A light-emitting message character display device suitable for use in high ambient light levels such as are encountered in aircraft cockpits at high altitudes utilizes optic fiber light guides for converting one or more primary light sources into corresponding illuminated message characters emanating...http://www.google.fr/patents/US4121206?utm_source=gb-gplus-shareBrevet US4121206 - Fiber optic message character display device and method of making same
Fiber optic message character display device and method of making same
