| abstract |
The light bulb colored light emitting diode lamp according to the present invention absorbs a part of the light emitted from the semiconductor blue light emitting diode element (5) having a light emission center wavelength of 400 nm to 480 nm and a fluorescent light having a wavelength different from that of the light. And a phosphor (11) that emits. This phosphor (11) is represented by the general formula Mp (Si, Al) 12 (O, N) 16 : Eu2 + q , and the main phase has an alpha sialon structure. M is at least one of Ca, Y, Mg, Li, Sc, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sr, and 0.75 ≦ p ≦ 1.0 and 0.02 <q <0.09 are satisfied. The chromaticity range of the light from this diode lamp is the coordinates on the XYZ color system chromaticity diagram, x = 0.4775, y = 0.4283, x = 0.4594, y = 0.3971, x = 0.4348, y = 0.4185, and x = 0.4214, y = 0.38887, it falls within the light bulb color range represented by a quadrilateral that connects four points. |