Title:
LOW-PRESSURE MERCURY VAPOR DISCHARGE LAMP
Document Type and Number:
WIPO Patent Application WO2003085695
Kind Code:
A3
Abstract:
Low-pressure mercury vapor discharge lamp has an at least partly substantially cylindrical discharge vessel (10) with a length Ldv and with an internal diameter Din. The discharge vessel (10) encloses, in a gastight manner, a discharge space (13) provided with a inert gas mixture and with mercury. The discharge vessel (10) comprises discharge means (preferably electrodes, 20a; 20b) for maintaining a discharge in the discharge space (13). According to the invention, the ratio of the weight of mercury mHg in the discharge vessel (10) to the product of the internal diameter Din and the length of the discharge vessel Ldv is given by the relation: wherein C <= 0.01 µg/mm2. Preferably, 0.0005 <= C <= 0.005 µg/mm2. Preferably, the discharge vessel (10) contains less than 0.1 mg mercury. The discharge lamp according to the invention operates under unsaturated mercury conditions.
Inventors:
VAN DER POL ADRIANUS J H P (NL)
GEERDINCK LEONIE M (NL)
VOSSEN ENGELBERTUS C P M (NL)
SNIJKERS-HENDRICKX INGRID J M (BE)
BLASIG ROLAND (DE)
KRIJNEN SIMON (NL)
VAN DEN BAKEL RONALD A (NL)
GEERDINCK LEONIE M (NL)
VOSSEN ENGELBERTUS C P M (NL)
SNIJKERS-HENDRICKX INGRID J M (BE)
BLASIG ROLAND (DE)
KRIJNEN SIMON (NL)
VAN DEN BAKEL RONALD A (NL)
Application Number:
PCT/IB2003/001433
Publication Date:
May 06, 2005
Filing Date:
April 09, 2003
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
VAN DER POL ADRIANUS J H P (NL)
GEERDINCK LEONIE M (NL)
VOSSEN ENGELBERTUS C P M (NL)
SNIJKERS-HENDRICKX INGRID J M (BE)
BLASIG ROLAND (DE)
KRIJNEN SIMON (NL)
VAN DEN BAKEL RONALD A (NL)
VAN DER POL ADRIANUS J H P (NL)
GEERDINCK LEONIE M (NL)
VOSSEN ENGELBERTUS C P M (NL)
SNIJKERS-HENDRICKX INGRID J M (BE)
BLASIG ROLAND (DE)
KRIJNEN SIMON (NL)
VAN DEN BAKEL RONALD A (NL)
International Classes:
H01J61/20; C03C3/076; C03C4/20; H01J61/00; H01J61/10; H01J61/30; H01J61/35; H01J61/72; H01J65/04; (IPC1-7): H01J61/20; C03C3/076; C03C4/20; H01J61/35; H01J61/72
Domestic Patent References:
| WO2001067486A1 | 2001-09-13 | |||
| WO2001071770A1 | 2001-09-27 |
Foreign References:
| GB667070A | 1952-02-27 | |||
| US2419902A | 1947-04-29 | |||
| US2965789A | 1960-12-20 | |||
| US2973447A | 1961-02-28 | |||
| US2916645A | 1959-12-08 | |||
| US2915664A | 1959-12-01 | |||
| US3013169A | 1961-12-12 | |||
| GB857711A | 1961-01-04 | |||
| US2671184A | 1954-03-02 | |||
| US3526804A | 1970-09-01 | |||
| US2714681A | 1955-08-02 | |||
| US6362570B1 | 2002-03-26 |
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