EP 0618608 A1 19941005 - Fluorescent lamp.
Title (en)
Fluorescent lamp.
Title (de)
Fluoreszentzlampe.
Title (fr)
Lampe fluorescente.
Publication
Application
Priority
JP 7467493 A 19930331
Abstract (en)
There is disclosed a fluorescent lamp comprising:- a bulb (1) of glass containing more than 15% of sodium (Na); a mercury (Hg) vapour sealed in the bulb (1); a fluorescent layer (12) formed inside an inner surface of the bulb (1), the fluorescent layer (12) comprising a fluorescent material including a rare earth fluorescent material; and a protection layer (11) formed between the inner surface of the bulb (1) and the fluorescent layer (12), the protection layer (11) having a thickness of from 0.2 mu m to 1.5 mu m and comprising fine grains of a metal oxide which absorbs ultraviolet rays and thus prevents or slows down any decrease in lighting efficiency of the lamp. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 61/35 (2006.01); H01J 61/40 (2006.01)
CPC (source: EP KR)
H01J 61/35 (2013.01 - EP); H01J 61/40 (2013.01 - EP KR)
Citation (search report)
- [A] EP 0449307 A2 19911002 - TOSHIBA LIGHTING & TECHNOLOGY [JP]
- [A] US 3141990 A 19640721 - RAY JOHN G
- [A] US 3748518 A 19730724 - LEWIS D
- [A] US 4289991 A 19810915 - SCHREURS WILLY P
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 94302234 A 19940329; KR 19940006313 A 19940329