Global Patent Index - EP 1550146 A2

EP 1550146 A2 20050706 - LOW-PRESSURE MERCURY VAPOR DISCHARGE LAMP

Title (en)

LOW-PRESSURE MERCURY VAPOR DISCHARGE LAMP

Title (de)

NIEDERDRUCK-QUECKSILBERDAMPF-ENTLADUNGSLAMPE

Title (fr)

LAMPE A DECHARGE A VAPEUR DE MERCURE BASSE PRESSION

Publication

EP 1550146 A2 20050706 (EN)

Application

EP 03712541 A 20030409

Priority

  • EP 03712541 A 20030409
  • EP 02076442 A 20020411
  • EP 02077718 A 20020708
  • IB 0301433 W 20030409

Abstract (en)

[origin: WO03085695A2] 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 (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 diameterDin and the length of the discharge vessel Ldv is given by the relation: wherein C ( 0.01 (g/mm2. Preferably, 0.0005 ( C ( 0.005 (g/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.

IPC 1-7

H01J 61/20; H01J 61/72; H01J 61/35; C03C 3/076; C03C 4/20

IPC 8 full level

H01J 61/20 (2006.01); C03C 3/076 (2006.01); C03C 4/20 (2006.01); H01J 61/00 (2006.01); H01J 61/10 (2006.01); H01J 61/30 (2006.01); H01J 61/35 (2006.01); H01J 61/72 (2006.01); H01J 65/04 (2006.01)

CPC (source: EP)

C03C 3/076 (2013.01); C03C 3/085 (2013.01); C03C 3/087 (2013.01); H01J 61/302 (2013.01); H01J 61/35 (2013.01); H01J 61/72 (2013.01); H01J 65/048 (2013.01)

Citation (search report)

See references of WO 03085695A2

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 03085695 A2 20031016; WO 03085695 A3 20050506; AU 2003216631 A1 20031020; AU 2003216631 A8 20031020; EP 1550146 A2 20050706; JP 2005526358 A 20050902; JP 4494800 B2 20100630

DOCDB simple family (application)

IB 0301433 W 20030409; AU 2003216631 A 20030409; EP 03712541 A 20030409; JP 2003582787 A 20030409