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Light emitting device

  • US 7,247,257 B2
  • Filed: 03/21/2006
  • Issued: 07/24/2007
  • Est. Priority Date: 04/20/2001
  • Status: Expired due to Term
First Claim
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1. A white light emitting device comprising:

  • a light emitting element,a first fluorescent substance having a peak wavelength in a range from 575 nm to 630 nm,a second fluorescent substance capable of emitting a light in a range from blue to red, said second fluorescent substance being different from the first fluorescent substance, said second fluorescent substance being represented by (M1-a-bEuaL1b)10(PO4)6Q2 (M representing at least one kind of element selected from Mg, Ca, Ba, Sr and Zn;

    L1 representing at least one kind of element selected from Mn, Fe, Cr and Sn; and

    Q representing at least one kind of halogen element selected from F, Cl, Br and I, where 0.0001 ≦

    a≦

    0.5 and 0.0001 ≦

    b≦

    0.5).

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