| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light emitting apparatus capable of improving the luminance thereof by preventing the repetition of wavelength conversion between different phosphors in a wavelength converting unit. <P>SOLUTION: This light emitting apparatus 1 comprises a light emitting device 2 and the wavelength converting unit 20 for converting the wavelength of the light from this light emitting device 2 by two or more kinds of phosphors. The wavelength converting unit 20 consists of a plurality of phosphor layers laminated in the travelling direction of the light from the light emitting device 2. When the spectrum of the light emitted by one phosphor from among the phosphors contained in the wavelength converting unit 20 overlaps with the excitation spectrum of the other phosphor, these phosphors are made to be contained in different phosphor layers respectively, and the phosphor layer containing the phosphor having the longer wavelength of the emitted light is made to be provided nearer to the light emitting device 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
