Method for manufacturing a double tube discharge lamp

A discharge lamp and inner tube technology, which is applied in the field of manufacturing discharge, can solve problems such as damage to the sealing part, and achieve the effect of eliminating the risk of rupture

Inactive Publication Date: 2009-01-14
LUMILEDS HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it is considered disadvantageous to provide a sleeve-like extension and create a transverse pumping hole into the sleeve-like extension in the vicinity of the adjacent sealing portion of the inner tube, as this would cause such an extension and / or or risk of damage to the seal, caused by excessive local temperature differences in the creation of such holes

Method used

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  • Method for manufacturing a double tube discharge lamp
  • Method for manufacturing a double tube discharge lamp
  • Method for manufacturing a double tube discharge lamp

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] figure 1 schematically shows a longitudinal section through the main part of a twin-tube discharge lamp comprising a first inner tube 1 and a second outer tube 30 closing the first inner tube 1.

[0024] The first inner tube 1 encloses a discharge chamber 2 which contains a discharge gas. A gas discharge arc is excited between opposite ends of the first electrode 3 and the second electrode 4, which extend into the discharge chamber.

[0025] The second outer tube 30 hermetically closes an inner volume 31 which is preferably filled with gas or dry air or which is evacuated. Furthermore, the second outer tube 30 also closes the first inner tube 1 , the first axial seal 5 and the second axial seal 6 of the first inner tube 1 as well as the first axial extension 7 and the second axial extension. Each of the first axially extending portion 7 and the second axially extending portion 8 passes the first axially sealing portion 5 and the second axially sealing portion 6 throu...

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PUM

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Abstract

A method for manufacturing a discharge lamp comprising at least two tubes or bulbs is disclosed. The lamp is especially a high intensity discharge lamp for use for example in a head lamp of a vehicle, and comprises an inner tube or bulb for enclosing an arc discharge chamber and an outer tube or bulb (30) for sealingly enclosing the inner tube or bulb, wherein the inner volume of the outer tube or bulb (30) is evacuated or filled with a gas in an easy and reliable way by using at least one two-step pinching and/or roll-on process for fixation of both tubes at least at one of their axial ends, wherein in a first step the fixation is carried out in such a way that a passage (20) remains that runs in an at least substantially axial direction of the lamp between the inner volume of the outer tube (30) and the outside of the axialend (8) of the inner tube or bulb through which passage the inner volume is evacuated and/or filled with a gas, and wherein in a second step the passage is sealingly closed by carrying out a second pinching or roll-on process .

Description

technical field technical field [0001] The invention relates to a method for producing a discharge lamp, especially a high-intensity discharge lamp, which is used in particular in motor vehicle headlights and which comprises at least a first inner tube (or bulb) and a second outer tube (or bulb) , the at least one first inner tube is used to close the discharge chamber (discharge vessel), the second outer tube seals the inner volume and the first inner tube, wherein the inner volume of the second outer tube is evacuated or filled with gas The inner volume of the second outer tube is filled. Background technique [0002] There may be several advantages or reasons for providing a double tube discharge lamp. The thermal insulation of the inner tube, which encloses the discharge gas, increases the efficiency of the lamp by means of this thermal insulation. Besides the thermal insulation, the outer tube protects the inner tube mechanically and prevents Contaminants from the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/26H01J61/34H01J61/36C03B23/00
CPCH01J9/266H01J61/34H01J61/368H01J9/26H01J9/395H01J61/36H01J9/24
Inventor N·莱什J·默克斯G·肖莱克
Owner LUMILEDS HLDG BV
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