Fluorescent lamp with internal glass tube

Details Fluorescent lamp with internal glass tube Fluorescent lamp with internal glass tube

1997-09-19

2000-01-25

Day, Michael H.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313491, 313234, 313607, H01J 6104

Patent

active

060182180

ABSTRACT:
A fluorescent lamp (1) includes a tubular glass bulb (2), an internal electrode (5) within the tubular glass bulb (2), a fluorescent layer (4) formed on an inner surface of the glass bulb (2), an external electrode (3) provided on an outer surface of the glass bulb (2), and a covering glass tube (6) is disposed over the total length of the internal electrode (5). The fluorescent lamp (1) further includes a fluorescent layer (7) disposed on the outer surface of the glass tube (6). The fluorescent lamp (1), as configured above, makes it unnecessary to form the internal electrode into a coil, and absorbs the difference in thermal expansion coefficients. This prevents the internal electrode (5) from resonating with vibrations from the outside and prevents contact of the fluorescent layer (4) by the internal electrode (5).

REFERENCES:
patent: 2457503 (1948-12-01), Singer
patent: 4983881 (1991-01-01), Eliasson et al.
patent: 5013959 (1991-05-01), Kogelschatz
patent: 5173638 (1992-12-01), Eliasson et al.
patent: 5444331 (1995-08-01), Matsuno et al.
patent: 5648700 (1997-07-01), Chu et al.

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