| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide lighting having more efficiency, longer life span and more proper color reproductivity. <P>SOLUTION: A lighting device comprises first and second groups of solid state light emitters, which emit light having peak wavelengths from 430 nm to 480 nm and from 600 nm to 630 nm, respectively, and a first group of lumiphores emit light having dominant wavelength from 555 nm to 585 nm. 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 lumiphores 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). <P>COPYRIGHT: (C)2013,JPO&INPIT |
