| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light emitting device that prevents fluorescence emitted from each phosphor in a color conversion plate containing a plurality of types of phosphors from being easily absorbed by other phosphors, allows light from a light-emitting element to reach each of the phosphors efficiently, and reduces the chromaticity unevenness. <P>SOLUTION: The color conversion plate 5 has a sea-island structure including a sea region 21 and an island region 22, and the island region 22 passes through the color conversion plate in a thickness direction and is partially exposed from upper and lower surfaces of the color conversion plate. The island region 22 contains the first phosphor, while the sea region 21 contains the second phosphor. The fluorescent wavelength of the first phosphor is longer than that of the second phosphor. Since the first phosphor having a longer wavelength has an island sea-island structure, unevenness in chromaticity is hard to occur and two-color phosphorescence can be emitted directly from an upper portion. <P>COPYRIGHT: (C)2010,JPO&INPIT |
