EP 1340243 B1 20070718 - COMPACT, ELECTRODELESS, LOW PRESSURE GAS DISCHARGE LAMP HAVING AN EXTENDED SHELF LIFE
Title (en)
COMPACT, ELECTRODELESS, LOW PRESSURE GAS DISCHARGE LAMP HAVING AN EXTENDED SHELF LIFE
Title (de)
KOMPAKTE ELEKTRODENLOSE NIEDERDRUCK-GASENTLADUNGSLAMPE MIT ERHÖHTER LEBENSDAUER
Title (fr)
LAMPE A DECHARGE GAZEUSE BASSE PRESSION COMPACTE SANS ELECTRODE A DUREE DE VIE ALLONGEE
Publication
Application
Priority
- DE 0104482 W 20011126
- DE 10058852 A 20001127
Abstract (en)
[origin: WO0243107A1] The invention relates to a compact, electrodeless, low pressure gas discharge lamp which is characterised by a long shelf life and high light efficiency and light density. The inventive gas discharge lamp comprises a ball-shaped, ring-shaped, pear-shaped or ellipsoidal glass body which is used as a gas discharge receptacle, on the inner gas surface of which a layer containing at least two luminous substances is applied. The side of the glass bulb facing the gas discharge and/or the layer containing luminous matter and exposed to the gas discharge in the discharge receptacle are coated with a chemically, largely inert protective layer consisting of an oxide. The electrical energy is introduced into the discharge receptacle in an inductive manner using a ring-shaped closed ferrite core, preferably MnZn soft ferrite, which is partially located inside the discharge receptacle and is provided with a primary winding which is connected to an RF source in the frequency region of between 100 kHz and 500 kHz by means of a resonant LC coupling circuit. Part of the ring-shaped ferrite core is introduced into the discharge receptacle by means of a vacuum-tight passage which is arranged in the glass body. The part of the ferrite core, the primary winding and the coupled RF source in the form of an electronic push-pull circuit are arranged in the base of the lamp. The luminous substances used are derived from, for example, the compounds gadolinium-magnesium pentaborate silicate, alkaline earth aluminate, cerium-magnesium aluminate et al., and are activated by ions of rare earth elements and/or manganese, lead, antimony, tin and bismuth. The inventive compact, electrodeless, low pressure gas discharge lamp is used as a light source for general and communal lighting, inside and outside, in the fields of medicine and cosmetics.
IPC 8 full level
H01J 65/04 (2006.01)
CPC (source: EP)
H01J 65/048 (2013.01); H01J 61/327 (2013.01)
Designated contracting state (EPC)
AT DE FR GB
DOCDB simple family (publication)
WO 0243107 A1 20020530; AT E367648 T1 20070815; AU 2474102 A 20020603; DE 10058852 A1 20020606; DE 50112745 D1 20070830; EP 1340243 A1 20030903; EP 1340243 B1 20070718; RU 2003119071 A 20041210
DOCDB simple family (application)
DE 0104482 W 20011126; AT 01994592 T 20011126; AU 2474102 A 20011126; DE 10058852 A 20001127; DE 50112745 T 20011126; EP 01994592 A 20011126; RU 2003119071 A 20011126