×

FLUORESCENT MATERIAL AND LIGHT-EMITTING DEVICE

  • US 20090096370A1
  • Filed: 12/19/2008
  • Published: 04/16/2009
  • Est. Priority Date: 10/28/2003
  • Status: Active Grant
First Claim
Patent Images

1. A lamp comprising a light-emitting body that converts electric energy into light energy and a translucent glass covering the light-emitting body, wherein a phosphor layer is provided on at least the inner or outer surface of the translucent glass, and the phosphor layer comprises a fluorescent material including a first phosphor that at least partially converts energy emitted by an excitation source, which emits ultraviolet having a wavelength of about 365 nm, to a first emission spectrum that is different from the energy, and a second phosphor that at least partially converts the first emission spectrum to a second emission spectrum that is different from the first emission spectrum,the first phosphor being a light-storing phosphor,wherein the second phosphor is at least one type selected from the group consisting of(YzGd1-z)3Al5O12:

  • Ce, wherein z is a number that satisfies 0<

    z≦

    1, and(A1-aSma)3A′

    5O12;

    Ce, wherein A is at least one type selected from the group consisting of Y, Lu, Sc, La, Gd, Pr and Tb, A′

    is at least one type selected from the group consisting of Al, Ga and In, and a is a number that satisfies 0≦

    a<

    1, anda peak wavelength of the emission spectrum of the first phosphor and a peak wavelength of the emission spectrum of the second phosphor have a relation of complementary colors so that when the light created due to the peak wavelength of the first phosphor and the light created due to the peak wavelength of the second phosphor are mixed, the resulting light is in the white region.

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