Title (en)

LIGHTING DISCHARGE LAMP

Publication

EP 0377899 A3 19910515 (EN)

Application

EP 89124095 A 19891228

Priority

JP 367089 A 19890112

Abstract (en)

[origin: EP0377899A2] A lighting discharge lamp includes a light-emitting tube in which a halogen and lutetium are sealed together with mercury and a rare gas. The sealed amount of lutetium falls in a range of from 2 x 10<-><7> mol/cc to 2 x 10<-><5> mol/cc. The premature clouding of the light-emitting tube can be avoided to enhance its luminous flux utilization and the variations of its color temperature depending on those of supply power for operation can be reduced to a small extent.

IPC 1-7

H01J 61/12; H01J 61/86

IPC 8 full level

H01J 61/20 (2006.01); H01J 61/12 (2006.01); H01J 61/86 (2006.01)

CPC (source: EP)

H01J 61/12 (2013.01); H01J 61/86 (2013.01)

Citation (search report)

• [X] EP 0049545 A1 19820414 - PHILIPS NV [NL]
• [X] US 3842307 A 19741015 - DOBRUSSKIN A, et al
• [A] GB 2053562 A 19810204 - NARVA VEB
• [E] EP 0389907 A2 19901003 - USHIO ELECTRIC INC [JP]

Designated contracting state (EPC)

DE GB NL

DOCDB simple family (publication)

EP 0377899 A2 19900718; EP 0377899 A3 19910515; JP H02186552 A 19900720

DOCDB simple family (application)

EP 89124095 A 19891228; JP 367089 A 19890112