Electrodeless fluorescent lamp

Details Electrodeless fluorescent lamp Electrodeless fluorescent lamp

H - Electricity

01

J

H01J 65/04 (2006.01) H01J 61/24 (2006.01) H01J 61/54 (2006.01)

Patent

CA 2188079

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 piece 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 C including phosphor.

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