Invention Grant
- Patent Title: Ceramic metal halide lamp having dysprosium iodide
- Patent Title (中): 陶瓷金属卤化物灯具有碘化镝
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Application No.: US14021457Application Date: 2013-09-09
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Publication No.: US09275845B2Publication Date: 2016-03-01
- Inventor: Yasuhisa Matsumoto , Yasushi Sasai , Akiyoshi Maehara
- Applicant: Iwasaki Electric Co., Ltd.
- Applicant Address: JP
- Assignee: Iwasaki Electric Co., Ltd.
- Current Assignee: Iwasaki Electric Co., Ltd.
- Current Assignee Address: JP
- Agency: Lerner, David, Littenberg, Krumholz & Mentlik, LLP
- Priority: JP2012-205098 20120918
- Main IPC: H01J17/20
- IPC: H01J17/20 ; H01J61/18 ; H01J61/12 ; H01J61/34 ; H01J61/82
Abstract:
A ceramic metal-halide lamp is provided that can improve both lamp efficacy and color characteristics, and in which light color shift from the white region can be prevented when the lamp is dimmed. The lamp includes a luminous material, which contains sodium iodide (NaI), cerium iodide (CeI3), thallium iodide (TIl), dysprosium iodide (DyI3) and indium iodide (InI). The amount D[DyI3] of dysprosium iodide DyI3 is selected so as to fall within a range of 0.07 mg/cm3≦D[DyI3]≦1.53 mg/cm3 and a weight ratio R[InI/TIl] of indium iodide InI relative to thallium iodide TIl contained in the luminous material is selected to so as to fall within a range of 0
Public/Granted literature
- US20140077694A1 CERAMIC METAL HALIDE LAMP Public/Granted day:2014-03-20
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