EP 0903770 A3 19990407 -
Publication
Application
Priority
DE 19731168 A 19970721
Abstract (en)
[origin: US6069456A] Lighting system, comprising a mercury-free metal halide lamp with a light yield of at least 75 lm/W and a color rendition index of at least 75 and an electronic ballast, the electronic ballast impressing a square-wave power supply on the lamp and keeping the power constant. The filling comprises the following components: a buffer gas which also acts as starting gas to start the lamp, a voltage gradient generator, comprising at least one metal halide which vaporizes readily and which is chiefly (by more than 50%) responsible for generating a voltage gradient which corresponds approximately to that of mercury, and a light generator comprising one metal and/or one metal halide.
IPC 1-7
IPC 8 full level
H01J 61/12 (2006.01); H01J 61/18 (2006.01); H01J 61/36 (2006.01); H01J 61/82 (2006.01); H01J 61/88 (2006.01)
CPC (source: EP US)
H01J 61/18 (2013.01 - EP US)
Citation (search report)
- [A] EP 0673183 A2 19950920 - OSRAM SYLVANIA INC [US]
- [A] EP 0507533 A2 19921007 - TOSHIBA LIGHTING & TECHNOLOGY [JP]
- [A] US 5323090 A 19940621 - LESTICIAN GUY J [US]
- [DA] DE 2707204 A1 19771013 - EGYESUELT IZZOLAMPA
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 6069456 A 20000530; AT E274236 T1 20040915; CA 2243737 A1 19990121; CA 2243737 C 20061128; DE 19731168 A1 19990128; DE 59811826 D1 20040923; EP 0903770 A2 19990324; EP 0903770 A3 19990407; EP 0903770 B1 20040818; HU 221394 B1 20020928; HU 9801641 D0 19980928; HU P9801641 A2 19990428; HU P9801641 A3 20010228; JP 4335332 B2 20090930; JP H1186795 A 19990330
DOCDB simple family (application)
US 11849198 A 19980717; AT 98111187 T 19980618; CA 2243737 A 19980720; DE 19731168 A 19970721; DE 59811826 T 19980618; EP 98111187 A 19980618; HU P9801641 A 19980720; JP 20567698 A 19980721