LED traffic signal with anti-reflection mask

摘要

In a traffic light, light emitting diodes 24 project from the front of the printed circuit board 18 on which they are mounted and through the apertures 28 in a non-reflective mask 14 covering the front of the board. The mask allows the light from the diodes to be seen but prevents the reflection of sunlight from the other parts of the front of the circuit board.