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Method for operating a gas discharge lamp of a motor vehicle headlamp

A technology of gas discharge lamps and headlights, which is applied in the field of control devices, can solve the problems of increasing the failure risk of gas discharge lamps, and achieve the effects of reducing power, stabilizing and uniform electrode burning, and stabilizing light operation

Inactive Publication Date: 2013-05-15
AUTOMOTIVE LIGHTING REUTLINGEN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the prior art, protecting the control device against thermal overload means increasing the risk of failure of the gas discharge lamp

Method used

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  • Method for operating a gas discharge lamp of a motor vehicle headlamp
  • Method for operating a gas discharge lamp of a motor vehicle headlamp
  • Method for operating a gas discharge lamp of a motor vehicle headlamp

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Embodiment Construction

[0031] In this case, the same reference numerals designate the same elements or at least elements that are functionally the same in the various figures.

[0032] figure 1 Shown is a gas discharge lamp 10 with a storage device 12 for electrical energy and a control device. A control device is understood here to mean the structural unit by which the operation of the gas discharge lamp 10 is controlled. The control device can be realized here as a separate control device 14 which is connected to the gas discharge lamp 10 via a separate ignition device 16 . In an alternative embodiment, the control device is a structurally integrated unit consisting of the control device 14 and the ignition device 16 in the form of the pre-switching device 13 . It is also possible to realize the control unit as an integral module 17 as a structurally integrated unit with the control device 14 , the ignition device 16 and the gas discharge lamp 10 .

[0033] A first temperature sensor 36 is arra...

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PUM

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Abstract

The invention relates to a method for operating a gas discharge lamp (10) of a motor vehicle headlamp, wherein the gas discharge lamp (10) is operated in a first operating mode at a comparatively higher power and alternating voltage and in a second operating mode in a time-limited manner at a comparatively lower power and direct current voltage. When a switch is made from the first operating mode to the second operating mode, a polarity of the direct current voltage is predefined depending on the polarity of the direct current voltage in at least one previous operating phase of the second operating mode.

Description

technical field [0001] The invention relates to a method for operating a gas discharge lamp of a motor vehicle headlight according to the preamble of claim 1 and to a control device according to the preamble of claim 8 . Such methods and such devices are of course known from the prior art. Background technique [0002] Motor vehicle headlights are arranged in the frontal region of the vehicle and serve to illuminate the road ahead of the vehicle. The gas discharge lamp here acts as a light source, the light of which is distributed by the headlights in the desired light distribution (eg low beam light distribution or high beam light distribution) in the area in front of the headlights, in particular on the roadway superior. A gas discharge lamp has a gas-filled glass flask in which at least two electrodes are located. By igniting a gas discharge lamp, a light-emitting arc is created between the electrodes, which arc is maintained by continuously supplying electrical power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/292H05B41/392B60Q1/00
CPCH05B41/3928Y02B20/202H05B41/2928H05B41/16Y02B20/00
Inventor 多米尼克·内瑟尔克里斯蒂安·约翰
Owner AUTOMOTIVE LIGHTING REUTLINGEN GMBH