White phosphor, and white light-emitting equipment or device

Details White phosphor, and white light-emitting equipment or device White phosphor, and white light-emitting equipment or device

2007-05-17

2010-02-09

Roy, Sikha (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C313S485000, C313S487000, C313S501000, C313S503000, C313S512000, C252S30140F, C257S099000, C257S100000

Reexamination Certificate

active

07659658

ABSTRACT:
A white phosphor is provided, which is a white phosphor comprising a single material, wherein the light-emitting center is one element other than Mn, and emitting white light having excellent color rendering properties by near ultraviolet excitation. The white phosphor is represented by the formula SraSbMgcZndSieOf:Eu2+(with the proviso that when e=1, 0<(c+d)/(a+c+d)≦0.2, 1.8≦a+c+d≦2.2, 0≦b/(b+f)≦0.07 and 3.0≦b+f≦4.4), among which, as one preferred example, the white phosphor is represented by the composition formula (SrO1-αSα)x.(Mg1-βZnβO)y.(SiO2)z:Eu2+(in the formula, 4.5≦x/y≦27.5, 3≦z/y≦14.5, 0≦α≦0.3 and 0≦β≦0.7) is proposed.

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Sun, Xiao-yuan et al., “A Single White Phosphor Suitable for New Ultraviolet Excitation Applied to New Generation White LED Lighting”, Chinese Juornal of Luminescence (Jun. 2005), vol. 26, No. 3, pp. 404-406 (English Abstract appears at end of article).

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