External electrode fluorescent lamp and manufacturing method...

Details External electrode fluorescent lamp and manufacturing method... External electrode fluorescent lamp and manufacturing method...

2005-06-22

2008-05-20

Gushi, Ross (Department: 2833)

Illumination

Light source and modifier

Fluorescent type

C313S607000

Reexamination Certificate

active

07374314

ABSTRACT:
An external electrode fluorescent lamp includes an external electrode having an increased surface area. The external electrode fluorescent lamp includes a lamp tube, the lamp tube including a “W”-like shaped end portion, and a double-tube external electrode formed on an outer surface of the “W”-like shaped end portion, the double-tube external electrode including a first electrode on a concave outer surface of the “W”-like shaped end portion, and a second electrode formed on a non-concave outer surface of the “W”-like shaped end portion. Alternatively, the external electrode fluorescent lamp includes a lamp tube, the lamp tube having two end portions and an intermediate portion between the end portions and a diameter of the end portions being larger than a diameter of the intermediate portion, and external electrodes respectively formed on an outer surface of the end portions of the lamp tube.

REFERENCES:
patent: 5013966 (1991-05-01), Saikatsu et al.
patent: 6922016 (2005-07-01), Yoo et al.
patent: 2004/0135484 (2004-07-01), Lim
patent: 1 426 778 (2004-06-01), None
patent: 1426778 (2004-06-01), None
patent: 10-2001-0074027 (2001-08-01), None
patent: 10-2004-0052887 (2004-06-01), None

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