EP 0159741 A1 19851030 - High-pressure sodium vapour discharge lamp.
Title (en)
High-pressure sodium vapour discharge lamp.
Title (de)
Hochdrucknatriumdampfentladungslampe.
Title (fr)
Lampe à décharge à vapeur de sodium à haute pression.
Publication
Application
Priority
NL 8400966 A 19840328
Abstract (en)
In a high-pressure sodium vapour discharge lamp according to the invention, an emitter (19) is used which comprises strontium yttrate. It has been found that the lamp has a comparatively long life. This becomes clearly manifest in a low-power lamp which during operation emits <<white>> light.
IPC 1-7
IPC 8 full level
H01J 61/06 (2006.01); H01J 61/073 (2006.01)
CPC (source: EP)
H01J 61/073 (2013.01); H01J 61/0737 (2013.01)
Citation (search report)
- [X] DE 2951741 A1 19800703 - MITSUBISHI ELECTRIC CORP
- [AD] GB 2051470 A 19810114 - PHILIPS NV
- [A] FR 2316725 A1 19770128 - PHILIPS NV [NL]
- [X] PATENTS ABSTRACTS OF JAPAN, vol. 5, no. 141 (E-73)(813), September 5, 1981, page 145 E 73; & JP - A - 56 78057 (MITSUBISHI DENKI K.K.) 26-06-1981
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0159741 A1 19851030; HU 189968 B 19860828; HU T37295 A 19851128; JP S60218756 A 19851101
DOCDB simple family (application)
EP 85200448 A 19850325; HU 112685 A 19850325; JP 5968385 A 19850326