a size of the pupil of the human user; an output for sending control commands to the first light source; a processor configured to: determine, using the light property data received via the first input, that the light from the second light source has said property; in response to said determination that the light from the second light source has said property, determine, using said pupil data received via the second input, a current size of the pupil; and on condition that the current size of the pupil is determined to be larger than a minimum size, control the first light source to emit light not having said property into the pupil and thereby reduce the size of the pupil.

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Eindhoven, Netherlands

Jan Souman