| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light emitting device causing little reduction in brightness of a white color and little fluctuation in chromaticity and having excellent color reproducibility (an NTSC rate) even if a tetravalent manganese-activated fluorinated tetravalent metal salt phosphor is used. <P>SOLUTION: The phosphor preparation, which includes at least a tetravalent manganese-activated fluorinated tetravalent metal salt red light emitting phosphor substantially represented by MI<SB>2</SB>(MII<SB>1-a</SB>Mn<SB>a</SB>)F<SB>6</SB>in a silicone resin, is prepared with viscosity by which the phosphor does not precipitate in the silicone resin and its dispersion state is maintained. The light emitting device has a light emitting element emitting primary light, and a wavelength conversion part absorbing a part of the primary light emitted from the light emitting element and emitting secondary light with a wavelength longer than that of the primary light. The wavelength conversion part is formed by using the phosphor preparation. <P>COPYRIGHT: (C)2010,JPO&INPIT |
