Invention Grant
- Patent Title: High-pressure discharge lamp with improved color point stability and high luminous efficacy
- Patent Title (中): 高压放电灯具有改善的色点稳定性和高发光效率
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Application No.: US10527007Application Date: 2003-08-29
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Publication No.: US07642722B2Publication Date: 2010-01-05
- Inventor: Klaus Schoeller , Rolf Gervelmeyer
- Applicant: Klaus Schoeller , Rolf Gervelmeyer
- Applicant Address: NL Eindhoven
- Assignee: Koninklijke Philips Electronics, N.V.
- Current Assignee: Koninklijke Philips Electronics, N.V.
- Current Assignee Address: NL Eindhoven
- Priority: DE10242203 20020910
- International Application: PCT/IB03/03851 WO 20030829
- International Announcement: WO2004/025691 WO 20040325
- Main IPC: H01J17/00
- IPC: H01J17/00 ; H01J17/20 ; H01J61/12 ; H01J61/18

Abstract:
A high-pressure discharge lamp which is suitable for motor vehicle headlights, has an improved color point stability close to the black body locus, a high color temperature, and a high luminous efficacy (lm/w). The high-pressure discharge lamp includes an inner vessel with a discharge chamber, with at least two electrodes extending into the discharge chamber, and an outer bulb surrounding the inner vessel. The discharge chamber contains an ionizable filling including at least one rare gas, 0-10 mg of mercury, and a metal halide mixture. The metal halide mixture includes 40-80% by weight of sodium halide, 25-55% by weight of scandium halide, 1-15% by weight of indium halide, and 0-34% by weight of thallium halide.
Public/Granted literature
- US20050253528A1 High-pressure discharge lamp with improved color point stability and high luminous efficacy Public/Granted day:2005-11-17
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