Title:
パルス操作に対するハロゲンランプ
Document Type and Number:
Japanese Patent JP2012520544
Kind Code:
A
Abstract:
The invention relates to a halogen automotive lamp for pulse width operation, a lighting assembly including a halogen lamp and to a method of operating a halogen lamp. The lamp comprises a transparent lamp vessel with a gas filling comprising a rare gas component and a halogen component. A filament is arranged within the vessel. In conventional halogen lamps operation with pulsed electrical power, such as e.g. PWM operation of automotive halogen lamps for cornering and bending light lead to shortened lifetimes. In order to propose a lamp with increased lifetime under pulse operation, the gas filling comprises nitrogen in an amount of 0.1-5 mol-%. It has surprisingly been found that filament deformation may be counteracted by the corresponding small amount of nitrogen.
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Inventors:
Myrdels, Barbara Ayr
Schenfelder, Bernd
Caver, Birgit
Schenfelder, Bernd
Caver, Birgit
Application Number:
JP2011553565A
Publication Date:
September 06, 2012
Filing Date:
March 03, 2010
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H01K1/50; H01K1/18
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito