High-pressure discharge lamp

(19)

(11)

EP 2 105 946 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	08.02.2012 Bulletin 2012/06

(43)	Date of publication A2:
	30.09.2009 Bulletin 2009/40

(21)	Application number: 09004063.5

(22)	Date of filing: 20.03.2009

(51)

International Patent Classification (IPC):

H01J 61/073^(2006.01)

H01J 61/12^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA RS

(30)

Priority:

26.03.2008 JP 2008081083

(71)	Applicant: Harison Toshiba Lighting Corporation
	Imabari-shi, Ehime 794-0042 (JP)

(72)	Inventors:
	Tauchi, Akihito Imabari-shi Ehime 794-0042 (JP) Fujioka, Atsushi Imabari-shi Ehime 794-0042 (JP) Ichimura, Chikako Imabari-shi Ehime 794-0042 (JP)

(74)	Representative: Schmidtchen, Jürgen Christian
	Kramer - Barske - Schmidtchen Landsberger Strasse 300 80687 München 80687 München (DE)

(54)	High-pressure discharge lamp

(57) A high-pressure discharge lamp includes, at both ends of a hermetic vessel that is made of a UV transmissive material and has at least a rare gas sealed therein, two discharge electrodes provided such that each discharge electrode includes one end. In at least one of two discharge electrodes, an emitter material of oxides of at least one kind or more of rare earth elements in a concentration from 0.5 to 5.0vol% expressed in terms of the quantity of metal simple substances of the rare earth elements is contained in an electrode member using tungsten as a base material.

Search report