A light-emitting device has spherical photo-electric converting elements that have a substantially spherical acceptance surface, respectively; a light emitting diode powered by the spherical photo-electric converting elements; a control circuit; and a sealing member that integrates the spherical photo-electric...http://www.google.fr/patents/US7387400?utm_source=gb-gplus-shareBrevet US7387400 - Light-emitting device with spherical photoelectric converting element
Light-emitting device with spherical photoelectric converting element
