| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light-emitting device having a high color rendering, having a high luminous efficiency, also having a small deviation from a black-body locus, and being at a low color temperature of 5,000 K or lower, in the light-emitting device using a white LED package. <P>SOLUTION: The light-emitting device 100 is equipped with: a blue LED 112 using a first blue wavelength as a dominant wavelength; the white LED package 110 consisting of a phosphor being excited by the blue LED light and emitting light using a second wavelength longer than the first blue wavelength as the dominant wavelength; a red LED package 120 emitting the light using a third red wavelength longer than the second wavelength as the dominant wavelength; and a wavelength changing sheet 150 including at least either of the phosphor 153 being excited by first LED light and emitting the light while using a fourth wavelength having a peak between the first wavelength and the second wavelength as the dominant wavelength or a red phosphor 154 being excited by the first LED light and emitting the light while using a fifth wavelength having a broad peak between the second wavelength and the third wavelength as the dominant wavelength. <P>COPYRIGHT: (C)2011,JPO&INPIT |
