Invention Grant
- Patent Title: Method for the thermal treatment of tungsten electrodes free from thorium oxide for high-pressure discharge lamps
- Patent Title (中): 高压放电灯不含氧化钍的钨电极的热处理方法
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Application No.: US11568037Application Date: 2005-04-15
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Publication No.: US08087966B2Publication Date: 2012-01-03
- Inventor: Gerhard Hebbinghaus , Jozef Merx
- Applicant: Gerhard Hebbinghaus , Jozef Merx
- Applicant Address: NL Eindhoven
- Assignee: Koninklijke Philips Electronics N.V.
- Current Assignee: Koninklijke Philips Electronics N.V.
- Current Assignee Address: NL Eindhoven
- Priority: EP04101645 20040421
- International Application: PCT/IB2005/051241 WO 20050415
- International Announcement: WO2005/104165 WO 20051103
- Main IPC: H01J9/14
- IPC: H01J9/14 ; H01J17/04
Abstract:
The invention relates to a method for the thermal treatment of tungsten electrodes having a fibrous mocrostructure and being free from thorium oxide for high-pressure discharge lamps, to such a tungsten electrode free from thorium oxide, to a method of manufacturing a high-pressure gas discharge lamp with at least one such tungsten electrode free from thorium oxide, to a high-pressure gas discharge lamp with at least one such tungsten electrode free from thorium oxide, and to a lighting unit with at least one such high-pressure gas discharge lamp.
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