Signify Holding B.v.

Marcel Petrus Lucassen

Tobias Borra

Dragan Sekulovski

Martinus Petrus Joseph Peeters

Olexandr Valentynovych Vdovin

Lucas Josef Maria Schlangen

Cornelis Teunissen

Marcus Theodorus Maria Lambooij

Jan Souman

The invention provides a light generating system () configured to generate in a first operational mode of the light generating system () system light (), wherein: the system light () in the first operational mode has a spectral power distribution with at least 85% of the spectral power in three emission bands () comprising (i) a first emission band () having a centroid wavelength of 445 nm +/−25 nm and having a full width half maximum of at maximum 25 nm, (ii) a second emission band () having a centroid wavelength of 541 nm +/−25 nm and having a full width half maximum of at maximum 150 nm, and (iii) a third emission band () having a centroid wavelength of 614 nm +/−25 nm and having a full width half maximum of at maximum 25 nm; in the first operational mode the light generating system () is configured to control the spectral power distribution of the system light () in dependence of a radiant flux of the system light () while maintaining a correlated color temperature of the system light () within +/−10% of a predetermined correlated color temperature value; and in the first operational mode the light generating system () is configured to shift a color point () of the system light () towards a lower Dwith decreasing radiant flux of the system light () or to shift the color point () of the system light () towards a higher Dwith increasing the radiant flux of the system light ().

Light generating system

The invention provides a light generating system () configured to generate in an operational mode system light () having a spectral power distribution with at least 85% of the spectral power in emission bands () in four basic wavelength ranges of each at maximum 50 nm width, of which at least three of the four basic wavelength ranges are selected from a first wavelength range of 452 nm+/−25 nm, a second wavelength range of 504 nm+/−25 nm, a third wavelength range of 560 nm+/−25 nm, and a fourth wavelength range of 617.5 nm+/−25 nm, wherein the emission bands () have full width half maxima of at maximum 30 nm.

Tunable narrow-band light system having a high CRI across a wide CTT range

The invention provides a light indicator () for use in evaluating melanopsin active radiation in a flux of light, the light indicator () comprising a first light indicator element () comprising a first light reflective element () and a second light indicator element () comprising a second light reflective element (), the light reflecting elements () having different wavelength dependencies of the spectral reflectivity, wherein the light reflecting elements () are selected to provide the same intensity of reflected light of two or more different types of light irradiating on the light indicator elements (), wherein the two or more different types of light have different spectral power distributions in the visible wavelength range but having the same ratios of the melanopic flux and the luminous flux, wherein the ratio of the melanopic flux and the luminous flux of light is defined as wherein SPD(λ) is the spectral power distribution of the light, m(λ) is the melanopic sensitivity function, and the V(λ) is the photopic sensitivity.

Light melanopic activity indicator

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

The invention provides a light indicator () for use in evaluating a quantity of melanopsin active radiation, the light indicator () comprising a light indicator element () comprising a sensing area (), wherein the light indicator element () comprises a light reflecting element () configured to reflect at least part of light illuminating the sensing area () having one or more wavelengths selected from the wavelength range of an absorption band of melanopsin in the visible wavelength range and configured to absorb at least part of light illuminating the sensing area () having one or more wavelengths in the visible wavelength range outside the wavelength range of the absorption band of melanopsin in the visible wavelength range; and a non-sensing area () configured adjacent to the sensing area (), wherein the non-sensing area () has an achromatic color having a lightness in the range corresponding to the lightness of shades of gray.

Growing community of inventors

Landsmeer, Netherlands

Marcel Petrus Lucassen