Non-melatonin suppressing light source with a cri that approaches that of white light
AssigneePhilips Lighting Holding B.V.
InventorsVANJA HOMMES, LUCAS JOSEF MARIA SCHLANGEN, MARINA CECILIA GIMENEZ, DEBRA JEAN SKENE, VICTORIA LOUISE REVELL
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Abstract
The invention provides a lighting unit configured to generate white light wherein the white light has a spectral intensity in the visible wherein at least 40% of all photons in the wavelength range of 400-500 nm are found in the wavelength range of 430-445 nm (see also FIG. 1b). The lighting unit may especially be used for increasing alertness of a human while not or minimally suppressing melatonin production of the human.
Claims15
A lighting unit comprising at least one solid state light source, the lighting unit configured to generate white light wherein the white light has a spectral intensity in the visible wherein at least 40% of all photons in the wavelength range of 400-500 nm are found in the wavelength range of 430-445 nm, and wherein the white light has a ratio of the total number of photons in the wavelength range of 445-490 nm to the total number of photons wavelength range of 430-445 nm of at maximum 0.75.
Dependencies are inferred from the claim text.