Colored electric lamp with a colored pigment-containing coating

US6841937B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Joachim Opitz · Aachen, DE
• Sonja Louisa Leona Ceulemans · Weert, NL

Key dates

• Filing date: May 24, 2001
• Grant date: Jan 11, 2005
• Expiry date: Aug 26, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2217/485
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An electric lamp which is provided with an electric light source in a light-transmitting bulb provided with a coating comprising an inorganic colored pigment selected from the group formed by oxide nitride pigments of the general formulaA1−xA′xBO2−xN1+x, wherein A=Mg, Ca, Sr, Ba, Zn, A′=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo, W and B′=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<x<1or an oxide-nitride pigment of the general formulaAB1−xB′xBO1+xN2−x, wherein A=Mg, Ca, Sr, Ba, Zn, A′=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo W and B′=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<x<1or an oxide-nitride pigment of the general formulaAyA′2−yB2O5+yN2−y, wherein A=Mg, Ca, Sr, Ba, Zn, A′=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo, W and B′=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<y<2or an oxide-nitride pigment of the general formulaA′2B2−yB′yO5+yN2−y, wherein A=Mg, Ca, Sr, Ba, Zn, A′=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo, W and B′=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<y<2or an oxide-nitride pigment of the general formulaCD2−mD′mO4−mNm, wherein C=Mg, Ca, Mn, Fe, Co, Ni, Zn and D=Al, Ga, In, Ti, V, Cr, Fe, Co, Ni and D′=Ti, Zr, HF, Sn, Ge, Si, Nb, Ta, and 0<m<2or an oxide-nitride pigment of the general formulaC1−nC′nD2O4−nNn, wherein C=Mg, Ca, Mn…