An electronic ornament that can be worn or attached to or suspended from an object has an LED matrix (21) capable of displaying a user-selected message from a preprogrammed set of graphic symbols or a user-programmed arbitrary pattern or animation. A safety pin (31) or other fastener (34) attaches the...http://www.google.com.hk/patents/US7312773?utm_source=gb-gplus-share專利 US7312773 - Illuminated wearable ornament
