| 摘要 |
An LED signal lamp which includes at least one white LED illumination unit, and at least one light filter each is provided in a light path of each of the white LED illumination unit for filtering at least one portion of light beams of the white LED illumination unit to provide non-white light beams of a predetermined color. Thus colored signal lamp is provided via white LED illumination units, the light efficiency is enhanced, the structure is simple, and the manufacturing costs are low. |
