Cool-white fluorescent lamp with phosphor having modified spectr

Details Cool-white fluorescent lamp with phosphor having modified spectr Cool-white fluorescent lamp with phosphor having modified spectr

1976-06-14

1978-02-21

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

2523014P, H01J 6144, C09K 1112, C09K 1124, C09K 1142

Patent

active

040755320

ABSTRACT:
An improved cool-white fluorescent lamp utilizes a particular two-component phosphor combination exhibiting a narrow "blue" emission spectrum and a broad "yellow" emission spectrum to achieve improved luminous efficacy. In one preferred embodiment, the combination is a blended mixture of europium activated strontium chlorapatite with manganese and antimony coactivated calcium fluorapatite phosphors.

REFERENCES:
patent: 2030402 (1936-02-01), Ruttenauer
patent: 3630947 (1971-12-01), Brixner
patent: 3670194 (1972-06-01), Thornton, Jr. et al.
patent: 3748517 (1973-07-01), Haft
patent: 3764555 (1973-10-01), Vincent et al.

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