| 摘要 |
The device (5) has a set of light sources (9a, 9b) i.e. duel color LEDs, to represent directional information with two colors e.g. green and red, in an activated condition. The directional information include both escape route (10) and/or danger route (11). The light sources are arranged in a ribbon-shaped manner. A part of beam of the light sources is directed in a solid angle region and another part of the beam of the light sources is directed in another solid angle region, where the solid angle regions are arranged at certain distance from each other. |
