EP 0674339 A3 19970423 - Electrodeless low-pressure mercury vapour discharge lamp.
Title (en)
Electrodeless low-pressure mercury vapour discharge lamp.
Title (de)
Elektrodenlose Niederdruckqueckribberdampfentladungslampe.
Title (fr)
Lampe à décharge dans la vapeur de mercure à basse pression sans électrode.
Publication
Application
Priority
- EP 95200649 A 19950317
- EP 94200806 A 19940325
Abstract (en)
[origin: EP0674339A2] An electrodeless low-pressure mercury vapor discharge lamp of the invention comprises a discharge vessel (1) that gas-tightly encloses a discharge-space (2) that is provided with a fill of mercury and a noble gas. The discharge vessel (1) has a light-transmitting enveloping part (3A) and further has a sunken part (3B) in which a coil (10) for generating a high-frequency magnetic field is arranged. At least a portion (5B) of a surface (4) of the discharge vessel (1) turned towards the discharge space (2) is provided with a luminescent layer (5A, 5B). At least a portion of the luminescent layer (5B) bears a protective layer (6B) of aluminum oxide particles with a covering weight of 10 to 500 mu g/cm<2>. The protective layer provides for a lower mercury consumption and/or a reduction in the change of colour point during lamp life. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 61/35 (2006.01); H01J 61/42 (2006.01); H01J 61/46 (2006.01); H01J 65/04 (2006.01)
CPC (source: EP)
H01J 61/35 (2013.01); H01J 61/42 (2013.01); H01J 61/46 (2013.01); H01J 65/048 (2013.01)
Citation (search report)
- [YD] EP 0162504 A1 19851127 - PHILIPS NV [NL]
- [YD] GB 2091936 A 19820804 - GTE PROD CORP
- [Y] US 3886396 A 19750527 - HAMMER EDWARD E, et al
- [A] EP 0507533 A2 19921007 - TOSHIBA LIGHTING & TECHNOLOGY [JP]
- [A] US 5270615 A 19931214 - CHANG HSUEH-RONG [US]
- [A] US 4607191 A 19860819 - FLAHERTY JOHN M [US]
- [A] US 3995191 A 19761130 - KADUK EDWARD E, et al
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 95200649 A 19950317