Electrodeless discharge lamp

Details Electrodeless discharge lamp Electrodeless discharge lamp

2006-08-01

2006-08-01

Chen, Shih-Chao (Department: 2821)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

Reexamination Certificate

active

07084562

ABSTRACT:
An electrodeless discharge lamp is disclosed that comprises a bulb with a substance for electric discharge sealed therein, the bulb having a reentrant portion protruding inwardly along a Z-axis direction; an induction coil arranged in the reentrant portion, the induction coil having a magnetic core and a winding wound around the magnetic core; and a drive circuit for supplying the induction coil with a power from 50 kHz to 1 MHz. The bulb has an outer diameter from 65 mm to 75 mm in a direction orthogonal to the Z-axis direction, and the magnetic core has a length L in the Z-axis direction that is 1.05 times or more a length L′ of the winding in the Z-axis direction, the length L being set to 41 mm or less.

REFERENCES:
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patent: 5461284 (1995-10-01), Roberts et al.
patent: 5539283 (1996-07-01), Piejak et al.
patent: 5668433 (1997-09-01), Everest et al.
patent: 5798618 (1998-08-01), van Os et al.
patent: 6650068 (2003-11-01), Kurachi et al.
patent: 6653783 (2003-11-01), Kawasaki et al.
patent: 6768254 (2004-07-01), Kawasaki et al.

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