Fluorescent lamp with UV suppressing film and its manufacturing

Details Fluorescent lamp with UV suppressing film and its manufacturing Fluorescent lamp with UV suppressing film and its manufacturing

1991-03-29

1993-07-13

Yusko, Donald J.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313635, 313493, 427 67, 428213, H01J 170, H01J 6135, H01J 922

Patent

active

052276937

ABSTRACT:
A fluorescent lamp including, a bulb having an outer surface and an inner surface, discharge gas contained in the bulb and generating ultraviolet rays by a discharge thereof, a pair of electrodes provided to the bulb for generating the discharge, a phosphor film formed on the inner surface of the bulb and having a non-uniform thickness thereof, and an ultraviolet suppressing film for suppressing the ultraviolet rays formed to be faced with the phosphor film, characterized in that the ultraviolet suppressing film has non-uniform ability for suppressing ultraviolet rays penetrating the phosphor film in accordance with portions thereof to decrease the difference in the intensity of the ultraviolet rays emitted from the ultraviolet suppressing film.

REFERENCES:
patent: 2386277 (1945-10-01), Smith
patent: 2774903 (1956-12-01), Burns
patent: 3205394 (1965-09-01), Ray
patent: 4289991 (1981-09-01), Schreurs

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