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A method of driving a gas-discharge lamp

一种气体放电灯、驱动气体的技术，应用在驱动器领域，能够解决放电弧不稳定等问题，达到阻止冷凝、灯寿命延长的效果

Inactive Publication Date: 2013-12-04
LUMILEDS HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, at the zero crossing of the lamp current, this can remain at or close to zero for a significant duration such that the discharge arc becomes unstable

Method used

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  • A method of driving a gas-discharge lamp
  • A method of driving a gas-discharge lamp
  • A method of driving a gas-discharge lamp

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0047] figure 1 A gas discharge lamp 1 according to an embodiment of the invention is shown. The lamp 1 comprises a lamp cap 2 mounted in a base 3 . In the front lighting of a motor vehicle, such a lamp 1 is usually mounted horizontally in the housing such that the longitudinal axis X of the lamp cap 2 is substantially horizontal. The lamp cap 2 comprises an outer glass vessel 20 enclosing an inner discharge vessel 21 . A discharge vessel 21 , typically a quartz glass bulb 21 , comprises a pair of electrodes 4 , 5 arranged along an optical axis X facing each other across a short gap in a discharge chamber 22 enclosed by two clips 40 , 50 seal. The exposed length d of the external electrode 4 4 than the exposed length d of the inner electrode 5 5 slightly longer. This may be the result of a deliberate "displacement" of the electrodes along the longitudinal axis of the lamp cap in order to offset the gap separating the front faces of the electrodes towards the base of the ...

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PUM

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Abstract

The invention describes a method of driving a gas-discharge lamp (1) according to conditions in a specific region (R) of the lamp (1), which gas-discharge lamp (1) comprises a burner (2) in which a first electrode (4) and a second electrode (5) are arranged on either side of a discharge gap, which lamp (1) is realised such that the position (PCs) of a coldest spot during an AC mode of operation is in the vicinity of the first electrode (4), which method comprises the steps of initially driving the lamp (1) in the AC mode of operation; monitoring an environment variable of the lamp (1), which environment variable is indicative of conditions in a specific region (R) of the lamp (1); switching to a temporary DC mode of operation at a DC power value on the basis of the monitored environment variable, whereby the first electrode (4) is allocated as the anode; and driving the lamp (1) in the DC mode of operation until the monitored environment variable has returned to an intermediate environment variable threshold value (TDCAC). The invention also describes a gas-discharge lamp and a driver for a gas-discharge lamp.

Description

technical field [0001] The invention describes a method for operating a gas discharge lamp, a gas discharge lamp and a driver for a gas discharge lamp. Background technique [0002] Gas discharge lamps are often used in lighting applications requiring a very bright light source. An example is a front lighting application such as in the front headlights of a vehicle. Another example might be the lighting of interior spaces such as underground tunnels. Gas discharge lamps for such applications are usually driven using AC (alternating current). In front headlight applications using a gas discharge lamp as a light source, a lighting module typically includes a housing containing a burner and a driver. The term "lamp cap" includes the discharge vessel, usually of quartz glass, enclosing a filling comprising various metal salts, and the outer vessel, usually also of glass. The purpose of the driver is to regulate lamp current and lamp power. For example, the driver can adjust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/292H05B41/38
CPCH05B41/36H05B41/38H05B41/2926
Inventor M.哈亚科L.达布林格豪森X.里伊德雷H.H.胡伊德波尔
Owner LUMILEDS HLDG BV