发明名称 |
SIGNAL LAMP WITH LEDs |
摘要 |
The invention relates to a signal lamp comprising a box-shaped housing having an open end, a number of LEDs being provided in the housing and the open end of the housing being closed by means of a spreading window. The invention is characterized in that the LEDs are clustered around the central axis of the housing and in that the lamp comprises a positive lens (preferably a fresnel lens). The signal lamp in accordance with the invention provides an optimum, homogeneous brightness distribution on the surface of the spreading window. Preferably, the lens has a focal distance f, the LEDs are arranged at a distance v from the lens, and 0.55<v/f<0.975. This measure contributes to the intended optimum homogeneous brightness distribution. |
申请公布号 |
EP0864064(A1) |
申请公布日期 |
1998.09.16 |
申请号 |
EP19970936833 |
申请日期 |
1997.09.08 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
KEUPER, MATTHIJS, HENDRIK;VAN HEES, ANTONIUS, JOHANNES, MARIA |
分类号 |
F21S2/00;F21S8/00;G08G1/095 |
主分类号 |
F21S2/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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