Electrodeless fluorescent lamp having a reduced run-up time

Details Electrodeless fluorescent lamp having a reduced run-up time Electrodeless fluorescent lamp having a reduced run-up time

1996-10-17

1998-06-16

O'Shea, Sandra L.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313490, 313492, H01J 6500, H01J 6504

Patent

active

057676178

ABSTRACT:
An electrodeless fluorescent lamp comprises a discharge vessel (10) having a re-entrant portion (11) for housing a solenoid (12) for initiating a discharge in the vessel by means of an RF electromagnetic field. A primary amalgam (18) for releasing mercury vapor is placed at the tip of an exhaust tube (17) where the primary amalgam can be maintained at a suitable temperature for controlling the mercury vapor pressure. The primary amalgam does not provide rapid run-up of light output. To provide rapid run-up of light output a pied of indium (20,30) is placed on the re-entrant at a position where it is rapidly heated by the discharge. The indium may be coated with the layers of a coating including phosphor.

REFERENCES:
patent: 4262231 (1981-04-01), Anderson et al.
patent: 4622495 (1986-11-01), Smeelen
patent: 5258689 (1993-11-01), Jansma et al.
patent: 5412280 (1995-05-01), Scott et al.
patent: 5412288 (1995-05-01), Borowiec et al.
patent: 5629584 (1997-05-01), Borowiec et al.

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