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    • 2. 发明专利
    • Lamp bulb, lamp bulb with reflecting mirror, and lighting system
    • 灯泡,带反光镜的灯泡和照明系统
    • JP2008288218A
    • 2008-11-27
    • JP2008190913
    • 2008-07-24
    • Panasonic Corpパナソニック株式会社
    • HASHIMOTO HISATAKAKAWAGOE SHINYAIKEDA HIROSHI
    • H01K1/18H01K7/02
    • H01K1/14H01K1/18H01K7/02
    • PROBLEM TO BE SOLVED: To achieve good light-distribution characteristics while increasing center illumination intensity in a lamp bulb with a reflecting mirror having a narrow beam angle. SOLUTION: A filament body 14 in the lamp bulb with a reflecting mirror has a linear center filament element 19 where a center axis a1 in a longitudinal direction is approximately located on an optical axis Y1 of the reflecting mirror, peripheral filament elements 20, 21, and 22 arranged so as to make center axes b1, c1, and d1 in the longitudinal direction approximately parallel to the center axis a1. The peripheral filament elements 20, 21, and 22 are arranged to form an approximately regular polygon where a point on the center axis a1 becomes the center of gravity when combining together intersection points where the center axes b1, c1, and d1 and a plane perpendicular to the center axis a1 are crossed with each other. The length Lc of the center filament element 19 in the longitudinal direction and the length Ls of the peripheral filament elements 20, 21, and 22 in the longitudinal direction are adjusted to set up a ratio of Ls/Lc from 0.2 to 0.9. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了获得良好的光分布特性,同时增加具有窄光束角的反射镜的灯泡中的中心照明强度。 解决方案:具有反射镜的灯泡中的灯丝体14具有线性中心丝元件19,其中中心轴线a1在纵向方向上大致位于反射镜的光轴Y1上,外围灯丝元件20 21,22配置成使中心轴b1,c1,d1在长度方向大致平行于中心轴线a1。 外围灯丝元件20,21和22被布置成形成近似规则的多边形,其中,当将中心轴线b1,c1和d1与垂直的平面的交点组合在一起时,中心轴线a1上的点成为重心 相对于中心轴线a1交叉。 中心丝元件19的长度方向的长度Lc和长边方向的周长丝元件20,21和22的长度Ls被调节,以使Ls / Lc的比率为0.2〜0.9。 版权所有(C)2009,JPO&INPIT