Patent ID: 8044572

Claim:
A light emitting device comprising: a light emitting element for emitting a first light, a first layer of a ceramic composite which comprises a solidified body having formed therein an α-Al 2 O 3 phase and a Ce-activated Y 3 Al 5 O 12 (YAG:Ce) or Tb-activated T 3 Al 5 O 12 (YAG:Tb) phase continuously and three-dimensionally entangled with each other, in which said YAG:Ce or YAG:Tb phase emits a fluorescence and said α-Al 2 O 3 phase does not emit a fluorescence and transmits said first light, whereby said first layer absorbs a part of said first light to emit a second light and transmits a part of said first light, and a second layer of a ceramic composite formed on the surface of said first layer for controlling color tone, wherein said ceramic composite of said second layer comprises a solidified body having formed therein a Cr-doped α-Al 2 O 3 phase and a Y 3 Al 5 O 12 (YAG) phase continuously and three-dimensionally entangled with each other, whereby said second layer absorbs a part of said first light and/or a part of said second light, emits a third light and transmits a part of said first light and/or a part of said second light, wherein said light emitting device emits said first, second and third lights outward to obtain a desired white color tone light.