| 摘要 |
A light emitting diode (LED) signal lamp comprises: at least one white LED (10) and at least one light filter (20). The at least one light filter (20) is arranged on a light ray path of the at least one white LED (10), so as to filter at least a part of light rays emitted by the white LED (10) to obtain colored monochromatic light. A colored-light signal lamp is formed by using a white LED, so the illumination efficiency is improved; moreover, the structure is simple, and the cost is reduced. |
