WO2008129487A3 - High pressure discharge lamp and vehicle headlight - Google Patents

High pressure discharge lamp and vehicle headlight Download PDF

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Publication number
WO2008129487A3
WO2008129487A3 PCT/IB2008/051493 IB2008051493W WO2008129487A3 WO 2008129487 A3 WO2008129487 A3 WO 2008129487A3 IB 2008051493 W IB2008051493 W IB 2008051493W WO 2008129487 A3 WO2008129487 A3 WO 2008129487A3
Authority
WO
WIPO (PCT)
Prior art keywords
high pressure
discharge lamp
pressure discharge
discharge
vehicle headlight
Prior art date
Application number
PCT/IB2008/051493
Other languages
French (fr)
Other versions
WO2008129487A2 (en
Inventor
Marcus J H Kessels
Lingli Wang
Original Assignee
Koninkl Philips Electronics Nv
Marcus J H Kessels
Lingli Wang
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninkl Philips Electronics Nv, Marcus J H Kessels, Lingli Wang filed Critical Koninkl Philips Electronics Nv
Publication of WO2008129487A2 publication Critical patent/WO2008129487A2/en
Publication of WO2008129487A3 publication Critical patent/WO2008129487A3/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/045—Thermic screens or reflectors

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

The invention relates to a high pressure discharge lamp (10) and a vehicle headlight (100) comprising the high pressure discharge lamp. The high pressure discharge lamp according to the invention comprises a discharge vessel (12) comprising electrodes (16, 18) for creating a discharge arc (20) and for defining a longitudinal axis (30) connecting the electrodes. The discharge arc is displaced with respect to the longitudinal axis at a distance on a displacement axis (32) arranged perpendicular to the longitudinal axis. The high pressure discharge lamp further comprises a reflective surface (40; 42; 44; 46; 50; 52) for reflecting light emitted by a discharge arc towards a light-transmission window (60; 62) of the discharge vessel while substantially preventing the reflected light to pass through the discharge arc. The effect of the measures according to the invention is that the reflective surface is arranged to redirect the reflected light away from the discharge arc towards the light-transmission window, thus improving an efficiency of the high pressure discharge lamp.
PCT/IB2008/051493 2007-04-24 2008-04-18 High pressure discharge lamp and vehicle headlight WO2008129487A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07106796.1 2007-04-24
EP07106796 2007-04-24

Publications (2)

Publication Number Publication Date
WO2008129487A2 WO2008129487A2 (en) 2008-10-30
WO2008129487A3 true WO2008129487A3 (en) 2008-12-18

Family

ID=39760920

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/051493 WO2008129487A2 (en) 2007-04-24 2008-04-18 High pressure discharge lamp and vehicle headlight

Country Status (1)

Country Link
WO (1) WO2008129487A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6010022B2 (en) * 2010-05-26 2016-10-19 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． Gas discharge lamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19814788A1 (en) * 1998-04-02 1999-10-07 Bosch Gmbh Robert Headlamp for cars with dipped beam and main beam
DE19843418A1 (en) * 1998-09-22 2000-03-23 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High-pressure discharge lamp and associated lighting system
US6445129B1 (en) * 1996-03-16 2002-09-03 Robert Bosch Gmbh Gas discharge lamp, in particular for motor-vehicle headlights
WO2006021910A2 (en) * 2004-08-26 2006-03-02 Philips Intellectual Property & Standards Gmbh Lamp with reflective coating
US20070018581A1 (en) * 2005-07-20 2007-01-25 Koito Manufacturing Co., Ltd. Discharge bulb and automobile headlamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6445129B1 (en) * 1996-03-16 2002-09-03 Robert Bosch Gmbh Gas discharge lamp, in particular for motor-vehicle headlights
DE19814788A1 (en) * 1998-04-02 1999-10-07 Bosch Gmbh Robert Headlamp for cars with dipped beam and main beam
DE19843418A1 (en) * 1998-09-22 2000-03-23 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High-pressure discharge lamp and associated lighting system
WO2006021910A2 (en) * 2004-08-26 2006-03-02 Philips Intellectual Property & Standards Gmbh Lamp with reflective coating
US20070018581A1 (en) * 2005-07-20 2007-01-25 Koito Manufacturing Co., Ltd. Discharge bulb and automobile headlamp

Also Published As

Publication number Publication date
WO2008129487A2 (en) 2008-10-30

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