Phosphor particle, fluorescent lamp, and manufacturing method

Details Phosphor particle, fluorescent lamp, and manufacturing method Phosphor particle, fluorescent lamp, and manufacturing method

1985-04-03

1987-12-01

Levy, Stewart J.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

427 67, H01J 170, H01J 6135

Patent

active

047106743

ABSTRACT:
A phosphor particle having a non-particulate, conformal aluminum oxide coating and a fluorescent lamp incorporating aluminum oxide coated phosphor particles are disclosed. A method for improving the lumen maintenance of a fluorescent lamp is also disclosed. The method involves applying a non-particulate, conformal aluminum oxide coating to the outer surface of individual particles of a finely-divided fluorescent lamp phosphor, applying the coated phosphor particles to a fluorescent lamp envelope, and processing the phosphor coated envelope into a finished lamp.

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