Title:
HIGH-PRESSURE GAS DISCHARGE LAMP
Document Type and Number:
WIPO Patent Application WO2004057645
Kind Code:
A3
Abstract:
A high-pressure gas discharge lamp (HID [high intensity discharge] lamp) is described which is in particular free from mercury and suitable for use in automobile technology. The lamp is remarkable in particular for a discharge space (2) which has a volume which is reduced by a given factor in comparison with the volume of the discharge space of known mercury-containing discharge lamps. The quantity of the light-generating substances in the discharge space (2) is reduced by the same factor in the simplest case, or even more strongly. This avoids the risk of an impairment of the imaging properties of the lamp because of non-evaporated light-generating substances which may shade off a portion of the luminous discharge arc (21) and/or the tips of the electrodes (3).
Inventors:
HAACKE MICHAEL (DE)
POSTMA PIETER (DE)
POSTMA PIETER (DE)
Application Number:
PCT/IB2003/005777
Publication Date:
August 26, 2004
Filing Date:
December 09, 2003
Export Citation:
Assignee:
PHILIPS INTELLECTUAL PROPERTY (DE)
KONINKL PHILIPS ELECTRONICS NV (NL)
HAACKE MICHAEL (DE)
POSTMA PIETER (DE)
KONINKL PHILIPS ELECTRONICS NV (NL)
HAACKE MICHAEL (DE)
POSTMA PIETER (DE)
International Classes:
H01J61/12; H01J61/33; H01J61/82; F21Y101/00; (IPC1-7): H01J61/33; H01J61/82
Foreign References:
| EP1150337A1 | 2001-10-31 | |||
| EP0483507A2 | 1992-05-06 | |||
| EP0982760A1 | 2000-03-01 | |||
| US4935668A | 1990-06-19 | |||
| EP1315197A1 | 2003-05-28 | |||
| US6069456A | 2000-05-30 | |||
| EP0443964A1 | 1991-08-28 | |||
| GB1337134A | 1973-11-14 |
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