Fluorescent lamp having reflective layer

Details Fluorescent lamp having reflective layer Fluorescent lamp having reflective layer

1980-09-08

1982-12-14

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313488, H01J 6144, H01J 6148

Patent

active

043639976

ABSTRACT:
The present invention relates to a fluorescent lamp of the reflective layer type comprising a first phosphor layer and a second phosphor layer laminated partially on the first phosphor layer. The first phosphor layer is formed on the entire face in the circumferential direction of the inner wall of a glass tube, and the second phosphor layer is formed on the first phosphor layer at a certain coating angle along the axial direction of the glass tube. The average particle size of the phosphor constituting the first phosphor layer is different from the average particle size of the phosphor constituting the second phosphor layer. In the fluorescent lamp of the reflective layer type having this structure, a high illuminance can be obtained.

REFERENCES:
patent: 2135732 (1938-11-01), Randall et al.
patent: 2854600 (1958-09-01), Van De Weijer et al.
patent: 3225241 (1965-12-01), Spencer et al.
patent: 3275872 (1966-09-01), Chernin et al.
patent: 3409792 (1968-11-01), Martyny et al.
patent: 3886396 (1975-05-01), Hammer et al.

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