Blue-green phosphor for fluorescent lighting applications

Details Blue-green phosphor for fluorescent lighting applications Blue-green phosphor for fluorescent lighting applications

2005-03-15

2005-03-15

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C313S485000, C313S486000, C252S30140R

Reexamination Certificate

active

06867536

ABSTRACT:
A fluorescent lamp including a phosphor layer including Sr4Al14O25:Eu2+(SAE) and at least one of each of a red, green and blue emitting phosphor. The phosphor layer can optionally include an additional, deep red phosphor and a yellow emitting phosphor. The resulting lamp will exhibit a white light having a color rendering index of 90 or higher with a correlated color temperature of from 2500 to 10000 Kelvin. The use of SAE in phosphor blends of lamps results in high CRI light sources with increased stability and acceptable lumen maintenance over, the course of the lamp life.

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