| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light-emitting device having high efficiency and high color rendering properties (particularly corresponding to the color rendition AAA) by using a specific phosphor emitting light in high efficiency by light in a range of 430-480 nm or light in a range of 380-430 nm from a semiconductor light-emitting agent. <P>SOLUTION: The light-emitting device is equipped with a light-emitting element for emitting primary light and a wavelength-converting portion for absorbing a part of the primary light and emitting secondary light having wavelength having a length not shorter than wavelength of primary light. The wavelength-converting portion comprises a plurality of green-based light-emitting phosphors and red-based light-emitting phosphors and each green-based light emitting phosphor comprises at least one kind of phosphor selected from a specific europium (II)-activated silicate phosphor (A-1) and a specific cerium (III)-activated silicate phosphor (A-2) and the each red-based light-emitting phosphor comprises a specific europium (II)-activated nitride phosphor (B). <P>COPYRIGHT: (C)2007,JPO&INPIT |
