Abstract: A light-emitting unit is disclosed for optical fiber lightguides. The unit is especially useful for a signal display device for the display of traffic signals. The unit exhibits light fed by way of lightguides to a raster dot in the display area, a light entrance end for connection with the feeding end of the associated lightguide, and a light exit end forming, in the display area, the light exit surface of the raster dot. The unit includes a light-guiding central zone between the light entrance and light exit ends. This zone flares toward the light exit end substantially in a conical or pyramidal fashion. The light-emitting unit according to this invention is distinguished in that a tapering extension section is provided for obtaining a wider emission angle with a uniform, high light intensity over the entire angular range at the light exit end.

Abstract: The invention consists of a device for lighting the light entering ends of a light guide consisting of at least two light guiding fibers, said lighting done by means of two light sources, by which, either singly or using both sources together, the receiving-ends of the light guides are illuminated.

Abstract: In order to confine radiation from an optical fiber display device within a specified angle, a light-transmitting cone is provided either at the input or output end of a set of fibers. The cone can be solid or constructed of conical fibers. The input can be filtered or switched.