Lighting device and lighting method

摘要

A lighting device comprising first and second groups of solid state light emitters, which emit light having wavelength in ranges of from 430 nm to 480 nm and from 600 nm to 630 nm, respectively, and a first group of lumiphors which emit light having dominant wavelength in the range of from 555 nm to 585 nm. 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, in an absence of any additional light, produce a sub-mixture of light having x, y color coordinates within an area on a 1931 CIE Chromaticity Diagram defined by points having coordinates (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), (0.36, 0.38). Also provided is a method of lighting.

主权项

1. A lighting device comprising:
a first group of solid state light emitters, said first group of solid state light emitters comprising at least one solid state light emitter; at least a first luminescent material; a second group of solid state light emitters, said second group of solid state light emitters comprising at least one solid state light emitter, said second group of solid state light emitters emitting light of a wavelength that differs from a wavelength of light emitted by said first group of solid state light emitters, said lighting device comprises at least a first set of parallel strings, said first set of parallel strings comprising at least said first string and a second string, at least one of the first group of solid state light emitters on said first string, at least one of the second group of solid state light emitters on the first string, a number of the first group solid state light emitters on the first string differing from a number of the second group of solid state light emitters on the first string, a first ratio differs from a second ratio,
said first ratio equal to (1) a number of solid state light emitters in said second group of solid state light emitters and in said first string, divided by (2) a number of solid state light emitters in said first group of solid state light emitters and in said first string;said second ratio equal to (3) a number of solid state light emitters in said second group of solid state light emitters and in said second string, divided by (4) a number of solid state light emitters in said first group of solid state light emitters and in said second string.