LIGHTING DEVICE AND LIGHTING METHOD

摘要

A lighting device comprising first and second groups of solid state light emitters, which emit light having peak wavelength in ranges of from 430 nm to 480 nm, and first and second groups of lumiphors which emit light having dominant wavelength in the range of from 555 nm to 585 nm. In some embodiments, if current is supplied to a power line, a combination of (1) light exiting the lighting device which was emitted by the first group of emitters, and (2) light exiting the lighting device which was emitted by the first group of lumiphors would have a correlated color temperature which differs by at least 50 K from a correlated color temperature which would be emitted by a combination of (3) light exiting the lighting device which was emitted by the second group of emitters, and (4) light exiting the lighting device which was emitted by the second group of lumiphors.

主权项

1. A lighting device comprising:
a first group of solid state light emitters; a first group of lumiphors; a second group of solid state light emitters; a second group of lumiphors; and a third group of solid state light emitters; wherein:
each of said first group of solid state light emitters and each of said second group of solid state light emitters, if illuminated, would emit light having a peak wavelength in the range of from 430 nm to 480 nm;each of said first group of lumiphors and each of said second group of lumiphors, if excited, would emit light having a dominant wavelength in the range of from about 555 nm to about 585 nm; andif each of said first group of solid state light emitters is illuminated and each of said first group of lumiphors is excited, a mixture of light emitted from said first group of solid state light emitters and said first group of lumiphors would, in the absence of any additional light, have a first group mixed illumination corresponding to a first point on a 1931 CIE Chromaticity Diagram, said first point having a first correlated color temperature;if each of said second group of solid state light emitters is illuminated and each of said second group of lumiphors is excited, a mixture of light emitted from said second group of solid state light emitters and said second group of lumiphors would, in the absence of any additional light, have a second group mixed illumination corresponding to a second point on a 1931 CIE Chromaticity Diagram, said second point has a second correlated color temperature, said first correlated color temperature differs from said second correlated color temperature by at least 50 K; andeach of said third group of solid state light emitters, if illuminated, would emit light having a dominant wavelength in the range of from 600 nm to 630 nm.