HIGH-PRESSURE GAS DISCHARGE LAMP
    1.
    发明公开
    HIGH-PRESSURE GAS DISCHARGE LAMP 有权
    高高压气体放电灯

    公开(公告)号:EP1374280A1

    公开(公告)日:2004-01-02

    申请号:EP02714385.8

    申请日:2002-03-21

    摘要: The invention relates to a high-pressure gas discharge lamp (1), particularly a motorcar lamp, comprising a bulb (2) including at least two neck portions and a vacuum-tight discharge vessel (5) of quartz glass, at least two electrodes (3, 4) projecting into the discharge vessel (5), and a filling in the discharge vessel (5) which, in the operating state, is in a discharge state. Such lamps are used, in particular, in headlights of motorcars. In order to ensure that the arc of the high-pressure gas discharge lamp (1) generates a higher luminescence in a small area, and the lamp (1) can be used as a light source in motorcar headlights, the discharge vessel (5) of the high-pressure gas discharge lamp (1) in accordance with the invention encloses a discharge space (6) having a width B below 4 mm and a length C below 8 mm, and the filling comprises Nal, Scl3, Xe, Znl2, and is free of Hg. Surprisingly it has been found that the use of Znl2 in the filling causes the arc to generate a higher luminescence in the area of the arc axis per dimension of the arc. In the case of motorcar headlights, forming the desired light beam on the street requires the light source to be as punctiform as possible, i.e. the highest possible luminescence is generated in a small area. This enables the design of the reflector to be improved and the arc to be more accurately projected on the street. This applies also to headlights comprising an optical projection system instead of a reflector.

    MERCURY FREE METAL HALIDE LAMP
    5.
    发明公开
    MERCURY FREE METAL HALIDE LAMP 有权
    无汞金属

    公开(公告)号:EP1550147A1

    公开(公告)日:2005-07-06

    申请号:EP03793989.9

    申请日:2003-08-18

    IPC分类号: H01J61/30 H01J61/12 H01J61/82

    摘要: A Hg-free metal halide lamp comprising a substantially cylindrical discharge vessel with a ceramic wall having an internal diameter Di, an internal length Li and a wall thickness Wt, and filled with an ionizable filling, wherein two electrodes are present having a mutual distance EA for maintaining a discharge in the discharge vessel, wherein the filling comprises an inert gas and a salt, wherein the internal length Li is smaller than 8 mm, wherein the electrode distance EA and the internal diameter Di comply with the relation EA/Di>;2, wherein the inert gas pressure PXe at room temperature is at least 5 bar, and wherein the wall thickness Wt and the internal diameter Di comply with the relation Wt/Di>0.15.

    MERCURY FREE METAL HALIDE LAMP
    9.
    发明授权
    MERCURY FREE METAL HALIDE LAMP 有权
    无汞金属

    公开(公告)号:EP1550147B1

    公开(公告)日:2007-02-07

    申请号:EP03793989.9

    申请日:2003-08-18

    IPC分类号: H01J61/30 H01J61/12 H01J61/82

    摘要: A Hg-free metal halide lamp comprising a substantially cylindrical discharge vessel with a ceramic wall having an internal diameter Di, an internal length Li and a wall thickness Wt, and filled with an ionizable filling, wherein two electrodes are present having a mutual distance EA for maintaining a discharge in the discharge vessel, wherein the filling comprises an inert gas and a salt, wherein the internal length Li is smaller than 8 mm, wherein the electrode distance EA and the internal diameter Di comply with the relation EA/Di>;2, wherein the inert gas pressure PXe at room temperature is at least 5 bar, and wherein the wall thickness Wt and the internal diameter Di comply with the relation Wt/Di>0.15.