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Metal halide lamp

A technology of metal halide lamps and halides, which is applied in the direction of discharge lamps, gas discharge lamps, parts of gas discharge lamps, etc., and can solve the problem of low luminous efficacy

Active Publication Date: 2010-12-08
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the specific type of salt mixture used and the high reactivity of Al to the tungsten metal of the electrodes, this known lamp has the disadvantage of a relatively low luminous efficacy (60-70 lm / W), which is critical to Known to negatively affect lamp operating life

Method used

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Examples

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Embodiment Construction

[0016] figure 1 Shown is a metal halide lamp 1 comprising a discharge vessel 10 which is shown in cross-section and in figure 2 is not shown to scale, and the discharge vessel 10 has ceramic walls enclosing a discharge space 11 containing an ionizable filling which, in addition to Hg, also includes NaI, CaI 2 , CeI 3 and MgI 2 .

[0017] figure 2 The discharge vessel is shown in detail. The discharge vessel has a ceramic wall 20 provided at either end with protruding ceramic plugs 30a, 30b to accommodate electrical lead-ins to electrodes 40a and 40b respectively. Each lead-in line includes a halide-resistant part 51a, 51b and a part 52a, 52b, for example, the parts 51a, 51b are made of Mo, and the parts 52a, 52b are respectively connected in an airtight manner by, for example, a ceramic glaze connection 32a, 32b to plugs 30a, 30b. In this description, halide resistance is understood to mean that there is no or substantially no corrosive damage from halides and no halo...

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Abstract

The invention relates to a metal halide lamp (1) combining a high luminous efficacy and a high red rendering. This is realized by a lamp comprising a discharge vessel (10) with a ceramic wall, the discharge vessel enclosing a discharge space (11 ) which contains two electrodes and an ionisable filling, which filling contains at least 20 mol % of a Ca-halide, and one or more halides selected from the group of T1 and the rare earths, wherein the ionisable filling comprises Mg-halide, Mn-halide, or a mixture thereof in a molar quantity of at least 5 mol %, and preferably between 10 and 15 mol % of the total quantity of halides.

Description

technical field [0001] The invention relates to metal halide lamps comprising a discharge vessel with ceramic walls, which discharge vessel encloses a discharge space containing two electrodes and an ionizable filling comprising a halide, the filling Contains at least about 20 mole percent calcium halide and one or more halides selected from the group consisting of Tl and rare earths. Background technique [0002] Arc discharge lamps are increasingly used to replace incandescent lamps in interior and exterior lighting. However, arc discharge lamps do not render red as satisfactorily as incandescent sources. In order to increase the red radiation, calcium halide is usually added to the filling. One or more halides selected from the group consisting of Tl and rare earths are added as a green radiator to obtain a white light source and further improve luminous efficacy. In this description, rare earth metals are understood to mean the elements Sc, Y and the lanthanides. Na ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/82H01J61/12
CPCH01J61/827H01J61/125
Inventor V·费希尔O·G·斯塔帕斯J·J·F·G·休茨
Owner SIGNIFY HLDG BV
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