×

Light emitting device using orange-red phosphor with co-dopants

  • US 8,324,798 B2
  • Filed: 03/16/2011
  • Issued: 12/04/2012
  • Est. Priority Date: 03/19/2010
  • Status: Expired due to Fees
First Claim
Patent Images

1. A lighting apparatus comprising:

  • a light source configured to emit radiation having a wavelength of peak emission between about 360 nm and about 500 nm;

    a first phosphor configured to receive at least a portion of the radiation emitted by the light source, wherein the first phosphor has a first wavelength of peak emission between about 495 nm and about 600 nm; and

    a second phosphor configured to receive at least a portion of the radiation emitted by the light source, wherein the second phosphor is represented by the formula RE2-x-yCaMg2Si3O12;

    Cex,Ay, wherein;

    RE is a rare earth metal element selected from the group consisting of Lu, Y, Sc and Tb;

    A is a co-dopant selected from the group consisting of Pr, Cr, Mn and Tb;

    x is greater than 0 and less than about 1.0; and

    y is greater than 0 and less than about 0.2.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×