Blue-emitting phosphor for use in fluorescent lamps and fluoresc

Details Blue-emitting phosphor for use in fluorescent lamps and fluoresc Blue-emitting phosphor for use in fluorescent lamps and fluoresc

1993-06-11

1994-09-27

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014R, C09K 1180, H01J 163

Patent

active

053509714

ABSTRACT:
A blue-emitting phosphor of europium-activated barium magnesium aluminate is used in a high color rendering three-band type fluorescent lamp, in which the particle size distribution is uniform to obtain excellent phosphor layer. A fluorescent lamp employing the blue-emitting phosphor mixed with red and green-emitting phosphors has a uniform emission luminance distribution and increased luminous flux intensity. The employed blue phosphor is expressed:

REFERENCES:
patent: 4837481 (1989-06-01), Verstegen et al.

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