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    • 6. 发明公开
    • MERCURY-FREE METAL HALIDE LAMP FOR VEHICLE AND METAL HALIDE LAMP DEVICE
    • 用于车辆和金属卤化物灯装置的无汞金属卤化物灯
    • EP2725604A1
    • 2014-04-30
    • EP12802474.2
    • 2012-02-21
    • Toshiba Lighting & Technology Corporation
    • KATO, Satoko
    • H01J61/88H01J61/18
    • H01J61/22H01J5/56H01J61/06H01J61/0735H01J61/125H01J61/34H01J61/825H01J61/827
    • A mercury-free metal halide lamp for a vehicle according to an embodiment includes an airtight vessel 1 provided with a light-emitting part 11 with a discharge space 111 inside, a metal halide 2 and a rare gas sealed in the discharge space 111, and a pair of electrodes 32 disposed so that the tip ends of the respective electrodes 32 face each other in the discharge space 111. The electrodes 32 and the discharge space 111 do not contain thorium. When an electric power supplied to the lamp during a stable lighting period is represented by P (W), a value obtained by adding up the electric power supplied to the lamp during a period between 1 second and 40 seconds after the startup of the lamp is represented by W L (W), and the diameter of the electrodes 32 is represented by D (mm), P (W) satisfies 20 ≤ P ≤ 30 and W L /D (W/mm) satisfies 4300 ≤ W L /D ≤ 7400.
    • 根据实施例的用于车辆的无汞金属卤化物灯包括密封容器1,密封容器1设置有内部具有放电空间111的发光部分11,金属卤化物2和密封在放电空间111中的稀有气体,以及 在放电空间111中,各电极32的前端彼此相对配置的一对电极32.电极32和放电空间111不含有钍。 当通过P(W)表示在稳定点亮期间向灯提供的电力时,在灯启动之后的1秒和40秒之间的时段期间通过将提供给灯的电力相加所获得的值是 (W)表示,电极32的直径用D(mm)表示,P(W)满足20≤P≤30,WL / D(W / mm)满足4300≤WL/D≤7400。