| 摘要 |
A 3-color LED indication lamp is provided to extend a lifetime of the indication lamp by using a LEDs(Light Emitting Diodes) rather than a bulb as an optical source. A 3-color LED indication lamp is attached to a side surface of a train to indicate a current state of the train. Three holes(12) are formed on a planar housing(10). A semi-sphere lens(13) is inserted into the respective holes from behind. A PCB(Printed Circuit Board)(30) is introduced into the lens of the housing. One of three color LEDs(20) is attached on one surface of the elongated end of the PCB. A controller transmits a signal corresponding to a current state of a train to the PCB, such that one of the LED is turned on according to the received signal. |
